diff --git a/src/utils/backup.js b/src/utils/backup.js
index 1cbf371..dafe109 100644
--- a/src/utils/backup.js
+++ b/src/utils/backup.js
@@ -55,11 +55,11 @@ export async function exportBackup() {
 
   add('내역', entries.map((e) => ({
     날짜: e.entryDate, 구분: e.type, 분류: e.category, 금액: e.amount, 메모: e.memo,
-    계좌: e.walletName, 입금계좌: e.toWalletName, 할부개월: e.installmentMonths,
-    태그: (e.tags || []).join(','),
+    계좌: e.walletName, 계좌ID: e.walletId, 입금계좌: e.toWalletName, 입금계좌ID: e.toWalletId,
+    할부개월: e.installmentMonths, 태그: (e.tags || []).join(','),
   })))
   add('계좌', wallets.map((w) => ({
-    종류: w.type, 이름: w.name, '은행/카드사': w.issuer, 계좌번호: w.accountNumber,
+    ID: w.id, 종류: w.type, 이름: w.name, '은행/카드사': w.issuer, 계좌번호: w.accountNumber,
     카드유형: w.cardType, 개시잔액: w.openingBalance, 개시일: w.openingDate, '평가액(수동)': w.currentValue,
   })))
   add('분류', categories.map((c) => ({
@@ -67,7 +67,7 @@ export async function exportBackup() {
   })))
   add('고정지출', recurrings.map((r) => ({
     제목: r.title, 구분: r.type, 금액: r.amount, 분류: r.category, 메모: r.memo,
-    계좌: r.walletName, 입금계좌: r.toWalletName, 주기: r.frequency,
+    계좌: r.walletName, 계좌ID: r.walletId, 입금계좌: r.toWalletName, 입금계좌ID: r.toWalletId, 주기: r.frequency,
     일: r.dayOfMonth, 요일: r.dayOfWeek, 월: r.monthOfYear,
     시작일: r.startDate, 종료일: r.endDate, 활성: r.active,
   })))
@@ -77,7 +77,7 @@ export async function exportBackup() {
   })))
   add('태그', tags.map((t) => ({ 이름: t.name })))
   add('자주쓰는내역', quick.map((q) => ({
-    라벨: q.label, 구분: q.type, 분류: q.category, 금액: q.amount, 메모: q.memo, 계좌: q.walletName,
+    라벨: q.label, 구분: q.type, 분류: q.category, 금액: q.amount, 메모: q.memo, 계좌: q.walletName, 계좌ID: q.walletId,
   })))
 
   await saveWorkbook(XLSX, wb, fileName())
@@ -108,7 +108,7 @@ export async function importBackup(file) {
   const payload = {
     wallets: rows('계좌')
       .map((r) => ({
-        type: str(r['종류']), name: str(r['이름']), issuer: str(r['은행/카드사']),
+        oldId: num(r['ID']), type: str(r['종류']), name: str(r['이름']), issuer: str(r['은행/카드사']),
         accountNumber: str(r['계좌번호']), cardType: str(r['카드유형']),
         openingBalance: num(r['개시잔액']), openingDate: date(r['개시일']), currentValue: num(r['평가액(수동)']),
       }))
@@ -120,7 +120,7 @@ export async function importBackup(file) {
     entries: rows('내역')
       .map((r) => ({
         entryDate: date(r['날짜']), type: str(r['구분']), category: str(r['분류']),
-        amount: num(r['금액']), memo: str(r['메모']), wallet: str(r['계좌']), toWallet: str(r['입금계좌']),
+        amount: num(r['금액']), memo: str(r['메모']), walletId: num(r['계좌ID']), toWalletId: num(r['입금계좌ID']),
         installmentMonths: num(r['할부개월']),
         tags: str(r['태그']) ? String(r['태그']).split(',').map((s) => s.trim()).filter(Boolean) : [],
       }))
@@ -128,7 +128,7 @@ export async function importBackup(file) {
     recurrings: rows('고정지출')
       .map((r) => ({
         title: str(r['제목']), type: str(r['구분']), amount: num(r['금액']), category: str(r['분류']), memo: str(r['메모']),
-        wallet: str(r['계좌']), toWallet: str(r['입금계좌']), frequency: str(r['주기']),
+        walletId: num(r['계좌ID']), toWalletId: num(r['입금계좌ID']), frequency: str(r['주기']),
         dayOfMonth: num(r['일']), dayOfWeek: num(r['요일']), monthOfYear: num(r['월']),
         startDate: date(r['시작일']), endDate: date(r['종료일']), active: bool(r['활성']),
       }))
@@ -142,7 +142,7 @@ export async function importBackup(file) {
     quickEntries: rows('자주쓰는내역')
       .map((r) => ({
         label: str(r['라벨']), type: str(r['구분']), category: str(r['분류']),
-        amount: num(r['금액']), memo: str(r['메모']), wallet: str(r['계좌']),
+        amount: num(r['금액']), memo: str(r['메모']), walletId: num(r['계좌ID']),
       }))
       .filter((q) => q.type),
   }