diff --git a/app/Domains/Commerce/Purchase/Models/Purchase.php b/app/Domains/Commerce/Purchase/Models/Purchase.php
index 5c75fa7f..68fec2f3 100644
--- a/app/Domains/Commerce/Purchase/Models/Purchase.php
+++ b/app/Domains/Commerce/Purchase/Models/Purchase.php
@@ -2,13 +2,14 @@
 
 namespace App\Domains\Commerce\Purchase\Models;
 
-use App\Domains\Core\Auth\Models\User;
 use App\Domains\Commerce\Cart\Models\Cart;
 use App\Domains\Commerce\Catalog\Models\StockReservation;
-use App\Shared\Logging\Models\Concerns\LogsValueChanges;
 use App\Domains\Commerce\Purchase\Events\PurchasePaid;
+use App\Domains\Core\Auth\Models\User;
 use App\Domains\Core\Tenant\Models\Tenant;
+use App\Domains\Ticketing\Event\Models\Event;
 use App\Domains\Ticketing\Ticket\Models\Ticket;
+use App\Shared\Logging\Models\Concerns\LogsValueChanges;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -21,6 +22,7 @@ use Illuminate\Support\Facades\DB;
 #[Fillable([
     'cart_id',
     'stock_reservation_id',
+    'event_id',
     'tenant_codigo',
     'user_id',
     'status',
@@ -149,6 +151,7 @@ class Purchase extends Model
         return [
             'cart_id' => 'integer',
             'stock_reservation_id' => 'integer',
+            'event_id' => 'integer',
             'user_id' => 'integer',
             'total' => 'decimal:2',
         ];
@@ -162,6 +165,12 @@ class Purchase extends Model
         return $this->belongsTo(Tenant::class, 'tenant_codigo', 'codigo');
     }
 
+    /** @return BelongsTo<Event, $this> */
+    public function event(): BelongsTo
+    {
+        return $this->belongsTo(Event::class);
+    }
+
     /**
      * @return BelongsTo<User, $this>
      */
diff --git a/app/Domains/Commerce/Purchase/Resources/PurchaseResource.php b/app/Domains/Commerce/Purchase/Resources/PurchaseResource.php
index 2e98a2e8..d5624cf5 100644
--- a/app/Domains/Commerce/Purchase/Resources/PurchaseResource.php
+++ b/app/Domains/Commerce/Purchase/Resources/PurchaseResource.php
@@ -36,11 +36,11 @@ class PurchaseResource extends JsonResource
                 === StorefrontWebsiteType::CHECKOUT_SUMMARY_EVENT;
         /** @var Event|null $checkoutEvent */
         $checkoutEvent = $usesEventSummary
-            ? $items
+            ? ($this->event ?? $items
                 ->map(fn (PurchaseItem $item) => $item->sourceCatalogItem?->event)
                 ->filter()
                 ->unique('id')
-                ->first()
+                ->first())
             : null;
 
         $subtotal = $items->isNotEmpty()
@@ -62,6 +62,7 @@ class PurchaseResource extends JsonResource
         return [
             'id' => $this->id,
             'cart_id' => $this->cart_id,
+            'event_id' => $this->event_id,
             'tenant_codigo' => $this->tenant_codigo,
             'user_id' => $this->user_id,
             'created_at' => $this->created_at,
diff --git a/app/Domains/Commerce/Purchase/Services/Checkout/PurchaseResponseLoader.php b/app/Domains/Commerce/Purchase/Services/Checkout/PurchaseResponseLoader.php
index ed82d2d6..88dfb5f3 100644
--- a/app/Domains/Commerce/Purchase/Services/Checkout/PurchaseResponseLoader.php
+++ b/app/Domains/Commerce/Purchase/Services/Checkout/PurchaseResponseLoader.php
@@ -14,6 +14,7 @@ class PurchaseResponseLoader
             === StorefrontWebsiteType::CHECKOUT_SUMMARY_EVENT;
         $relations = [
             'tenant',
+            'event.attachment',
             'items.sourceCatalogItem.event.attachment',
             'stockReservation',
         ];
diff --git a/app/Domains/Commerce/Purchase/Services/Checkout/StartCheckoutService.php b/app/Domains/Commerce/Purchase/Services/Checkout/StartCheckoutService.php
index e2a1bf14..e21ab889 100644
--- a/app/Domains/Commerce/Purchase/Services/Checkout/StartCheckoutService.php
+++ b/app/Domains/Commerce/Purchase/Services/Checkout/StartCheckoutService.php
@@ -206,6 +206,7 @@ class StartCheckoutService
                 fn (array $line): float => $line['selection']->getPrice() * $line['quantity'],
             ),
             $cart->getKey(),
+            $cartItems->first()?->catalogItem?->event_id,
         );
         $cart->update(['current_purchase_id' => $purchase->getKey()]);
         $this->reservations->attachToPurchase($cart, $purchase, $this->checkoutExpiration());
@@ -273,6 +274,7 @@ class StartCheckoutService
             $purchaseData,
             $cart->getTotalAmount(),
             $cart->getKey(),
+            $cartItems->first()?->catalogItem?->event_id,
         );
         $cart->update(['current_purchase_id' => $purchase->getKey()]);
         $this->reservations->attachToPurchase($cart, $purchase, $this->checkoutExpiration());
@@ -410,10 +412,12 @@ class StartCheckoutService
         array $purchaseData,
         float $total,
         ?int $cartId,
+        ?int $eventId,
     ): Purchase {
         return Purchase::query()->create([
             ...$purchaseData,
             'cart_id' => $cartId,
+            'event_id' => $eventId,
             'tenant_codigo' => $tenant->codigo,
             'user_id' => $userId,
             'status' => Purchase::STATUS_CREATED,
diff --git a/app/Domains/Core/Client/Models/Client.php b/app/Domains/Core/Client/Models/Client.php
index f52054ff..e7381320 100644
--- a/app/Domains/Core/Client/Models/Client.php
+++ b/app/Domains/Core/Client/Models/Client.php
@@ -2,8 +2,9 @@
 
 namespace App\Domains\Core\Client\Models;
 
-use App\Shared\Integration\Models\ClientIntegration;
 use App\Domains\Core\Tenant\Models\Tenant;
+use App\Domains\Ticketing\Event\Models\Event;
+use App\Shared\Integration\Models\ClientIntegration;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
@@ -22,6 +23,12 @@ class Client extends Model
         return $this->hasMany(Tenant::class);
     }
 
+    /** @return HasMany<Event, $this> */
+    public function events(): HasMany
+    {
+        return $this->hasMany(Event::class);
+    }
+
     /** @return HasMany<ClientIntegration, $this> */
     public function integrations(): HasMany
     {
diff --git a/app/Domains/Ticketing/Event/Models/Event.php b/app/Domains/Ticketing/Event/Models/Event.php
index d27905f1..ca3e042d 100644
--- a/app/Domains/Ticketing/Event/Models/Event.php
+++ b/app/Domains/Ticketing/Event/Models/Event.php
@@ -3,6 +3,7 @@
 namespace App\Domains\Ticketing\Event\Models;
 
 use App\Domains\Commerce\Catalog\Models\CatalogItem;
+use App\Domains\Core\Client\Models\Client;
 use App\Domains\Core\Tenant\Models\SocialMedia;
 use App\Domains\Core\Tenant\Models\Tenant;
 use App\Domains\Ticketing\Ticket\Models\Ticket;
@@ -14,14 +15,14 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
-#[Fillable(['tenant_code', 'slug', 'event_category_id', 'title', 'subtitle', 'description', 'location', 'exact_location', 'date_text', 'published_at', 'attachment_id'])]
+#[Fillable(['client_id', 'tenant_code', 'slug', 'event_category_id', 'title', 'subtitle', 'description', 'location', 'exact_location', 'date_text', 'published_at', 'attachment_id'])]
 class Event extends Model
 {
     use HasFactory;
 
     protected function casts(): array
     {
-        return ['published_at' => 'datetime', 'exact_location' => 'array'];
+        return ['client_id' => 'integer', 'published_at' => 'datetime', 'exact_location' => 'array'];
     }
 
     /** @return BelongsTo<Tenant, $this> */
@@ -30,6 +31,17 @@ class Event extends Model
         return $this->belongsTo(Tenant::class, 'tenant_code', 'codigo');
     }
 
+    /** @return BelongsTo<Client, $this> */
+    public function client(): BelongsTo
+    {
+        return $this->belongsTo(Client::class);
+    }
+
+    public function effectiveClient(): Client
+    {
+        return $this->client ?? $this->tenant->client;
+    }
+
     /** @return BelongsTo<EventCategory, $this> */
     public function eventCategory(): BelongsTo
     {
diff --git a/database/migrations/2026_09_28_000000_add_client_id_to_events.php b/database/migrations/2026_09_28_000000_add_client_id_to_events.php
new file mode 100644
index 00000000..039f6804
--- /dev/null
+++ b/database/migrations/2026_09_28_000000_add_client_id_to_events.php
@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('events', function (Blueprint $table): void {
+            $table->foreignId('client_id')
+                ->nullable()
+                ->after('id')
+                ->constrained('clients')
+                ->restrictOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('events', function (Blueprint $table): void {
+            $table->dropConstrainedForeignId('client_id');
+        });
+    }
+};
diff --git a/database/migrations/2026_09_28_000100_add_event_id_to_compras.php b/database/migrations/2026_09_28_000100_add_event_id_to_compras.php
new file mode 100644
index 00000000..0dad3a5b
--- /dev/null
+++ b/database/migrations/2026_09_28_000100_add_event_id_to_compras.php
@@ -0,0 +1,44 @@
+<?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
+{
+    public function up(): void
+    {
+        Schema::table('compras', function (Blueprint $table): void {
+            $table->foreignId('event_id')
+                ->nullable()
+                ->after('tenant_codigo')
+                ->constrained('events')
+                ->nullOnDelete();
+        });
+
+        DB::table('compras')
+            ->orderBy('id')
+            ->each(function (object $purchase): void {
+                $eventIds = DB::table('compra_items')
+                    ->join('catalog_items', 'catalog_items.id', '=', 'compra_items.source_catalog_item_id')
+                    ->where('compra_items.compra_id', $purchase->id)
+                    ->whereNotNull('catalog_items.event_id')
+                    ->distinct()
+                    ->pluck('catalog_items.event_id');
+
+                if ($eventIds->count() === 1) {
+                    DB::table('compras')
+                        ->where('id', $purchase->id)
+                        ->update(['event_id' => $eventIds->first()]);
+                }
+            });
+    }
+
+    public function down(): void
+    {
+        Schema::table('compras', function (Blueprint $table): void {
+            $table->dropConstrainedForeignId('event_id');
+        });
+    }
+};
diff --git a/database/migrations/2026_09_28_000200_assign_arrufo_event_to_pyme_rural_client.php b/database/migrations/2026_09_28_000200_assign_arrufo_event_to_pyme_rural_client.php
new file mode 100644
index 00000000..601f22e8
--- /dev/null
+++ b/database/migrations/2026_09_28_000200_assign_arrufo_event_to_pyme_rural_client.php
@@ -0,0 +1,42 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    private const EVENT_TITLE = '26.º Fiesta de la Tradición y 4.º Encuentro de Agrupaciones Gauchas';
+
+    public function up(): void
+    {
+        $clientId = DB::table('clients')
+            ->where('code', 'pyme_rural')
+            ->value('id');
+
+        if ($clientId === null) {
+            return;
+        }
+
+        DB::table('events')
+            ->where('tenant_code', 'onticket')
+            ->where('title', self::EVENT_TITLE)
+            ->update(['client_id' => $clientId]);
+    }
+
+    public function down(): void
+    {
+        $clientId = DB::table('clients')
+            ->where('code', 'pyme_rural')
+            ->value('id');
+
+        if ($clientId === null) {
+            return;
+        }
+
+        DB::table('events')
+            ->where('tenant_code', 'onticket')
+            ->where('title', self::EVENT_TITLE)
+            ->where('client_id', $clientId)
+            ->update(['client_id' => null]);
+    }
+};
diff --git a/database/seeders/FiestaTradicionArrufoSeeder.php b/database/seeders/FiestaTradicionArrufoSeeder.php
index 79b0dbbd..69263cb7 100644
--- a/database/seeders/FiestaTradicionArrufoSeeder.php
+++ b/database/seeders/FiestaTradicionArrufoSeeder.php
@@ -6,6 +6,7 @@ use App\Domains\Commerce\Catalog\Enums\InventoryPolicy;
 use App\Domains\Commerce\Catalog\Models\Attribute;
 use App\Domains\Commerce\Catalog\Models\CatalogItem;
 use App\Domains\Commerce\Catalog\Services\CatalogService;
+use App\Domains\Core\Client\Models\Client;
 use App\Domains\Core\Tenant\Models\Tenant;
 use App\Domains\Ticketing\Event\Models\Event;
 use App\Shared\Attachable\Services\AttachmentService;
@@ -35,6 +36,12 @@ class FiestaTradicionArrufoSeeder extends Seeder
             throw new RuntimeException("Tenant 'onticket' no encontrado.");
         }
 
+        $client = Client::query()->where('code', 'pyme_rural')->first();
+
+        if ($client === null) {
+            throw new RuntimeException("Client 'pyme_rural' no encontrado.");
+        }
+
         Attribute::query()->firstOrCreate(
             ['tenant_codigo' => $tenant->codigo, 'codigo' => 'event_date'],
             ['nombre' => 'Fecha', 'type' => FieldType::EventDate, 'is_required' => true],
@@ -45,6 +52,7 @@ class FiestaTradicionArrufoSeeder extends Seeder
             ['published_at' => now()],
         );
         $event->update([
+            'client_id' => $client->id,
             'subtitle' => 'Una noche para celebrar nuestras raíces y mantener viva la tradición gaucha.',
             'description' => 'La 26.º Fiesta de la Tradición y 4.º Encuentro de Agrupaciones Gauchas reunirá a agrupaciones, artesanos, pilcheros y público en general para compartir una jornada dedicada a nuestras costumbres y cultura.'
                 ."\n\n".'Un encuentro para disfrutar de la tradición, la identidad gaucha y el espíritu de camaradería, en el Predio de Doma del Club Unión Deportiva Arrufó.'
diff --git a/tests/Feature/Migrations/AddClientIdToEventsTest.php b/tests/Feature/Migrations/AddClientIdToEventsTest.php
new file mode 100644
index 00000000..1fdb6e0d
--- /dev/null
+++ b/tests/Feature/Migrations/AddClientIdToEventsTest.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use App\Domains\Core\Client\Models\Client;
+use App\Domains\Ticketing\Event\Models\Event;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Tests\TestCase;
+
+class AddClientIdToEventsTest extends TestCase
+{
+    public function test_event_client_overrides_the_tenant_client_when_configured(): void
+    {
+        Schema::create('clients', function (Blueprint $table): void {
+            $table->id();
+            $table->string('code');
+            $table->string('name');
+        });
+        Schema::create('tenants', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('client_id');
+            $table->string('codigo');
+        });
+        Schema::create('events', function (Blueprint $table): void {
+            $table->id();
+            $table->string('tenant_code');
+            $table->string('title');
+            $table->timestamps();
+        });
+
+        DB::table('clients')->insert([
+            ['id' => 10, 'code' => 'tenant-client', 'name' => 'Tenant Client'],
+            ['id' => 11, 'code' => 'event-client', 'name' => 'Event Client'],
+        ]);
+        DB::table('tenants')->insert(['id' => 20, 'client_id' => 10, 'codigo' => 'tenant']);
+        DB::table('events')->insert([
+            'id' => 30,
+            'tenant_code' => 'tenant',
+            'title' => 'Event',
+            'created_at' => now(),
+            'updated_at' => now(),
+        ]);
+
+        $migration = require database_path('migrations/2026_09_28_000000_add_client_id_to_events.php');
+        $migration->up();
+
+        $event = Event::query()->findOrFail(30);
+        $this->assertSame(10, $event->effectiveClient()->id);
+
+        $event->update(['client_id' => 11]);
+
+        $this->assertSame(11, $event->fresh()->effectiveClient()->id);
+        $this->assertTrue(Client::query()->findOrFail(11)->events()->whereKey(30)->exists());
+    }
+}
diff --git a/tests/Feature/Migrations/AddEventIdToPurchasesTest.php b/tests/Feature/Migrations/AddEventIdToPurchasesTest.php
new file mode 100644
index 00000000..2c6d24e3
--- /dev/null
+++ b/tests/Feature/Migrations/AddEventIdToPurchasesTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Tests\TestCase;
+
+class AddEventIdToPurchasesTest extends TestCase
+{
+    public function test_it_backfills_the_event_from_purchase_items(): void
+    {
+        Schema::create('events', fn (Blueprint $table) => $table->id());
+        Schema::create('compras', fn (Blueprint $table) => $table->id());
+        Schema::create('catalog_items', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('event_id')->nullable();
+        });
+        Schema::create('compra_items', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('compra_id');
+            $table->foreignId('source_catalog_item_id');
+        });
+
+        DB::table('events')->insert([['id' => 10], ['id' => 11]]);
+        DB::table('compras')->insert([['id' => 20], ['id' => 21]]);
+        DB::table('catalog_items')->insert([
+            ['id' => 30, 'event_id' => 10],
+            ['id' => 31, 'event_id' => 11],
+        ]);
+        DB::table('compra_items')->insert([
+            ['compra_id' => 20, 'source_catalog_item_id' => 30],
+            ['compra_id' => 21, 'source_catalog_item_id' => 30],
+            ['compra_id' => 21, 'source_catalog_item_id' => 31],
+        ]);
+
+        $migration = require database_path('migrations/2026_09_28_000100_add_event_id_to_compras.php');
+        $migration->up();
+
+        $this->assertDatabaseHas('compras', ['id' => 20, 'event_id' => 10]);
+        $this->assertDatabaseHas('compras', ['id' => 21, 'event_id' => null]);
+    }
+}
diff --git a/tests/Feature/Migrations/AssignArrufoEventToPymeRuralClientTest.php b/tests/Feature/Migrations/AssignArrufoEventToPymeRuralClientTest.php
new file mode 100644
index 00000000..91a80fd2
--- /dev/null
+++ b/tests/Feature/Migrations/AssignArrufoEventToPymeRuralClientTest.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Tests\TestCase;
+
+class AssignArrufoEventToPymeRuralClientTest extends TestCase
+{
+    public function test_it_assigns_only_the_arrufo_event_to_pyme_rural(): void
+    {
+        Schema::create('clients', function (Blueprint $table): void {
+            $table->id();
+            $table->string('code');
+        });
+        Schema::create('events', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('client_id')->nullable();
+            $table->string('tenant_code');
+            $table->string('title');
+        });
+
+        DB::table('clients')->insert([
+            ['id' => 10, 'code' => 'pyme_rural'],
+            ['id' => 11, 'code' => 'onticket'],
+        ]);
+        DB::table('events')->insert([
+            [
+                'id' => 20,
+                'client_id' => null,
+                'tenant_code' => 'onticket',
+                'title' => '26.º Fiesta de la Tradición y 4.º Encuentro de Agrupaciones Gauchas',
+            ],
+            [
+                'id' => 21,
+                'client_id' => 11,
+                'tenant_code' => 'onticket',
+                'title' => 'Otro evento',
+            ],
+        ]);
+
+        $migration = require database_path('migrations/2026_09_28_000200_assign_arrufo_event_to_pyme_rural_client.php');
+        $migration->up();
+
+        $this->assertDatabaseHas('events', ['id' => 20, 'client_id' => 10]);
+        $this->assertDatabaseHas('events', ['id' => 21, 'client_id' => 11]);
+    }
+}