Shopify takes a transaction fee for each sale made on their platform. The transaction fee varies depending on the pricing plan you are on. For the Basic Shopify plan, the transaction fee is 2.9% + 30¢ per transaction. The fee decreases for the Shopify plan to 2.6% + 30¢ per transaction, and for the Advanced Shopify plan, it is 2.4% + 30¢ per transaction. However, if you use Shopify Payments as your payment gateway, you can avoid these transaction fees altogether.
