Here is some excellent advice on how to set your own rates.
Create a solid difference between yourself and competitors to feel more confident about raising your rates. To separate yourself from colleagues, you can emphasize selectivity (you accept only a certain level or kind of client), specialization (you possess more experience and expert knowledge on one aspect of your industry), results (your superiority consists of a spectacular success rate that you can document) or concrete benefits of your work (results that your colleagues also produce but never explicitly point to). Pricing is a psychological phenomenon primarily, and the
road to higher profits begins with getting your own head straight about what’s reasonable to charge.