Not a mixer, but for design services I was given an article. Copying and pasting the part to come up with your hourly rate. Old article so you would need to account for updated tax numbers and inflation.
"Step 1: Determine your salary. That’s right, you get to decide what is the salary you need your business to pay you, before taxes. Let’s work with $40,000. This is the “100% figure that corresponds to Peleg Top’s Money Management System. Add 30% on top of that to cover your income tax. 30% of $40,000 is $12,000. Therefore, you need to pull $52,000 per year from your business.
Step 2: Figure your labor hourly rate. That is how much money you make for every hour that you work, or more accurately, for every hour that you bill a client. To do that, determine how many hours you’ll be working for clients in a year. 1142 hours is an industry standard used for figuring hourly rates, and it’s based on a 40-hour work week. (If you’re working part time, figure it based on the number of hours you actually work per week.) Based a standard 40-hour work week, there are 2080 working hours in a year (52 weeks x 40 hours/week). In reality, however, people get sick and take days off. The standard number used for days off is 176 hours (that’s 22 8-hour days). So, 2080–76 = 1904 working hours in the year. That doesn’t mean you’re billing all 1904 hours. If your business is healthy and thriving, you’ll spend approximately 40% of your time on administrative duties, managing, invoicing, filing, marketing, travel, etc. So that means 60% of your time is billable. 60% of 1904 is 1142. To calculate your hourly rate, take the total salary you need ($52,000) and divide it by 1142 hours. That brings your labor hourly rate to $45.53. If you work and bill 1142 hours at this rate, you’ll make the after-tax income of $40,000 you want."
