I need to refine my late fee procedures. Did a search here and there were varying opinions on using a flat fee versus a % fee. Currently we use a $15 "re-billing fee"if the balance is not paid by the due date. (we issue invoices at the beginning of the month and they are due by the 5 th of the following month ...all maintenance customers are on contract). Most pay by the end of the month in which the service was performed. A few commercial accounts are ALWAYS 30 days beyond 5th due date. I dont pretend that any company is going to change their accounting process but I also dont need to be financing them either Any advice/opinions are welcome...particularly if you tightened the screws in 2003 . If you did, how were the results?