How to pay yourself as a freelancer
Irregular income is stressful because personal bills arrive every month. The fix is to separate the two: all client payments go into a business account, and you pay yourself a fixed monthly amount from it.
Salary = (last year's income × (1 − tax rate) − business costs) ÷ 12 × safety margin. The safety margin (e.g. 85%) leaves room for a slower year.