Pass Credit Card, PayPal, Klarna & Other Payment Processing Fees to Customers on Shopify

Credit Card Surcharges: Credit card surcharges are additional charges of 1.5–4% added at checkout when customers pay by credit card. Many merchants also add surcharges for other payment methods (PayPal, Klarna, and other alternative payment methods) where permitted. Rules vary by country: the UK and EU ban surcharges on card (and in the UK, PayPal) payments; Australia allows them but caps them at the merchant's cost of acceptance; the US and Canada generally permit them with disclosure. Merchants must comply with local regulations and payment provider terms.

Express Checkout Limitation: Express checkout buttons (Apple Pay, Shop Pay, Google Pay) let customers buy with one tap from the product page or cart, skipping the standard add-to-cart flow. Because these methods bypass the product page and sometimes the cart entirely, any app feature that relies on frontend injection — fee consent popups, required product fields, address validation, vacation mode blocks — is bypassed. Customers using express checkout won't see location confirmation modals, won't fill required personalization fields, and can place orders even when vacation mode is on. This is a Shopify platform constraint, not an app bug. To ensure your rules apply, consider disabling dynamic checkout buttons on products where compliance or data collection is critical.