How this day rate calculator works
The math mirrors the hourly rate calculator, but per day:
Day rate = (income goal + expenses) ÷ (1 − tax rate) ÷ billable days
Why 230 billable days is the sensible default
A year has 261 weekdays. Subtract 20 vacation days, 8 holidays and a few sick days, and you are at about 230 — before any time spent on sales, admin or skill-building. If you bill by the day, every non-billable day comes directly out of your income goal, so the buffer matters more than it does for hourly work.
Tax mode
The Automatic mode solves for the day rate using 2026 U.S. federal tax — self-employment tax, income brackets, standard deduction and the 20% QBI deduction — assuming an 8-hour day. If you already know your combined tax rate, switch to Manual and enter it directly. Either way, the day rate shown is what you must charge to hit your goal, not a guess.