diff --git a/app/Console/Commands/StatBackfillCommand.php b/app/Console/Commands/StatBackfillCommand.php
new file mode 100644
index 0000000..397401f
--- /dev/null
+++ b/app/Console/Commands/StatBackfillCommand.php
@@ -0,0 +1,174 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Services\Stats\DimensionSyncService;
+use App\Services\Stats\StatAggregatorService;
+use Carbon\Carbon;
+use Carbon\CarbonPeriod;
+use Illuminate\Console\Command;
+
+class StatBackfillCommand extends Command
+{
+    protected $signature = 'stat:backfill
+        {--from= : 시작 날짜 (YYYY-MM-DD, 필수)}
+        {--to= : 종료 날짜 (YYYY-MM-DD, 기본: 어제)}
+        {--domain= : 특정 도메인만 집계}
+        {--tenant= : 특정 테넌트만 집계}
+        {--skip-monthly : 월간 집계 건너뛰기}
+        {--skip-dimensions : 차원 동기화 건너뛰기}';
+
+    protected $description = '과거 데이터 일괄 통계 집계 (백필)';
+
+    public function handle(StatAggregatorService $aggregator, DimensionSyncService $dimensionSync): int
+    {
+        $from = $this->option('from');
+        if (! $from) {
+            $this->error('--from 옵션은 필수입니다. 예: --from=2024-01-01');
+
+            return self::FAILURE;
+        }
+
+        $startDate = Carbon::parse($from);
+        $endDate = $this->option('to')
+            ? Carbon::parse($this->option('to'))
+            : Carbon::yesterday();
+
+        $domain = $this->option('domain');
+        $tenantId = $this->option('tenant') ? (int) $this->option('tenant') : null;
+
+        $totalDays = $startDate->diffInDays($endDate) + 1;
+
+        $this->info("📊 백필 시작: {$startDate->format('Y-m-d')} ~ {$endDate->format('Y-m-d')} ({$totalDays}일)");
+        if ($domain) {
+            $this->info("  도메인 필터: {$domain}");
+        }
+        if ($tenantId) {
+            $this->info("  테넌트 필터: {$tenantId}");
+        }
+
+        $totalErrors = [];
+        $totalDomainsProcessed = 0;
+        $startTime = microtime(true);
+
+        // 1. 차원 테이블 동기화 (최초 1회)
+        if (! $this->option('skip-dimensions')) {
+            $this->info('');
+            $this->info('🔄 차원 테이블 동기화...');
+            try {
+                $tenants = $this->getTargetTenants($tenantId);
+                foreach ($tenants as $tenant) {
+                    $clients = $dimensionSync->syncClients($tenant->id);
+                    $products = $dimensionSync->syncProducts($tenant->id);
+                    $this->line("  tenant={$tenant->id}: 고객 {$clients}건, 제품 {$products}건");
+                }
+            } catch (\Throwable $e) {
+                $this->warn("  차원 동기화 실패: {$e->getMessage()}");
+            }
+        }
+
+        // 2. 일간 집계
+        $this->info('');
+        $this->info('📅 일간 집계 시작...');
+        $bar = $this->output->createProgressBar($totalDays);
+        $bar->setFormat(' %current%/%max% [%bar%] %percent:3s%% %elapsed:6s%/%estimated:-6s% %message%');
+        $bar->setMessage('');
+
+        $period = CarbonPeriod::create($startDate, $endDate);
+
+        foreach ($period as $date) {
+            $bar->setMessage($date->format('Y-m-d'));
+
+            try {
+                $result = $aggregator->aggregateDaily($date, $domain, $tenantId);
+                $totalDomainsProcessed += $result['domains_processed'];
+
+                if (! empty($result['errors'])) {
+                    $totalErrors = array_merge($totalErrors, $result['errors']);
+                }
+            } catch (\Throwable $e) {
+                $totalErrors[] = "daily {$date->format('Y-m-d')}: {$e->getMessage()}";
+            }
+
+            $bar->advance();
+        }
+
+        $bar->finish();
+        $this->newLine();
+
+        // 3. 월간 집계
+        if (! $this->option('skip-monthly')) {
+            $this->info('');
+            $this->info('📆 월간 집계 시작...');
+
+            $months = $this->getMonthRange($startDate, $endDate);
+            $monthBar = $this->output->createProgressBar(count($months));
+
+            foreach ($months as [$year, $month]) {
+                $monthBar->setMessage("{$year}-".str_pad($month, 2, '0', STR_PAD_LEFT));
+
+                try {
+                    $result = $aggregator->aggregateMonthly($year, $month, $domain, $tenantId);
+                    $totalDomainsProcessed += $result['domains_processed'];
+
+                    if (! empty($result['errors'])) {
+                        $totalErrors = array_merge($totalErrors, $result['errors']);
+                    }
+                } catch (\Throwable $e) {
+                    $totalErrors[] = "monthly {$year}-{$month}: {$e->getMessage()}";
+                }
+
+                $monthBar->advance();
+            }
+
+            $monthBar->finish();
+            $this->newLine();
+        }
+
+        $durationSec = round(microtime(true) - $startTime, 1);
+
+        $this->info('');
+        $this->info('✅ 백필 완료:');
+        $this->info("  - 기간: {$startDate->format('Y-m-d')} ~ {$endDate->format('Y-m-d')} ({$totalDays}일)");
+        $this->info("  - 처리 도메인-테넌트: {$totalDomainsProcessed}건");
+        $this->info("  - 소요 시간: {$durationSec}초");
+
+        if (! empty($totalErrors)) {
+            $this->warn('  - 에러: '.count($totalErrors).'건');
+            foreach (array_slice($totalErrors, 0, 20) as $error) {
+                $this->error("    - {$error}");
+            }
+            if (count($totalErrors) > 20) {
+                $this->warn('    ... 외 '.(count($totalErrors) - 20).'건');
+            }
+
+            return self::FAILURE;
+        }
+
+        return self::SUCCESS;
+    }
+
+    private function getTargetTenants(?int $tenantId): \Illuminate\Database\Eloquent\Collection
+    {
+        $query = \App\Models\Tenants\Tenant::where('tenant_st_code', '!=', 'none');
+        if ($tenantId) {
+            $query->where('id', $tenantId);
+        }
+
+        return $query->get();
+    }
+
+    private function getMonthRange(Carbon $start, Carbon $end): array
+    {
+        $months = [];
+        $current = $start->copy()->startOfMonth();
+        $endMonth = $end->copy()->startOfMonth();
+
+        while ($current->lte($endMonth)) {
+            $months[] = [$current->year, $current->month];
+            $current->addMonth();
+        }
+
+        return $months;
+    }
+}
diff --git a/app/Console/Commands/StatVerifyCommand.php b/app/Console/Commands/StatVerifyCommand.php
new file mode 100644
index 0000000..6efb93e
--- /dev/null
+++ b/app/Console/Commands/StatVerifyCommand.php
@@ -0,0 +1,211 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\Stats\Daily\StatFinanceDaily;
+use App\Models\Stats\Daily\StatSalesDaily;
+use App\Models\Stats\Daily\StatSystemDaily;
+use Carbon\Carbon;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\DB;
+
+class StatVerifyCommand extends Command
+{
+    protected $signature = 'stat:verify
+        {--date= : 검증 날짜 (YYYY-MM-DD, 기본: 어제)}
+        {--tenant= : 특정 테넌트만 검증}
+        {--domain= : 특정 도메인만 검증 (sales,finance,system)}
+        {--fix : 불일치 시 자동 재집계}';
+
+    protected $description = '원본 DB와 sam_stat 통계 정합성 교차 검증';
+
+    private int $totalChecks = 0;
+
+    private int $passedChecks = 0;
+
+    private int $failedChecks = 0;
+
+    private array $mismatches = [];
+
+    public function handle(): int
+    {
+        $date = $this->option('date')
+            ? Carbon::parse($this->option('date'))
+            : Carbon::yesterday();
+        $tenantId = $this->option('tenant') ? (int) $this->option('tenant') : null;
+        $domain = $this->option('domain');
+        $dateStr = $date->format('Y-m-d');
+
+        $this->info("🔍 정합성 검증: {$dateStr}");
+
+        $tenants = $this->getTargetTenants($tenantId);
+
+        $domains = $domain
+            ? [$domain]
+            : ['sales', 'finance', 'system'];
+
+        foreach ($tenants as $tenant) {
+            $this->info('');
+            $this->info("── tenant={$tenant->id} ──");
+
+            foreach ($domains as $d) {
+                match ($d) {
+                    'sales' => $this->verifySales($tenant->id, $dateStr),
+                    'finance' => $this->verifyFinance($tenant->id, $dateStr),
+                    'system' => $this->verifySystem($tenant->id, $dateStr),
+                    default => $this->warn("  미지원 도메인: {$d}"),
+                };
+            }
+        }
+
+        $this->printSummary();
+
+        if ($this->failedChecks > 0 && $this->option('fix')) {
+            $this->info('');
+            $this->info('🔧 불일치 항목 재집계...');
+            $this->reAggregate($date, $tenantId, $domains);
+        }
+
+        return $this->failedChecks > 0 ? self::FAILURE : self::SUCCESS;
+    }
+
+    private function verifySales(int $tenantId, string $dateStr): void
+    {
+        $this->line('  [sales]');
+
+        $originOrderCount = DB::connection('mysql')
+            ->table('orders')
+            ->where('tenant_id', $tenantId)
+            ->whereDate('created_at', $dateStr)
+            ->whereNull('deleted_at')
+            ->count();
+
+        $originSalesAmount = (float) DB::connection('mysql')
+            ->table('sales')
+            ->where('tenant_id', $tenantId)
+            ->where('sale_date', $dateStr)
+            ->whereNull('deleted_at')
+            ->sum('supply_amount');
+
+        $stat = StatSalesDaily::where('tenant_id', $tenantId)
+            ->where('stat_date', $dateStr)
+            ->first();
+
+        $this->check('수주건수', $originOrderCount, $stat?->order_count ?? 0, $tenantId, 'sales');
+        $this->check('매출금액', $originSalesAmount, (float) ($stat?->sales_amount ?? 0), $tenantId, 'sales');
+    }
+
+    private function verifyFinance(int $tenantId, string $dateStr): void
+    {
+        $this->line('  [finance]');
+
+        $originDepositAmount = (float) DB::connection('mysql')
+            ->table('deposits')
+            ->where('tenant_id', $tenantId)
+            ->where('deposit_date', $dateStr)
+            ->whereNull('deleted_at')
+            ->sum('amount');
+
+        $originWithdrawalAmount = (float) DB::connection('mysql')
+            ->table('withdrawals')
+            ->where('tenant_id', $tenantId)
+            ->where('withdrawal_date', $dateStr)
+            ->whereNull('deleted_at')
+            ->sum('amount');
+
+        $stat = StatFinanceDaily::where('tenant_id', $tenantId)
+            ->where('stat_date', $dateStr)
+            ->first();
+
+        $this->check('입금액', $originDepositAmount, (float) ($stat?->deposit_amount ?? 0), $tenantId, 'finance');
+        $this->check('출금액', $originWithdrawalAmount, (float) ($stat?->withdrawal_amount ?? 0), $tenantId, 'finance');
+    }
+
+    private function verifySystem(int $tenantId, string $dateStr): void
+    {
+        $this->line('  [system]');
+
+        $originApiCount = DB::connection('mysql')
+            ->table('api_request_logs')
+            ->where('tenant_id', $tenantId)
+            ->whereDate('created_at', $dateStr)
+            ->count();
+
+        $originAuditCount = DB::connection('mysql')
+            ->table('audit_logs')
+            ->where('tenant_id', $tenantId)
+            ->whereDate('created_at', $dateStr)
+            ->count();
+
+        $stat = StatSystemDaily::where('tenant_id', $tenantId)
+            ->where('stat_date', $dateStr)
+            ->first();
+
+        $this->check('API요청수', $originApiCount, $stat?->api_request_count ?? 0, $tenantId, 'system');
+
+        $statAuditTotal = ($stat?->audit_create_count ?? 0)
+            + ($stat?->audit_update_count ?? 0)
+            + ($stat?->audit_delete_count ?? 0);
+        $this->check('감사로그수', $originAuditCount, $statAuditTotal, $tenantId, 'system');
+    }
+
+    private function check(string $label, float|int $expected, float|int $actual, int $tenantId, string $domain): void
+    {
+        $this->totalChecks++;
+
+        $tolerance = is_float($expected) ? 0.01 : 0;
+        $match = abs($expected - $actual) <= $tolerance;
+
+        if ($match) {
+            $this->passedChecks++;
+            $this->line("    ✅ {$label}: {$actual}");
+        } else {
+            $this->failedChecks++;
+            $this->error("    ❌ {$label}: 원본={$expected} / 통계={$actual} (차이=".($actual - $expected).')');
+            $this->mismatches[] = compact('tenantId', 'domain', 'label', 'expected', 'actual');
+        }
+    }
+
+    private function printSummary(): void
+    {
+        $this->info('');
+        $this->info('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
+        $this->info("📊 검증 결과: {$this->totalChecks}건 검사, ✅ {$this->passedChecks}건 일치, ❌ {$this->failedChecks}건 불일치");
+
+        if ($this->failedChecks > 0) {
+            $this->warn('');
+            $this->warn('불일치 목록:');
+            foreach ($this->mismatches as $m) {
+                $this->warn("  - tenant={$m['tenantId']} [{$m['domain']}] {$m['label']}: 원본={$m['expected']} / 통계={$m['actual']}");
+            }
+        }
+    }
+
+    private function reAggregate(Carbon $date, ?int $tenantId, array $domains): void
+    {
+        $aggregator = app(\App\Services\Stats\StatAggregatorService::class);
+
+        foreach ($domains as $d) {
+            $result = $aggregator->aggregateDaily($date, $d, $tenantId);
+            $this->line("  {$d}: 재집계 완료 ({$result['domains_processed']}건)");
+
+            if (! empty($result['errors'])) {
+                foreach ($result['errors'] as $error) {
+                    $this->error("    {$error}");
+                }
+            }
+        }
+
+        $this->info('✅ 재집계 완료. stat:verify를 다시 실행하여 확인하세요.');
+    }
+
+    private function getTargetTenants(?int $tenantId): \Illuminate\Database\Eloquent\Collection
+    {
+        $query = \App\Models\Tenants\Tenant::where('tenant_st_code', '!=', 'none');
+        if ($tenantId) {
+            $query->where('id', $tenantId);
+        }
+
+        return $query->get();
+    }
+}
diff --git a/app/Services/Stats/StatAggregatorService.php b/app/Services/Stats/StatAggregatorService.php
index 7ca5515..57826b0 100644
--- a/app/Services/Stats/StatAggregatorService.php
+++ b/app/Services/Stats/StatAggregatorService.php
@@ -71,11 +71,19 @@ public function aggregateDaily(Carbon $date, ?string $domain = null, ?int $tenan
 
                     $jobLog->markCompleted($recordCount);
                     $domainsProcessed++;
+
+                    // 캐시 무효화
+                    StatQueryService::invalidateCache($tenant->id, $domainKey);
                 } catch (\Throwable $e) {
                     $errorMsg = "[{$domainKey}] tenant={$tenant->id}: {$e->getMessage()}";
                     $errors[] = $errorMsg;
                     $jobLog->markFailed($e->getMessage());
 
+                    // 모니터링 알림 기록
+                    app(StatMonitorService::class)->recordAggregationFailure(
+                        $tenant->id, $domainKey, "{$domainKey}_daily", $e->getMessage()
+                    );
+
                     Log::error('stat:aggregate-daily 실패', [
                         'domain' => $domainKey,
                         'tenant_id' => $tenant->id,
@@ -129,11 +137,19 @@ public function aggregateMonthly(int $year, int $month, ?string $domain = null,
 
                     $jobLog->markCompleted($recordCount);
                     $domainsProcessed++;
+
+                    // 캐시 무효화
+                    StatQueryService::invalidateCache($tenant->id, $domainKey);
                 } catch (\Throwable $e) {
                     $errorMsg = "[{$domainKey}] tenant={$tenant->id}: {$e->getMessage()}";
                     $errors[] = $errorMsg;
                     $jobLog->markFailed($e->getMessage());
 
+                    // 모니터링 알림 기록
+                    app(StatMonitorService::class)->recordAggregationFailure(
+                        $tenant->id, $domainKey, "{$domainKey}_monthly", $e->getMessage()
+                    );
+
                     Log::error('stat:aggregate-monthly 실패', [
                         'domain' => $domainKey,
                         'tenant_id' => $tenant->id,
diff --git a/app/Services/Stats/StatMonitorService.php b/app/Services/Stats/StatMonitorService.php
new file mode 100644
index 0000000..292df47
--- /dev/null
+++ b/app/Services/Stats/StatMonitorService.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace App\Services\Stats;
+
+use App\Models\Stats\StatAlert;
+use Illuminate\Support\Facades\Log;
+
+class StatMonitorService
+{
+    /**
+     * 집계 실패 알림 기록
+     */
+    public function recordAggregationFailure(int $tenantId, string $domain, string $jobType, string $errorMessage): void
+    {
+        try {
+            StatAlert::create([
+                'tenant_id' => $tenantId,
+                'alert_type' => 'aggregation_failure',
+                'domain' => $domain,
+                'severity' => 'critical',
+                'title' => "[{$jobType}] 집계 실패",
+                'message' => mb_substr($errorMessage, 0, 500),
+                'current_value' => 0,
+                'threshold_value' => 0,
+                'is_read' => false,
+                'is_resolved' => false,
+                'created_at' => now(),
+            ]);
+        } catch (\Throwable $e) {
+            Log::error('stat_alert 기록 실패', [
+                'tenant_id' => $tenantId,
+                'domain' => $domain,
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+
+    /**
+     * 데이터 누락 알림 (특정 날짜에 통계 데이터 없음)
+     */
+    public function recordMissingData(int $tenantId, string $domain, string $date): void
+    {
+        try {
+            // 동일 알림 중복 방지
+            $exists = StatAlert::where('tenant_id', $tenantId)
+                ->where('alert_type', 'missing_data')
+                ->where('domain', $domain)
+                ->where('title', 'LIKE', "%{$date}%")
+                ->where('is_resolved', false)
+                ->exists();
+
+            if ($exists) {
+                return;
+            }
+
+            StatAlert::create([
+                'tenant_id' => $tenantId,
+                'alert_type' => 'missing_data',
+                'domain' => $domain,
+                'severity' => 'warning',
+                'title' => "[{$domain}] {$date} 데이터 누락",
+                'message' => "{$date} 날짜의 {$domain} 통계 데이터가 없습니다. stat:backfill 실행을 권장합니다.",
+                'current_value' => 0,
+                'threshold_value' => 1,
+                'is_read' => false,
+                'is_resolved' => false,
+                'created_at' => now(),
+            ]);
+        } catch (\Throwable $e) {
+            Log::error('stat_alert 기록 실패 (missing_data)', [
+                'tenant_id' => $tenantId,
+                'domain' => $domain,
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+
+    /**
+     * 정합성 불일치 알림
+     */
+    public function recordMismatch(int $tenantId, string $domain, string $label, float|int $expected, float|int $actual): void
+    {
+        try {
+            StatAlert::create([
+                'tenant_id' => $tenantId,
+                'alert_type' => 'data_mismatch',
+                'domain' => $domain,
+                'severity' => 'critical',
+                'title' => "[{$domain}] {$label} 정합성 불일치",
+                'message' => "원본={$expected}, 통계={$actual}, 차이=".($actual - $expected),
+                'current_value' => $actual,
+                'threshold_value' => $expected,
+                'is_read' => false,
+                'is_resolved' => false,
+                'created_at' => now(),
+            ]);
+        } catch (\Throwable $e) {
+            Log::error('stat_alert 기록 실패 (mismatch)', [
+                'tenant_id' => $tenantId,
+                'domain' => $domain,
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+
+    /**
+     * 알림 해결 처리
+     */
+    public function resolveAlerts(int $tenantId, string $domain, string $alertType): int
+    {
+        return StatAlert::where('tenant_id', $tenantId)
+            ->where('domain', $domain)
+            ->where('alert_type', $alertType)
+            ->where('is_resolved', false)
+            ->update([
+                'is_resolved' => true,
+                'resolved_at' => now(),
+            ]);
+    }
+}
diff --git a/app/Services/Stats/StatQueryService.php b/app/Services/Stats/StatQueryService.php
index 8b8a538..2fb4894 100644
--- a/app/Services/Stats/StatQueryService.php
+++ b/app/Services/Stats/StatQueryService.php
@@ -16,9 +16,12 @@
 use App\Models\Stats\StatAlert;
 use App\Services\Service;
 use Carbon\Carbon;
+use Illuminate\Support\Facades\Cache;
 
 class StatQueryService extends Service
 {
+    private const CACHE_TTL = 300; // 5분
+
     /**
      * 도메인별 일간 통계 조회
      */
@@ -28,16 +31,20 @@ public function getDailyStat(string $domain, array $params): array
         $startDate = $params['start_date'];
         $endDate = $params['end_date'];
 
-        $model = $this->getDailyModel($domain);
-        if (! $model) {
-            return [];
-        }
+        $cacheKey = "stat:daily:{$tenantId}:{$domain}:{$startDate}:{$endDate}";
 
-        return $model::where('tenant_id', $tenantId)
-            ->whereBetween('stat_date', [$startDate, $endDate])
-            ->orderBy('stat_date')
-            ->get()
-            ->toArray();
+        return Cache::remember($cacheKey, self::CACHE_TTL, function () use ($domain, $tenantId, $startDate, $endDate) {
+            $model = $this->getDailyModel($domain);
+            if (! $model) {
+                return [];
+            }
+
+            return $model::where('tenant_id', $tenantId)
+                ->whereBetween('stat_date', [$startDate, $endDate])
+                ->orderBy('stat_date')
+                ->get()
+                ->toArray();
+        });
     }
 
     /**
@@ -49,21 +56,25 @@ public function getMonthlyStat(string $domain, array $params): array
         $year = (int) $params['year'];
         $month = isset($params['month']) ? (int) $params['month'] : null;
 
-        $model = $this->getMonthlyModel($domain);
-        if (! $model) {
-            return [];
-        }
+        $cacheKey = "stat:monthly:{$tenantId}:{$domain}:{$year}:".($month ?? 'all');
 
-        $query = $model::where('tenant_id', $tenantId)
-            ->where('stat_year', $year);
+        return Cache::remember($cacheKey, self::CACHE_TTL, function () use ($domain, $tenantId, $year, $month) {
+            $model = $this->getMonthlyModel($domain);
+            if (! $model) {
+                return [];
+            }
 
-        if ($month) {
-            $query->where('stat_month', $month);
-        }
+            $query = $model::where('tenant_id', $tenantId)
+                ->where('stat_year', $year);
 
-        return $query->orderBy('stat_month')
-            ->get()
-            ->toArray();
+            if ($month) {
+                $query->where('stat_month', $month);
+            }
+
+            return $query->orderBy('stat_month')
+                ->get()
+                ->toArray();
+        });
     }
 
     /**
@@ -76,13 +87,17 @@ public function getDashboardSummary(): array
         $year = Carbon::now()->year;
         $month = Carbon::now()->month;
 
-        return [
-            'sales_today' => $this->getTodaySales($tenantId, $today),
-            'finance_today' => $this->getTodayFinance($tenantId, $today),
-            'production_today' => $this->getTodayProduction($tenantId, $today),
-            'sales_monthly' => $this->getMonthlySalesOverview($tenantId, $year, $month),
-            'alerts' => $this->getActiveAlerts($tenantId),
-        ];
+        $cacheKey = "stat:dashboard:{$tenantId}:{$today}";
+
+        return Cache::remember($cacheKey, self::CACHE_TTL, function () use ($tenantId, $today, $year, $month) {
+            return [
+                'sales_today' => $this->getTodaySales($tenantId, $today),
+                'finance_today' => $this->getTodayFinance($tenantId, $today),
+                'production_today' => $this->getTodayProduction($tenantId, $today),
+                'sales_monthly' => $this->getMonthlySalesOverview($tenantId, $year, $month),
+                'alerts' => $this->getActiveAlerts($tenantId),
+            ];
+        });
     }
 
     /**
@@ -104,6 +119,42 @@ public function getAlerts(array $params): array
         return $query->limit($limit)->get()->toArray();
     }
 
+    /**
+     * 집계 완료 시 관련 캐시 무효화
+     */
+    public static function invalidateCache(int $tenantId, ?string $domain = null): void
+    {
+        $patterns = [
+            "stat:dashboard:{$tenantId}:*",
+        ];
+
+        if ($domain) {
+            $patterns[] = "stat:daily:{$tenantId}:{$domain}:*";
+            $patterns[] = "stat:monthly:{$tenantId}:{$domain}:*";
+        } else {
+            $patterns[] = "stat:daily:{$tenantId}:*";
+            $patterns[] = "stat:monthly:{$tenantId}:*";
+        }
+
+        // Redis 태그 기반 또는 키 패턴 삭제
+        $redis = Cache::getStore();
+        if (method_exists($redis, 'getRedis')) {
+            $connection = $redis->getRedis();
+            $prefix = config('cache.prefix', '').':';
+
+            foreach ($patterns as $pattern) {
+                $keys = $connection->keys($prefix.$pattern);
+                if (! empty($keys)) {
+                    $connection->del($keys);
+                }
+            }
+        } else {
+            // Redis가 아닌 경우 개별 키 삭제 (대시보드만)
+            $today = Carbon::today()->format('Y-m-d');
+            Cache::forget("stat:dashboard:{$tenantId}:{$today}");
+        }
+    }
+
     private function getTodaySales(int $tenantId, string $today): ?array
     {
         $stat = StatSalesDaily::where('tenant_id', $tenantId)
diff --git a/database/migrations/stats/2026_01_29_300001_prepare_partitioning_daily_tables.php b/database/migrations/stats/2026_01_29_300001_prepare_partitioning_daily_tables.php
new file mode 100644
index 0000000..c39e25d
--- /dev/null
+++ b/database/migrations/stats/2026_01_29_300001_prepare_partitioning_daily_tables.php
@@ -0,0 +1,138 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+/**
+ * 일간 통계 테이블 RANGE 파티셔닝 준비
+ *
+ * 실행 방법: php artisan migrate --path=database/migrations/stats/2026_01_29_300001_prepare_partitioning_daily_tables.php
+ *
+ * 주의: MySQL에서 파티셔닝 적용 시 UNIQUE KEY에 파티션 컬럼(stat_date)이 포함되어야 합니다.
+ *       이 마이그레이션은 기존 데이터를 보존하며 파티셔닝을 적용합니다.
+ */
+return new class extends Migration
+{
+    protected $connection = 'sam_stat';
+
+    /**
+     * 파티셔닝 대상 테이블과 고유 키 정의
+     */
+    private function getTargetTables(): array
+    {
+        return [
+            'stat_sales_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_finance_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_production_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_inventory_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_quote_pipeline_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_hr_attendance_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+            'stat_system_daily' => [
+                'unique_columns' => 'tenant_id, stat_date',
+                'unique_name' => 'uk_tenant_date',
+            ],
+        ];
+    }
+
+    /**
+     * 연도별 파티션 정의 생성 (2024~2028 + MAXVALUE)
+     */
+    private function getPartitionDefinitions(): string
+    {
+        $partitions = [];
+        for ($year = 2024; $year <= 2028; $year++) {
+            $partitions[] = "PARTITION p{$year} VALUES LESS THAN ('{$year}-01-01')";
+        }
+        $partitions[] = 'PARTITION p_future VALUES LESS THAN MAXVALUE';
+
+        return implode(",\n    ", $partitions);
+    }
+
+    public function up(): void
+    {
+        $tables = $this->getTargetTables();
+        $partitionDefs = $this->getPartitionDefinitions();
+
+        foreach ($tables as $table => $config) {
+            // 테이블 존재 여부 확인
+            $exists = DB::connection('sam_stat')
+                ->select("SHOW TABLES LIKE '{$table}'");
+
+            if (empty($exists)) {
+                continue;
+            }
+
+            // 이미 파티셔닝되어 있는지 확인
+            $partitionInfo = DB::connection('sam_stat')
+                ->select('SELECT PARTITION_NAME FROM INFORMATION_SCHEMA.PARTITIONS
+                          WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = ? AND PARTITION_NAME IS NOT NULL',
+                    [$table]);
+
+            if (! empty($partitionInfo)) {
+                continue; // 이미 파티셔닝됨
+            }
+
+            // AUTO_INCREMENT PK를 일반 PK로 변경 (파티션 키 포함)
+            // MySQL 파티셔닝 제약: UNIQUE KEY에 파티션 컬럼 포함 필수
+            DB::connection('sam_stat')->statement("
+                ALTER TABLE `{$table}`
+                DROP PRIMARY KEY,
+                ADD PRIMARY KEY (`id`, `stat_date`),
+                DROP INDEX `{$config['unique_name']}`,
+                ADD UNIQUE KEY `{$config['unique_name']}` ({$config['unique_columns']})
+            ");
+
+            // RANGE 파티셔닝 적용
+            DB::connection('sam_stat')->statement("
+                ALTER TABLE `{$table}`
+                PARTITION BY RANGE COLUMNS(`stat_date`) (
+                    {$partitionDefs}
+                )
+            ");
+        }
+    }
+
+    public function down(): void
+    {
+        $tables = $this->getTargetTables();
+
+        foreach ($tables as $table => $config) {
+            $exists = DB::connection('sam_stat')
+                ->select("SHOW TABLES LIKE '{$table}'");
+
+            if (empty($exists)) {
+                continue;
+            }
+
+            // 파티션 제거
+            DB::connection('sam_stat')->statement("
+                ALTER TABLE `{$table}` REMOVE PARTITIONING
+            ");
+
+            // PK 원복
+            DB::connection('sam_stat')->statement("
+                ALTER TABLE `{$table}`
+                DROP PRIMARY KEY,
+                ADD PRIMARY KEY (`id`)
+            ");
+        }
+    }
+};