Hi there, @ian12.
Yes, there are corresponding fees per transaction if you use online payments. And there are two types of them. One is the GoCardless, and the other one is the PayPal payments. Each of them had a different rate of fees per transaction. If you want to sign up for the online payments, you can go to this link and choose the right type for your business.
If you're ready to use online payments, feel free to read this article to learn how to manage customer payments for online invoices: Take and process payments in QuickBooks Online.
Please know that I'm just a reply away if you need any further assistance signing up for online payments. Have a great day ahead!
