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Estimate SE tax, federal income tax, and quarterly estimated payments for freelancers and business owners (2026).
Total Self-Employment Tax
$11,304
SS: $9,161 + Medicare: $2,143
Federal Income Tax
$7,971
Total Tax Owed
$19,274
Quarterly Payment
$4,819
SE Tax Deduction
$5,652
Effective Total Rate
24.09%
Net After All Taxes
$60,726
Estimated Tax Due Dates
Each payment: $4,819
| Tax Component | Basis | Amount |
|---|---|---|
| Social Security (SE tax) | 12.4% on net earnings ≤ $176,100 | $9,161 |
| Medicare (SE tax) | 2.9% on all net earnings | $2,143 |
| Federal Income Tax | Progressive brackets (2026) | $7,971 |
| Additional Medicare Tax | 0.9% above $200,000 | $0 |
| Total Tax | Effective rate 24.09% | $19,274 |
Adjusted SE Income
$80,000
SE Tax Deduction (50%)
− $5,652
Adjusted Gross Income
$74,348
Federal Taxable Income
$59,348
Self-Employment Tax Calculator applies 15.3% SE tax to 92.35% of net SE income (SS portion capped at $176,100 wage base), deducts 50% of SE tax from AGI, applies 2026 federal income brackets, adds 0.9% Additional Medicare Tax above $200K/$250K, and divides total by 4 for quarterly payments.
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Net earnings = adjusted SE income × 0.9235. SS portion = min(net earnings, max(0, $176,100 − W-2 income)) × 12.4%. Medicare = net earnings × 2.9%. SE deduction = total SE tax × 0.5. Taxable income = max(0, SE income + W-2 − SE deduction − $15,000 standard deduction). Additional Medicare Tax = max(0, total income − threshold) × 0.9%. Quarterly estimates = total annual tax ÷ 4.
Self-employment tax is 15.3% — 12.4% for Social Security (up to $176,100 in 2026) and 2.9% for Medicare (no cap). This applies to 92.35% of your net SE income. You also get to deduct 50% of SE tax from your federal income tax.
Yes, if you expect to owe $1,000+ in federal taxes for the year. Quarterly due dates in 2026: April 15, June 16, September 15, and January 15, 2027. Underpayment can result in a penalty.
Yes. Business expenses (equipment, software, home office, health insurance, retirement contributions) reduce your net SE income, which lowers both SE tax and income tax. The self-employed health insurance deduction and Solo 401(k) contributions can reduce taxable income significantly.
An extra 0.9% Medicare surtax applies to combined wages and SE income above $200,000 (single) or $250,000 (married filing jointly). This is separate from the standard 2.9% Medicare tax and is not matched by an employer.
See exactly how much of your income falls into each federal tax bracket — with marginal vs effective rate breakdown.
Calculate your 2026 federal income tax with bracket-by-bracket breakdown.
Estimate your take-home pay after federal, FICA, state taxes, 401(k), and health premiums.