In Reports › Booking Trends › Payment, you can see a break down of what payment methods are used the most as well as the average size of payments in a given month, and payments broken down by contacts.
See the Payer Totals sections to see who your top clients are!
You can use the filters at the side to narrow down the report by time period, brand, job type, source and payment method.
You can find the Payment report in the Booking Trends section here in Reports.
NOTE: In order to view this type of financial information, you must be an administrator user.