If I work a full day then I'd be very disappointed if I didn't exceed £150 plus...but that doesn't mean I have all full days, depends on circumstances.
Individual days can on occasion far exceed that figure.
But you do need to have well priced work, and you also need to be experienced and quick at what you are doing.
It takes time to become quick, and of course it also takes time to build up enough work so that you are in a position to be able to earn reasonable money.
People outside of window cleaning may well think, "Wow, look at the money you can earn window cleaning!"
And they are right...you CAN earn very good money indeed, but it takes many, many months of hard slog before you get there, in fact, more often it takes a few years
Instant easy money it ain't!
According to the tax man, the average turnover for a window cleaner is around the £17-£19,000 per year, (and that isn't your wage remember) which of course means a great many earn far less than that.
Although a fair target to aim for is £100 and above for your daily turnover, taken over 12 months, even if you regularly top a ton, it's unlikely in the extreme you will be submitting 25k plus to the tax man...
Ian