diff --git a/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/repository/AttendanceRepository.java b/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/repository/AttendanceRepository.java
index 938c8af..5de470f 100644
--- a/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/repository/AttendanceRepository.java
+++ b/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/repository/AttendanceRepository.java
@@ -21,4 +21,6 @@ public interface AttendanceRepository extends JpaRepository<Attendance, Long> {
     // 특정 날짜와 차수에 대한 모든 출석 기록 조회
     List<Attendance> findByDateAndOrder(LocalDate date, int order);
 
+    // 보증금
+    List<Attendance> findByDateAndOrderAndStatusFalse(LocalDate date, int order);
 }
diff --git a/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/service/AttendanceService.java b/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/service/AttendanceService.java
index 927411d..b1ffe29 100644
--- a/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/service/AttendanceService.java
+++ b/backend/pirocheck/src/main/java/backend/pirocheck/Attendance/service/AttendanceService.java
@@ -125,7 +125,13 @@ public String expireAttendanceCode(String code) {
         attendanceCode.setExpired(true);
         attendanceCodeRepository.save(attendanceCode);
 
+        // 보증금
+        List<Attendance> absents = attendanceRepository.findByDateAndOrderAndStatusFalse(
+                attendanceCode.getDate(), attendanceCode.getOrder());
 
+        for (Attendance attendance : absents) {
+            depositService.recalculateDeposit(attendance.getUser().getId());
+        }
         return "출석 코드가 성공적으로 만료되었습니다";
     }