I plonked this at the bottom of a reply to another posting, thought it would make an interesting posting of it's own!
A couple of points to bare in mind when working out what you should be charging an hour:
1/ There are of course 365 days in the year.
2/ you don't work all of them!
Take of holidays and bank holidays (you may not take them, but should assume when working out your rate that you do)
3/ Allow for days off through sickness or other reasons, there will always be a few.
4/ Take off the weekends too (even if you do intend to work them)
5/ Scratch off at least 10 working days for bad weather, heavy rain isn't the only time the weather will stop you working, high winds, snow and sub zero temps will slow you right down even if you do persevere and battle the elements.
6/ Customers will talk to you, people will ring you, time will be lost every day and you can't work much past 4pm in the winter months.
Out of an 8 hour day, you will be lucky to be actually working much more than 6 of them.
Do your sums re-hours, you will be surprised how much you need to charge to actually earn your target income.
Oh, and of course you also need to take into account your actual business running costs, might be quite small for us window cleaners compared to other trades, but they do add up!.............
Ian