The Onsite system stores the average number of days it takes for a customer to pay an invoice. To view this information, go to the "Accounting" Section of the system. Next, go into the "Payments" section and then go to the tab for "Subpayments". Click on the "Find" button and enter the customer. Then click "Find". This will display all the payment applications made to sales invoices and also display the average number of days it takes for a customer to pay. See Screenshot below.