diff --git a/app/Services/ClientService.php b/app/Services/ClientService.php
index bf44e33..87484f3 100644
--- a/app/Services/ClientService.php
+++ b/app/Services/ClientService.php
@@ -9,6 +9,7 @@
 use Illuminate\Support\Facades\DB;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use App\Services\PushNotificationService;
 
 class ClientService extends Service
 {
@@ -132,7 +133,13 @@ public function store(array $data)
         $data['tenant_id'] = $tenantId;
         $data['is_active'] = $data['is_active'] ?? true;
 
-        return Client::create($data);
+        $client = Client::create($data);
+
+        // 신규 거래처 등록 푸시 발송
+        app(PushNotificationService::class)
+            ->notifyNewClient($client->id, $client->name, $tenantId);
+
+        return $client;
     }
 
     /**
diff --git a/app/Services/Fcm/FcmSender.php b/app/Services/Fcm/FcmSender.php
index 683b021..852f576 100644
--- a/app/Services/Fcm/FcmSender.php
+++ b/app/Services/Fcm/FcmSender.php
@@ -109,7 +109,7 @@ private function buildMessage(
                     'ttl' => config('fcm.defaults.ttl', '86400s'),
                     'notification' => [
                         'channel_id' => $channelId,
-                        'sound' => 'default',
+                        'sound' => $this->getSoundForChannel($channelId),
                     ],
                 ],
                 'apns' => [
@@ -270,4 +270,19 @@ private function logError(array $message, \Exception $e): void
             'trace' => $e->getTraceAsString(),
         ]);
     }
+
+    /**
+     * 채널 ID에 따른 사운드 파일명 반환
+     */
+    private function getSoundForChannel(string $channelId): string
+    {
+        return match ($channelId) {
+            'push_payment' => 'push_payment',
+            'push_sales_order' => 'push_sales_order',
+            'push_purchase_order' => 'push_purchase_order',
+            'push_contract' => 'push_contract',
+            'push_urgent' => 'push_urgent',
+            default => 'push_default',
+        };
+    }
 }
diff --git a/app/Services/PushNotificationService.php b/app/Services/PushNotificationService.php
index 2ca97db..cbd841f 100644
--- a/app/Services/PushNotificationService.php
+++ b/app/Services/PushNotificationService.php
@@ -3,333 +3,196 @@
 namespace App\Services;
 
 use App\Models\PushDeviceToken;
-use App\Models\PushNotificationSetting;
 use App\Services\Fcm\FcmSender;
 use Illuminate\Support\Facades\Log;
 
+/**
+ * 비즈니스 이벤트 기반 푸시 알림 서비스
+ */
 class PushNotificationService extends Service
 {
+    public function __construct(
+        private readonly FcmSender $fcmSender
+    ) {}
+
     /**
-     * FCM 토큰 등록/갱신
+     * 비즈니스 이벤트에 따른 푸시 발송
+     *
+     * @param  string  $event  이벤트 타입 (new_client, payment, sales_order 등)
+     * @param  string  $title  알림 제목
+     * @param  string  $body  알림 내용
+     * @param  array  $data  추가 데이터 (딥링크, ID 등)
+     * @param  int|null  $tenantId  특정 테넌트 (null이면 현재 컨텍스트)
+     * @param  int|null  $userId  특정 사용자에게만 발송 (null이면 테넌트 전체)
      */
-    public function registerToken(array $data): PushDeviceToken
-    {
-        $tenantId = $this->tenantId();
-        $userId = $this->apiUserId();
+    public function sendByEvent(
+        string $event,
+        string $title,
+        string $body,
+        array $data = [],
+        ?int $tenantId = null,
+        ?int $userId = null
+    ): void {
+        $tenantId = $tenantId ?? $this->tenantIdOrNull();
 
-        // 동일 토큰이 있으면 업데이트, 없으면 생성
-        $token = PushDeviceToken::withoutGlobalScopes()
-            ->where('token', $data['token'])
-            ->first();
+        if (! $tenantId) {
+            Log::warning('[PushNotificationService] No tenant_id provided');
 
-        if ($token) {
-            // 기존 토큰 업데이트 (다른 사용자의 토큰이면 이전 것은 비활성화)
-            if ($token->user_id !== $userId || $token->tenant_id !== $tenantId) {
-                $token->update([
-                    'tenant_id' => $tenantId,
-                    'user_id' => $userId,
-                    'platform' => $data['platform'],
-                    'device_name' => $data['device_name'] ?? null,
-                    'app_version' => $data['app_version'] ?? null,
-                    'is_active' => true,
-                    'last_used_at' => now(),
-                    'deleted_at' => null,
-                ]);
-            } else {
-                $token->update([
-                    'platform' => $data['platform'],
-                    'device_name' => $data['device_name'] ?? null,
-                    'app_version' => $data['app_version'] ?? null,
-                    'is_active' => true,
-                    'last_used_at' => now(),
-                ]);
-            }
-        } else {
-            // 새 토큰 생성
-            $token = PushDeviceToken::create([
+            return;
+        }
+
+        $channelId = $this->getChannelForEvent($event);
+
+        // 해당 테넌트의 활성 토큰 조회 (global scope 무시)
+        $query = PushDeviceToken::withoutGlobalScopes()
+            ->forTenant($tenantId)
+            ->active();
+
+        // 특정 사용자에게만 발송
+        if ($userId) {
+            $query->forUser($userId);
+        }
+
+        $tokens = $query->pluck('token')->toArray();
+
+        if (empty($tokens)) {
+            Log::info('[PushNotificationService] No active tokens found', [
                 'tenant_id' => $tenantId,
                 'user_id' => $userId,
-                'token' => $data['token'],
-                'platform' => $data['platform'],
-                'device_name' => $data['device_name'] ?? null,
-                'app_version' => $data['app_version'] ?? null,
-                'is_active' => true,
-                'last_used_at' => now(),
-            ]);
-        }
-
-        // 사용자 기본 알림 설정 초기화 (없는 경우)
-        $this->initializeDefaultSettings($tenantId, $userId);
-
-        Log::info('FCM token registered', [
-            'user_id' => $userId,
-            'platform' => $data['platform'],
-            'token_id' => $token->id,
-        ]);
-
-        return $token;
-    }
-
-    /**
-     * FCM 토큰 비활성화
-     */
-    public function unregisterToken(string $tokenValue): bool
-    {
-        $token = PushDeviceToken::withoutGlobalScopes()
-            ->where('token', $tokenValue)
-            ->first();
-
-        if ($token) {
-            $token->update(['is_active' => false]);
-
-            Log::info('FCM token unregistered', [
-                'token_id' => $token->id,
+                'event' => $event,
             ]);
 
-            return true;
+            return;
         }
 
-        return false;
-    }
-
-    /**
-     * 사용자의 활성 토큰 목록 조회
-     */
-    public function getUserTokens(?int $userId = null): array
-    {
-        $userId = $userId ?? $this->apiUserId();
-
-        return PushDeviceToken::forUser($userId)
-            ->active()
-            ->get()
-            ->toArray();
-    }
-
-    /**
-     * 알림 설정 조회
-     */
-    public function getSettings(?int $userId = null): array
-    {
-        $tenantId = $this->tenantId();
-        $userId = $userId ?? $this->apiUserId();
-
-        $settings = PushNotificationSetting::where('tenant_id', $tenantId)
-            ->forUser($userId)
-            ->get()
-            ->keyBy('notification_type');
-
-        // 모든 알림 유형에 대한 설정 반환 (없으면 기본값)
-        $result = [];
-        foreach (PushNotificationSetting::getAllTypes() as $type) {
-            if ($settings->has($type)) {
-                $result[$type] = $settings->get($type)->toArray();
-            } else {
-                $result[$type] = [
-                    'notification_type' => $type,
-                    'is_enabled' => true,
-                    'sound' => $this->getDefaultSound($type),
-                    'vibrate' => true,
-                    'show_preview' => true,
-                ];
-            }
-        }
-
-        return $result;
-    }
-
-    /**
-     * 알림 설정 업데이트
-     */
-    public function updateSettings(array $settings): array
-    {
-        $tenantId = $this->tenantId();
-        $userId = $this->apiUserId();
-
-        $updated = [];
-        foreach ($settings as $setting) {
-            $record = PushNotificationSetting::updateOrCreate(
-                [
-                    'tenant_id' => $tenantId,
-                    'user_id' => $userId,
-                    'notification_type' => $setting['notification_type'],
-                ],
-                [
-                    'is_enabled' => $setting['is_enabled'],
-                    'sound' => $setting['sound'] ?? $this->getDefaultSound($setting['notification_type']),
-                    'vibrate' => $setting['vibrate'] ?? true,
-                    'show_preview' => $setting['show_preview'] ?? true,
-                ]
-            );
-            $updated[] = $record->toArray();
-        }
-
-        return $updated;
-    }
-
-    /**
-     * 특정 사용자에게 푸시 알림 전송 (FCM HTTP v1 API)
-     */
-    public function sendToUser(int $userId, string $notificationType, array $notification): bool
-    {
-        $tenantId = $this->tenantIdOrNull() ?? 0;
-
-        // 사용자 알림 설정 확인
-        $setting = PushNotificationSetting::where('tenant_id', $tenantId)
-            ->forUser($userId)
-            ->ofType($notificationType)
-            ->first();
-
-        // 알림이 비활성화된 경우 전송 안함
-        if ($setting && ! $setting->is_enabled) {
-            Log::info('Push notification skipped (disabled)', [
-                'user_id' => $userId,
-                'type' => $notificationType,
-            ]);
-
-            return false;
-        }
-
-        // 사용자의 활성 토큰 조회
-        $tokens = PushDeviceToken::withoutGlobalScopes()
-            ->forUser($userId)
-            ->active()
-            ->get();
-
-        if ($tokens->isEmpty()) {
-            Log::info('Push notification skipped (no tokens)', [
-                'user_id' => $userId,
-            ]);
-
-            return false;
-        }
-
-        // 알림음 결정
-        $sound = $setting?->sound ?? $this->getDefaultSound($notificationType);
-
-        $successCount = 0;
-        foreach ($tokens as $token) {
-            $result = $this->sendFcmMessage($token, $notification, $sound, $notificationType);
-            if ($result) {
-                $successCount++;
-            }
-        }
-
-        return $successCount > 0;
-    }
-
-    /**
-     * FCM 메시지 전송 (FCM HTTP v1 API)
-     */
-    protected function sendFcmMessage(
-        PushDeviceToken $token,
-        array $notification,
-        string $sound,
-        string $notificationType
-    ): bool {
-        // FCM 설정이 없으면 로그만 기록
-        if (empty(config('fcm.project_id'))) {
-            Log::info('FCM message skipped (not configured)', [
-                'token_id' => $token->id,
-                'platform' => $token->platform,
-                'title' => $notification['title'] ?? '',
-                'body' => $notification['body'] ?? '',
-                'type' => $notificationType,
-            ]);
-
-            return true; // 설정이 없어도 실패로 처리하지 않음
-        }
-
-        // 알림 유형에 따른 채널 결정
-        $channelId = $this->getChannelId($notificationType);
-
-        // 추가 데이터 구성
-        $data = array_merge($notification['data'] ?? [], [
-            'notification_type' => $notificationType,
-            'sound' => $sound,
-        ]);
+        // 이벤트 타입을 data에 추가
+        $data['event'] = $event;
 
         try {
-            $sender = new FcmSender;
-            $response = $sender->sendToToken(
-                $token->token,
-                $notification['title'] ?? '',
-                $notification['body'] ?? '',
+            $result = $this->fcmSender->sendToMany(
+                $tokens,
+                $title,
+                $body,
                 $channelId,
                 $data
             );
 
-            // 유효하지 않은 토큰이면 비활성화
-            if ($response->isInvalidToken()) {
-                $token->update(['is_active' => false]);
-                Log::warning('FCM token invalidated', [
-                    'token_id' => $token->id,
-                    'error' => $response->error,
-                ]);
-
-                return false;
-            }
-
-            return $response->success;
-
-        } catch (\Exception $e) {
-            Log::error('FCM send failed', [
-                'token_id' => $token->id,
-                'error' => $e->getMessage(),
+            Log::info('[PushNotificationService] Push sent', [
+                'tenant_id' => $tenantId,
+                'event' => $event,
+                'channel_id' => $channelId,
+                'token_count' => count($tokens),
+                'success_count' => $result->getSuccessCount(),
+                'failure_count' => $result->getFailureCount(),
             ]);
 
-            return false;
+        } catch (\Exception $e) {
+            Log::error('[PushNotificationService] Push failed', [
+                'tenant_id' => $tenantId,
+                'event' => $event,
+                'error' => $e->getMessage(),
+            ]);
         }
     }
 
     /**
-     * 알림 유형에 따른 채널 ID 결정
+     * 신규 거래처 등록 알림
      */
-    protected function getChannelId(string $notificationType): string
+    public function notifyNewClient(int $clientId, string $clientName, ?int $tenantId = null): void
     {
-        // 긴급 알림 유형들
-        $urgentTypes = [
-            PushNotificationSetting::TYPE_APPROVAL,
-            PushNotificationSetting::TYPE_ORDER,
-        ];
-
-        return in_array($notificationType, $urgentTypes, true)
-            ? config('fcm.channels.urgent', 'push_urgent')
-            : config('fcm.channels.default', 'push_default');
+        $this->sendByEvent(
+            'new_client',
+            '신규 거래처 등록',
+            "새로운 거래처 '{$clientName}'이(가) 등록되었습니다.",
+            ['client_id' => $clientId, 'type' => 'client'],
+            $tenantId
+        );
     }
 
     /**
-     * 기본 알림 설정 초기화
+     * 결제 알림
      */
-    protected function initializeDefaultSettings(int $tenantId, int $userId): void
+    public function notifyPayment(int $paymentId, string $message, ?int $tenantId = null, ?int $userId = null): void
     {
-        foreach (PushNotificationSetting::getAllTypes() as $type) {
-            PushNotificationSetting::firstOrCreate(
-                [
-                    'tenant_id' => $tenantId,
-                    'user_id' => $userId,
-                    'notification_type' => $type,
-                ],
-                [
-                    'is_enabled' => true,
-                    'sound' => $this->getDefaultSound($type),
-                    'vibrate' => true,
-                    'show_preview' => true,
-                ]
-            );
-        }
+        $this->sendByEvent(
+            'payment',
+            '결제 알림',
+            $message,
+            ['payment_id' => $paymentId, 'type' => 'payment'],
+            $tenantId,
+            $userId
+        );
     }
 
     /**
-     * 알림 유형별 기본 알림음
+     * 수주 알림
      */
-    protected function getDefaultSound(string $type): string
+    public function notifySalesOrder(int $orderId, string $message, ?int $tenantId = null): void
     {
-        return match ($type) {
-            PushNotificationSetting::TYPE_DEPOSIT => PushNotificationSetting::SOUND_DEPOSIT,
-            PushNotificationSetting::TYPE_WITHDRAWAL => PushNotificationSetting::SOUND_WITHDRAWAL,
-            PushNotificationSetting::TYPE_ORDER => PushNotificationSetting::SOUND_ORDER,
-            PushNotificationSetting::TYPE_APPROVAL => PushNotificationSetting::SOUND_APPROVAL,
-            default => PushNotificationSetting::SOUND_DEFAULT,
+        $this->sendByEvent(
+            'sales_order',
+            '수주 알림',
+            $message,
+            ['order_id' => $orderId, 'type' => 'sales_order'],
+            $tenantId
+        );
+    }
+
+    /**
+     * 발주 알림
+     */
+    public function notifyPurchaseOrder(int $orderId, string $message, ?int $tenantId = null): void
+    {
+        $this->sendByEvent(
+            'purchase_order',
+            '발주 알림',
+            $message,
+            ['order_id' => $orderId, 'type' => 'purchase_order'],
+            $tenantId
+        );
+    }
+
+    /**
+     * 계약 알림
+     */
+    public function notifyContract(int $contractId, string $message, ?int $tenantId = null): void
+    {
+        $this->sendByEvent(
+            'contract',
+            '계약 알림',
+            $message,
+            ['contract_id' => $contractId, 'type' => 'contract'],
+            $tenantId
+        );
+    }
+
+    /**
+     * 일반 알림
+     */
+    public function notifyGeneral(string $title, string $body, array $data = [], ?int $tenantId = null, ?int $userId = null): void
+    {
+        $this->sendByEvent(
+            'general',
+            $title,
+            $body,
+            $data,
+            $tenantId,
+            $userId
+        );
+    }
+
+    /**
+     * 이벤트 타입에 따른 채널 ID 반환
+     */
+    private function getChannelForEvent(string $event): string
+    {
+        return match ($event) {
+            'new_client' => 'push_urgent',
+            'payment' => 'push_payment',
+            'sales_order' => 'push_sales_order',
+            'purchase_order' => 'push_purchase_order',
+            'contract' => 'push_contract',
+            default => 'push_default',
         };
     }
 }