diff --git a/app/Services/PurchaseOrder/PurchaseOrderService.php b/app/Services/PurchaseOrder/PurchaseOrderService.php
new file mode 100644
index 000000000000..ffb2cb84d164
--- /dev/null
+++ b/app/Services/PurchaseOrder/PurchaseOrderService.php
@@ -0,0 +1,57 @@
+<?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\Services\PurchaseOrder;
+
+
+use App\Models\PurchaseOrder;
+use App\Utils\Traits\MakesHash;
+
+class PurchaseOrderService
+{
+    use MakesHash;
+
+    public PurchaseOrder $purchase_order;
+
+    public function __construct($purchase_order)
+    {
+        $this->purchase_order = $purchase_order;
+    }
+
+    /**
+     * Saves the purchase order.
+     * @return \App\Models\PurchaseOrder object
+     */
+    public function save(): ?PurchaseOrder
+    {
+        $this->purchase_order->saveQuietly();
+
+        return $this->purchase_order;
+    }
+
+    public function fillDefaults()
+    {
+        $settings = $this->purchase_order->client->getMergedSettings();
+
+        //TODO implement design, footer, terms
+
+
+        /* If client currency differs from the company default currency, then insert the client exchange rate on the model.*/
+        if (!isset($this->purchase_order->exchange_rate) && $this->purchase_order->client->currency()->id != (int)$this->purchase_order->company->settings->currency_id)
+            $this->purchase_order->exchange_rate = $this->purchase_order->client->currency()->exchange_rate;
+
+        if (!isset($this->purchase_order->public_notes))
+            $this->purchase_order->public_notes = $this->purchase_order->client->public_notes;
+
+
+        return $this;
+    }
+}