diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 17011b0..de4ed6a 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -1,6 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.READ_SMS" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.VIBRATE" />
     <!-- 재부팅 후 예약 복구를 위해 필요 -->
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <!-- 정확 알람(결제/캘린더 등 정확 시각 필요시) 사용 -->
@@ -40,6 +41,20 @@
         <meta-data
             android:name="com.google.android.gms.ads.APPLICATION_ID"
             android:value="ca-app-pub-6691216385521068~6638409932" />
+
+        <receiver
+            android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver"
+            android:exported="false" />
+        <receiver
+            android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
+                <action android:name="android.intent.action.QUICKBOOT_POWERON" />
+                <action android:name="com.htc.intent.action.QUICKBOOT_POWERON" />
+            </intent-filter>
+        </receiver>
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and
diff --git a/lib/controllers/add_subscription_controller.dart b/lib/controllers/add_subscription_controller.dart
index 9bdbecf..2469396 100644
--- a/lib/controllers/add_subscription_controller.dart
+++ b/lib/controllers/add_subscription_controller.dart
@@ -9,7 +9,6 @@ import '../services/subscription_url_matcher.dart';
 import '../widgets/common/snackbar/app_snackbar.dart';
 import '../l10n/app_localizations.dart';
 import '../utils/billing_date_util.dart';
-import '../utils/business_day_util.dart';
 import 'package:permission_handler/permission_handler.dart' as permission;
 
 /// AddSubscriptionScreen의 비즈니스 로직을 관리하는 Controller
@@ -495,7 +494,6 @@ class AddSubscriptionController {
         );
         var adjustedNext =
             BillingDateUtil.ensureFutureDate(originalDateOnly, billingCycle);
-        adjustedNext = BusinessDayUtil.nextBusinessDay(adjustedNext);
 
         await Provider.of<SubscriptionProvider>(context, listen: false)
             .addSubscription(
diff --git a/lib/controllers/detail_screen_controller.dart b/lib/controllers/detail_screen_controller.dart
index 7f24e60..11ca135 100644
--- a/lib/controllers/detail_screen_controller.dart
+++ b/lib/controllers/detail_screen_controller.dart
@@ -13,7 +13,6 @@ import '../widgets/dialogs/delete_confirmation_dialog.dart';
 import '../widgets/common/snackbar/app_snackbar.dart';
 import '../l10n/app_localizations.dart';
 import '../utils/billing_date_util.dart';
-import '../utils/business_day_util.dart';
 
 /// DetailScreen의 비즈니스 로직을 관리하는 Controller
 class DetailScreenController extends ChangeNotifier {
@@ -414,8 +413,6 @@ class DetailScreenController extends ChangeNotifier {
         _nextBillingDate.year, _nextBillingDate.month, _nextBillingDate.day);
     var adjustedNext =
         BillingDateUtil.ensureFutureDate(originalDateOnly, _billingCycle);
-    // 주말/고정 공휴일 보정 → 다음 영업일로 이월
-    adjustedNext = BusinessDayUtil.nextBusinessDay(adjustedNext);
     subscription.nextBillingDate = adjustedNext;
     subscription.categoryId = _selectedCategoryId;
     subscription.currency = _currency;
diff --git a/lib/services/notification_service.dart b/lib/services/notification_service.dart
index c171b70..a266253 100644
--- a/lib/services/notification_service.dart
+++ b/lib/services/notification_service.dart
@@ -20,6 +20,24 @@ class NotificationService {
   static const _reminderHourKey = 'reminder_hour';
   static const _reminderMinuteKey = 'reminder_minute';
   static const _dailyReminderKey = 'daily_reminder_enabled';
+  static const int _maxDailyReminderSlots = 7;
+  static const String _paymentPayloadPrefix = 'payment:';
+  static const String _paymentChannelId = 'subscription_channel_v2';
+  static const String _expirationChannelId = 'expiration_channel_v2';
+
+  static String get paymentChannelId => _paymentChannelId;
+  static String get expirationChannelId => _expirationChannelId;
+
+  static String _paymentPayload(String subscriptionId) =>
+      '$_paymentPayloadPrefix$subscriptionId';
+
+  static bool _matchesPaymentPayload(String? payload) =>
+      payload != null && payload.startsWith(_paymentPayloadPrefix);
+
+  static String? _subscriptionIdFromPaymentPayload(String? payload) =>
+      _matchesPaymentPayload(payload)
+          ? payload!.substring(_paymentPayloadPrefix.length)
+          : null;
 
   // 초기화 상태를 추적하기 위한 플래그
   static bool _initialized = false;
@@ -69,14 +87,14 @@ class NotificationService {
           try {
             await androidImpl
                 .createNotificationChannel(const AndroidNotificationChannel(
-              'subscription_channel',
+              _paymentChannelId,
               'Subscription Notifications',
               description: 'Channel for subscription reminders',
               importance: Importance.high,
             ));
             await androidImpl
                 .createNotificationChannel(const AndroidNotificationChannel(
-              'expiration_channel',
+              _expirationChannelId,
               'Expiration Notifications',
               description: 'Channel for subscription expiration reminders',
               importance: Importance.high,
@@ -152,20 +170,32 @@ class NotificationService {
         return;
       }
 
-      // 기존 알림 모두 취소
-      await cancelAllNotifications();
+      final pendingRequests =
+          await _notifications.pendingNotificationRequests();
 
-      // 알림 설정 가져오기
       final isPaymentEnabled = await isPaymentNotificationEnabled();
-      if (!isPaymentEnabled) return;
+      if (!isPaymentEnabled) {
+        await _cancelOrphanedPaymentReminderNotifications(
+          const <String>{},
+          pendingRequests,
+        );
+        return;
+      }
 
       final reminderDays = await getReminderDays();
       final reminderHour = await getReminderHour();
       final reminderMinute = await getReminderMinute();
       final isDailyReminder = await isDailyReminderEnabled();
 
-      // 각 구독에 대해 알림 재설정
+      final activeSubscriptionIds =
+          subscriptions.map((subscription) => subscription.id).toSet();
+
       for (final subscription in subscriptions) {
+        await _cancelPaymentReminderNotificationsForSubscription(
+          subscription,
+          pendingRequests,
+        );
+
         await schedulePaymentReminder(
           subscription: subscription,
           reminderDays: reminderDays,
@@ -174,11 +204,78 @@ class NotificationService {
           isDailyReminder: isDailyReminder,
         );
       }
+
+      await _cancelOrphanedPaymentReminderNotifications(
+        activeSubscriptionIds,
+        pendingRequests,
+      );
     } catch (e) {
       debugPrint('알림 일정 재설정 중 오류 발생: $e');
     }
   }
 
+  static Future<void> _cancelPaymentReminderNotificationsForSubscription(
+    SubscriptionModel subscription,
+    List<PendingNotificationRequest> pendingRequests,
+  ) async {
+    final baseId = subscription.id.hashCode;
+    final payload = _paymentPayload(subscription.id);
+
+    final idsToCancel = <int>{};
+
+    for (final request in pendingRequests) {
+      final matchesPayload = request.payload == payload;
+      final matchesIdPattern = request.id == baseId ||
+          (request.id > baseId &&
+              request.id <= baseId + _maxDailyReminderSlots);
+
+      if (matchesPayload || matchesIdPattern) {
+        idsToCancel.add(request.id);
+      }
+    }
+
+    for (final id in idsToCancel) {
+      try {
+        await _notifications.cancel(id);
+      } catch (e) {
+        debugPrint('결제 알림 취소 중 오류 발생: $e');
+      }
+    }
+
+    if (idsToCancel.isNotEmpty) {
+      pendingRequests
+          .removeWhere((request) => idsToCancel.contains(request.id));
+    }
+  }
+
+  static Future<void> _cancelOrphanedPaymentReminderNotifications(
+    Set<String> activeSubscriptionIds,
+    List<PendingNotificationRequest> pendingRequests,
+  ) async {
+    final idsToCancel = <int>{};
+
+    for (final request in pendingRequests) {
+      final subscriptionId = _subscriptionIdFromPaymentPayload(request.payload);
+      if (subscriptionId != null &&
+          !activeSubscriptionIds.contains(subscriptionId)) {
+        idsToCancel.add(request.id);
+      }
+    }
+
+    for (final id in idsToCancel) {
+      try {
+        await _notifications.cancel(id);
+      } catch (e) {
+        debugPrint('고아 결제 알림 취소 중 오류 발생: $e');
+      }
+    }
+
+    if (idsToCancel.isNotEmpty) {
+      pendingRequests
+          .removeWhere((request) => idsToCancel.contains(request.id));
+    }
+  }
+
   static Future<bool> requestPermission() async {
     // 웹 플랫폼인 경우 false 반환
     if (_isWeb) return false;
@@ -276,12 +373,42 @@ class NotificationService {
     return false;
   }
 
+  static Future<AndroidScheduleMode> _resolveAndroidScheduleMode() async {
+    if (_isWeb) {
+      return AndroidScheduleMode.exactAllowWhileIdle;
+    }
+
+    if (Platform.isAndroid) {
+      try {
+        final canExact = await canScheduleExactAlarms();
+        if (kDebugMode) {
+          debugPrint(
+              '[NotificationService] canScheduleExactAlarms result: $canExact');
+        }
+        if (!canExact) {
+          if (kDebugMode) {
+            debugPrint(
+                '[NotificationService] exact alarm unavailable → use inexact mode');
+          }
+          return AndroidScheduleMode.inexactAllowWhileIdle;
+        }
+      } catch (e) {
+        debugPrint('정확 알람 권한 확인 중 오류 발생: $e');
+        return AndroidScheduleMode.inexactAllowWhileIdle;
+      }
+    }
+
+    return AndroidScheduleMode.exactAllowWhileIdle;
+  }
+
   // 알림 스케줄 설정
   static Future<void> scheduleNotification({
     required int id,
     required String title,
     required String body,
     required DateTime scheduledDate,
+    String? payload,
+    String? channelId,
   }) async {
     // 웹 플랫폼이거나 초기화되지 않은 경우 건너뛰기
     if (_isWeb || !_initialized) {
@@ -291,16 +418,26 @@ class NotificationService {
 
     try {
       final ctx = navigatorKey.currentContext;
-      final channelName = ctx != null
-          ? AppLocalizations.of(ctx).notifications
-          : 'Subscription Notifications';
+      String channelName;
+      if (channelId == _expirationChannelId) {
+        channelName = ctx != null
+            ? AppLocalizations.of(ctx).expirationReminder
+            : 'Expiration Notifications';
+      } else {
+        channelName = ctx != null
+            ? AppLocalizations.of(ctx).notifications
+            : 'Subscription Notifications';
+      }
+
+      final effectiveChannelId = channelId ?? _paymentChannelId;
 
       final androidDetails = AndroidNotificationDetails(
-        'subscription_channel',
+        effectiveChannelId,
         channelName,
         channelDescription: channelName,
         importance: Importance.high,
         priority: Priority.high,
+        autoCancel: false,
       );
 
       const iosDetails = DarwinNotificationDetails(
@@ -334,15 +471,19 @@ class NotificationService {
         target = nowTz.add(const Duration(minutes: 1));
       }
 
+      final scheduleMode = await _resolveAndroidScheduleMode();
+      if (kDebugMode) {
+        debugPrint(
+            '[NotificationService] scheduleNotification scheduleMode=$scheduleMode');
+      }
       await _notifications.zonedSchedule(
         id,
         title,
         body,
         target,
         NotificationDetails(android: androidDetails, iOS: iosDetails),
-        uiLocalNotificationDateInterpretation:
-            UILocalNotificationDateInterpretation.absoluteTime,
-        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
+        androidScheduleMode: scheduleMode,
+        payload: payload,
       );
     } catch (e) {
       debugPrint('알림 예약 중 오류 발생: $e');
@@ -388,11 +529,12 @@ class NotificationService {
 
       final notificationDetails = NotificationDetails(
         android: AndroidNotificationDetails(
-          'subscription_channel',
+          _paymentChannelId,
           title,
           channelDescription: title,
           importance: Importance.high,
           priority: Priority.high,
+          autoCancel: false,
         ),
         iOS: const DarwinNotificationDetails(
           presentAlert: true,
@@ -435,15 +577,19 @@ class NotificationService {
         return;
       }
 
+      final scheduleMode = await _resolveAndroidScheduleMode();
+      if (kDebugMode) {
+        debugPrint(
+            '[NotificationService] scheduleSubscriptionNotification scheduleMode=$scheduleMode');
+      }
+
       await _notifications.zonedSchedule(
         notificationId,
         title,
         _buildExpirationBody(subscription),
         fireAt,
         notificationDetails,
-        uiLocalNotificationDateInterpretation:
-            UILocalNotificationDateInterpretation.absoluteTime,
-        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
+        androidScheduleMode: scheduleMode,
       );
     } catch (e) {
       debugPrint('구독 알림 예약 중 오류 발생: $e');
@@ -515,11 +661,12 @@ class NotificationService {
         tz.TZDateTime.from(reminderDate, location),
         const NotificationDetails(
           android: AndroidNotificationDetails(
-            'expiration_channel',
+            _expirationChannelId,
             'Expiration Notifications',
             channelDescription: 'Channel for subscription expiration reminders',
             importance: Importance.high,
             priority: Priority.high,
+            autoCancel: false,
           ),
           iOS: DarwinNotificationDetails(
             presentAlert: true,
@@ -527,9 +674,7 @@ class NotificationService {
             presentSound: true,
           ),
         ),
-        uiLocalNotificationDateInterpretation:
-            UILocalNotificationDateInterpretation.absoluteTime,
-        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
+        androidScheduleMode: await _resolveAndroidScheduleMode(),
       );
     } catch (e) {
       debugPrint('만료 알림 예약 중 오류 발생: $e');
@@ -605,6 +750,12 @@ class NotificationService {
       // 이벤트 종료로 인한 가격 변동 확인
       final body = await _buildPaymentBody(subscription, daysText);
 
+      final scheduleMode = await _resolveAndroidScheduleMode();
+      if (kDebugMode) {
+        debugPrint(
+            '[NotificationService] schedulePaymentReminder(base) scheduleMode=$scheduleMode');
+      }
+
       await _notifications.zonedSchedule(
         subscription.id.hashCode,
         title,
@@ -612,11 +763,12 @@ class NotificationService {
         scheduledDate,
         NotificationDetails(
           android: AndroidNotificationDetails(
-            'subscription_channel',
+            _paymentChannelId,
             title,
             channelDescription: title,
             importance: Importance.high,
             priority: Priority.high,
+            autoCancel: false,
           ),
           iOS: const DarwinNotificationDetails(
             presentAlert: true,
@@ -624,9 +776,8 @@ class NotificationService {
             presentSound: true,
           ),
         ),
-        uiLocalNotificationDateInterpretation:
-            UILocalNotificationDateInterpretation.absoluteTime,
-        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
+        androidScheduleMode: scheduleMode,
+        payload: _paymentPayload(subscription.id),
       );
 
       // 매일 반복 알림 설정 (2일 이상 전에 알림 시작 & 반복 알림 활성화된 경우)
@@ -670,11 +821,12 @@ class NotificationService {
             dailyDate,
             NotificationDetails(
               android: AndroidNotificationDetails(
-                'subscription_channel',
+                _paymentChannelId,
                 title,
                 channelDescription: title,
                 importance: Importance.high,
                 priority: Priority.high,
+                autoCancel: false,
               ),
               iOS: const DarwinNotificationDetails(
                 presentAlert: true,
@@ -682,9 +834,8 @@ class NotificationService {
                 presentSound: true,
               ),
             ),
-            uiLocalNotificationDateInterpretation:
-                UILocalNotificationDateInterpretation.absoluteTime,
-            androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
+            androidScheduleMode: scheduleMode,
+            payload: _paymentPayload(subscription.id),
           );
         }
       }