diff --git a/database/seeders/CategorySeeder.php b/database/seeders/CategorySeeder.php
index 6234323..74ae324 100644
--- a/database/seeders/CategorySeeder.php
+++ b/database/seeders/CategorySeeder.php
@@ -13,6 +13,11 @@ class CategorySeeder extends Seeder
     public function run(): void
     {
         $categories = [
+            [
+                'name' => '商品',
+                'description' => '由原物料加工完成的成品',
+                'is_active' => true,
+            ],
             [
                 'name' => '原物料',
                 'description' => '製作飲品或餐點的基礎原料',
diff --git a/database/seeders/TenantDatabaseSeeder.php b/database/seeders/TenantDatabaseSeeder.php
index 42d5dd7..dc8640c 100644
--- a/database/seeders/TenantDatabaseSeeder.php
+++ b/database/seeders/TenantDatabaseSeeder.php
@@ -37,6 +37,9 @@ class TenantDatabaseSeeder extends Seeder
         // 初始化基本單位資料
         $this->call(UnitSeeder::class);
 
+        // 初始化預設商品分類
+        $this->call(CategorySeeder::class);
+
         // 確保 admin 擁有 super-admin 角色
         if (!$admin->hasRole('super-admin')) {
             $admin->assignRole('super-admin');