diff --git a/app/Http/Controllers/Api/V1/CardTransactionController.php b/app/Http/Controllers/Api/V1/CardTransactionController.php
index 33f5a5f..25a457a 100644
--- a/app/Http/Controllers/Api/V1/CardTransactionController.php
+++ b/app/Http/Controllers/Api/V1/CardTransactionController.php
@@ -53,6 +53,18 @@ public function summary(Request $request): JsonResponse
         }, __('message.fetched'));
     }
 
+    /**
+     * 카드 거래 대시보드 데이터
+     *
+     * CEO 대시보드 카드/가지급금 관리 섹션의 cm1 모달용 상세 데이터
+     */
+    public function dashboard(): JsonResponse
+    {
+        return ApiResponse::handle(function () {
+            return $this->service->dashboard();
+        }, __('message.fetched'));
+    }
+
     /**
      * 계정과목 일괄 수정
      */
diff --git a/app/Services/CardTransactionService.php b/app/Services/CardTransactionService.php
index 633681d..9ecb406 100644
--- a/app/Services/CardTransactionService.php
+++ b/app/Services/CardTransactionService.php
@@ -263,4 +263,175 @@ public function destroy(int $id): bool
             return true;
         });
     }
+
+    /**
+     * 카드 거래 대시보드 데이터
+     *
+     * CEO 대시보드 카드/가지급금 관리 섹션의 cm1 모달용 상세 데이터 제공
+     *
+     * @return array{
+     *     summary: array{
+     *         current_month_total: float,
+     *         previous_month_total: float,
+     *         change_rate: float,
+     *         unprocessed_count: int
+     *     },
+     *     monthly_trend: array<array{month: string, amount: float}>,
+     *     user_ratio: array<array{user_name: string, amount: float, percentage: float}>,
+     *     recent_transactions: array
+     * }
+     */
+    public function dashboard(): array
+    {
+        $currentDate = now();
+
+        // 당월/전월 기간 계산
+        $currentMonthStart = $currentDate->copy()->startOfMonth()->toDateString();
+        $currentMonthEnd = $currentDate->copy()->endOfMonth()->toDateString();
+        $previousMonthStart = $currentDate->copy()->subMonth()->startOfMonth()->toDateString();
+        $previousMonthEnd = $currentDate->copy()->subMonth()->endOfMonth()->toDateString();
+
+        // 1. Summary 데이터
+        $currentMonthTotal = $this->getMonthTotal($currentMonthStart, $currentMonthEnd);
+        $previousMonthTotal = $this->getMonthTotal($previousMonthStart, $previousMonthEnd);
+
+        $changeRate = $previousMonthTotal > 0
+            ? round((($currentMonthTotal - $previousMonthTotal) / $previousMonthTotal) * 100, 1)
+            : ($currentMonthTotal > 0 ? 100 : 0);
+
+        // 미정리 건수 (account_code가 없는 건)
+        $unprocessedCount = Withdrawal::query()
+            ->where('payment_method', 'card')
+            ->whereNull('account_code')
+            ->count();
+
+        // 2. 최근 6개월 추이
+        $monthlyTrend = $this->getMonthlyTrend(6);
+
+        // 3. 사용자별 비율 (당월 기준)
+        $userRatio = $this->getUserRatio($currentMonthStart, $currentMonthEnd);
+
+        // 4. 최근 거래 10건
+        $recentTransactions = $this->getRecentTransactions(10);
+
+        return [
+            'summary' => [
+                'current_month_total' => (float) $currentMonthTotal,
+                'previous_month_total' => (float) $previousMonthTotal,
+                'change_rate' => $changeRate,
+                'unprocessed_count' => $unprocessedCount,
+            ],
+            'monthly_trend' => $monthlyTrend,
+            'user_ratio' => $userRatio,
+            'recent_transactions' => $recentTransactions,
+        ];
+    }
+
+    /**
+     * 특정 기간 카드 사용액 합계
+     */
+    private function getMonthTotal(string $startDate, string $endDate): float
+    {
+        return (float) Withdrawal::query()
+            ->where('payment_method', 'card')
+            ->whereBetween(DB::raw('DATE(COALESCE(used_at, withdrawal_date))'), [$startDate, $endDate])
+            ->sum('amount');
+    }
+
+    /**
+     * 최근 N개월 월별 추이
+     *
+     * @return array<array{month: string, amount: float}>
+     */
+    private function getMonthlyTrend(int $months): array
+    {
+        $result = [];
+        $currentDate = now();
+
+        for ($i = $months - 1; $i >= 0; $i--) {
+            $targetDate = $currentDate->copy()->subMonths($i);
+            $monthStart = $targetDate->copy()->startOfMonth()->toDateString();
+            $monthEnd = $targetDate->copy()->endOfMonth()->toDateString();
+
+            $amount = $this->getMonthTotal($monthStart, $monthEnd);
+
+            $result[] = [
+                'month' => $targetDate->format('Y-m'),
+                'amount' => $amount,
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * 사용자별 카드 사용 비율
+     *
+     * @return array<array{user_name: string, amount: float, percentage: float}>
+     */
+    private function getUserRatio(string $startDate, string $endDate): array
+    {
+        $data = Withdrawal::query()
+            ->select([
+                'cards.assigned_user_id',
+                DB::raw('COALESCE(users.name, "미지정") as user_name'),
+                DB::raw('SUM(withdrawals.amount) as total_amount'),
+            ])
+            ->leftJoin('cards', 'withdrawals.card_id', '=', 'cards.id')
+            ->leftJoin('users', 'cards.assigned_user_id', '=', 'users.id')
+            ->where('withdrawals.payment_method', 'card')
+            ->whereBetween(DB::raw('DATE(COALESCE(withdrawals.used_at, withdrawals.withdrawal_date))'), [$startDate, $endDate])
+            ->groupBy('cards.assigned_user_id', 'users.name')
+            ->orderByDesc('total_amount')
+            ->get();
+
+        $totalAmount = $data->sum('total_amount');
+
+        return $data->map(function ($item) use ($totalAmount) {
+            return [
+                'user_name' => $item->user_name,
+                'amount' => (float) $item->total_amount,
+                'percentage' => $totalAmount > 0
+                    ? round(($item->total_amount / $totalAmount) * 100, 1)
+                    : 0,
+            ];
+        })->toArray();
+    }
+
+    /**
+     * 최근 거래 목록
+     */
+    private function getRecentTransactions(int $limit): array
+    {
+        return Withdrawal::query()
+            ->select([
+                'withdrawals.id',
+                'withdrawals.used_at',
+                'withdrawals.withdrawal_date',
+                'withdrawals.merchant_name',
+                'withdrawals.amount',
+                'withdrawals.account_code',
+                'cards.card_name',
+                DB::raw('COALESCE(users.name, "미지정") as user_name'),
+            ])
+            ->leftJoin('cards', 'withdrawals.card_id', '=', 'cards.id')
+            ->leftJoin('users', 'cards.assigned_user_id', '=', 'users.id')
+            ->where('withdrawals.payment_method', 'card')
+            ->orderByDesc(DB::raw('COALESCE(withdrawals.used_at, withdrawals.withdrawal_date)'))
+            ->limit($limit)
+            ->get()
+            ->map(function ($item) {
+                return [
+                    'id' => $item->id,
+                    'card_name' => $item->card_name ?? '미지정',
+                    'user_name' => $item->user_name,
+                    'used_at' => $item->used_at?->format('Y-m-d H:i:s')
+                        ?? $item->withdrawal_date?->format('Y-m-d'),
+                    'merchant_name' => $item->merchant_name ?? '',
+                    'amount' => (float) $item->amount,
+                    'usage_type' => $item->account_code,
+                ];
+            })
+            ->toArray();
+    }
 }
diff --git a/app/Swagger/v1/CardTransactionApi.php b/app/Swagger/v1/CardTransactionApi.php
index 04c1db4..f1081b8 100644
--- a/app/Swagger/v1/CardTransactionApi.php
+++ b/app/Swagger/v1/CardTransactionApi.php
@@ -87,6 +87,63 @@
  *
  *     @OA\Property(property="account_code", type="string", description="계정과목 코드", example="expenses")
  * )
+ *
+ * @OA\Schema(
+ *     schema="CardTransactionDashboard",
+ *     description="카드 거래 대시보드 데이터 (CEO 대시보드 cm1 모달용)",
+ *
+ *     @OA\Property(
+ *         property="summary",
+ *         type="object",
+ *         description="요약 통계",
+ *         @OA\Property(property="current_month_total", type="number", format="float", description="당월 카드 사용액", example=30123000),
+ *         @OA\Property(property="previous_month_total", type="number", format="float", description="전월 카드 사용액", example=27250000),
+ *         @OA\Property(property="change_rate", type="number", format="float", description="전월 대비 증감률 (%)", example=10.5),
+ *         @OA\Property(property="unprocessed_count", type="integer", description="미정리 건수", example=5)
+ *     ),
+ *     @OA\Property(
+ *         property="monthly_trend",
+ *         type="array",
+ *         description="최근 6개월 추이",
+ *
+ *         @OA\Items(
+ *             type="object",
+ *
+ *             @OA\Property(property="month", type="string", description="년월", example="2026-01"),
+ *             @OA\Property(property="amount", type="number", format="float", description="사용액", example=25000000)
+ *         )
+ *     ),
+ *     @OA\Property(
+ *         property="user_ratio",
+ *         type="array",
+ *         description="사용자별 비율",
+ *
+ *         @OA\Items(
+ *             type="object",
+ *
+ *             @OA\Property(property="user_name", type="string", description="사용자명", example="홍길동"),
+ *             @OA\Property(property="amount", type="number", format="float", description="사용액", example=15000000),
+ *             @OA\Property(property="percentage", type="number", format="float", description="비율 (%)", example=49.8)
+ *         )
+ *     ),
+ *     @OA\Property(
+ *         property="recent_transactions",
+ *         type="array",
+ *         description="최근 거래 10건",
+ *
+ *         @OA\Items(
+ *             type="object",
+ *
+ *             @OA\Property(property="id", type="integer", description="거래 ID", example=1),
+ *             @OA\Property(property="card_name", type="string", description="카드명", example="법인카드1"),
+ *             @OA\Property(property="user_name", type="string", description="사용자명", example="홍길동"),
+ *             @OA\Property(property="used_at", type="string", description="사용일시", example="2026-01-15 14:30:00"),
+ *             @OA\Property(property="merchant_name", type="string", description="가맹점명", example="스타벅스 강남역점"),
+ *             @OA\Property(property="amount", type="number", format="float", description="사용금액", example=15000),
+ *             @OA\Property(property="usage_type", type="string", description="계정과목", example="expenses", nullable=true)
+ *         )
+ *     )
+ * )
  */
 class CardTransactionApi
 {
@@ -224,6 +281,33 @@ public function index() {}
      */
     public function summary() {}
 
+    /**
+     * @OA\Get(
+     *     path="/api/v1/card-transactions/dashboard",
+     *     operationId="getCardTransactionDashboard",
+     *     tags={"CardTransaction"},
+     *     summary="카드 거래 대시보드 데이터",
+     *     description="CEO 대시보드 카드/가지급금 관리 섹션(cm1)의 모달 팝업용 상세 데이터를 조회합니다. 요약 통계, 월별 추이, 사용자별 비율, 최근 거래 목록을 포함합니다.",
+     *     security={{"ApiKeyAuth": {}}, {"BearerAuth": {}}},
+     *
+     *     @OA\Response(
+     *         response=200,
+     *         description="성공",
+     *
+     *         @OA\JsonContent(
+     *
+     *             @OA\Property(property="success", type="boolean", example=true),
+     *             @OA\Property(property="message", type="string", example="데이터를 조회했습니다."),
+     *             @OA\Property(property="data", ref="#/components/schemas/CardTransactionDashboard")
+     *         )
+     *     ),
+     *
+     *     @OA\Response(response=401, description="인증 실패"),
+     *     @OA\Response(response=403, description="권한 없음")
+     * )
+     */
+    public function dashboard() {}
+
     /**
      * @OA\Put(
      *     path="/api/v1/card-transactions/bulk-update-account",
diff --git a/routes/api.php b/routes/api.php
index 28a3ab5..43bb6c5 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -594,6 +594,7 @@
         Route::prefix('card-transactions')->group(function () {
             Route::get('', [CardTransactionController::class, 'index'])->name('v1.card-transactions.index');
             Route::get('/summary', [CardTransactionController::class, 'summary'])->name('v1.card-transactions.summary');
+            Route::get('/dashboard', [CardTransactionController::class, 'dashboard'])->name('v1.card-transactions.dashboard');
             Route::post('', [CardTransactionController::class, 'store'])->name('v1.card-transactions.store');
             Route::put('/bulk-update-account', [CardTransactionController::class, 'bulkUpdateAccountCode'])->name('v1.card-transactions.bulk-update-account');
             Route::get('/{id}', [CardTransactionController::class, 'show'])->whereNumber('id')->name('v1.card-transactions.show');
@@ -719,6 +720,7 @@
             Route::get('', [PurchaseController::class, 'index'])->name('v1.purchases.index');
             Route::post('', [PurchaseController::class, 'store'])->name('v1.purchases.store');
             Route::get('/summary', [PurchaseController::class, 'summary'])->name('v1.purchases.summary');
+            Route::get('/dashboard-detail', [PurchaseController::class, 'dashboardDetail'])->name('v1.purchases.dashboard-detail');
             Route::post('/bulk-update-type', [PurchaseController::class, 'bulkUpdatePurchaseType'])->name('v1.purchases.bulk-update-type');
             Route::post('/bulk-update-tax-received', [PurchaseController::class, 'bulkUpdateTaxReceived'])->name('v1.purchases.bulk-update-tax-received');
             Route::get('/{id}', [PurchaseController::class, 'show'])->whereNumber('id')->name('v1.purchases.show');