At this time, it is not possible to charge additional fees should a customer choose an alternative payment method. If you’re seeing a lot of orders processed through Klarna and/or you’re seeing an increase in return orders, then you could consider working these costs into the product pricing. An increase in the product pricing will help you recuperate the costs you’re losing, while still being able to offer Klarna and free shipping. Alternatively, you could also impose a return shipping fee, while still offering free shipping. That may deter customers from purchasing multiple sizes. An accurate sizing guide for your clothing would also help with reducing the number of returns you see.
Topic summary
Ability to add surcharges for specific payment methods (e.g., Klarna “pay later”) is not supported. The merchant faces higher fees and losses with free shipping and multi-size returns, especially common in the Netherlands.
Official guidance: you cannot charge extra at checkout based on payment method. Suggested alternatives include increasing product prices, adding a return shipping fee while keeping free shipping, and providing an accurate sizing guide to reduce returns.
Workaround proposed: create a separate “handling fee” product and collection, use a checkbox app to let customers add the fee on the product page, and apply a payment-rule app to hide certain payment methods when that collection item isn’t in the cart. This approach is more complex but reportedly works; links to third‑party apps are central.
Outcome: No native solution or policy change; only pricing/return policy strategies and an app-based workaround. The thread remains open with no definitive platform-level resolution.