I charge £25 per hour to agencies or £200 per day (whichever comes first), but raise that to £40 per hour for private businesses because I then have to deal with all the extra stuff that clients throw at me, which inevitably eats into my day more.
It's still a lot cheaper than someone would pay at an agency, for in my opinion, the same level of service.
After all, up until 2 months ago, if someone came to me as part of my agency, I would charge them at least £60 an hour as I had overheads that needed to be paid for. This way, I'm still doing the same job, but a helluva lot cheaper.
