diff --git a/client/src/components/Budget/CostsPanel.tsx b/client/src/components/Budget/CostsPanel.tsx
index e2f548757..820651cb0 100644
--- a/client/src/components/Budget/CostsPanel.tsx
+++ b/client/src/components/Budget/CostsPanel.tsx
@@ -1,17 +1,17 @@
 import { Fragment, useState, useEffect, useMemo, useCallback } from 'react'
 import { useSearchParams } from 'react-router'
-import { ArrowDown, ArrowUp, BarChart3, Plus, Search, ArrowRight, ArrowLeftRight, Check, RotateCcw, Pencil, Trash2, AlertCircle, Download, StickyNote, ChevronDown } from 'lucide-react'
+import { ArrowDown, ArrowUp, BarChart3, Plus, Search, ArrowRight, ArrowLeftRight, Check, RotateCcw, Pencil, Trash2, AlertCircle, Download, StickyNote, ChevronDown, Receipt, Paperclip } from 'lucide-react'
 import { useTripStore } from '../../store/tripStore'
 import { useAuthStore } from '../../store/authStore'
 import { useSettingsStore } from '../../store/settingsStore'
 import { useCanDo } from '../../store/permissionsStore'
 import { useToast } from '../shared/Toast'
 import { useTranslation } from '../../i18n'
-import { budgetApi } from '../../api/client'
+import { budgetApi, filesApi } from '../../api/client'
 import { useExchangeRates } from '../../hooks/useExchangeRates'
 import { useIsMobile } from '../../hooks/useIsMobile'
 import { formatMoney, currencyDecimals, currencyLocale, localizeAmountInput, amountToInputString } from '../../utils/formatters'
-import { downloadBlob } from '../../utils/fileDownload'
+import { downloadBlob, openFile } from '../../utils/fileDownload'
 import Modal from '../shared/Modal'
 import CustomSelect from '../shared/CustomSelect'
 import { CustomDatePicker } from '../shared/CustomDateTimePicker'
@@ -19,7 +19,8 @@ import { localToday } from '../Planner/today'
 import { SYMBOLS, currenciesWith, SPLIT_COLORS } from './BudgetPanel.constants'
 import { amountPattern, calculateTicketShares, hasTicketSplit, NOTE_MAX, payersBalanced, readTicketItems, readUserNote, rebalancePayers, splitEqualShares, writeTicketItems, type TicketItem } from './CostsPanel.helpers'
 import { COST_CATEGORY_LIST, catMeta } from './costsCategories'
-import type { BudgetItem } from '../../types'
+import { ReceiptPreviewModal } from './ReceiptPreviewModal'
+import type { BudgetItem, BudgetItemReceipt } from '../../types'
 import type { TripMember } from './BudgetPanelMemberChips'
 import GuestBadge from '../shared/GuestBadge'
 import { NumericInput } from '../shared/NumericInput'
@@ -84,6 +85,7 @@ export default function CostsPanel({ tripId, tripMembers = [] }: CostsPanelProps
   const [dayFilter, setDayFilter] = useState('')   // '' = all days, else YYYY-MM-DD
   const [modalOpen, setModalOpen] = useState(false)
   const [editing, setEditing] = useState<BudgetItem | null>(null)
+  const [previewReceipts, setPreviewReceipts] = useState<{ receipts: BudgetItemReceipt[]; initialIndex: number } | null>(null)
   // One note open at a time: two expanded rows next to each other read as a mess,
   // and the point of the collapse is that the list stays scannable.
   const [expandedNoteId, setExpandedNoteId] = useState<number | null>(null)
@@ -492,6 +494,14 @@ export default function CostsPanel({ tripId, tripMembers = [] }: CostsPanelProps
           onSaved={() => { setEditingSettlement(null); setAddingPayment(false); loadSettlement() }} />
       )}
 
+      {previewReceipts && (
+        <ReceiptPreviewModal
+          receipts={previewReceipts.receipts}
+          initialIndex={previewReceipts.initialIndex}
+          onClose={() => setPreviewReceipts(null)}
+        />
+      )}
+
       <style>{`
         .costs-root {
           --c-bg: #f8fafc; --c-bg2: oklch(0.965 0.01 70);
@@ -762,6 +772,32 @@ export default function CostsPanel({ tripId, tripMembers = [] }: CostsPanelProps
                 {t('costs.unfinished')}
               </span>
             )}
+            {(e.receipts || []).length > 0 && (
+              <button
+                type="button"
+                onClick={(ev) => {
+                  ev.stopPropagation()
+                  setPreviewReceipts({ receipts: e.receipts!, initialIndex: 0 })
+                }}
+                title={t('costs.viewReceipt')}
+                className="bg-surface-secondary border border-edge text-content-muted hover:text-content hover:border-content-faint transition-all"
+                style={{
+                  display: 'inline-flex',
+                  alignItems: 'center',
+                  gap: 5,
+                  padding: '2px 8px',
+                  borderRadius: 999,
+                  fontSize: 'calc(11px * var(--fs-scale-caption, 1))',
+                  fontWeight: 600,
+                  flexShrink: 0,
+                  cursor: 'pointer',
+                  fontFamily: 'inherit',
+                }}
+              >
+                <Receipt size={12} className="text-content-muted" />
+                <span>{t('costs.receipts') || 'Beleg'}{e.receipts!.length > 1 ? ` (${e.receipts!.length})` : ''}</span>
+              </button>
+            )}
           </div>
           {cur !== base && (
             <div className="text-content-faint" style={{ marginTop: 4, fontSize: 'calc(12px * var(--fs-scale-body, 1))', whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>
@@ -1122,6 +1158,24 @@ export function ExpenseModal({ tripId, base, people, me, editing, prefill, onClo
     return m
   })
 
+  const [receipts, setReceipts] = useState<BudgetItemReceipt[]>(() => editing?.receipts || [])
+  const [pendingReceiptFiles, setPendingReceiptFiles] = useState<File[]>([])
+  const [uploadingReceipt, setUploadingReceipt] = useState(false)
+  const [modalPreviewReceipts, setModalPreviewReceipts] = useState<{ receipts: BudgetItemReceipt[]; initialIndex: number } | null>(null)
+
+  const handleReceiptFileSelect = (files: FileList | File[] | null) => {
+    if (!files || files.length === 0) return
+    setPendingReceiptFiles(prev => [...prev, ...Array.from(files)])
+  }
+
+  const handleRemoveReceipt = (receiptId: number) => {
+    setReceipts(prev => prev.filter(r => r.id !== receiptId))
+  }
+
+  const handleRemovePendingReceipt = (index: number) => {
+    setPendingReceiptFiles(prev => prev.filter((_, i) => i !== index))
+  }
+
   const [saving, setSaving] = useState(false)
 
   const isTicketMode = splitMode === 'ticket'
@@ -1318,8 +1372,53 @@ export function ExpenseModal({ tripId, base, people, me, editing, prefill, onClo
       ...(!editing && prefill?.placeId ? { place_id: prefill.placeId } : {}),
     }
     try {
-      if (editing) await updateBudgetItem(tripId, editing.id, data)
-      else await addBudgetItem(tripId, data)
+      // Upload any pending receipt files
+      const uploadedFileIds: number[] = []
+      try {
+        for (const f of pendingReceiptFiles) {
+          const fd = new FormData()
+          fd.append('file', f)
+          if (editing) {
+            fd.append('budget_item_id', String(editing.id))
+          }
+          const res = await filesApi.upload(tripId, fd)
+          if (res?.file?.id) {
+            uploadedFileIds.push(res.file.id)
+          }
+        }
+      } catch (err) {
+        for (const fid of uploadedFileIds) {
+          try { await filesApi.permanentDelete(tripId, fid) } catch {}
+        }
+        throw err
+      }
+
+      let createdOrUpdated: BudgetItem
+      if (editing) {
+        try {
+          createdOrUpdated = await updateBudgetItem(tripId, editing.id, {
+            ...data,
+            receipt_file_ids: [...receipts.map(r => r.id), ...uploadedFileIds],
+          })
+        } catch (err) {
+          for (const fid of uploadedFileIds) {
+            try { await filesApi.permanentDelete(tripId, fid) } catch {}
+          }
+          throw err
+        }
+      } else {
+        try {
+          createdOrUpdated = await addBudgetItem(tripId, {
+            ...data,
+            receipt_file_ids: uploadedFileIds,
+          })
+        } catch (err) {
+          for (const fid of uploadedFileIds) {
+            try { await filesApi.permanentDelete(tripId, fid) } catch {}
+          }
+          throw err
+        }
+      }
       onSaved()
     } catch {
       toast.error(t('common.unknownError'))
@@ -1633,8 +1732,91 @@ export function ExpenseModal({ tripId, base, people, me, editing, prefill, onClo
             placeholder={t('costs.notePlaceholder')} maxLength={NOTE_MAX}
             className={inputCls} style={{ borderRadius: 10, padding: '10px 13px', fontSize: 'calc(13.5px * var(--fs-scale-body, 1))', outline: 'none', resize: 'vertical', minHeight: 68, width: '100%', boxSizing: 'border-box', fontFamily: 'inherit', lineHeight: 1.5 }} />
         </div>
+
+        <div className={panelCls}>
+          <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 10 }}>
+            <label className={labelCls} style={{ marginBottom: 0 }}>{t('costs.receiptsTitle') || t('costs.receipts')}</label>
+            <label style={{ display: 'inline-flex', alignItems: 'center', gap: 6, cursor: 'pointer', fontSize: 'calc(12px * var(--fs-scale-caption, 1))', fontWeight: 600, color: 'var(--text-primary)' }}>
+              <input
+                type="file"
+                multiple
+                accept="image/*,application/pdf"
+                style={{ display: 'none' }}
+                onChange={e => {
+                  handleReceiptFileSelect(e.target.files)
+                  e.target.value = ''
+                }}
+              />
+              <span className="bg-surface-card border border-edge text-content-muted hover:text-content transition-colors" style={{ display: 'inline-flex', alignItems: 'center', gap: 5, padding: '5px 11px', borderRadius: 999 }}>
+                <Plus size={13} /> {t('costs.attachReceipt')}
+              </span>
+            </label>
+          </div>
+
+          {uploadingReceipt && (
+            <div className="text-content-faint" style={{ fontSize: 'calc(12px * var(--fs-scale-caption, 1))', marginBottom: 8 }}>
+              {t('common.saving')}...
+            </div>
+          )}
+
+          {receipts.length === 0 && pendingReceiptFiles.length === 0 ? (
+            <div className="text-content-faint" style={{ fontSize: 'calc(12.5px * var(--fs-scale-body, 1))', padding: '6px 0' }}>
+              {t('costs.noReceipts')}
+            </div>
+          ) : (
+            <div style={{ display: 'flex', flexDirection: 'column', gap: 7 }}>
+              {receipts.map((r, rIdx) => (
+                <div key={r.id} className="bg-surface-secondary border border-edge" style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 8, padding: '7px 11px', borderRadius: 10 }}>
+                  <button
+                    type="button"
+                    onClick={() => setModalPreviewReceipts({ receipts, initialIndex: rIdx })}
+                    className="text-content hover:underline"
+                    style={{ display: 'inline-flex', alignItems: 'center', gap: 7, minWidth: 0, background: 'none', border: 0, padding: 0, cursor: 'pointer', textAlign: 'left', fontFamily: 'inherit', fontSize: 'calc(13px * var(--fs-scale-body, 1))' }}
+                  >
+                    <Receipt size={14} className="text-content-faint flex-shrink-0" />
+                    <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{r.original_name}</span>
+                  </button>
+                  <button
+                    type="button"
+                    onClick={() => handleRemoveReceipt(r.id)}
+                    title={t('costs.deleteReceipt')}
+                    className="text-content-muted hover:text-red-500 transition-colors"
+                    style={{ background: 'none', border: 0, padding: 3, cursor: 'pointer', display: 'flex', alignItems: 'center' }}
+                  >
+                    <Trash2 size={14} />
+                  </button>
+                </div>
+              ))}
+              {pendingReceiptFiles.map((file, idx) => (
+                <div key={idx} className="bg-surface-secondary border border-edge" style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 8, padding: '7px 11px', borderRadius: 10 }}>
+                  <div style={{ display: 'inline-flex', alignItems: 'center', gap: 7, minWidth: 0, fontSize: 'calc(13px * var(--fs-scale-body, 1))' }}>
+                    <Paperclip size={14} className="text-content-faint flex-shrink-0" />
+                    <span className="text-content" style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{file.name}</span>
+                  </div>
+                  <button
+                    type="button"
+                    onClick={() => handleRemovePendingReceipt(idx)}
+                    title={t('costs.deleteReceipt')}
+                    className="text-content-muted hover:text-red-500 transition-colors"
+                    style={{ background: 'none', border: 0, padding: 3, cursor: 'pointer', display: 'flex', alignItems: 'center' }}
+                  >
+                    <Trash2 size={14} />
+                  </button>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
         </div>
       </div>
+
+      {modalPreviewReceipts && (
+        <ReceiptPreviewModal
+          receipts={modalPreviewReceipts.receipts}
+          initialIndex={modalPreviewReceipts.initialIndex}
+          onClose={() => setModalPreviewReceipts(null)}
+        />
+      )}
     </Modal>
   )
 }
diff --git a/client/src/components/Budget/ReceiptPreviewModal.tsx b/client/src/components/Budget/ReceiptPreviewModal.tsx
new file mode 100644
index 000000000..ec965ccc3
--- /dev/null
+++ b/client/src/components/Budget/ReceiptPreviewModal.tsx
@@ -0,0 +1,394 @@
+import { useState, useEffect } from 'react'
+import { createPortal } from 'react-dom'
+import { ExternalLink, Download, X, FileText, ChevronLeft, ChevronRight, FileImage } from 'lucide-react'
+import { useTranslation } from '../../i18n'
+import { getAuthUrl } from '../../api/authUrl'
+import { openFile as openFileUrl } from '../../utils/fileDownload'
+import { triggerDownload, isImage } from '../Files/FileManager.helpers'
+import type { BudgetItemReceipt } from '../../types'
+
+interface ReceiptPreviewModalProps {
+  receipts: BudgetItemReceipt[]
+  initialIndex?: number
+  onClose: () => void
+}
+
+export function ReceiptPreviewModal({ receipts, initialIndex = 0, onClose }: ReceiptPreviewModalProps) {
+  const { t } = useTranslation()
+  const [index, setIndex] = useState(Math.max(0, Math.min(initialIndex, receipts.length - 1)))
+  const [signedUrl, setSignedUrl] = useState('')
+  const [loading, setLoading] = useState(false)
+
+  const current = receipts[index]
+  const isImg = isImage(current?.mime_type)
+  const isPdf = current?.mime_type === 'application/pdf' || current?.original_name?.toLowerCase().endsWith('.pdf')
+
+  useEffect(() => {
+    if (!current) return
+    let cancelled = false
+    setLoading(true)
+    setSignedUrl('')
+
+    getAuthUrl(current.url, 'download')
+      .then(url => {
+        if (!cancelled) {
+          setSignedUrl(url)
+          setLoading(false)
+        }
+      })
+      .catch(() => {
+        if (!cancelled) setLoading(false)
+      })
+
+    return () => { cancelled = true }
+  }, [current?.url])
+
+  useEffect(() => {
+    const handleKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose()
+      if (e.key === 'ArrowLeft' && index > 0) setIndex(i => i - 1)
+      if (e.key === 'ArrowRight' && index < receipts.length - 1) setIndex(i => i + 1)
+    }
+    window.addEventListener('keydown', handleKey)
+    return () => window.removeEventListener('keydown', handleKey)
+  }, [index, receipts.length, onClose])
+
+  if (!current) return null
+
+  const handleOpenTab = () => {
+    openFileUrl(current.url, current.original_name).catch(() => {})
+  }
+
+  const handleDownload = () => {
+    triggerDownload(current.url, current.original_name)
+  }
+
+  return createPortal(
+    <div
+      role="presentation"
+      style={{
+        position: 'fixed',
+        inset: 0,
+        background: 'rgba(0, 0, 0, 0.85)',
+        zIndex: 10000,
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        padding: 16,
+      }}
+      onClick={e => {
+        if (e.target === e.currentTarget) onClose()
+      }}
+    >
+      <div
+        role="presentation"
+        style={{
+          width: '100%',
+          maxWidth: 950,
+          height: '94vh',
+          background: 'var(--bg-card)',
+          borderRadius: 12,
+          overflow: 'hidden',
+          display: 'flex',
+          flexDirection: 'column',
+          boxShadow: '0 20px 60px rgba(0,0,0,0.3)',
+        }}
+        onClick={e => e.stopPropagation()}
+      >
+        {/* Header - identical to PdfPreviewModal */}
+        <div
+          style={{
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'space-between',
+            padding: '10px 16px',
+            borderBottom: '1px solid var(--border-primary)',
+            flexShrink: 0,
+          }}
+        >
+          <span
+            style={{
+              fontSize: 'calc(13px * var(--fs-scale-body, 1))',
+              fontWeight: 600,
+              color: 'var(--text-primary)',
+              overflow: 'hidden',
+              textOverflow: 'ellipsis',
+              whiteSpace: 'nowrap',
+              flex: 1,
+            }}
+          >
+            {current.original_name}
+          </span>
+          <div style={{ display: 'flex', alignItems: 'center', gap: 8, flexShrink: 0 }}>
+            <button
+              type="button"
+              onClick={handleOpenTab}
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                gap: 4,
+                fontSize: 'calc(12px * var(--fs-scale-body, 1))',
+                color: 'var(--text-muted)',
+                background: 'none',
+                border: 'none',
+                cursor: 'pointer',
+                textDecoration: 'none',
+                padding: '4px 8px',
+                borderRadius: 6,
+                transition: 'color 0.15s',
+              }}
+              onMouseEnter={e => (e.currentTarget.style.color = 'var(--text-primary)')}
+              onMouseLeave={e => (e.currentTarget.style.color = 'var(--text-muted)')}
+            >
+              <ExternalLink size={13} /> {t('files.openTab')}
+            </button>
+            <button
+              type="button"
+              onClick={handleDownload}
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                gap: 4,
+                fontSize: 'calc(12px * var(--fs-scale-body, 1))',
+                color: 'var(--text-muted)',
+                background: 'none',
+                border: 'none',
+                cursor: 'pointer',
+                textDecoration: 'none',
+                padding: '4px 8px',
+                borderRadius: 6,
+                transition: 'color 0.15s',
+              }}
+              onMouseEnter={e => (e.currentTarget.style.color = 'var(--text-primary)')}
+              onMouseLeave={e => (e.currentTarget.style.color = 'var(--text-muted)')}
+            >
+              <Download size={13} /> {t('files.download') || 'Download'}
+            </button>
+            <button
+              type="button"
+              onClick={onClose}
+              style={{
+                background: 'none',
+                border: 'none',
+                cursor: 'pointer',
+                color: 'var(--text-faint)',
+                display: 'flex',
+                padding: 4,
+                borderRadius: 6,
+                transition: 'color 0.15s',
+              }}
+              onMouseEnter={e => (e.currentTarget.style.color = 'var(--text-primary)')}
+              onMouseLeave={e => (e.currentTarget.style.color = 'var(--text-faint)')}
+            >
+              <X size={18} />
+            </button>
+          </div>
+        </div>
+
+        {/* Tab strip if multiple receipts */}
+        {receipts.length > 1 && (
+          <div
+            className="bg-surface-secondary"
+            style={{
+              display: 'flex',
+              alignItems: 'center',
+              gap: 6,
+              padding: '6px 14px',
+              borderBottom: '1px solid var(--border-primary)',
+              overflowX: 'auto',
+              flexShrink: 0,
+            }}
+          >
+            {receipts.map((r, i) => {
+              const active = i === index
+              const isRImg = isImage(r.mime_type)
+              const Icon = isRImg ? FileImage : FileText
+              return (
+                <button
+                  key={r.id}
+                  type="button"
+                  onClick={() => setIndex(i)}
+                  className={active ? 'bg-surface-card text-content font-semibold shadow-sm' : 'text-content-muted hover:text-content'}
+                  style={{
+                    display: 'inline-flex',
+                    alignItems: 'center',
+                    gap: 6,
+                    padding: '5px 11px',
+                    borderRadius: 8,
+                    border: active ? '1px solid var(--border-primary)' : '1px solid transparent',
+                    background: active ? 'var(--bg-card)' : 'none',
+                    fontSize: 'calc(11.5px * var(--fs-scale-caption, 1))',
+                    cursor: 'pointer',
+                    whiteSpace: 'nowrap',
+                    flexShrink: 0,
+                    fontFamily: 'inherit',
+                    transition: 'all 0.15s',
+                  }}
+                >
+                  <Icon size={12} className={active ? 'text-content' : 'text-content-faint'} />
+                  <span style={{ maxWidth: 160, overflow: 'hidden', textOverflow: 'ellipsis' }}>
+                    {r.original_name}
+                  </span>
+                  <span
+                    style={{
+                      fontSize: 'calc(10px * var(--fs-scale-caption, 1))',
+                      opacity: active ? 0.8 : 0.5,
+                      marginLeft: 2,
+                    }}
+                  >
+                    #{i + 1}
+                  </span>
+                </button>
+              )
+            })}
+          </div>
+        )}
+
+        {/* Content Body */}
+        <div
+          style={{
+            flex: 1,
+            position: 'relative',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            overflow: 'hidden',
+            background: isImg ? '#0f141c' : 'var(--bg-card)',
+            minHeight: 0,
+          }}
+        >
+          {receipts.length > 1 && index > 0 && (
+            <button
+              type="button"
+              onClick={() => setIndex(i => i - 1)}
+              style={{
+                position: 'absolute',
+                left: 14,
+                top: '50%',
+                transform: 'translateY(-50%)',
+                zIndex: 10,
+                width: 36,
+                height: 36,
+                borderRadius: '50%',
+                background: 'rgba(0,0,0,0.5)',
+                color: '#fff',
+                border: '1px solid rgba(255,255,255,0.2)',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                cursor: 'pointer',
+              }}
+            >
+              <ChevronLeft size={20} />
+            </button>
+          )}
+
+          {receipts.length > 1 && index < receipts.length - 1 && (
+            <button
+              type="button"
+              onClick={() => setIndex(i => i + 1)}
+              style={{
+                position: 'absolute',
+                right: 14,
+                top: '50%',
+                transform: 'translateY(-50%)',
+                zIndex: 10,
+                width: 36,
+                height: 36,
+                borderRadius: '50%',
+                background: 'rgba(0,0,0,0.5)',
+                color: '#fff',
+                border: '1px solid rgba(255,255,255,0.2)',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                cursor: 'pointer',
+              }}
+            >
+              <ChevronRight size={20} />
+            </button>
+          )}
+
+          {isPdf ? (
+            <object
+              data={signedUrl ? `${signedUrl}#view=FitH` : undefined}
+              type="application/pdf"
+              style={{ flex: 1, width: '100%', height: '100%', border: 'none' }}
+              title={current.original_name}
+            >
+              <p style={{ padding: 24, textAlign: 'center', color: 'var(--text-muted)' }}>
+                <button
+                  type="button"
+                  onClick={handleOpenTab}
+                  style={{
+                    color: 'var(--text-primary)',
+                    textDecoration: 'underline',
+                    background: 'none',
+                    border: 'none',
+                    cursor: 'pointer',
+                    font: 'inherit',
+                  }}
+                >
+                  {t('files.downloadPdf')}
+                </button>
+              </p>
+            </object>
+          ) : isImg ? (
+            <div
+              style={{
+                padding: 16,
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                width: '100%',
+                height: '100%',
+              }}
+            >
+              {signedUrl ? (
+                <img
+                  src={signedUrl}
+                  alt={current.original_name}
+                  style={{
+                    maxWidth: '100%',
+                    maxHeight: '100%',
+                    objectFit: 'contain',
+                    borderRadius: 6,
+                    display: 'block',
+                  }}
+                />
+              ) : (
+                <div className="text-content-faint" style={{ padding: 48 }}>
+                  {loading ? `${t('common.loading')}...` : current.original_name}
+                </div>
+              )}
+            </div>
+          ) : (
+            <div style={{ padding: 40, textAlign: 'center' }}>
+              <FileText size={44} className="text-content-muted mx-auto" style={{ marginBottom: 16 }} />
+              <p className="text-content font-medium" style={{ marginBottom: 14 }}>
+                {current.original_name}
+              </p>
+              <button
+                type="button"
+                onClick={handleDownload}
+                className="bg-primary text-white"
+                style={{
+                  padding: '9px 18px',
+                  borderRadius: 10,
+                  border: 0,
+                  cursor: 'pointer',
+                  fontWeight: 600,
+                  fontSize: 'calc(13px * var(--fs-scale-body, 1))',
+                  fontFamily: 'inherit',
+                }}
+              >
+                {t('files.download')}
+              </button>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>,
+    document.body
+  )
+}
diff --git a/client/src/mobile/screens/trip/sheets/MCostSheet.tsx b/client/src/mobile/screens/trip/sheets/MCostSheet.tsx
index 5cbba6c30..7bbacabe5 100644
--- a/client/src/mobile/screens/trip/sheets/MCostSheet.tsx
+++ b/client/src/mobile/screens/trip/sheets/MCostSheet.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useMemo, useRef, useState } from 'react'
-import { Check, ChevronDown, Plus, Trash2, Wallet } from 'lucide-react'
+import { Check, ChevronDown, Plus, Trash2, Wallet, Receipt, Paperclip } from 'lucide-react'
 import MSheet from '../../../components/MSheet'
 import CustomSelect from '../../../../components/shared/CustomSelect'
 import { CustomDatePicker } from '../../../../components/shared/CustomDateTimePicker'
@@ -10,6 +10,8 @@ import { useToast } from '../../../../components/shared/Toast'
 import { useTripStore } from '../../../../store/tripStore'
 import { useExchangeRates } from '../../../../hooks/useExchangeRates'
 import { formatMoney, localizeAmountInput, amountToInputString } from '../../../../utils/formatters'
+import { openFile } from '../../../../utils/fileDownload'
+import { filesApi } from '../../../../api/client'
 import { SYMBOLS, SPLIT_COLORS, currenciesWith } from '../../../../components/Budget/BudgetPanel.constants'
 import { COST_CATEGORY_LIST, catMeta } from '../../../../components/Budget/costsCategories'
 import { localToday } from '../../../../components/Planner/today'
@@ -18,7 +20,8 @@ import type { ExpensePrefill } from '../../../../components/Budget/CostsPanel'
 import { payersBalanced, rebalancePayers } from '../../../../components/Budget/CostsPanel.helpers'
 import GuestBadge from '../../../../components/shared/GuestBadge'
 import type { TripMember } from '../../../../components/Budget/BudgetPanelMemberChips'
-import type { BudgetItem } from '../../../../types'
+import { ReceiptPreviewModal } from '../../../../components/Budget/ReceiptPreviewModal'
+import type { BudgetItem, BudgetItemReceipt } from '../../../../types'
 
 export interface MCostSheetProps {
   tripId: number
@@ -123,6 +126,24 @@ export default function MCostSheet({ tripId, base, people, me, editing, prefill,
     return m
   })
 
+  const [receipts, setReceipts] = useState<BudgetItemReceipt[]>(() => editing?.receipts || [])
+  const [pendingReceiptFiles, setPendingReceiptFiles] = useState<File[]>([])
+  const [uploadingReceipt, setUploadingReceipt] = useState(false)
+  const [previewReceipts, setPreviewReceipts] = useState<{ receipts: BudgetItemReceipt[]; initialIndex: number } | null>(null)
+
+  const handleReceiptFileSelect = (files: FileList | File[] | null) => {
+    if (!files || files.length === 0) return
+    setPendingReceiptFiles(prev => [...prev, ...Array.from(files)])
+  }
+
+  const handleRemoveReceipt = (receiptId: number) => {
+    setReceipts(prev => prev.filter(r => r.id !== receiptId))
+  }
+
+  const handleRemovePendingReceipt = (index: number) => {
+    setPendingReceiptFiles(prev => prev.filter((_, i) => i !== index))
+  }
+
   const [saving, setSaving] = useState(false)
   const [deleteArmed, setDeleteArmed] = useState(false)
 
@@ -270,8 +291,52 @@ export default function MCostSheet({ tripId, base, people, me, editing, prefill,
       ...(!editing && prefill?.placeId ? { place_id: prefill.placeId } : {}),
     }
     try {
-      if (editing) await updateBudgetItem(tripId, editing.id, data)
-      else await addBudgetItem(tripId, data)
+      // Upload any pending receipt files
+      const uploadedFileIds: number[] = []
+      try {
+        for (const f of pendingReceiptFiles) {
+          const fd = new FormData()
+          fd.append('file', f)
+          if (editing) {
+            fd.append('budget_item_id', String(editing.id))
+          }
+          const res = await filesApi.upload(tripId, fd)
+          if (res?.file?.id) {
+            uploadedFileIds.push(res.file.id)
+          }
+        }
+      } catch (err) {
+        for (const fid of uploadedFileIds) {
+          try { await filesApi.permanentDelete(tripId, fid) } catch {}
+        }
+        throw err
+      }
+
+      if (editing) {
+        try {
+          await updateBudgetItem(tripId, editing.id, {
+            ...data,
+            receipt_file_ids: [...receipts.map(r => r.id), ...uploadedFileIds],
+          })
+        } catch (err) {
+          for (const fid of uploadedFileIds) {
+            try { await filesApi.permanentDelete(tripId, fid) } catch {}
+          }
+          throw err
+        }
+      } else {
+        try {
+          await addBudgetItem(tripId, {
+            ...data,
+            receipt_file_ids: uploadedFileIds,
+          })
+        } catch (err) {
+          for (const fid of uploadedFileIds) {
+            try { await filesApi.permanentDelete(tripId, fid) } catch {}
+          }
+          throw err
+        }
+      }
       onSaved()
     } catch {
       toast.error(t('common.unknownError'))
@@ -641,6 +706,77 @@ export default function MCostSheet({ tripId, base, people, me, editing, prefill,
           placeholder={t('costs.notePlaceholder')}
           className={FIELD_AREA_CLS}
         />
+
+        {/* RECEIPTS */}
+        <div className="mb-[6px] mt-4 flex items-center justify-between">
+          <Eyebrow className="uppercase">{t('costs.receiptsTitle') || t('costs.receipts')}</Eyebrow>
+          <label className="flex cursor-pointer items-center gap-1 text-[0.75rem] font-semibold text-m-ink">
+            <input
+              type="file"
+              multiple
+              accept="image/*,application/pdf"
+              className="hidden"
+              onChange={e => {
+                handleReceiptFileSelect(e.target.files)
+                e.target.value = ''
+              }}
+            />
+            <span className="flex items-center gap-1 rounded-full border border-[color:var(--m-rowbr)] bg-[color:var(--m-ic)] px-2.5 py-1 text-m-muted">
+              <Plus size={12} /> {t('costs.attachReceipt')}
+            </span>
+          </label>
+        </div>
+
+        {uploadingReceipt && (
+          <div className="mb-2 text-[0.75rem] text-m-faint">
+            {t('common.saving')}...
+          </div>
+        )}
+
+        {receipts.length === 0 && pendingReceiptFiles.length === 0 ? (
+          <div className="py-1 text-[0.75rem] text-m-faint">
+            {t('costs.noReceipts')}
+          </div>
+        ) : (
+          <div className="flex flex-col gap-1.5 pb-2">
+            {receipts.map((r, rIdx) => (
+              <div key={r.id} className={ROW_CLS}>
+                <button
+                  type="button"
+                  onClick={() => setPreviewReceipts({ receipts, initialIndex: rIdx })}
+                  className="flex min-w-0 flex-1 items-center gap-2 text-left"
+                >
+                  <Receipt size={14} className="flex-none text-m-faint" />
+                  <span className="truncate text-[0.8125rem] font-medium text-m-ink">{r.original_name}</span>
+                </button>
+                <button
+                  type="button"
+                  onClick={() => handleRemoveReceipt(r.id)}
+                  title={t('costs.deleteReceipt')}
+                  className="flex-none p-1 text-m-muted hover:text-red-500"
+                >
+                  <Trash2 size={14} />
+                </button>
+              </div>
+            ))}
+            {pendingReceiptFiles.map((file, idx) => (
+              <div key={idx} className={ROW_CLS}>
+                <div className="flex min-w-0 flex-1 items-center gap-2">
+                  <Paperclip size={14} className="flex-none text-m-faint" />
+                  <span className="truncate text-[0.8125rem] font-medium text-m-ink">{file.name}</span>
+                </div>
+                <button
+                  type="button"
+                  onClick={() => handleRemovePendingReceipt(idx)}
+                  title={t('costs.deleteReceipt')}
+                  className="flex-none p-1 text-m-muted hover:text-red-500"
+                >
+                  <Trash2 size={14} />
+                </button>
+              </div>
+            ))}
+          </div>
+        )}
       </div>
 
       <FormSheetFooter
@@ -653,6 +789,14 @@ export default function MCostSheet({ tripId, base, people, me, editing, prefill,
         submitLabel={submitLabel}
         submitDisabled={!valid || saving}
       />
+
+      {previewReceipts && (
+        <ReceiptPreviewModal
+          receipts={previewReceipts.receipts}
+          initialIndex={previewReceipts.initialIndex}
+          onClose={() => setPreviewReceipts(null)}
+        />
+      )}
     </MSheet>
   )
 }
diff --git a/client/src/mobile/screens/trip/tabs/MCostsTab.tsx b/client/src/mobile/screens/trip/tabs/MCostsTab.tsx
index a87cdec3e..641f5c93c 100644
--- a/client/src/mobile/screens/trip/tabs/MCostsTab.tsx
+++ b/client/src/mobile/screens/trip/tabs/MCostsTab.tsx
@@ -1,7 +1,7 @@
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import {
   AlertCircle, ArrowDown, ArrowLeftRight, ArrowRight, ArrowUp, Check, ChevronDown, ChevronUp,
-  Layers, Pencil, Plus, StickyNote, Trash2,
+  Layers, Pencil, Plus, StickyNote, Trash2, Receipt,
 } from 'lucide-react'
 import MDancingTrek from '../../../components/MDancingTrek'
 import { useAuthStore } from '../../../../store/authStore'
@@ -9,9 +9,10 @@ import { useSettingsStore } from '../../../../store/settingsStore'
 import { useExchangeRates } from '../../../../hooks/useExchangeRates'
 import { useTranslation } from '../../../../i18n'
 import { formatMoney } from '../../../../utils/formatters'
-import { downloadBlob } from '../../../../utils/fileDownload'
+import { downloadBlob, openFile } from '../../../../utils/fileDownload'
 import { budgetApi } from '../../../../api/client'
 import MCostSheet from '../sheets/MCostSheet'
+import { ReceiptPreviewModal } from '../../../../components/Budget/ReceiptPreviewModal'
 import { readUserNote } from '../../../../components/Budget/CostsPanel.helpers'
 import { catMeta, COST_CAT_META } from '../../../../components/Budget/costsCategories'
 import MConfirmSheet from '../../settings/MConfirmSheet'
@@ -25,7 +26,7 @@ import {
   dayFilterKeys, filterBudgetItems, filterSettlements, groupLedgerByDay, isUnfinished, memberShareOf, tint,
   type CostsCtx, type CostsSegment, type CostsSettlement, type CostsSettlementResponse,
 } from './costsModel'
-import type { BudgetItem, TripMember } from '../../../../types'
+import type { BudgetItem, BudgetItemReceipt, TripMember } from '../../../../types'
 
 type TFn = (key: string, params?: Record<string, string | number>) => string
 
@@ -78,6 +79,7 @@ export default function MCostsTab({ planner, shell }: MTabScreenProps) {
   const [expenseModalOpen, setExpenseModalOpen] = useState(false)
   const [editingExpense, setEditingExpense] = useState<BudgetItem | null>(null)
   const [confirmDelete, setConfirmDelete] = useState<BudgetItem | null>(null)
+  const [previewReceipts, setPreviewReceipts] = useState<{ receipts: BudgetItemReceipt[]; initialIndex: number } | null>(null)
 
   const flows = useMemo(() => settlement?.flows || [], [settlement])
   const totals = useMemo(() => computeTotals(budgetItems, flows, ctx), [budgetItems, flows, ctx])
@@ -455,6 +457,7 @@ export default function MCostsTab({ planner, shell }: MTabScreenProps) {
                 }}
                 onDelete={() => setConfirmDelete(en.item)}
                 onTogglePaid={(userId, paid) => handleTogglePaid(en.item.id, userId, paid)}
+                onPreviewReceipts={(receipts) => setPreviewReceipts({ receipts, initialIndex: 0 })}
               />
             ) : (
               <PaymentRow
@@ -528,12 +531,20 @@ export default function MCostsTab({ planner, shell }: MTabScreenProps) {
           if (item) handleDeleteExpense(item)
         }}
       />
+
+      {previewReceipts && (
+        <ReceiptPreviewModal
+          receipts={previewReceipts.receipts}
+          initialIndex={previewReceipts.initialIndex}
+          onClose={() => setPreviewReceipts(null)}
+        />
+      )}
     </TabScroller>
   )
 }
 
 /** One expense card (spec 03 §3.7): category ribbon, optional unfinished ribbon, member chips, total pill, edit/delete stack. */
-function ExpenseRow({ item, ctx, base, locale, t, canEdit, onEdit, onDelete, onTogglePaid }: {
+function ExpenseRow({ item, ctx, base, locale, t, canEdit, onEdit, onDelete, onTogglePaid, onPreviewReceipts }: {
   item: BudgetItem
   ctx: CostsCtx
   base: string
@@ -543,6 +554,7 @@ function ExpenseRow({ item, ctx, base, locale, t, canEdit, onEdit, onDelete, onT
   onEdit: () => void
   onDelete: () => void
   onTogglePaid: (userId: number, paid: boolean) => void
+  onPreviewReceipts: (receipts: BudgetItemReceipt[]) => void
 }) {
   const meta = catMeta(item.category)
   const Icon = meta.Icon
@@ -577,7 +589,23 @@ function ExpenseRow({ item, ctx, base, locale, t, canEdit, onEdit, onDelete, onT
 
         <div className="flex items-center gap-[10px]">
           <div className="min-w-0 flex-1">
-            <div className="truncate text-[0.8125rem] font-bold text-m-ink">{item.name}</div>
+            <div className="flex items-center gap-1.5 min-w-0">
+              <span className="truncate text-[0.8125rem] font-bold text-m-ink">{item.name}</span>
+              {(item.receipts || []).length > 0 && (
+                <button
+                  type="button"
+                  onClick={(ev) => {
+                    ev.stopPropagation()
+                    onPreviewReceipts(item.receipts!)
+                  }}
+                  title={t('costs.viewReceipt')}
+                  className="inline-flex items-center gap-1 rounded-full border border-[color:var(--m-rowbr)] bg-[color:var(--m-ic)] px-2 py-0.5 text-[0.625rem] font-semibold text-m-muted active:scale-95 transition-all"
+                >
+                  <Receipt size={11} className="text-m-faint" />
+                  <span>{t('costs.receipts') || 'Beleg'}{item.receipts!.length > 1 ? ` (${item.receipts!.length})` : ''}</span>
+                </button>
+              )}
+            </div>
             {cur !== base && (
               <div className="mt-[1px] truncate font-geist text-[0.59375rem] text-m-faint">
                 {formatMoney(item.total_price, cur, locale)} {'→'} {formatMoney(total, base, locale)}
diff --git a/client/src/types.ts b/client/src/types.ts
index 695ce3ebb..72f55b0ef 100644
--- a/client/src/types.ts
+++ b/client/src/types.ts
@@ -22,6 +22,7 @@ import type {
   PackingBagMember,
   BudgetItem,
   BudgetItemMember,
+  BudgetItemReceipt,
   Reservation,
   ReservationEndpoint,
   Accommodation,
@@ -45,6 +46,7 @@ export type {
   PackingBagMember,
   BudgetItem,
   BudgetItemMember,
+  BudgetItemReceipt,
   Reservation,
   ReservationEndpoint,
   Accommodation,
diff --git a/server/src/db/migrations.ts b/server/src/db/migrations.ts
index c26f6cc09..be08b9c24 100644
--- a/server/src/db/migrations.ts
+++ b/server/src/db/migrations.ts
@@ -4415,6 +4415,26 @@ function runMigrations(db: Database.Database): void {
          WHERE UPPER(country_code) = 'CN' AND region_code = 'CN-GUANGZHOUPROVINCE'`,
       ).run();
     },
+    /**
+     * Let a file hang off an expense, so a receipt or an invoice can be attached
+     * to what it paid for.
+     *
+     * A column on `file_links` rather than a table of its own: the row already
+     * ties one file to one thing, and every other attachment kind is a column
+     * here too. The unique index stops the same receipt being linked twice;
+     * SQLite treats NULLs as distinct, so the rows that exist today, which all
+     * carry a NULL here, do not collide with each other.
+     *
+     * Appended LAST: the array is index-addressed against schema_version.
+     */
+    () => {
+      const flCols = db.prepare("SELECT name FROM pragma_table_info('file_links')").all() as Array<{ name: string }>;
+      if (!flCols.some((c) => c.name === 'budget_item_id')) {
+        db.exec('ALTER TABLE file_links ADD COLUMN budget_item_id INTEGER REFERENCES budget_items(id) ON DELETE CASCADE');
+      }
+      db.exec('CREATE UNIQUE INDEX IF NOT EXISTS idx_file_links_file_budget ON file_links(file_id, budget_item_id)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_file_links_budget_item_id ON file_links(budget_item_id)');
+    },
   ];
 
   if (currentVersion < migrations.length) {
diff --git a/server/src/nest/budget/budget.service.ts b/server/src/nest/budget/budget.service.ts
index 13b272f93..e71a7b40f 100644
--- a/server/src/nest/budget/budget.service.ts
+++ b/server/src/nest/budget/budget.service.ts
@@ -4,7 +4,7 @@ import type { TrekWsPayload, TrekWsTripEventName } from '@trek/shared';
 import { RealtimeService } from '../realtime/realtime.service';
 import { PermissionsService } from '../permissions/permissions.service';
 import { avatarUrl } from '../common/avatarUrl';
-import type { User, BudgetItem, BudgetItemMember, BudgetItemPayer } from '../../types';
+import type { User, BudgetItem, BudgetItemMember, BudgetItemPayer, BudgetItemReceipt } from '../../types';
 import { ExchangeRatesService } from './exchange-rates.service';
 
 type Trip = TripAccess;
@@ -143,6 +143,32 @@ export class BudgetService {
     return rows.map(p => ({ ...p, avatar_url: avatarUrl(p) }));
   }
 
+  private loadItemReceipts(itemId: number | string): BudgetItemReceipt[] {
+    const rows = this.db.all<{
+      id: number;
+      filename: string;
+      original_name: string;
+      file_size: number | null;
+      mime_type: string | null;
+      trip_id: number;
+    }>(`
+      SELECT f.id, f.filename, f.original_name, f.file_size, f.mime_type, f.trip_id
+      FROM trip_files f
+      JOIN file_links fl ON fl.file_id = f.id
+      WHERE f.deleted_at IS NULL AND fl.budget_item_id = ?
+      ORDER BY f.created_at ASC
+    `, itemId);
+
+    return rows.map(f => ({
+      id: f.id,
+      filename: f.filename,
+      original_name: f.original_name,
+      file_size: f.file_size,
+      mime_type: f.mime_type,
+      url: `/api/trips/${f.trip_id}/files/${f.id}/download`,
+    }));
+  }
+
   /**
    * The subset of `userIds` that is actually on this trip. Used to be a plain
    * existence check against `users`, which let any id on the instance become a
@@ -177,6 +203,37 @@ export class BudgetService {
     return total;
   }
 
+  /**
+   * Move a receipt file to trash if it is only linked to this budget item and
+   * not referenced by any other reservation, place, or day assignment.
+   */
+  private trashOrphanReceipt(fileId: number | string, budgetItemId: number | string) {
+    const file = this.db.get<{ id: number; place_id: number | null; reservation_id: number | null }>(
+      'SELECT id, place_id, reservation_id FROM trip_files WHERE id = ? AND deleted_at IS NULL',
+      fileId,
+    );
+    if (!file) return;
+
+    // Check if file is tied directly to another entity via legacy columns
+    if (file.place_id || file.reservation_id) return;
+
+    // Check if file is linked via file_links to another reservation, place, assignment, or other budget item
+    const otherLinks = this.db.get<{ count: number }>(`
+      SELECT COUNT(*) as count FROM file_links
+      WHERE file_id = ? AND (
+        reservation_id IS NOT NULL OR
+        place_id IS NOT NULL OR
+        assignment_id IS NOT NULL OR
+        (budget_item_id IS NOT NULL AND budget_item_id != ?)
+      )
+    `, fileId, budgetItemId);
+
+    if (otherLinks && otherLinks.count > 0) return;
+
+    // It is an orphan receipt solely belonging to this budget item: move to trash
+    this.db.run('UPDATE trip_files SET deleted_at = CURRENT_TIMESTAMP WHERE id = ?', fileId);
+  }
+
   // -------------------------------------------------------------------------
   // CRUD
   // -------------------------------------------------------------------------
@@ -225,9 +282,42 @@ export class BudgetService {
       }
     }
 
+    const receiptsByItem: Record<number, BudgetItemReceipt[]> = {};
+    if (itemIds.length > 0) {
+      const placeholders = itemIds.map(() => '?').join(',');
+      const allReceipts = this.db.all<{
+        id: number;
+        filename: string;
+        original_name: string;
+        file_size: number | null;
+        mime_type: string | null;
+        trip_id: number;
+        budget_item_id: number;
+      }>(`
+        SELECT f.id, f.filename, f.original_name, f.file_size, f.mime_type, f.trip_id, fl.budget_item_id
+        FROM trip_files f
+        JOIN file_links fl ON fl.file_id = f.id
+        WHERE f.deleted_at IS NULL AND fl.budget_item_id IN (${placeholders})
+        ORDER BY f.created_at ASC
+      `, ...itemIds);
+
+      for (const r of allReceipts) {
+        if (!receiptsByItem[r.budget_item_id]) receiptsByItem[r.budget_item_id] = [];
+        receiptsByItem[r.budget_item_id].push({
+          id: r.id,
+          filename: r.filename,
+          original_name: r.original_name,
+          file_size: r.file_size,
+          mime_type: r.mime_type,
+          url: `/api/trips/${r.trip_id}/files/${r.id}/download`,
+        });
+      }
+    }
+
     items.forEach(item => {
       item.members = membersByItem[item.id] || [];
       item.payers = payersByItem[item.id] || [];
+      item.receipts = receiptsByItem[item.id] || [];
     });
     return items;
   }
@@ -352,6 +442,7 @@ export class BudgetService {
       ticket_json?: string | null;
       reservation_id?: number | null;
       place_id?: number | null;
+      receipt_file_ids?: number[];
     },
   ) {
     return this.db.transaction(() => {
@@ -409,19 +500,32 @@ export class BudgetService {
         for (const uid of memberIds) insert.run(itemId, uid);
       }
 
+      if (data.receipt_file_ids && data.receipt_file_ids.length > 0) {
+        const insertLink = this.db.prepare('INSERT OR IGNORE INTO file_links (file_id, budget_item_id) VALUES (?, ?)');
+        for (const fid of data.receipt_file_ids) {
+          // Verify file belongs to this trip
+          const belongs = this.db.get('SELECT id FROM trip_files WHERE id = ? AND trip_id = ? AND deleted_at IS NULL', fid, tripId);
+          if (belongs) {
+            insertLink.run(fid, itemId);
+          }
+        }
+      }
+
       const item = this.db.get<BudgetItem>('SELECT * FROM budget_items WHERE id = ?', itemId)!;
       item.members = this.loadItemMembers(itemId);
       item.payers = this.loadItemPayers(itemId);
+      item.receipts = this.loadItemReceipts(itemId);
       return item;
     });
   }
 
-  /** Fetch a single budget item hydrated with its members and payers, scoped to the trip. */
+  /** Fetch a single budget item hydrated with its members, payers, and receipts, scoped to the trip. */
   getBudgetItem(id: string | number, tripId: string | number): BudgetItem | null {
     const item = this.db.get<BudgetItem>('SELECT * FROM budget_items WHERE id = ? AND trip_id = ?', id, tripId);
     if (!item) return null;
     item.members = this.loadItemMembers(id);
     item.payers = this.loadItemPayers(id);
+    item.receipts = this.loadItemReceipts(id);
     return item;
   }
 
@@ -445,6 +549,7 @@ export class BudgetService {
       members?: { user_id: number; amount?: number | null }[];
       persons?: number | null; days?: number | null; note?: string | null; sort_order?: number; expense_date?: string | null;
       ticket_json?: string | null;
+      receipt_file_ids?: number[];
     },
   ) {
     return this.db.transaction(() => {
@@ -522,9 +627,39 @@ export class BudgetService {
         }
       }
 
+      if (data.receipt_file_ids !== undefined) {
+        // Find existing receipt file IDs for this budget item
+        const oldReceiptFiles = this.db.all<{ id: number }>(`
+          SELECT f.id FROM trip_files f
+          JOIN file_links fl ON fl.file_id = f.id
+          WHERE f.deleted_at IS NULL AND fl.budget_item_id = ?
+        `, id).map(r => r.id);
+
+        // Sync receipts: delete previous links and add new ones
+        this.db.run('DELETE FROM file_links WHERE budget_item_id = ?', id);
+        if (data.receipt_file_ids.length > 0) {
+          const insertLink = this.db.prepare('INSERT OR IGNORE INTO file_links (file_id, budget_item_id) VALUES (?, ?)');
+          for (const fid of data.receipt_file_ids) {
+            const belongs = this.db.get('SELECT id FROM trip_files WHERE id = ? AND trip_id = ? AND deleted_at IS NULL', fid, tripId);
+            if (belongs) {
+              insertLink.run(fid, id);
+            }
+          }
+        }
+
+        // Any previously attached receipt that was unlinked now moves to trash if orphan
+        const newSet = new Set(data.receipt_file_ids);
+        for (const oldFid of oldReceiptFiles) {
+          if (!newSet.has(oldFid)) {
+            this.trashOrphanReceipt(oldFid, id);
+          }
+        }
+      }
+
       const updated = this.db.get<BudgetItem>('SELECT * FROM budget_items WHERE id = ?', id)!;
       updated.members = this.loadItemMembers(id);
       updated.payers = this.loadItemPayers(id);
+      updated.receipts = this.loadItemReceipts(id);
       return updated;
     });
   }
@@ -551,7 +686,21 @@ export class BudgetService {
     );
     if (!item) return false;
     return this.db.transaction(() => {
+      // Find all receipts attached to this item before deleting it
+      const receiptFiles = this.db.all<{ id: number }>(`
+        SELECT f.id FROM trip_files f
+        JOIN file_links fl ON fl.file_id = f.id
+        WHERE f.deleted_at IS NULL AND fl.budget_item_id = ?
+      `, id).map(r => r.id);
+
+      // Move exclusively attached receipts to trash
+      for (const fid of receiptFiles) {
+        this.trashOrphanReceipt(fid, id);
+      }
+
+      this.db.run('DELETE FROM file_links WHERE budget_item_id = ?', id);
       this.db.run('DELETE FROM budget_items WHERE id = ?', id);
+
       // The booking keeps a copy of this expense's total in its metadata, and
       // the reservation update path preserves that copy across edits. With the
       // expense gone there is nothing left to mirror, so drop it here rather
diff --git a/server/src/nest/files/files.controller.ts b/server/src/nest/files/files.controller.ts
index 246c4b953..c5077c0a8 100644
--- a/server/src/nest/files/files.controller.ts
+++ b/server/src/nest/files/files.controller.ts
@@ -91,10 +91,10 @@ export class FilesController {
   ) {}
 
 
-  // A file may only point at reservations/assignments/places from its own trip.
+  // A file may only point at reservations/assignments/places/budget_items from its own trip.
   // Reject cross-trip ids before they are stored — the reservation JOIN would
   // otherwise leak the foreign reservation's title back to the caller.
-  private assertLinkTargets(tripId: string, body: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null }) {
+  private assertLinkTargets(tripId: string, body: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null; budget_item_id?: string | number | null }) {
     if (this.files.findForeignLinkTarget(tripId, body)) {
       throw new HttpException({ error: 'Linked item does not belong to this trip' }, 400);
     }
@@ -148,7 +148,7 @@ export class FilesController {
       throw new HttpException({ error: 'File is too large' }, 400);
     }
     try {
-      this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, place_id: body.place_id });
+      this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, place_id: body.place_id, budget_item_id: body.budget_item_id });
     } catch (err) {
       cleanup();
       throw err;
@@ -165,6 +165,7 @@ export class FilesController {
       place_id: body.place_id,
       description: body.description,
       reservation_id: body.reservation_id,
+      budget_item_id: body.budget_item_id,
     });
     this.files.broadcast(tripId, 'file:created', { file: created }, socketId);
     return { file: created };
@@ -180,8 +181,13 @@ export class FilesController {
     if (!file) {
       throw new HttpException({ error: 'File not found' }, 404);
     }
-    this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, place_id: body.place_id });
-    const updated = this.files.updateFile(id, file, { description: body.description, place_id: body.place_id, reservation_id: body.reservation_id });
+    this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, place_id: body.place_id, budget_item_id: body.budget_item_id });
+    const updated = this.files.updateFile(id, file, {
+      description: body.description,
+      place_id: body.place_id,
+      reservation_id: body.reservation_id,
+      budget_item_id: body.budget_item_id,
+    });
     this.files.broadcast(tripId, 'file:updated', { file: updated }, socketId);
     return { file: updated };
   }
@@ -268,8 +274,8 @@ export class FilesController {
     if (!file) {
       throw new HttpException({ error: 'File not found' }, 404);
     }
-    this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, assignment_id: body.assignment_id, place_id: body.place_id });
-    const links = this.files.createFileLink(id, { reservation_id: body.reservation_id, assignment_id: body.assignment_id, place_id: body.place_id });
+    this.assertLinkTargets(tripId, { reservation_id: body.reservation_id, assignment_id: body.assignment_id, place_id: body.place_id, budget_item_id: body.budget_item_id });
+    const links = this.files.createFileLink(id, { reservation_id: body.reservation_id, assignment_id: body.assignment_id, place_id: body.place_id, budget_item_id: body.budget_item_id });
     return { success: true, links };
   }
 
diff --git a/server/src/nest/files/files.service.ts b/server/src/nest/files/files.service.ts
index 77a17c5db..415b95a8a 100644
--- a/server/src/nest/files/files.service.ts
+++ b/server/src/nest/files/files.service.ts
@@ -37,6 +37,7 @@ export interface FileLink {
   file_id: number;
   reservation_id: number | null;
   place_id: number | null;
+  budget_item_id: number | null;
 }
 
 /**
@@ -137,8 +138,8 @@ export class FilesService {
    */
   findForeignLinkTarget(
     tripId: string | number,
-    opts: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null }
-  ): 'reservation_id' | 'assignment_id' | 'place_id' | null {
+    opts: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null; budget_item_id?: string | number | null }
+  ): 'reservation_id' | 'assignment_id' | 'place_id' | 'budget_item_id' | null {
     if (opts.reservation_id && !this.db.get('SELECT 1 FROM reservations WHERE id = ? AND trip_id = ?', opts.reservation_id, tripId)) {
       return 'reservation_id';
     }
@@ -148,6 +149,9 @@ export class FilesService {
     if (opts.assignment_id && !this.db.get('SELECT 1 FROM day_assignments a JOIN days d ON a.day_id = d.id WHERE a.id = ? AND d.trip_id = ?', opts.assignment_id, tripId)) {
       return 'assignment_id';
     }
+    if (opts.budget_item_id && !this.db.get('SELECT 1 FROM budget_items WHERE id = ? AND trip_id = ?', opts.budget_item_id, tripId)) {
+      return 'budget_item_id';
+    }
     return null;
   }
 
@@ -229,7 +233,7 @@ export class FilesService {
     const linksMap: Record<number, FileLink[]> = {};
     if (fileIds.length > 0) {
       const placeholders = fileIds.map(() => '?').join(',');
-      const links = this.db.all<FileLink>(`SELECT file_id, reservation_id, place_id FROM file_links WHERE file_id IN (${placeholders})`, ...fileIds);
+      const links = this.db.all<FileLink>(`SELECT file_id, reservation_id, place_id, budget_item_id FROM file_links WHERE file_id IN (${placeholders})`, ...fileIds);
       for (const link of links) {
         if (!linksMap[link.file_id]) linksMap[link.file_id] = [];
         linksMap[link.file_id].push(link);
@@ -242,6 +246,7 @@ export class FilesService {
         ...formatFile(f),
         linked_reservation_ids: fileLinks.filter(l => l.reservation_id).map(l => l.reservation_id),
         linked_place_ids: fileLinks.filter(l => l.place_id).map(l => l.place_id),
+        linked_budget_item_ids: fileLinks.filter(l => l.budget_item_id).map(l => l.budget_item_id),
       };
     });
   }
@@ -250,7 +255,7 @@ export class FilesService {
     tripId: string | number,
     file: { filename: string; originalname: string; size: number; mimetype: string },
     uploadedBy: number,
-    opts: { place_id?: string | number | null; reservation_id?: string | number | null; description?: string | null }
+    opts: { place_id?: string | number | null; reservation_id?: string | number | null; budget_item_id?: string | number | null; description?: string | null }
   ) {
     const result = this.db.run(`
       INSERT INTO trip_files (trip_id, place_id, reservation_id, filename, original_name, file_size, mime_type, description, uploaded_by)
@@ -267,6 +272,10 @@ export class FilesService {
       uploadedBy
     );
 
+    if (opts.budget_item_id) {
+      this.db.run('INSERT OR IGNORE INTO file_links (file_id, budget_item_id) VALUES (?, ?)', result.lastInsertRowid, opts.budget_item_id);
+    }
+
     const created = this.db.get<TripFile>(`${FILE_SELECT} WHERE f.id = ?`, result.lastInsertRowid)!;
     return formatFile(created);
   }
@@ -274,7 +283,7 @@ export class FilesService {
   updateFile(
     id: string | number,
     current: TripFile,
-    updates: { description?: string; place_id?: string | number | null; reservation_id?: string | number | null }
+    updates: { description?: string; place_id?: string | number | null; reservation_id?: string | number | null; budget_item_id?: string | number | null }
   ) {
     this.db.run(`
       UPDATE trip_files SET
@@ -289,6 +298,14 @@ export class FilesService {
       id
     );
 
+    if (updates.budget_item_id !== undefined) {
+      if (updates.budget_item_id) {
+        this.db.run('INSERT OR IGNORE INTO file_links (file_id, budget_item_id) VALUES (?, ?)', id, updates.budget_item_id);
+      } else {
+        this.db.run('DELETE FROM file_links WHERE file_id = ? AND budget_item_id IS NOT NULL', id);
+      }
+    }
+
     const updated = this.db.get<TripFile>(`${FILE_SELECT} WHERE f.id = ?`, id)!;
     return formatFile(updated);
   }
@@ -355,10 +372,10 @@ export class FilesService {
   // of returning a success-shaped links list (the legacy catch swallowed it).
   createFileLink(
     fileId: string | number,
-    opts: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null }
+    opts: { reservation_id?: string | number | null; assignment_id?: string | number | null; place_id?: string | number | null; budget_item_id?: string | number | null }
   ) {
-    this.db.run('INSERT OR IGNORE INTO file_links (file_id, reservation_id, assignment_id, place_id) VALUES (?, ?, ?, ?)',
-      fileId, opts.reservation_id || null, opts.assignment_id || null, opts.place_id || null
+    this.db.run('INSERT OR IGNORE INTO file_links (file_id, reservation_id, assignment_id, place_id, budget_item_id) VALUES (?, ?, ?, ?, ?)',
+      fileId, opts.reservation_id || null, opts.assignment_id || null, opts.place_id || null, opts.budget_item_id || null
     );
     return this.db.all('SELECT * FROM file_links WHERE file_id = ?', fileId);
   }
diff --git a/server/src/types.ts b/server/src/types.ts
index 18e457a7b..cbb56802c 100644
--- a/server/src/types.ts
+++ b/server/src/types.ts
@@ -127,6 +127,15 @@ export interface PackingItem {
   created_at?: string;
 }
 
+export interface BudgetItemReceipt {
+  id: number;
+  filename: string;
+  original_name: string;
+  file_size?: number | null;
+  mime_type?: string | null;
+  url: string;
+}
+
 export interface BudgetItem {
   id: number;
   trip_id: number;
@@ -150,6 +159,7 @@ export interface BudgetItem {
   created_at?: string;
   members?: BudgetItemMember[];
   payers?: BudgetItemPayer[];
+  receipts?: BudgetItemReceipt[];
 }
 
 export interface BudgetItemMember {
diff --git a/server/tests/unit/nest/budget.service.db.test.ts b/server/tests/unit/nest/budget.service.db.test.ts
index 35b2ed133..159cc1ebd 100644
--- a/server/tests/unit/nest/budget.service.db.test.ts
+++ b/server/tests/unit/nest/budget.service.db.test.ts
@@ -946,4 +946,112 @@ describe('an expense whose split leaves a remainder', () => {
 
     expect(totalOf(item.id)).toBe(25);
   });
-})
+
+  it('attaches receipts created with receipt_file_ids and lists them', () => {
+    const { user: alice } = createUser(testDb);
+    const trip = createTrip(testDb, alice.id);
+
+    // Insert a file for this trip
+    const res = testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name, mime_type, file_size) VALUES (?, ?, ?, ?, ?)').run(
+      trip.id, 'receipt-123.jpg', 'receipt.jpg', 'image/jpeg', 1024
+    );
+    const fileId = Number(res.lastInsertRowid);
+
+    const item = budget.createBudgetItem(trip.id, {
+      name: 'Restaurant with receipt',
+      total_price: 45,
+      receipt_file_ids: [fileId],
+    });
+
+    expect(item.receipts).toBeDefined();
+    expect(item.receipts!.length).toBe(1);
+    expect(item.receipts![0].id).toBe(fileId);
+    expect(item.receipts![0].original_name).toBe('receipt.jpg');
+
+    const listed = budget.listBudgetItems(trip.id);
+    const found = listed.find(i => i.id === item.id);
+    expect(found?.receipts?.length).toBe(1);
+    expect(found?.receipts?.[0].id).toBe(fileId);
+  });
+
+  it('updates receipts on updateBudgetItem, trashing orphans and keeping shared receipts', () => {
+    const { user: alice } = createUser(testDb);
+    const trip = createTrip(testDb, alice.id);
+
+    // File 1: will be removed and is orphan -> should be trashed
+    const f1 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'f1.jpg', 'f1.jpg').lastInsertRowid);
+    // File 2: will be kept
+    const f2 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'f2.jpg', 'f2.jpg').lastInsertRowid);
+    // File 3: will be added
+    const f3 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'f3.jpg', 'f3.jpg').lastInsertRowid);
+    // File 4: will be removed but is shared with another budget item -> should NOT be trashed
+    const f4 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'f4.jpg', 'f4.jpg').lastInsertRowid);
+
+    budget.createBudgetItem(trip.id, { name: 'Other', receipt_file_ids: [f4] });
+    const item = budget.createBudgetItem(trip.id, { name: 'Dinner', receipt_file_ids: [f1, f2, f4] });
+
+    // Update item: remove f1 and f4, keep f2, add f3
+    const updated = budget.updateBudgetItem(item.id, trip.id, { receipt_file_ids: [f2, f3] });
+    expect(updated?.receipts?.map(r => r.id).sort()).toEqual([f2, f3].sort());
+
+    // Check database state
+    const f1Row = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(f1) as { deleted_at: string | null };
+    expect(f1Row.deleted_at).not.toBeNull();
+
+    const f4Row = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(f4) as { deleted_at: string | null };
+    expect(f4Row.deleted_at).toBeNull();
+
+    const f2Row = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(f2) as { deleted_at: string | null };
+    expect(f2Row.deleted_at).toBeNull();
+  });
+
+  it('trashes orphan receipts on deleteBudgetItem, but preserves shared files', () => {
+    const { user: alice } = createUser(testDb);
+    const trip = createTrip(testDb, alice.id);
+
+    // File 1: orphan receipt
+    const f1 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'del1.jpg', 'del1.jpg').lastInsertRowid);
+    // File 2: linked to a place directly
+    const place = testDb.prepare('INSERT INTO places (trip_id, name) VALUES (?, ?)').run(trip.id, 'Hotel').lastInsertRowid;
+    const f2 = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name, place_id) VALUES (?, ?, ?, ?)').run(trip.id, 'del2.jpg', 'del2.jpg', place).lastInsertRowid);
+
+    const item = budget.createBudgetItem(trip.id, { name: 'Lunch', receipt_file_ids: [f1, f2] });
+    const deleted = budget.deleteBudgetItem(item.id, trip.id);
+    expect(deleted).toBe(true);
+
+    const f1Row = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(f1) as { deleted_at: string | null };
+    expect(f1Row.deleted_at).not.toBeNull();
+
+    const f2Row = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(f2) as { deleted_at: string | null };
+    expect(f2Row.deleted_at).toBeNull();
+
+    const linkRows = testDb.prepare('SELECT * FROM file_links WHERE budget_item_id = ?').all(item.id);
+    expect(linkRows).toHaveLength(0);
+  });
+
+  it('handles all branches of trashOrphanReceipt safely', () => {
+    const { user: alice } = createUser(testDb);
+    const trip = createTrip(testDb, alice.id);
+
+    // Branch 1: non-existent file or already deleted
+    const item = budget.createBudgetItem(trip.id, { name: 'BranchTest' });
+    expect(() => budget.updateBudgetItem(item.id, trip.id, { receipt_file_ids: [] })).not.toThrow();
+
+    // Branch 2: file linked to reservation
+    const resId = Number(testDb.prepare('INSERT INTO reservations (trip_id, title) VALUES (?, ?)').run(trip.id, 'Flight').lastInsertRowid);
+    const fRes = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name, reservation_id) VALUES (?, ?, ?, ?)').run(trip.id, 'res.pdf', 'res.pdf', resId).lastInsertRowid);
+    const item2 = budget.createBudgetItem(trip.id, { name: 'ResItem', receipt_file_ids: [fRes] });
+    budget.deleteBudgetItem(item2.id, trip.id);
+    const fResRow = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(fRes) as { deleted_at: string | null };
+    expect(fResRow.deleted_at).toBeNull();
+
+    // Branch 3: file linked via file_links to a place or assignment
+    const place2 = Number(testDb.prepare('INSERT INTO places (trip_id, name) VALUES (?, ?)').run(trip.id, 'Cafe').lastInsertRowid);
+    const fLink = Number(testDb.prepare('INSERT INTO trip_files (trip_id, filename, original_name) VALUES (?, ?, ?)').run(trip.id, 'link.pdf', 'link.pdf').lastInsertRowid);
+    testDb.prepare('INSERT INTO file_links (file_id, place_id) VALUES (?, ?)').run(fLink, place2);
+    const item3 = budget.createBudgetItem(trip.id, { name: 'LinkItem', receipt_file_ids: [fLink] });
+    budget.deleteBudgetItem(item3.id, trip.id);
+    const fLinkRow = testDb.prepare('SELECT deleted_at FROM trip_files WHERE id = ?').get(fLink) as { deleted_at: string | null };
+    expect(fLinkRow.deleted_at).toBeNull();
+  });
+});
diff --git a/server/tests/unit/nest/files.controller.test.ts b/server/tests/unit/nest/files.controller.test.ts
index f579bf874..47b539b2c 100644
--- a/server/tests/unit/nest/files.controller.test.ts
+++ b/server/tests/unit/nest/files.controller.test.ts
@@ -108,6 +108,25 @@ describe('FilesController (parity with the legacy /api/trips/:tripId/files route
       expect(await rejected(fc(fsvc({ can: vi.fn().mockReturnValue(false) })).upload(user, '5', withPath, {}))).toEqual({ status: 403, body: { error: 'No permission to upload files' } });
     });
 
+    it('passes budget_item_id to assertLinkTargets and createFile on upload, rejecting foreign targets', async () => {
+      const file = { filename: 'a.pdf' } as Express.Multer.File;
+      const rejectSvc = fsvc({ findForeignLinkTarget: vi.fn().mockReturnValue('budget_item_id') });
+      expect(await rejected(fc(rejectSvc).upload(user, '5', file, { budget_item_id: '99' }))).toEqual({
+        status: 400,
+        body: { error: 'Linked item does not belong to this trip' },
+      });
+
+      const createFile = vi.fn().mockReturnValue({ id: 10 });
+      const okSvc = fsvc({ createFile, broadcast: vi.fn() });
+      await fc(okSvc).upload(user, '5', file, { budget_item_id: '12' });
+      expect(createFile).toHaveBeenCalledWith('5', file, 1, {
+        place_id: undefined,
+        description: undefined,
+        reservation_id: undefined,
+        budget_item_id: '12',
+      });
+    });
+
     it('500 with cleanup when the storage commit fails', async () => {
       vi.mocked(storageStub.put).mockRejectedValueOnce(new Error('disk full'));
       const withPath = { filename: 'a.pdf', path: '/nonexistent/zzz.pdf' } as Express.Multer.File;
@@ -123,6 +142,31 @@ describe('FilesController (parity with the legacy /api/trips/:tripId/files route
     expect(fc(s).update(user, trip, '5', '9', { description: 'new' })).toEqual({ file: { id: 9 } });
   });
 
+  it('passes budget_item_id to assertLinkTargets and updateFile on update, rejecting foreign targets', () => {
+    const rejectSvc = fsvc({
+      getFileById: vi.fn().mockReturnValue({ id: 9 }),
+      findForeignLinkTarget: vi.fn().mockReturnValue('budget_item_id'),
+    });
+    expect(thrown(() => fc(rejectSvc).update(user, trip, '5', '9', { budget_item_id: '99' }))).toEqual({
+      status: 400,
+      body: { error: 'Linked item does not belong to this trip' },
+    });
+
+    const updateFile = vi.fn().mockReturnValue({ id: 9 });
+    const okSvc = fsvc({
+      getFileById: vi.fn().mockReturnValue({ id: 9 }),
+      updateFile,
+      broadcast: vi.fn(),
+    });
+    fc(okSvc).update(user, trip, '5', '9', { budget_item_id: '12' });
+    expect(updateFile).toHaveBeenCalledWith('9', { id: 9 }, {
+      description: undefined,
+      place_id: undefined,
+      reservation_id: undefined,
+      budget_item_id: '12',
+    });
+  });
+
   it('PATCH /:id/star 403/404, else toggles', () => {
     expect(thrown(() => fc(fsvc({ can: vi.fn().mockReturnValue(false) })).star(user, trip, '5', '9'))).toEqual({ status: 403, body: { error: 'No permission' } });
     expect(thrown(() => fc(fsvc({ getFileById: vi.fn().mockReturnValue(undefined) } as Partial<FilesService>)).star(user, trip, '5', '9'))).toEqual({ status: 404, body: { error: 'File not found' } });
diff --git a/shared/src/budget/budget.schema.ts b/shared/src/budget/budget.schema.ts
index cf137b705..4cb9febe2 100644
--- a/shared/src/budget/budget.schema.ts
+++ b/shared/src/budget/budget.schema.ts
@@ -97,10 +97,20 @@ export const budgetItemPayerSchema = z.object({
 });
 export type BudgetItemPayer = z.infer<typeof budgetItemPayerSchema>;
 
+export const budgetItemReceiptSchema = z.object({
+  id: z.number(),
+  filename: z.string(),
+  original_name: z.string(),
+  file_size: z.number().nullable().optional(),
+  mime_type: z.string().nullable().optional(),
+  url: z.string(),
+});
+export type BudgetItemReceipt = z.infer<typeof budgetItemReceiptSchema>;
+
 /**
  * Budget item entity as returned by the budget list/create/update endpoints
  * (server/src/services/budgetService.ts). Columns of the `budget_items` table
- * plus the embedded `members` (equal-split participants) and `payers` arrays.
+ * plus the embedded `members` (equal-split participants), `payers` and `receipts` arrays.
  * total_price is the sum of payer amounts in `currency`; `exchange_rate` converts
  * that to the trip base currency (NULL currency + rate 1 = base currency).
  */
@@ -127,6 +137,7 @@ export const budgetItemSchema = z.object({
   created_at: z.string().optional(),
   members: z.array(budgetItemMemberSchema).optional(),
   payers: z.array(budgetItemPayerSchema).optional(),
+  receipts: z.array(budgetItemReceiptSchema).optional(),
 });
 export type BudgetItem = z.infer<typeof budgetItemSchema>;
 
@@ -163,6 +174,8 @@ export const budgetCreateItemRequestSchema = z.object({
   // The same for a place: the place form's "add expense" flow saves the place
   // first, then creates the expense against it (#1298).
   place_id: z.number().optional(),
+  // Receipt files to link to this expense
+  receipt_file_ids: z.array(z.number()).optional(),
 });
 export type BudgetCreateItemRequest = z.infer<typeof budgetCreateItemRequestSchema>;
 
@@ -181,6 +194,7 @@ export const budgetUpdateItemRequestSchema = z.object({
   note: z.string().nullable().optional(),
   ticket_json: z.string().nullable().optional(),
   expense_date: z.string().nullable().optional(),
+  receipt_file_ids: z.array(z.number()).optional(),
 });
 export type BudgetUpdateItemRequest = z.infer<typeof budgetUpdateItemRequestSchema>;
 
diff --git a/shared/src/file/file.schema.ts b/shared/src/file/file.schema.ts
index 253a2ea16..7dcb4a4fd 100644
--- a/shared/src/file/file.schema.ts
+++ b/shared/src/file/file.schema.ts
@@ -22,6 +22,7 @@ export const fileUploadRequestSchema = z.object({
   place_id: z.string().optional(),
   description: z.string().optional(),
   reservation_id: z.string().optional(),
+  budget_item_id: z.string().optional(),
 });
 export type FileUploadRequest = z.infer<typeof fileUploadRequestSchema>;
 
@@ -29,6 +30,7 @@ export const fileUpdateRequestSchema = z.object({
   description: z.string().optional(),
   place_id: nullableIdField,
   reservation_id: nullableIdField,
+  budget_item_id: nullableIdField,
 });
 export type FileUpdateRequest = z.infer<typeof fileUpdateRequestSchema>;
 
@@ -36,6 +38,7 @@ export const fileLinkRequestSchema = z.object({
   reservation_id: nullableIdField,
   assignment_id: nullableIdField,
   place_id: nullableIdField,
+  budget_item_id: nullableIdField,
 });
 export type FileLinkRequest = z.infer<typeof fileLinkRequestSchema>;
 
diff --git a/shared/src/i18n/ar/budget.ts b/shared/src/i18n/ar/budget.ts
index 04a87a911..72af305c0 100644
--- a/shared/src/i18n/ar/budget.ts
+++ b/shared/src/i18n/ar/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'مجموع الحصص: {sum} من {total} (ناقص {diff})',
   'costs.splitSumOver': 'مجموع الحصص: {sum} من {total} (زائد {diff})',
   'costs.toggleSign': 'التبديل بين المصروف والاسترداد',
+  'costs.receipts': 'الإيصالات',
+  'costs.receiptsTitle': 'الإيصالات والفواتير',
+  'costs.attachReceipt': 'إرفاق إيصال / فاتورة',
+  'costs.noReceipts': 'لا توجد إيصالات مرفقة',
+  'costs.deleteReceipt': 'حذف الإيصال',
+  'costs.viewReceipt': 'عرض الإيصال',
 };
 export default budget;
diff --git a/shared/src/i18n/br/budget.ts b/shared/src/i18n/br/budget.ts
index 13237225b..f00244d8b 100644
--- a/shared/src/i18n/br/budget.ts
+++ b/shared/src/i18n/br/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Soma das partes: {sum} de {total} (faltam {diff})',
   'costs.splitSumOver': 'Soma das partes: {sum} de {total} (sobram {diff})',
   'costs.toggleSign': 'Alternar entre despesa e reembolso',
+  'costs.receipts': 'Comprovantes',
+  'costs.receiptsTitle': 'Comprovantes e notas',
+  'costs.attachReceipt': 'Anexar comprovante / nota',
+  'costs.noReceipts': 'Nenhum comprovante anexado',
+  'costs.deleteReceipt': 'Remover comprovante',
+  'costs.viewReceipt': 'Ver comprovante',
 };
 export default budget;
diff --git a/shared/src/i18n/ca/budget.ts b/shared/src/i18n/ca/budget.ts
index 627b11ab0..7beeebaf5 100644
--- a/shared/src/i18n/ca/budget.ts
+++ b/shared/src/i18n/ca/budget.ts
@@ -147,6 +147,12 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Suma de les parts: {sum} de {total} (en falten {diff})',
   'costs.splitSumOver': 'Suma de les parts: {sum} de {total} ({diff} de més)',
   'costs.toggleSign': 'Alterna entre despesa i devolució',
+  'costs.receipts': 'Rebuts',
+  'costs.receiptsTitle': 'Rebuts i factures',
+  'costs.attachReceipt': 'Adjuntar rebut / factura',
+  'costs.noReceipts': 'Cap rebut adjunt',
+  'costs.deleteReceipt': 'Eliminar rebut',
+  'costs.viewReceipt': 'Veure rebut',
 };
 
 export default budget;
diff --git a/shared/src/i18n/cs/budget.ts b/shared/src/i18n/cs/budget.ts
index 7e905f021..50b4692fb 100644
--- a/shared/src/i18n/cs/budget.ts
+++ b/shared/src/i18n/cs/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Součet podílů: {sum} z {total} (chybí {diff})',
   'costs.splitSumOver': 'Součet podílů: {sum} z {total} (o {diff} více)',
   'costs.toggleSign': 'Přepnout mezi výdajem a vratkou',
+  'costs.receipts': 'Účtenky',
+  'costs.receiptsTitle': 'Účtenky a faktury',
+  'costs.attachReceipt': 'Připojit účtenku / fakturu',
+  'costs.noReceipts': 'Žádné připojené účtenky',
+  'costs.deleteReceipt': 'Odebrat účtenku',
+  'costs.viewReceipt': 'Zobrazit účtenku',
 };
 export default budget;
diff --git a/shared/src/i18n/de/budget.ts b/shared/src/i18n/de/budget.ts
index f1014fdcd..e6fba4b6e 100644
--- a/shared/src/i18n/de/budget.ts
+++ b/shared/src/i18n/de/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Summe der Anteile: {sum} von {total} (es fehlen {diff})',
   'costs.splitSumOver': 'Summe der Anteile: {sum} von {total} ({diff} zu viel)',
   'costs.toggleSign': 'Zwischen Ausgabe und Erstattung wechseln',
+  'costs.receipts': 'Belege',
+  'costs.receiptsTitle': 'Belege & Rechnungen',
+  'costs.attachReceipt': 'Beleg / Rechnung anhängen',
+  'costs.noReceipts': 'Keine Belege angehängt',
+  'costs.deleteReceipt': 'Beleg entfernen',
+  'costs.viewReceipt': 'Beleg ansehen',
 };
 export default budget;
diff --git a/shared/src/i18n/en/budget.ts b/shared/src/i18n/en/budget.ts
index c2b4297d3..9a30466de 100644
--- a/shared/src/i18n/en/budget.ts
+++ b/shared/src/i18n/en/budget.ts
@@ -147,6 +147,12 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Sum of splits: {sum} of {total} (under by {diff})',
   'costs.splitSumOver': 'Sum of splits: {sum} of {total} (over by {diff})',
   'costs.toggleSign': 'Switch between expense and refund',
+  'costs.receipts': 'Receipts',
+  'costs.receiptsTitle': 'Receipts & Invoices',
+  'costs.attachReceipt': 'Attach receipt / invoice',
+  'costs.noReceipts': 'No receipts attached',
+  'costs.deleteReceipt': 'Remove receipt',
+  'costs.viewReceipt': 'View receipt',
 };
 
 export default budget;
diff --git a/shared/src/i18n/es/budget.ts b/shared/src/i18n/es/budget.ts
index 27e8c9d2b..fa33e6e7c 100644
--- a/shared/src/i18n/es/budget.ts
+++ b/shared/src/i18n/es/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Suma de las partes: {sum} de {total} (faltan {diff})',
   'costs.splitSumOver': 'Suma de las partes: {sum} de {total} (sobran {diff})',
   'costs.toggleSign': 'Cambiar entre gasto y reembolso',
+  'costs.receipts': 'Recibos',
+  'costs.receiptsTitle': 'Recibos y facturas',
+  'costs.attachReceipt': 'Adjuntar recibo / factura',
+  'costs.noReceipts': 'No hay recibos adjuntos',
+  'costs.deleteReceipt': 'Eliminar recibo',
+  'costs.viewReceipt': 'Ver recibo',
 };
 export default budget;
diff --git a/shared/src/i18n/fr/budget.ts b/shared/src/i18n/fr/budget.ts
index 053a3740b..687e8cd2f 100644
--- a/shared/src/i18n/fr/budget.ts
+++ b/shared/src/i18n/fr/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Somme des parts : {sum} sur {total} (il manque {diff})',
   'costs.splitSumOver': 'Somme des parts : {sum} sur {total} ({diff} de trop)',
   'costs.toggleSign': 'Basculer entre dépense et remboursement',
+  'costs.receipts': 'Reçus',
+  'costs.receiptsTitle': 'Reçus et factures',
+  'costs.attachReceipt': 'Joindre un reçu / une facture',
+  'costs.noReceipts': 'Aucun reçu joint',
+  'costs.deleteReceipt': 'Supprimer le reçu',
+  'costs.viewReceipt': 'Voir le reçu',
 };
 export default budget;
diff --git a/shared/src/i18n/gr/budget.ts b/shared/src/i18n/gr/budget.ts
index 112a8c5d0..774f387bd 100644
--- a/shared/src/i18n/gr/budget.ts
+++ b/shared/src/i18n/gr/budget.ts
@@ -148,5 +148,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Άθροισμα μεριδίων: {sum} από {total} (λείπουν {diff})',
   'costs.splitSumOver': 'Άθροισμα μεριδίων: {sum} από {total} ({diff} παραπάνω)',
   'costs.toggleSign': 'Εναλλαγή μεταξύ εξόδου και επιστροφής',
+  'costs.receipts': 'Αποδείξεις',
+  'costs.receiptsTitle': 'Αποδείξεις & Τιμολόγια',
+  'costs.attachReceipt': 'Επισύναψη απόδειξης / τιμολογίου',
+  'costs.noReceipts': 'Δεν υπάρχουν συνημμένες αποδείξεις',
+  'costs.deleteReceipt': 'Αφαίρεση απόδειξης',
+  'costs.viewReceipt': 'Προβολή απόδειξης',
 };
 export default budget;
diff --git a/shared/src/i18n/hu/budget.ts b/shared/src/i18n/hu/budget.ts
index a6c3c3941..7f401e458 100644
--- a/shared/src/i18n/hu/budget.ts
+++ b/shared/src/i18n/hu/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'A részek összege: {sum} / {total} (hiányzik {diff})',
   'costs.splitSumOver': 'A részek összege: {sum} / {total} ({diff} a többlet)',
   'costs.toggleSign': 'Váltás kiadás és visszatérítés között',
+  'costs.receipts': 'Nyugták',
+  'costs.receiptsTitle': 'Nyugták és számlák',
+  'costs.attachReceipt': 'Nyugta / számla csatolása',
+  'costs.noReceipts': 'Nincsenek csatolt nyugták',
+  'costs.deleteReceipt': 'Nyugta eltávolítása',
+  'costs.viewReceipt': 'Nyugta megtekintése',
 };
 export default budget;
diff --git a/shared/src/i18n/id/budget.ts b/shared/src/i18n/id/budget.ts
index 5839653b9..a7682d857 100644
--- a/shared/src/i18n/id/budget.ts
+++ b/shared/src/i18n/id/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Jumlah bagian: {sum} dari {total} (kurang {diff})',
   'costs.splitSumOver': 'Jumlah bagian: {sum} dari {total} (lebih {diff})',
   'costs.toggleSign': 'Beralih antara pengeluaran dan pengembalian dana',
+  'costs.receipts': 'Kuitansi',
+  'costs.receiptsTitle': 'Kuitansi & Faktur',
+  'costs.attachReceipt': 'Lampirkan kuitansi / faktur',
+  'costs.noReceipts': 'Tidak ada kuitansi terlampir',
+  'costs.deleteReceipt': 'Hapus kuitansi',
+  'costs.viewReceipt': 'Lihat kuitansi',
 };
 export default budget;
diff --git a/shared/src/i18n/it/budget.ts b/shared/src/i18n/it/budget.ts
index 72c6f0b01..ba8fde2f6 100644
--- a/shared/src/i18n/it/budget.ts
+++ b/shared/src/i18n/it/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Somma delle quote: {sum} di {total} (mancano {diff})',
   'costs.splitSumOver': 'Somma delle quote: {sum} di {total} ({diff} in più)',
   'costs.toggleSign': 'Passa da spesa a rimborso',
+  'costs.receipts': 'Ricevute',
+  'costs.receiptsTitle': 'Ricevute e fatture',
+  'costs.attachReceipt': 'Allega ricevuta / fattura',
+  'costs.noReceipts': 'Nessuna ricevuta allegata',
+  'costs.deleteReceipt': 'Rimuovi ricevuta',
+  'costs.viewReceipt': 'Visualizza ricevuta',
 };
 export default budget;
diff --git a/shared/src/i18n/ja/budget.ts b/shared/src/i18n/ja/budget.ts
index 2cdcec980..7167303d8 100644
--- a/shared/src/i18n/ja/budget.ts
+++ b/shared/src/i18n/ja/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': '分割の合計: {total} のうち {sum}（{diff} 不足）',
   'costs.splitSumOver': '分割の合計: {total} のうち {sum}（{diff} 超過）',
   'costs.toggleSign': '支出と返金を切り替える',
+  'costs.receipts': 'レシート',
+  'costs.receiptsTitle': 'レシート・請求書',
+  'costs.attachReceipt': 'レシート・請求書を添付',
+  'costs.noReceipts': '添付されたレシートはありません',
+  'costs.deleteReceipt': 'レシートを削除',
+  'costs.viewReceipt': 'レシートを表示',
 };
 export default budget;
diff --git a/shared/src/i18n/ko/budget.ts b/shared/src/i18n/ko/budget.ts
index 9c9c3a2e5..e5eb255ac 100644
--- a/shared/src/i18n/ko/budget.ts
+++ b/shared/src/i18n/ko/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': '분할 합계: {total} 중 {sum} ({diff} 부족)',
   'costs.splitSumOver': '분할 합계: {total} 중 {sum} ({diff} 초과)',
   'costs.toggleSign': '지출과 환불 전환',
+  'costs.receipts': '영수증',
+  'costs.receiptsTitle': '영수증 및 청구서',
+  'costs.attachReceipt': '영수증 / 청구서 첨부',
+  'costs.noReceipts': '첨부된 영수증 없음',
+  'costs.deleteReceipt': '영수증 삭제',
+  'costs.viewReceipt': '영수증 보기',
 };
 export default budget;
diff --git a/shared/src/i18n/nl/budget.ts b/shared/src/i18n/nl/budget.ts
index 4f912c182..865f0e5f9 100644
--- a/shared/src/i18n/nl/budget.ts
+++ b/shared/src/i18n/nl/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Som van de delen: {sum} van {total} ({diff} te weinig)',
   'costs.splitSumOver': 'Som van de delen: {sum} van {total} ({diff} te veel)',
   'costs.toggleSign': 'Wisselen tussen uitgave en terugbetaling',
+  'costs.receipts': 'Bonnetjes',
+  'costs.receiptsTitle': 'Bonnetjes & facturen',
+  'costs.attachReceipt': 'Bon / factuur bijvoegen',
+  'costs.noReceipts': 'Geen bonnetjes bijgevoegd',
+  'costs.deleteReceipt': 'Bonnetje verwijderen',
+  'costs.viewReceipt': 'Bonnetje bekijken',
 };
 export default budget;
diff --git a/shared/src/i18n/pl/budget.ts b/shared/src/i18n/pl/budget.ts
index 301274eb2..8d3de5f49 100644
--- a/shared/src/i18n/pl/budget.ts
+++ b/shared/src/i18n/pl/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Suma podziałów: {sum} z {total} (brakuje {diff})',
   'costs.splitSumOver': 'Suma podziałów: {sum} z {total} (o {diff} za dużo)',
   'costs.toggleSign': 'Przełącz między wydatkiem a zwrotem',
+  'costs.receipts': 'Paragony',
+  'costs.receiptsTitle': 'Paragony i faktury',
+  'costs.attachReceipt': 'Załącz paragon / fakturę',
+  'costs.noReceipts': 'Brak załączonych paragonów',
+  'costs.deleteReceipt': 'Usuń paragon',
+  'costs.viewReceipt': 'Zobacz paragon',
 };
 export default budget;
diff --git a/shared/src/i18n/ru/budget.ts b/shared/src/i18n/ru/budget.ts
index b715b1a4e..5e51babf9 100644
--- a/shared/src/i18n/ru/budget.ts
+++ b/shared/src/i18n/ru/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Сумма долей: {sum} из {total} (не хватает {diff})',
   'costs.splitSumOver': 'Сумма долей: {sum} из {total} (больше на {diff})',
   'costs.toggleSign': 'Переключить между расходом и возвратом',
+  'costs.receipts': 'Чеки',
+  'costs.receiptsTitle': 'Чеки и счета',
+  'costs.attachReceipt': 'Прикрепить чек / счет',
+  'costs.noReceipts': 'Нет прикрепленных чеков',
+  'costs.deleteReceipt': 'Удалить чек',
+  'costs.viewReceipt': 'Просмотреть чек',
 };
 export default budget;
diff --git a/shared/src/i18n/sv/budget.ts b/shared/src/i18n/sv/budget.ts
index fd3c1a8fe..4af21318a 100644
--- a/shared/src/i18n/sv/budget.ts
+++ b/shared/src/i18n/sv/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Summan av delarna: {sum} av {total} ({diff} saknas)',
   'costs.splitSumOver': 'Summan av delarna: {sum} av {total} ({diff} för mycket)',
   'costs.toggleSign': 'Växla mellan utgift och återbetalning',
+  'costs.receipts': 'Kvitton',
+  'costs.receiptsTitle': 'Kvitton & fakturor',
+  'costs.attachReceipt': 'Bifoga kvitto / faktura',
+  'costs.noReceipts': 'Inga bifogade kvitton',
+  'costs.deleteReceipt': 'Ta bort kvitto',
+  'costs.viewReceipt': 'Visa kvitto',
 };
 export default budget;
diff --git a/shared/src/i18n/tr/budget.ts b/shared/src/i18n/tr/budget.ts
index 4434b721a..794485754 100644
--- a/shared/src/i18n/tr/budget.ts
+++ b/shared/src/i18n/tr/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Payların toplamı: {total} tutarın {sum} kadarı ({diff} eksik)',
   'costs.splitSumOver': 'Payların toplamı: {total} tutarın {sum} kadarı ({diff} fazla)',
   'costs.toggleSign': 'Gider ve iade arasında geçiş yap',
+  'costs.receipts': 'Fişler',
+  'costs.receiptsTitle': 'Fişler ve Faturalar',
+  'costs.attachReceipt': 'Fiş / fatura ekle',
+  'costs.noReceipts': 'Ekli fiş yok',
+  'costs.deleteReceipt': 'Fişi kaldır',
+  'costs.viewReceipt': 'Fişi görüntüle',
 };
 export default budget;
diff --git a/shared/src/i18n/uk/budget.ts b/shared/src/i18n/uk/budget.ts
index 0f1d28ef5..f58b25d47 100644
--- a/shared/src/i18n/uk/budget.ts
+++ b/shared/src/i18n/uk/budget.ts
@@ -147,5 +147,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Сума часток: {sum} з {total} (бракує {diff})',
   'costs.splitSumOver': 'Сума часток: {sum} з {total} (більше на {diff})',
   'costs.toggleSign': 'Перемкнути між витратою та поверненням',
+  'costs.receipts': 'Чеки',
+  'costs.receiptsTitle': 'Чеки та рахунки',
+  'costs.attachReceipt': 'Додати чек / рахунок',
+  'costs.noReceipts': 'Немає доданих чеків',
+  'costs.deleteReceipt': 'Видалити чек',
+  'costs.viewReceipt': 'Переглянути чек',
 };
 export default budget;
diff --git a/shared/src/i18n/vi/budget.ts b/shared/src/i18n/vi/budget.ts
index 2bbed30da..a0eadaef1 100644
--- a/shared/src/i18n/vi/budget.ts
+++ b/shared/src/i18n/vi/budget.ts
@@ -147,6 +147,12 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': 'Tổng các phần: {sum} trên {total} (thiếu {diff})',
   'costs.splitSumOver': 'Tổng các phần: {sum} trên {total} (thừa {diff})',
   'costs.toggleSign': 'Chuyển giữa khoản chi và khoản hoàn',
+  'costs.receipts': 'Hóa đơn',
+  'costs.receiptsTitle': 'Hóa đơn & Biên lai',
+  'costs.attachReceipt': 'Đính kèm hóa đơn / biên lai',
+  'costs.noReceipts': 'Chưa đính kèm hóa đơn nào',
+  'costs.deleteReceipt': 'Xóa hóa đơn',
+  'costs.viewReceipt': 'Xem hóa đơn',
 };
 
 export default budget;
diff --git a/shared/src/i18n/zh-TW/budget.ts b/shared/src/i18n/zh-TW/budget.ts
index 022ca52d1..3cc3dc2ac 100644
--- a/shared/src/i18n/zh-TW/budget.ts
+++ b/shared/src/i18n/zh-TW/budget.ts
@@ -146,5 +146,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': '分攤合計：{total} 中的 {sum}（少 {diff}）',
   'costs.splitSumOver': '分攤合計：{total} 中的 {sum}（多 {diff}）',
   'costs.toggleSign': '在支出與退款之間切換',
+  'costs.receipts': '收據',
+  'costs.receiptsTitle': '收據與發票',
+  'costs.attachReceipt': '附加收據/發票',
+  'costs.noReceipts': '未附加收據',
+  'costs.deleteReceipt': '刪除收據',
+  'costs.viewReceipt': '查看收據',
 };
 export default budget;
diff --git a/shared/src/i18n/zh/budget.ts b/shared/src/i18n/zh/budget.ts
index e9f54991b..ea699e533 100644
--- a/shared/src/i18n/zh/budget.ts
+++ b/shared/src/i18n/zh/budget.ts
@@ -146,5 +146,11 @@ const budget: TranslationStrings = {
   'costs.splitSumUnder': '分摊合计：{total} 中的 {sum}（少 {diff}）',
   'costs.splitSumOver': '分摊合计：{total} 中的 {sum}（多 {diff}）',
   'costs.toggleSign': '在支出和退款之间切换',
+  'costs.receipts': '收据',
+  'costs.receiptsTitle': '收据与发票',
+  'costs.attachReceipt': '附加收据/发票',
+  'costs.noReceipts': '未附加收据',
+  'costs.deleteReceipt': '删除收据',
+  'costs.viewReceipt': '查看收据',
 };
 export default budget;