You put them up 20% that's tricky but there's gonna come a time you'll have to put it up again for a rise for yourself and the business,if you haven't had grief with the VAT part this will get em cancelling imo. Some will stay and understand I'm sure but if your area is littered with non VAT window cleaners I can see problems,commercial couldn't care less if your charging VAT they all pay it so understand it's the domestics your bound to have problems with,although we are in the 21st century a lot of people still can't get there head around a window cleaner and 80 grand a year and that's a fact when you listen to people that haven't a clue. It's good they don't have a clue what you can earn cleaning windows charging VAT and telling them is a good reason for them to stop the attitude of he's a nice bloke he's been cleaning our windows for ages to Jesus he earns 2-3 times what I earn,i don't think he needs my 40-50 every 6-8 weeks do you love lol.