diff --git a/app/Transformers/PurchaseOrderTransformer.php b/app/Transformers/PurchaseOrderTransformer.php
new file mode 100644
index 0000000000..aef5ea1d65
--- /dev/null
+++ b/app/Transformers/PurchaseOrderTransformer.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2022. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
+
+namespace App\Transformers;
+
+
+use App\Models\PurchaseOrder;
+use App\Utils\Traits\MakesHash;
+
+class PurchaseOrderTransformer extends EntityTransformer
+{
+    use MakesHash;
+
+    public function transform(PurchaseOrder $purchase_order)
+    {
+        return [
+            'id' => $this->encodePrimaryKey($purchase_order->id),
+            'user_id' => $this->encodePrimaryKey($purchase_order->user_id),
+            'project_id' => $this->encodePrimaryKey($purchase_order->project_id),
+            'assigned_user_id' => $this->encodePrimaryKey($purchase_order->assigned_user_id),
+            'vendor_id' => (string) $this->encodePrimaryKey($purchase_order->vendor_id),
+            'amount' => (float) $purchase_order->amount,
+            'balance' => (float) $purchase_order->balance,
+            'client_id' => (string) $this->encodePrimaryKey($purchase_order->client_id),
+            'vendor_id' => (string) $this->encodePrimaryKey($purchase_order->vendor_id),
+            'status_id' => (string) ($purchase_order->status_id ?: 1),
+            'design_id' => (string) $this->encodePrimaryKey($purchase_order->design_id),
+            'created_at' => (int) $purchase_order->created_at,
+            'updated_at' => (int) $purchase_order->updated_at,
+            'archived_at' => (int) $purchase_order->deleted_at,
+            'is_deleted' => (bool) $purchase_order->is_deleted,
+            'number' => $purchase_order->number ?: '',
+            'discount' => (float) $purchase_order->discount,
+            'po_number' => $purchase_order->po_number ?: '',
+            'date' => $purchase_order->date ?: '',
+            'last_sent_date' => $purchase_order->last_sent_date ?: '',
+            'next_send_date' => $purchase_order->next_send_date ?: '',
+            'reminder1_sent' => $purchase_order->reminder1_sent ?: '',
+            'reminder2_sent' => $purchase_order->reminder2_sent ?: '',
+            'reminder3_sent' => $purchase_order->reminder3_sent ?: '',
+            'reminder_last_sent' => $purchase_order->reminder_last_sent ?: '',
+            'due_date' => $purchase_order->due_date ?: '',
+            'terms' => $purchase_order->terms ?: '',
+            'public_notes' => $purchase_order->public_notes ?: '',
+            'private_notes' => $purchase_order->private_notes ?: '',
+            'uses_inclusive_taxes' => (bool) $purchase_order->uses_inclusive_taxes,
+            'tax_name1' => $purchase_order->tax_name1 ? $purchase_order->tax_name1 : '',
+            'tax_rate1' => (float) $purchase_order->tax_rate1,
+            'tax_name2' => $purchase_order->tax_name2 ? $purchase_order->tax_name2 : '',
+            'tax_rate2' => (float) $purchase_order->tax_rate2,
+            'tax_name3' => $purchase_order->tax_name3 ? $purchase_order->tax_name3 : '',
+            'tax_rate3' => (float) $purchase_order->tax_rate3,
+            'total_taxes' => (float) $purchase_order->total_taxes,
+            'is_amount_discount' => (bool) ($purchase_order->is_amount_discount ?: false),
+            'footer' => $purchase_order->footer ?: '',
+            'partial' => (float) ($purchase_order->partial ?: 0.0),
+            'partial_due_date' => $purchase_order->partial_due_date ?: '',
+            'custom_value1' => (string) $purchase_order->custom_value1 ?: '',
+            'custom_value2' => (string) $purchase_order->custom_value2 ?: '',
+            'custom_value3' => (string) $purchase_order->custom_value3 ?: '',
+            'custom_value4' => (string) $purchase_order->custom_value4 ?: '',
+            'has_tasks' => (bool) $purchase_order->has_tasks,
+            'has_expenses' => (bool) $purchase_order->has_expenses,
+            'custom_surcharge1' => (float) $purchase_order->custom_surcharge1,
+            'custom_surcharge2' => (float) $purchase_order->custom_surcharge2,
+            'custom_surcharge3' => (float) $purchase_order->custom_surcharge3,
+            'custom_surcharge4' => (float) $purchase_order->custom_surcharge4,
+            'custom_surcharge_tax1' => (bool) $purchase_order->custom_surcharge_tax1,
+            'custom_surcharge_tax2' => (bool) $purchase_order->custom_surcharge_tax2,
+            'custom_surcharge_tax3' => (bool) $purchase_order->custom_surcharge_tax3,
+            'custom_surcharge_tax4' => (bool) $purchase_order->custom_surcharge_tax4,
+            'line_items' => $purchase_order->line_items ?: (array) [],
+            'entity_type' => 'credit',
+            'exchange_rate' => (float) $purchase_order->exchange_rate,
+            'paid_to_date' => (float) $purchase_order->paid_to_date,
+            'subscription_id' => $this->encodePrimaryKey($purchase_order->subscription_id),
+        ];
+    }
+
+}