Customers have the ability to pay their balance's online.
They can do this by logging into their customer portal the customer portal is your companyid.schedule.online.
On the left side of the screen select All Invoices.
This will open all of the invoices and any invoices with a balance due will be listed at the top. They can select Pay. In the full list of invoices there is also a pay balance due option the customer can select.
A Payment Pop Up will open where they can enter the amount they would like to pay if less than the total balance, their payment information, and select to save the method on file.