How long after sending invoices do you make them due? How long before you terminate or add late fees. I'm sending invoice out on the 15th and make them due by the 1st. this is all for work done the previous month. I have pretty good success with collections, but with business you always have late or no pays. most of my late pays are always late and i have come to expect it. the problem is with no pays. since i float them for an additional 2 weeks they will get cuts before payment is due. Just wondering what everyone's policy is.