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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.

Integrate smooothly

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

Add On-site Messaging

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

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, you’ll need to create a merchant account and sign up with Klarna.

2. Get & save your Klarna API credential

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

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.

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)!

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.

Get the full integration guide here.

Payment methods that boost sales.

Klarna retailers see a 45% average AOV increase.

Pay in 4 Installments

4 interest-free payments.

Give shoppers the freedom to spread the cost interest-free over time. You get paid immediately and shoppers get a flexible plan.


Offer up to 24 months to pay.

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

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.

Klarna On-site messaging

On-site messaging

Sell even more with Klarna.

On-site messaging continues the smooth journey, increasing risk-free sales through tailored messaging and showing your customers available payment plans while they’re still shopping.

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

Monthly financing through Klarna and One-time card bi-weekly payments with a service fee to shop anywhere in the Klarna App issued by WebBank. Other CA resident loans at select merchants made or arranged pursuant to a California Financing Law license. Copyright © 2005-2024 Klarna Inc. NMLS #1353190, 800 N. High Street Columbus, OH 43215. VT Consumers: For WebBank Loan Products (One-Time Cards, Financing, Klarna Card): THIS IS A LOAN SOLICITATION ONLY. KLARNA INC. IS NOT THE LENDER. INFORMATION RECEIVED WILL BE SHARED WITH ONE OR MORE THIRD PARTIES IN CONNECTION WITH YOUR LOAN INQUIRY. THE LENDER MAY NOT BE SUBJECT TO ALL VERMONT LENDING LAWS. THE LENDER MAY BE SUBJECT TO FEDERAL LENDING LAWS.