The Klarna checkout extension provides a checkout solution with a broad set of options. The extension replaces the original checkout. The main features supported by Klarna checkout in the extension are:

• Support of all payment methods in each Klarna market
• General checkout configuration
• Pre-filled address for a one-click checkout experience
• Customized checkboxes
• Business to business (B2B) (business to business)
• Shipping assistant
• Extra merchant data (EMD) 
• Merchant references
• Flexible design

The following features aren’t currently supported:

• Recurring payments and tokenization
• Store views for multi-currency support

For more information about Klarna checkout, refer to the dedicated section of our product documentation.

Prerequisite: When using the Klarna m2-klarna Adobe Commerce extension, for a direct integration of Klarna Checkout, you will need a Klarna merchant account, for which you can sign up here.

​​The Klarna extension allows the use of all Klarna’s payment methods. The payment methods are shown and can be used in the store as long as Klarna provides these in the respective markets and these payment methods are part of the merchant’s contract. Klarna handles the configuration of the payment methods, so you don’t need to configure individual payment method settings in the shop or in the extension. Based on it there is no need to do any configuration in the shop or on the extension.

You can configure the checkout experience to suit your store’s needs. Here are some of Klarna checkout settings you can adjust:

• Definition of mandatory fields
• Position of the shipping methods: inside or outside Klarna checkout 
• Shipping address can be the same or separate from the billing address
• URL indication for the terms and conditions and other URLs
• Allowing a set of customer types who are allowed to checkout
• The list of shipping countries that are usable on the checkout
• Non-Klarna payment methods

You can find these settings in Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout.

When a customer places an order through Klarna checkout, the address they use is remembered for their next visit to the checkout page. This means they won't have to enter their address again, giving them a one-click checkout experience. 

There's one exception, though: If the customer is logged in and has a saved address in their account, that address will be used instead.

To enable pre-filling the address, go to Stores > Configuration > Sales > PaymentMethods > Klarna > Klarna Checkout > Pre-fill Options.

You can define and configure checkboxes inside Klarna checkout to perform a specific action when the checkbox is selected and the order is placed. By default, two actions can be performed: newsletter signup and creating an account. Other actions can be defined, but require implementing a logic.

To configure the checkboxes, go to Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout > Added Checkbox Options.

Klarna checkout allows business to business (B2B) purchases. The following updates are required for B2B purchases to work:

1. B2B must be enabled by Klarna for the Merchant ID (MID).
2. You have to enable B2B in the Admin. You can find the configuration option in Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout > Checkout General Settings.

Shipping assistant adds a shipping selector to Klarna checkout. Before you can use Shipping assistance in your store, it must be enabled for the Merchant ID (MID) and the shop. A contract with a transport management system (TMS) partner is also required. 

To learn more about Shipping assistance, refer to the product documentation.

In some cases, we require additional information regarding the customer and the purchase in order to make a correct risk assessment. This information, called extra merchant data (EMD), may consist of data about the customer performing the transaction, the product/services associated with the transaction, or the seller and their affiliates.

The following method returns the request instance, which is later converted to an array and sent as a request to Klarna:

\Klarna\Kco\Model\Api\Builder\Kasper::getRequest()

To add EMD, create an after plugin on this method and add the respective information.

To include merchant_reference1 and merchant_reference2 data fields, for example, to match the order's merchant references as included in Klarna's settlement files, you can create an after plugin for the \Klarna\Orderlines\Model\Container\Parameter::getMerchantReferences method.

public function getMerchantReferences(CartInterface $quote)
    {
        $merchantReferences = $this->dataObjectFactory->create([
            'data' => [
                'merchant_reference_1' => $quote->getReservedOrderId(),
                'merchant_reference_2' => ''
            ]
        ]);

        return $merchantReferences;

Adobe Commerce provides a default design for Klarna elements displayed in the checkout. Since each store can have a different look and feel, the default checkout design may not go well with your store’s theme. The extension lets you change some elements of the default design.
To edit the design settings in the Admin, go to Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout > Design:

Integrate Klarna checkout quickly by changing a few settings in the Admin. For further configuration, use advanced options as needed.

The Klarna checkout module is also extensible and allows merchants to easily enhance and customize certain features to fit specific needs.

After installation of the Klarna checkout module, you need to adjust a few settings to enable Klarna checkout.

These settings can be found by following the Admin navigation path of: Stores > Configuration > Sales > Payment Methods > Klarna > Klarna API.

Additional options can be configured for Klarna checkout to adjust checkout behavior. You can find these settings in the Admin under the following paths:

• Stores > Configuration > Sales > Checkout > Klarna Checkout
• Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout

Restriction of checkout by customer group

Klarna checkout can be restricted to select customer groups.

To restrict Klarna checkout from selected customer groups, select the groups in the Admin. All non-selected groups will be presented with your existing checkout. If no groups are selected, all customers will be directed to Klarna checkout.

External payment methods

Alternative payment methods can be displayed within Klarna checkout as an alternative to Klarna’s standard offering. These options will appear when the customer chooses a payment method before completing the purchase.

Note that only certain external payment methods are supported by Klarna checkout (e.g. PayPal, Vipps, and more)

Klarna checkout won't appear until the payment method is enabled. The Klarna checkout module has several additional features that you can enable and configure to modify the checkout experience.

Payment configuration

Payment settings is configured in the Admin under the following path:

Stores > Configuration > Sales > Payment Methods > Klarna > Klarna Checkout

Checkout options

You can configure checkout options under the following path in the Admin:

Stores > Configuration > Sales > Checkout > Klarna Checkout Options

Checkout design

Checkout design options can be configured under the following path in the Admin:

Stores > Configuration > Sales > Checkout > Klarna Checkout Design

In this menu, CSS hex colors are used, for example, #FF9900.