diff --git a/src/components/TransactionCard.tsx b/src/components/TransactionCard.tsx
index b4a0fa6..dc0b174 100644
--- a/src/components/TransactionCard.tsx
+++ b/src/components/TransactionCard.tsx
@@ -13,6 +13,7 @@ export type Transaction = {
   date: string;
   category: string;
   type: 'expense' | 'income';
+  notes?: string; // notes 필드를 옵셔널로 추가
 };
 
 interface TransactionCardProps {
diff --git a/src/contexts/budget/types.ts b/src/contexts/budget/types.ts
index e937801..420a919 100644
--- a/src/contexts/budget/types.ts
+++ b/src/contexts/budget/types.ts
@@ -40,4 +40,5 @@ export interface Transaction {
   date: string;
   category: string;
   type: 'income' | 'expense';
+  notes?: string; // notes 필드를 옵셔널로 추가
 }
diff --git a/src/hooks/useTransactions.ts b/src/hooks/useTransactions.ts
index 417c964..1740c4b 100644
--- a/src/hooks/useTransactions.ts
+++ b/src/hooks/useTransactions.ts
@@ -38,7 +38,7 @@ const createSampleTransactions = (month: string): Transaction[] => {
       amount: 35000,
       category: '식비',
       date: `${monthIndex + 1}월 10일, ${year}`,
-      notes: '주간 장보기'
+      type: 'expense'
     },
     {
       id: 'sample-2',
@@ -46,7 +46,7 @@ const createSampleTransactions = (month: string): Transaction[] => {
       amount: 20000,
       category: '교통비',
       date: `${monthIndex + 1}월 5일, ${year}`,
-      notes: '월간 교통비'
+      type: 'expense'
     }
   ];
 };