How to add Klarna payment slice code in Shopify products?

Topic summary

Main issue: Adding Klarna’s “Pay in 3” on-site messaging and enabling Klarna as a live payment option in a Shopify store.

  • Solution for messaging: Use Klarna’s free On-site Messaging app to display installment information without coding (link provided).
  • Remaining challenge: Making the Klarna payment gateway active. The store owner reports failed setup attempts in Shopify and difficulty with a third-party app requesting tax documents, which is problematic as they’ve just started and aren’t trading as a company.
  • Guidance provided: Official Klarna documentation to install Klarna as an alternative payment method in Shopify and a direct support email for assistance.

Status: No confirmed resolution. Next steps are to follow the installation guide and contact Klarna support. Unanswered: Specific cause of the Shopify setup failure and whether any merchant verification requirements apply to this case.

Summarized with AI on February 21. AI used: gpt-5.

Hi

I have recently added Klarna to my store and wanted to add the code that slices the payments in 3 (the one that comes up saying so next to the klarna icon) - I cant seem to find this code anywhere - can anyone help at all please?

Thanks

Emma

Hi @hipstercoffeeuk (Emma),

Klarna has a free On-site messaging app to this messaging to your store without any coding:

https://apps.shopify.com/klarna-on-site-messaging

and a great team to support if you need any help: skosm@klarna.com

Hi

I have set this up but how do I actually have the payment gateway live on my site? I have tried setting it up in shopify and it wont work at all. Ive tried using a 3rd party app too and they are asking for tax docs now when Im not even trading as a company (and have only just started out) - I have to say the integration is very hard to do…

I’m sorry you are find this difficult. Hopefully this documentation helps for how to install Klarna as an alternative payment method in Shopify:

https://docs.klarna.com/platform-solutions/shopify/payments/installing-klarna-payments-as-an-alternative-payment-method-on-shopify-hpsdk/

and our support team is available to help more directly if you email skosm@klarna.com