Note: Before you begin, make sure that you have entered the invoice recipient's payment details in their contact record. Learn how.
Go to Sales > Invoices.
Find the invoice you wish to charge for and open it.
Scroll to the bottom of the page and click Charge Customer.
a. Choose the described Credit Card to charge.
b. Add an Invoice Note if applicable.
You have now successfully charged a client for their invoice using their payment information on file.
Idea: Did you know you can create auto recharges if a payment fails? Take advantage of recurring invoices here to use this feature. Learn more about recurring invoices.