Self-Employment Tax Calculator (2026)
Estimate Social Security and Medicare (self-employment) tax on your net business earnings for 2026, including the effect of other W-2 wages on the Social Security wage base.
Uses 2026 IRS figures · Checked 30 September 2026Self-employment tax
Move the sliders or type your own numbers. Results are estimates that assume a constant rate and are not guaranteed.
🧠 How this is calculated
Self-employment tax = 15.3% of 92.35% of net earnings (12.4% Social Security up to the 2026 wage base of $184,500, plus 2.9% Medicare). Half of it is deductible when figuring income tax.
Calculations run in your browser; nothing you enter is sent to us. Results are estimates that depend on the assumptions shown.
❓ FAQs
How is self-employment tax calculated?
It is 15.3% (12.4% Social Security up to the wage base plus 2.9% Medicare) of 92.35% of your net self-employment earnings.
Can I deduct any of it?
Yes, you can deduct half of the self-employment tax when figuring your income tax.
Is this financial advice?
No. The calculator shows what happens under the numbers you enter. Rates, limits and tax rules change; confirm with the provider or a licensed professional.
Results are illustrations, not offers or advice. Investments can lose value; bank deposits are FDIC-insured up to $250,000 per depositor, per insured bank, per ownership category.