Klarna + BigCommerce.

Combining enterprise functionality, an open architecture and app ecosystem, and market-leading performance, BigCommerce enables businesses to grow online sales. Adding Klarna to your store leads to increased average order size and conversions and gives your customers flexible interest-free payment options.

Getting started with Klarna in your BigCommerce store is easy.

Sign up with Klarna

Already have a BigCommerce store? Sign up with Klarna to add flexible payment options.

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Integrate smooothly

Once you’re a Klarna retailer, integrating takes almost no time.

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Add On-site Messaging

Boost your business by adding On-site messaging to your shop.

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How do I get set up?

After signing up as a Klarna retailer, integration is easy as 1, 2, 3.

1. Sign up with Klarna

To get started, create a merchant account and sign up with Klarna.

Get started

2.Get & save your Klarna API credentials

Generate new API credentials by going to Settings in the Merchant portal. Download and open the file, you'll need these API credentials for the next part.

Generate API credentials

3. Connect Klarna Payments & BigCommerce

Go to your Store Setup and choose Payments. Next, expand the Online Payment Methods section. Then choose Klarna Payments and enter your API credentials. To add Klarna you must be using Optimized One-Page Checkout, BigCommerce’s default checkout and order confirmation page.

Set up Klarna

4. Place a trial purchase

Check out the smoooth experience by buying an item with Klarna from your store. After placing the order, go to Orders in Merchant portal, and cancel the order (make sure you don’t pay yourself)!

Merchant portal

5. Boost your sales

Use On-site messaging to show your shoppers Klarna payment methods are available throughout the shopping journey. Your customers will see tailored messaging, and you see an increase in your average order value.

Learn more

Get the full integration guide here.

Get the guide

Payment methods that boost sales.

Klarna retailers see a 45% average AOV increase.

Pay in 30 days

Offer an extra 30 days to pay.

Let your customers try before they buy by offering an extra 30 days to complete their payment. No fees.


Offer up to 36 months to pay.

Give your customers the flexible option to buy now and spread the cost with monthly payments.

Take the first step to smooth shopping and add Klarna to your store.