diff --git a/app/Models/ProfitCenter.php b/app/Models/ProfitCenter.php
index 169a518..b035f3e 100644
--- a/app/Models/ProfitCenter.php
+++ b/app/Models/ProfitCenter.php
@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
@@ -33,6 +34,11 @@ public function suppliers(): BelongsToMany
         return $this->belongsToMany(Supplier::class)->withTimestamps();
     }
 
+    public function supplierCustomerCodes(): HasMany
+    {
+        return $this->hasMany(ProfitCenterSupplierCode::class);
+    }
+
     public function contact(): MorphMany
     {
         return $this->morphMany(Contact::class, 'contactable');
diff --git a/app/Models/ProfitCenterSupplierCode.php b/app/Models/ProfitCenterSupplierCode.php
new file mode 100644
index 0000000..826c314
--- /dev/null
+++ b/app/Models/ProfitCenterSupplierCode.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class ProfitCenterSupplierCode extends BaseAuditable
+{
+    use SoftDeletes;
+
+    protected $guarded = ['id', 'created_at', 'updated_at'];
+
+    public function profitCenter(): BelongsTo
+    {
+        return $this->belongsTo(ProfitCenter::class);
+    }
+
+    public function supplier(): BelongsTo
+    {
+        return $this->belongsTo(Supplier::class);
+    }
+}
diff --git a/app/Models/Supplier.php b/app/Models/Supplier.php
index 404da01..94cba64 100644
--- a/app/Models/Supplier.php
+++ b/app/Models/Supplier.php
@@ -44,6 +44,11 @@ public function profitCenter(): BelongsToMany
         return $this->belongsToMany(ProfitCenter::class)->withTimestamps();
     }
 
+    public function customerCodes(): HasMany
+    {
+        return $this->hasMany(ProfitCenterSupplierCode::class);
+    }
+
     public function users(): HasMany
     {
         return $this->hasMany(User::class);
diff --git a/database/migrations/2026_08_09_090000_add_customer_code_to_suppliers_table.php b/database/migrations/2026_08_09_090000_add_customer_code_to_suppliers_table.php
new file mode 100644
index 0000000..410466a
--- /dev/null
+++ b/database/migrations/2026_08_09_090000_add_customer_code_to_suppliers_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('suppliers', function (Blueprint $table) {
+            $table->boolean('hasCustomerCode')->default(false)->after('deliveryLeadTime');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('suppliers', function (Blueprint $table) {
+            $table->dropColumn('hasCustomerCode');
+        });
+    }
+};
diff --git a/database/migrations/2026_08_09_091500_create_profit_center_supplier_codes_table.php b/database/migrations/2026_08_09_091500_create_profit_center_supplier_codes_table.php
new file mode 100644
index 0000000..6d7f538
--- /dev/null
+++ b/database/migrations/2026_08_09_091500_create_profit_center_supplier_codes_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('profit_center_supplier_codes', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('profit_center_id')->constrained()->onDelete('cascade');
+            $table->foreignId('supplier_id')->constrained()->onDelete('cascade');
+            $table->string('customerCode')->nullable();
+            $table->userIdFields();
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->unique(['profit_center_id', 'supplier_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('profit_center_supplier_codes');
+    }
+};