diff --git a/database/migrations/2024_01_09_084515_product_cost_field_population.php b/database/migrations/2024_01_09_084515_product_cost_field_population.php
new file mode 100644
index 000000000000..4397f8e0fab7
--- /dev/null
+++ b/database/migrations/2024_01_09_084515_product_cost_field_population.php
@@ -0,0 +1,50 @@
+<?php
+
+use App\Utils\Ninja;
+use App\Models\Invoice;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        if(Ninja::isHosted()) {
+            return;
+        }
+        
+        Invoice::withTrashed()
+            ->where('is_deleted', false)
+            ->cursor()
+            ->each(function (Invoice $invoice) {
+                
+                
+                $line_items = $invoice->line_items;
+
+                foreach ($line_items as $key => $item)
+                {
+
+                    if($item?->product_cost == 0 && $product = Product::where('company_id', $invoice->company_id)->where('product_key', $item->product_key)->where('cost', '>', 0)->first())
+                    {
+                        $line_items[$key]->product_cost = $product->cost;
+                    }
+                }
+
+                $invoice->line_items = $line_items;
+                $invoice->saveQuietly();
+
+            });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};
diff --git a/tests/Feature/ProductTest.php b/tests/Feature/ProductTest.php
index 7a709e398d33..8f39621a7de9 100644
--- a/tests/Feature/ProductTest.php
+++ b/tests/Feature/ProductTest.php
@@ -11,14 +11,16 @@
 
 namespace Tests\Feature;
 
+use App\DataMapper\InvoiceItem;
+use Tests\TestCase;
+use App\Models\Invoice;
 use App\Models\Product;
+use Tests\MockAccountData;
 use App\Utils\Traits\MakesHash;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Foundation\Testing\DatabaseTransactions;
-use Illuminate\Routing\Middleware\ThrottleRequests;
 use Illuminate\Support\Facades\Session;
-use Tests\MockAccountData;
-use Tests\TestCase;
+use Illuminate\Routing\Middleware\ThrottleRequests;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
 
 /**
  * @test
@@ -49,6 +51,72 @@ class ProductTest extends TestCase
 
     }
 
+    public function testProductCostMigration()
+    {
+        $items = [];
+
+        $item = new InvoiceItem();
+        $item->product_cost = 0;
+        $item->product_key = 'test';
+        $item->quantity = 1;
+        $item->cost = 10;
+        $item->notes = 'product';
+
+        $items[] = $item;
+
+        $p = Product::factory()
+            ->create([
+                'user_id' => $this->user->id,
+                'company_id' => $this->company->id,
+                'product_key' => 'test',
+                'cost' => 10,
+                'price' => 20,
+                'quantity' => 1,
+                'notes' => 'product',
+            ]);
+
+        $i = Invoice::factory()
+                ->create([
+                    'client_id' => $this->client->id,
+                    'company_id' => $this->company->id,
+                    'user_id' => $this->user->id,
+                    'line_items' => $items,
+                ]);
+
+
+        $line_items = $i->line_items;
+
+        $this->assertEquals(0, $line_items[0]->product_cost);
+
+        Invoice::withTrashed()
+            ->where('is_deleted', false)
+            ->cursor()
+            ->each(function (Invoice $invoice) {
+
+
+                $line_items = $invoice->line_items;
+
+                foreach ($line_items as $key => $item) {
+
+                    if($item?->product_cost == 0 && $product = Product::where('company_id', $invoice->company_id)->where('product_key', $item->product_key)->where('cost', '>', 0)->first()) {
+                        $line_items[$key]->product_cost = $product->cost;
+                    }
+                }
+
+                $invoice->line_items = $line_items;
+                $invoice->saveQuietly();
+
+            });
+
+
+        $i = $i->fresh();
+        $line_items = $i->line_items;
+
+        $this->assertEquals(10, $line_items[0]->product_cost);
+
+
+    }
+
     public function testSetTaxId()
     {
         $p = Product::factory()->create([