If you use gateways that are not Shopify Payments, a so-called external payment gateway fee will be added. This fee is correlated with the selected subscription plan. The higher the plan, the lower the fee. In the lowest Shopify plan, this cost is 2% of the transaction, and in the Shopify Advanced plan it is 0.6%. In the case of Shopify Plus, it is 0.2% of each transaction. This transaction fee is added to the commission we pay to a given payment operator. In the case of Poland, we have official Shopify integration with Przelewy24, PayPo, imoje, and Tpay.