Estimate your 2025 self-employment tax, federal income tax, and quarterly estimated payments from your net business income — free and instant, right in your browser.
Self-employment tax is 15.3% on 92.35% of your net earnings — 12.4% Social Security (up to the annual wage-base cap) plus 2.9% Medicare — and half of it is deductible against your income tax. The calculator applies the published 2025 numbers, including the standard deduction and current brackets.
When you're done estimating, Felix can compute the real thing from your bank activity — deterministically, year-round, and it never invents a number (§0.1).