So far this year, I have had multiple customers who are late every month paying. I bill out at the end of every month and usually give them two weeks to pay. One customers went 90 days, and the others have been roughly one month behind. My question is at what point do you cut them off? Do you guy charge a late fee considering it messes up cash flow? If so how much? This month I stopped services to the 90 day customer as well as sent out reminders to the others and have only received two payments.