I have a couple clients who are constantly giving me last minute work. They are both fine with me charging them extra for this work, but I don't know how much to ask. One said "double it" So that's fine with me, but is that normal? Right now I'm at $50/hr, but I am thinking of raising it also. Here's my idea: $60/hr with greater than 5 business days notice $80/hr if less than 5 business days notice $100/hr with less than 48 hrs notice I also do a lot of project-based estimates, and would most likely do a % based system for those along the same rates.