diff --git a/database/migrations/2026_03_18_100000_add_ai_token_limit_and_update_storage_limit.php b/database/migrations/2026_03_18_100000_add_ai_token_limit_and_update_storage_limit.php
new file mode 100644
index 00000000..48b73f37
--- /dev/null
+++ b/database/migrations/2026_03_18_100000_add_ai_token_limit_and_update_storage_limit.php
@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     * - ai_token_limit 컬럼 추가 (월 100만 토큰 기본)
+     * - storage_limit 기본값 10GB → 100GB 변경
+     */
+    public function up(): void
+    {
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->bigInteger('ai_token_limit')
+                ->default(1000000)
+                ->after('storage_grace_period_until')
+                ->comment('월별 AI 토큰 한도 (기본 100만)');
+        });
+
+        // 기존 storage_limit 기본값 10GB인 테넌트를 100GB로 변경
+        DB::table('tenants')
+            ->where('storage_limit', 10737418240) // 10GB
+            ->update(['storage_limit' => 107374182400]); // 100GB
+
+        // 새로 생성되는 테넌트의 기본값도 100GB로 변경
+        DB::statement('ALTER TABLE tenants ALTER COLUMN storage_limit SET DEFAULT 107374182400');
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // storage_limit 기본값 복원
+        DB::statement('ALTER TABLE tenants ALTER COLUMN storage_limit SET DEFAULT 10737418240');
+
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->dropColumn('ai_token_limit');
+        });
+    }
+};