Hey Product Hunt 👋 I built QuarterlyVoucher because every free self-employment tax calculator I found had the same gap: they'd estimate your federal tax and just... stop. No state tax, no QBI deduction, no real quarterly payment breakdown — which are exactly the numbers freelancers actually need to avoid a surprise bill (or an underpayment penalty) in April. So I built the calculator I wished existed: self-employment tax, federal tax, and state tax for all 50 states, your effective rate, and all four quarterly payments with due dates — plus a safe-harbor comparison so you know you're not underpaying. There's also an S-corp vs. LLC savings calculator, a solo 401(k)/SEP-IRA calculator, and deduction calculators for home office and mileage. It's free, no sign-up required, and every calculation is checked against real IRS worked examples with an automated test suite — I wanted the numbers to actually be trustworthy, not just look like a nice UI. I'm a solo developer (not a CPA — that's disclosed on the site too), so if you spot something off or have a state/feature you want added, I'd genuinely love to hear it in the comments. Thanks for checking it out!

QuarterlyVoucher

Free 1099 self-employment tax calculator for all 50 states

Free 1099 self-employment tax calculator for all 50 states