
This service makes it possible for you to enable Klarna's most popular payment options as well as the payment page managed by Klarna in your online store.
Klarna Payments payment processing functions are available in the admin panel. Also, changes made to payment amounts in the Klarna portal are transmitted to the admin panel.
Features of the Klarna Payments service:
- Klarna's payment options:
- Pay later
- Slice it
- credit card and online banking payments (contact Klarna Merchant Support if you wish to disable credit card and online banking payments)
- Activating payments in your online store's admin panel
- Extending payment expiry dates in the online store's admin panel
- Returning payments in your online store's admin panel
- Secure and easy-to-use checkout page managed by Klarna
- payment in euros or Swedish kronor.
Read more on Klarna's own website.
Klarna Payments options are also included in the Kustom Checkout solution, which completely replaces the default checkout of the online store.
Pricing
Klarna charges for the use of the service according to its own price list.
Limitations
Klarna's terms of use impose the following restrictions on using Klarna as a payment method in online shopping:
- At the online store checkout, other online payment services cannot be offered alongside Klarna.
However, Klarna's terms of use allow the use of alternative payment methods (e.g., MyCashflow Invoice) if Klarna is unavailable due to a disruption.
- Klarna Payments cannot be used in connection with the following product categories and business areas:
- Tobacco products
- E-cigarettes
- Weapons and ammunition
- medications (over-the-counter and prescription)
- Travel packages
- Event and ticket sales
- Marketplace ecommerce
- Rentals (unless as main area of business)
- drop-shipping
Paying with Klarna Payments services
When the customer has selected the Klarna Payments method and confirmed the order, the Klarna payment page opens.

On the payment page, the customer can select the desired Klarna payment option and finalize the order. After this, the customer returns to the online store.
Once the customer has made the payment, it must be activated in the admin panel during the order processing. See the instructions for activating Klarna payments. After activation, Klarna transfers the payment to the online store's bank account.
Installation and setup
If you are not yet a Klarna user, first order the service from the admin panel's page. The order form is below the payment form.
Once you have received your Klarna credentials, you can create a new payment method for your online shop using Klarna Payments:
Klarna's Merchant Portal
Information about all orders using the Klarna Payments service is transmitted to the Klarna Merchant Portal, where you can, among other things
- edit the design of the Klarna Payments checkout page
- edit store information visible to the customer
- download payment reports
If you edit payments in the Merchant Portal, you must check payment statuses in your online store's admin panel so that they match both in Klarna and MyCashflow.
Activating payments
In order for Klarna to transfer the payment to the online store's bank account, the payment must be activated.
Payments must be activated before they expire.
Klarna payments expire after a certain period of time. The payment expiration date is shown on the order page's Payment transactionssection and on the Klarna Merchant Portal's page.
If the payment is overdue, it is not possible to complete the order using Klarna . However, you can create a new payment transaction for the order using a different payment method.
When necessary, you can also extend the order expiry date.
Once you have opened the desired order from the admin panel's page, you have the following options to activate the payment:
If the order is paid in a currency other than the euro, the transactions will also show the exchange rate.
Extending the order expiry date
If you cannot activate a payment within the default time, you can extend the order expiry date either
- In the payment details on the page of the Klarna Merchant Portal or
- via the order's Payment transactions menu in the admin panel.
Canceling reservations
If a customer has made an unwarranted payment, you can cancel it in the online store's admin panel even before activation by selecting the Cancel reservation option from the Payment transactions menu on the right side of the order page.
When you cancel a customer's reservation, the payment status changes to Cancelled. In such a case, the customer won't be charged at all.
Checking the status of payments that have not been approved.
If a payment is overdue or the subscription is canceled, the payment will automatically move to Cancelled status. In certain cases, it may be possible to change the payment status in the Klarna merchant portal.
You can ensure that the payment status on the subscription page of the admin panel is up to date by clicking the Check payment status link in the transaction tool menu:

The payment status updates immediately.
Resending payment instructions
Editing order products
In orders paid with Kustom Checkout, it is possible to modify the product content depending on the customer's country and the payment method used for the order. Orders paid with Klarna payment methods are subject to certain restrictions, which are outlined below.
The payment method used by the customer appears in the Payment transactions drop-down menu on the right side of the order page.
Depending on the customer's country and the payment method used, the following changes to the order are possible beforethe activation of payments:
- modifying product prices, quantities, and tax rates
- adding and editing products
- modifying delivery and payment costs
- modifying the order discounts.
In some situations, Klarna rejects changes if they would increase the order total.
Klarna reviews the changes you make and approves or rejects them based on the customer's credit information. The inspection takes place immediately, and the Klarna system returns the result as soon as you have modified the order's product content. After approval, the amount to be paid and the order details in the Klarna merchant portal are updated automatically.
After activating the payment, you can freely edit the prices, quantities, and tax rates of order products. Activation of payments is only possible if the amounts match in the admin panel and in the Klarna merchant portal.
When you add products to the order, you must create a new transaction for the changed order amount using a service other than Klarna . When you remove or return products, you can refund Klarna payments directly from the order page.
Editing Payments in the Klarna Merchant Portal
You can also edit payment amounts in the Klarna merchant portal, and the changes will automatically update in your admin panel.
Only the payment amount can be modified in the Klarna merchant portal. Changes made to individual product lines in the merchant portal do not update in the online store.
Refunds
You can refund payments made with Klarna Payments to the customer directly from the order page in the admin panel. Refunds are always processed automatically using the same payment method the customer used for the transaction.
Making a full refund
If you want to charge the customer, for example, return fees, do not use a full refund, even if the customer returns the entire order.
Here's how to refund the whole payment to the customer:
Klarna refunds the customer in full using the original payment method.
Making a partial refund
If a customer returns only part of the products they ordered, you can refund the necessary portion of the customer's payment directly from the order page in the admin panel.
Klarna returns the amount you specified to the customer using the original payment method.




