diff --git a/app/code/Magento/QuoteGraphQl/Model/Resolver/SelectedPaymentMethod.php b/app/code/Magento/QuoteGraphQl/Model/Resolver/SelectedPaymentMethod.php
index 7a99b04638ac..8cda06eba3c9 100644
--- a/app/code/Magento/QuoteGraphQl/Model/Resolver/SelectedPaymentMethod.php
+++ b/app/code/Magento/QuoteGraphQl/Model/Resolver/SelectedPaymentMethod.php
@@ -36,6 +36,7 @@ public function resolve(Field $field, $context, ResolveInfo $info, array $value
 
         return [
             'code' => $payment->getMethod(),
+            'title' => $payment->getMethodInstance()->getTitle(),
             'purchase_order_number' => $payment->getPoNumber(),
         ];
     }
diff --git a/app/code/Magento/QuoteGraphQl/etc/schema.graphqls b/app/code/Magento/QuoteGraphQl/etc/schema.graphqls
index 6d94685ac4d0..6039a82357d3 100644
--- a/app/code/Magento/QuoteGraphQl/etc/schema.graphqls
+++ b/app/code/Magento/QuoteGraphQl/etc/schema.graphqls
@@ -244,12 +244,13 @@ type AvailableShippingMethod {
 }
 
 type AvailablePaymentMethod {
-    code: String @doc(description: "The payment method code")
-    title: String @doc(description: "The payment method title.")
+    code: String! @doc(description: "The payment method code")
+    title: String! @doc(description: "The payment method title.")
 }
 
 type SelectedPaymentMethod {
-    code: String @doc(description: "The payment method code")
+    code: String! @doc(description: "The payment method code")
+    title: String! @doc(description: "The payment method title.")
     additional_data: SelectedPaymentMethodAdditionalData @doc(description: "Additional payment data")
     purchase_order_number: String @doc(description: "The purchase order number.")
 }
diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Customer/SetOfflinePaymentMethodsOnCartTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Customer/SetOfflinePaymentMethodsOnCartTest.php
new file mode 100644
index 000000000000..0fe7aec2d634
--- /dev/null
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Customer/SetOfflinePaymentMethodsOnCartTest.php
@@ -0,0 +1,177 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Quote\Customer;
+
+use Magento\GraphQl\Quote\GetMaskedQuoteIdByReservedOrderId;
+use Magento\Integration\Api\CustomerTokenServiceInterface;
+use Magento\OfflinePayments\Model\Banktransfer;
+use Magento\OfflinePayments\Model\Cashondelivery;
+use Magento\OfflinePayments\Model\Checkmo;
+use Magento\OfflinePayments\Model\Purchaseorder;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+/**
+ * Test for setting offline payment methods on cart
+ */
+class SetOfflinePaymentMethodsOnCartTest extends GraphQlAbstract
+{
+    /**
+     * @var GetMaskedQuoteIdByReservedOrderId
+     */
+    private $getMaskedQuoteIdByReservedOrderId;
+
+    /**
+     * @var CustomerTokenServiceInterface
+     */
+    private $customerTokenService;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp()
+    {
+        $objectManager = Bootstrap::getObjectManager();
+        $this->getMaskedQuoteIdByReservedOrderId = $objectManager->get(GetMaskedQuoteIdByReservedOrderId::class);
+        $this->customerTokenService = $objectManager->get(CustomerTokenServiceInterface::class);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Customer/_files/customer.php
+     * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/customer/create_empty_cart.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/add_simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/set_new_shipping_address.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/enable_offline_payment_methods.php
+     *
+     * @param string $methodCode
+     * @param string $methodTitle
+     * @dataProvider offlinePaymentMethodDataProvider
+     */
+    public function testSetOfflinePaymentMethod(string $methodCode, string $methodTitle)
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+
+        $query = $this->getQuery($maskedQuoteId, $methodCode);
+        $response = $this->graphQlMutation($query, [], '', $this->getHeaderMap());
+
+        self::assertArrayHasKey('setPaymentMethodOnCart', $response);
+        self::assertArrayHasKey('cart', $response['setPaymentMethodOnCart']);
+        self::assertArrayHasKey('selected_payment_method', $response['setPaymentMethodOnCart']['cart']);
+
+        $selectedPaymentMethod = $response['setPaymentMethodOnCart']['cart']['selected_payment_method'];
+        self::assertArrayHasKey('code', $selectedPaymentMethod);
+        self::assertEquals($methodCode, $selectedPaymentMethod['code']);
+
+        self::assertArrayHasKey('title', $selectedPaymentMethod);
+        self::assertEquals($methodTitle, $selectedPaymentMethod['title']);
+    }
+
+    /**
+     * @return array
+     */
+    public function offlinePaymentMethodDataProvider(): array
+    {
+        return [
+            'check_mo' => [Checkmo::PAYMENT_METHOD_CHECKMO_CODE, 'Check / Money order'],
+            'bank_transfer' => [Banktransfer::PAYMENT_METHOD_BANKTRANSFER_CODE, 'Bank Transfer Payment'],
+            'cash_on_delivery' => [Cashondelivery::PAYMENT_METHOD_CASHONDELIVERY_CODE, 'Cash On Delivery'],
+        ];
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Customer/_files/customer.php
+     * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/customer/create_empty_cart.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/add_simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/set_new_shipping_address.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/enable_offline_payment_methods.php
+     */
+    public function testSetPurchaseOrderPaymentMethod()
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+        $methodTitle = 'Purchase Order';
+        $methodCode = Purchaseorder::PAYMENT_METHOD_PURCHASEORDER_CODE;
+        $poNumber = 'abc123';
+
+        $query = <<<QUERY
+mutation {
+  setPaymentMethodOnCart(input: {
+    cart_id: "{$maskedQuoteId}", 
+    payment_method: {
+      code: "{$methodCode}"
+      purchase_order_number: "{$poNumber}"
+    }
+  }) {
+    cart {
+      selected_payment_method {
+        code
+        title
+        purchase_order_number
+      }
+    }
+  }
+}
+QUERY;
+        $response = $this->graphQlMutation($query, [], '', $this->getHeaderMap());
+
+        self::assertArrayHasKey('setPaymentMethodOnCart', $response);
+        self::assertArrayHasKey('cart', $response['setPaymentMethodOnCart']);
+        self::assertArrayHasKey('selected_payment_method', $response['setPaymentMethodOnCart']['cart']);
+
+        $selectedPaymentMethod = $response['setPaymentMethodOnCart']['cart']['selected_payment_method'];
+        self::assertArrayHasKey('code', $selectedPaymentMethod);
+        self::assertEquals($methodCode, $selectedPaymentMethod['code']);
+
+        self::assertArrayHasKey('title', $selectedPaymentMethod);
+        self::assertEquals($methodTitle, $selectedPaymentMethod['title']);
+
+        self::assertArrayHasKey('purchase_order_number', $selectedPaymentMethod);
+        self::assertEquals($poNumber, $selectedPaymentMethod['purchase_order_number']);
+    }
+
+    /**
+     * @param string $maskedQuoteId
+     * @param string $methodCode
+     * @return string
+     */
+    private function getQuery(
+        string $maskedQuoteId,
+        string $methodCode
+    ) : string {
+        return <<<QUERY
+mutation {
+  setPaymentMethodOnCart(input: {
+    cart_id: "{$maskedQuoteId}", 
+    payment_method: {
+      code: "{$methodCode}"
+    }
+  }) {
+    cart {
+      selected_payment_method {
+        code
+        title
+      }
+    }
+  }
+}
+QUERY;
+    }
+
+    /**
+     * @param string $username
+     * @param string $password
+     * @return array
+     */
+    private function getHeaderMap(string $username = 'customer@example.com', string $password = 'password'): array
+    {
+        $customerToken = $this->customerTokenService->createCustomerAccessToken($username, $password);
+        $headerMap = ['Authorization' => 'Bearer ' . $customerToken];
+        return $headerMap;
+    }
+}
diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Guest/SetOfflinePaymentMethodsOnCartTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Guest/SetOfflinePaymentMethodsOnCartTest.php
new file mode 100644
index 000000000000..7ec3148ea85a
--- /dev/null
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/Guest/SetOfflinePaymentMethodsOnCartTest.php
@@ -0,0 +1,157 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Quote\Guest;
+
+use Magento\GraphQl\Quote\GetMaskedQuoteIdByReservedOrderId;
+use Magento\OfflinePayments\Model\Banktransfer;
+use Magento\OfflinePayments\Model\Cashondelivery;
+use Magento\OfflinePayments\Model\Checkmo;
+use Magento\OfflinePayments\Model\Purchaseorder;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+/**
+ * Test for setting offline payment methods on cart
+ */
+class SetOfflinePaymentMethodsOnCartTest extends GraphQlAbstract
+{
+    /**
+     * @var GetMaskedQuoteIdByReservedOrderId
+     */
+    private $getMaskedQuoteIdByReservedOrderId;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp()
+    {
+        $objectManager = Bootstrap::getObjectManager();
+        $this->getMaskedQuoteIdByReservedOrderId = $objectManager->get(GetMaskedQuoteIdByReservedOrderId::class);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/guest/create_empty_cart.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/add_simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/set_new_shipping_address.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/enable_offline_payment_methods.php
+     *
+     * @param string $methodCode
+     * @param string $methodTitle
+     * @dataProvider offlinePaymentMethodDataProvider
+     */
+    public function testSetOfflinePaymentMethod(string $methodCode, string $methodTitle)
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+
+        $query = $this->getQuery($maskedQuoteId, $methodCode);
+        $response = $this->graphQlMutation($query);
+
+        self::assertArrayHasKey('setPaymentMethodOnCart', $response);
+        self::assertArrayHasKey('cart', $response['setPaymentMethodOnCart']);
+        self::assertArrayHasKey('selected_payment_method', $response['setPaymentMethodOnCart']['cart']);
+
+        $selectedPaymentMethod = $response['setPaymentMethodOnCart']['cart']['selected_payment_method'];
+        self::assertArrayHasKey('code', $selectedPaymentMethod);
+        self::assertEquals($methodCode, $selectedPaymentMethod['code']);
+
+        self::assertArrayHasKey('title', $selectedPaymentMethod);
+        self::assertEquals($methodTitle, $selectedPaymentMethod['title']);
+    }
+
+    /**
+     * @return array
+     */
+    public function offlinePaymentMethodDataProvider(): array
+    {
+        return [
+            'check_mo' => [Checkmo::PAYMENT_METHOD_CHECKMO_CODE, 'Check / Money order'],
+            'bank_transfer' => [Banktransfer::PAYMENT_METHOD_BANKTRANSFER_CODE, 'Bank Transfer Payment'],
+            'cash_on_delivery' => [Cashondelivery::PAYMENT_METHOD_CASHONDELIVERY_CODE, 'Cash On Delivery'],
+        ];
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/guest/create_empty_cart.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/add_simple_product.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/set_new_shipping_address.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/enable_offline_payment_methods.php
+     */
+    public function testSetPurchaseOrderPaymentMethod()
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+        $methodCode = Purchaseorder::PAYMENT_METHOD_PURCHASEORDER_CODE;
+        $methodTitle = 'Purchase Order';
+        $poNumber = 'abc123';
+
+        $query = <<<QUERY
+mutation {
+  setPaymentMethodOnCart(input: {
+    cart_id: "{$maskedQuoteId}", 
+    payment_method: {
+      code: "{$methodCode}"
+      purchase_order_number: "{$poNumber}"
+    }
+  }) {
+    cart {
+      selected_payment_method {
+        code
+        title
+        purchase_order_number
+      }
+    }
+  }
+}
+QUERY;
+
+        $response = $this->graphQlMutation($query);
+
+        self::assertArrayHasKey('setPaymentMethodOnCart', $response);
+        self::assertArrayHasKey('cart', $response['setPaymentMethodOnCart']);
+        self::assertArrayHasKey('selected_payment_method', $response['setPaymentMethodOnCart']['cart']);
+
+        $selectedPaymentMethod = $response['setPaymentMethodOnCart']['cart']['selected_payment_method'];
+        self::assertArrayHasKey('code', $selectedPaymentMethod);
+        self::assertEquals($methodCode, $selectedPaymentMethod['code']);
+
+        self::assertArrayHasKey('title', $selectedPaymentMethod);
+        self::assertEquals($methodTitle, $selectedPaymentMethod['title']);
+
+        self::assertArrayHasKey('purchase_order_number', $selectedPaymentMethod);
+        self::assertEquals($poNumber, $selectedPaymentMethod['purchase_order_number']);
+    }
+
+    /**
+     * @param string $maskedQuoteId
+     * @param string $methodCode
+     * @return string
+     */
+    private function getQuery(
+        string $maskedQuoteId,
+        string $methodCode
+    ) : string {
+        return <<<QUERY
+mutation {
+  setPaymentMethodOnCart(input: {
+    cart_id: "{$maskedQuoteId}", 
+    payment_method: {
+      code: "{$methodCode}"
+    }
+  }) {
+    cart {
+      selected_payment_method {
+        code
+        title
+      }
+    }
+  }
+}
+QUERY;
+    }
+}