Billing: Does JotForm charge a fee for payments?

Also, we would like to use the option to accept payment through our form using square. Is there an additional fee from jotform to use this feature?

JotForm does not charge any fee for payments, but there is a limit on the number of monthly payments you can receive through your forms, please check the limits on our pricing page: https://www.jotform.com/pricing 

If you have questions, let us know.