I use a stopwatch when I work, and I charge by the quarter-hour. My rate is $50 per hour. Clients often ask for estimates before a job and I’m happy to give estimates, but in the end I charge for the actual hours worked: this is the most fair to both the client and to me.
I do my billing on the last day of the month, because
I have some clients that send me jobs throughout the month. Systems… they make life so much better!
If you have any questions, please contact me.