I'm trying to work out a simple-to-understand formula for pricing up the longer jobs. One that I can undrstand and one that I can explain easily to the customer.
For window cleaning is's simple enough. It's £1 a window and a bit added or subtracted for difficult/ easy access.
Ideally, for longer jobs I'd like it to be based on time - charging by the hour.
I was thinking of something like £30 for the first hour and then £20 per hour.
So for a two-hour conservatory clean, for example. I could explain to the customer that it's a two-hour job so that's going to be ... £50. For a full guttering job, conservatory and windows where I might be spending four hours, that's £30 + 3 x £20 = £90.
What do others do?