Free calculators built on the current IRS figures, with the method and the sources shown on every page. No signup, and the numbers you type stay in your browser.
Estimate your 2026 self-employment tax in seconds: Social Security, Medicare and the extra 0.9% Medicare tax, from the current IRS figures. Free, no signup.
Estimate your 2026 federal tax and the minimum to pay each quarter to avoid an underpayment penalty, with the four IRS due dates. Free, no signup.
Figures last reviewed on . These tools give estimates for planning, not tax advice.