diff --git a/src/main/java/com/bbteam/budgetbuddies/domain/expense/converter/ExpenseConverter.java b/src/main/java/com/bbteam/budgetbuddies/domain/expense/converter/ExpenseConverter.java
index 23b1790e..d4353d6d 100644
--- a/src/main/java/com/bbteam/budgetbuddies/domain/expense/converter/ExpenseConverter.java
+++ b/src/main/java/com/bbteam/budgetbuddies/domain/expense/converter/ExpenseConverter.java
@@ -59,6 +59,7 @@ private CompactExpenseResponseDto toExpenseCompactResponseDto(Expense expense) {
 			.description(expense.getDescription())
 			.amount(expense.getAmount())
 			.expenseDate(expense.getExpenseDate())
+			.categoryId(expense.getCategory().getId())
 			.build();
 	}
 }
diff --git a/src/main/java/com/bbteam/budgetbuddies/domain/expense/dto/CompactExpenseResponseDto.java b/src/main/java/com/bbteam/budgetbuddies/domain/expense/dto/CompactExpenseResponseDto.java
index f40b7c24..0983666e 100644
--- a/src/main/java/com/bbteam/budgetbuddies/domain/expense/dto/CompactExpenseResponseDto.java
+++ b/src/main/java/com/bbteam/budgetbuddies/domain/expense/dto/CompactExpenseResponseDto.java
@@ -18,6 +18,7 @@ public class CompactExpenseResponseDto {
 	private Long expenseId;
 	private String description;
 	private Long amount;
+	private Long categoryId;
 
 	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Seoul")
 	private LocalDateTime expenseDate;
diff --git a/src/main/java/com/bbteam/budgetbuddies/domain/user/controller/UserController.java b/src/main/java/com/bbteam/budgetbuddies/domain/user/controller/UserController.java
index 0fa1e210..6d49ba8b 100644
--- a/src/main/java/com/bbteam/budgetbuddies/domain/user/controller/UserController.java
+++ b/src/main/java/com/bbteam/budgetbuddies/domain/user/controller/UserController.java
@@ -31,7 +31,7 @@ public ApiResponse<UserDto.ResponseUserDto> registerUser(@RequestBody UserDto.Re
         return ApiResponse.onSuccess(userService.saveUser(dto));
     }
 
-    @GetMapping("/find/{userid}")
+    @GetMapping("/find/{userId}")
     public ApiResponse<UserDto.ResponseUserDto> findOne(@PathVariable("userId") @ExistUser Long userId) {
         return ApiResponse.onSuccess(userService.findUser(userId));
     }
diff --git a/src/test/java/com/bbteam/budgetbuddies/domain/expense/service/ExpenseServiceImplTest.java b/src/test/java/com/bbteam/budgetbuddies/domain/expense/service/ExpenseServiceImplTest.java
index 11ecbf07..f0f5c05f 100644
--- a/src/test/java/com/bbteam/budgetbuddies/domain/expense/service/ExpenseServiceImplTest.java
+++ b/src/test/java/com/bbteam/budgetbuddies/domain/expense/service/ExpenseServiceImplTest.java
@@ -66,6 +66,7 @@ void getMonthlyExpense_Success() {
 		given(userRepository.findById(user.getId())).willReturn(Optional.of(user));
 
 		Category userCategory = Mockito.spy(Category.builder().build());
+		given(userCategory.getId()).willReturn(-1L);
 
 		LocalDate requestMonth = LocalDate.of(2024, 07, 8);
 		Pageable requestPage = PageRequest.of(0, pageSize);
@@ -120,6 +121,7 @@ private List<CompactExpenseResponseDto> generateCompactExpenseResponseList(Local
 				.expenseId((long)-i)
 				.expenseDate(month.withDayOfMonth(i).atStartOfDay())
 				.amount(i * 100000L)
+				.categoryId(-1L)
 				.build());
 		}
 		return compactExpenses;