Since revenue from my work can sometimes be inconsistent, I’ve always figured my base salary as the average I’ve made in profit (not revenue) for the last twelve months, minus 25 to 30 percent (to set aside for taxes). Before raising my salary if my profits increase, I also take into consideration the minimum amount I need each month to live on and be comfortable. With my twelve-month average profit in mind, and not going too far past my minimum living expenses, I can set myself a fairly steady salary.