Shift4Shop is free for all business owners. They are able to keep it free by having shop owners automatically opt-in to their payment processor – Shift4. The processing fees associated with Shift4 are 2.9% + 30 cents per transaction. However, these can be negotiated if you’re a larger-scale enterprise considering making Shift4Shop your main e-commerce platform of choice. You can speak to a sales & onboarding representative for more information. Other than the transaction cost, your store will not have any other associated costs or monthly fees.