PJ and Hydrophil, have a point.
You need to see your tax return to see how much you have really earned per hour, until you see all your expenses against your Gross, you can only guess.
Dont dismiss all those hours canvassing, reasearching on here, invoicing, standing outside river island waiting for them to open lol, when you work out your "TRUE" hourly rate
It could be a real eye opener, I had a real shock this quarter, according to my accountant, I just about broke even.