We bill monthly and also have yearly contracts with our residentals. Our contracts state that if payment is not recieved by the tenth of each month a 5% late fee will be charged for any outstanding balance. Every estimate along with every invoice is highlighted and clearly states the late fees on them. So far no late fees have been recorded this year. Since they signed an estimate or contract hard for people to say they didn't see the late fee clause on them. Unfortunately,
some people are over paying on the yearly contracts. Extra money now but less in the winter months.