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The figures this uses
| Figure | 2026 | Source |
|---|---|---|
| Self-employment tax rate | 15.3% — 12.4% Social Security plus 2.9% Medicare, applied to 92.35% of net profit | irs.gov |
| Filing requirement | net earnings from self-employment of $400 or more. Net earnings are 92.35% of net profit, so the crossover is about $433 of profit | irs.gov |
| Social Security wage base | $184,500 for 2026. Only Social Security has a wage base; Medicare has none | irs.gov |
| Additional Medicare Tax | 0.9% above $250,000 married filing jointly · $125,000 married filing separately · $200,000 single, head of household and qualifying surviving spouse. No employer match | irs.gov |
This calculator is for educational purposes only and does not constitute tax, legal, or financial advice. It covers United States federal tax and simplifies in the ways noted beside each result. Consult a qualified tax professional about your situation.