diff --git a/app/Models/User.php b/app/Models/User.php
index 54f2910..166745c 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -12,13 +12,14 @@
 use Illuminate\Database\Eloquent\Relations\HasOne;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
+use Laravel\Cashier\Billable;
 
 #[Fillable(['name', 'email', 'password', 'plan', 'settings'])]
 #[Hidden(['password', 'remember_token'])]
 class User extends Authenticatable
 {
     /** @use HasFactory<UserFactory> */
-    use HasFactory, Notifiable;
+    use Billable, HasFactory, Notifiable;
 
     protected $attributes = [
         'plan' => 'free',
diff --git a/database/migrations/2026_06_02_143126_create_customer_columns.php b/database/migrations/2026_06_02_143126_create_customer_columns.php
new file mode 100644
index 0000000..974b381
--- /dev/null
+++ b/database/migrations/2026_06_02_143126_create_customer_columns.php
@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->string('stripe_id')->nullable()->index();
+            $table->string('pm_type')->nullable();
+            $table->string('pm_last_four', 4)->nullable();
+            $table->timestamp('trial_ends_at')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropIndex([
+                'stripe_id',
+            ]);
+
+            $table->dropColumn([
+                'stripe_id',
+                'pm_type',
+                'pm_last_four',
+                'trial_ends_at',
+            ]);
+        });
+    }
+};
diff --git a/database/migrations/2026_06_02_143127_create_subscriptions_table.php b/database/migrations/2026_06_02_143127_create_subscriptions_table.php
new file mode 100644
index 0000000..ccbcc6d
--- /dev/null
+++ b/database/migrations/2026_06_02_143127_create_subscriptions_table.php
@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('subscriptions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id');
+            $table->string('type');
+            $table->string('stripe_id')->unique();
+            $table->string('stripe_status');
+            $table->string('stripe_price')->nullable();
+            $table->integer('quantity')->nullable();
+            $table->timestamp('trial_ends_at')->nullable();
+            $table->timestamp('ends_at')->nullable();
+            $table->timestamps();
+
+            $table->index(['user_id', 'stripe_status']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('subscriptions');
+    }
+};
diff --git a/database/migrations/2026_06_02_143128_create_subscription_items_table.php b/database/migrations/2026_06_02_143128_create_subscription_items_table.php
new file mode 100644
index 0000000..420e23f
--- /dev/null
+++ b/database/migrations/2026_06_02_143128_create_subscription_items_table.php
@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('subscription_items', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('subscription_id');
+            $table->string('stripe_id')->unique();
+            $table->string('stripe_product');
+            $table->string('stripe_price');
+            $table->integer('quantity')->nullable();
+            $table->timestamps();
+
+            $table->index(['subscription_id', 'stripe_price']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('subscription_items');
+    }
+};
diff --git a/database/migrations/2026_06_02_143129_add_meter_id_to_subscription_items_table.php b/database/migrations/2026_06_02_143129_add_meter_id_to_subscription_items_table.php
new file mode 100644
index 0000000..033bb82
--- /dev/null
+++ b/database/migrations/2026_06_02_143129_add_meter_id_to_subscription_items_table.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('subscription_items', function (Blueprint $table) {
+            $table->string('meter_id')->nullable()->after('stripe_price');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('subscription_items', function (Blueprint $table) {
+            $table->dropColumn('meter_id');
+        });
+    }
+};
diff --git a/database/migrations/2026_06_02_143130_add_meter_event_name_to_subscription_items_table.php b/database/migrations/2026_06_02_143130_add_meter_event_name_to_subscription_items_table.php
new file mode 100644
index 0000000..b157b3a
--- /dev/null
+++ b/database/migrations/2026_06_02_143130_add_meter_event_name_to_subscription_items_table.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('subscription_items', function (Blueprint $table) {
+            $table->string('meter_event_name')->nullable()->after('quantity');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('subscription_items', function (Blueprint $table) {
+            $table->dropColumn('meter_event_name');
+        });
+    }
+};
diff --git a/tests/Unit/Billing/CashierBillableTest.php b/tests/Unit/Billing/CashierBillableTest.php
new file mode 100644
index 0000000..c992d8b
--- /dev/null
+++ b/tests/Unit/Billing/CashierBillableTest.php
@@ -0,0 +1,10 @@
+<?php
+
+use App\Models\User;
+use Laravel\Cashier\Billable;
+
+it('uses cashier billable trait on user model', function () {
+    $traits = class_uses_recursive(User::class);
+
+    expect($traits)->toHaveKey(Billable::class);
+});