Free Self-Employment Tax Calculator Online
Use this free self-employment tax calculator to estimate your Social Security and Medicare taxes. Enter your net self-employment income to see a detailed breakdown of your SE tax, the deductible portion, and your quarterly estimated payment amounts.
Total Self-Employment Tax
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How This Self-Employment Tax Calculator Works
This self-employment tax calculator follows the IRS Schedule SE methodology. It starts with your net self-employment income (revenue minus business expenses) and applies the 92.35% adjustment factor. Then it calculates the 12.4% Social Security tax (up to the wage base limit) and the 2.9% Medicare tax (no ceiling) to determine your total SE tax.
For example, if your net self-employment income is $85,000, the taxable base is $78,498 (85,000 × 0.9235). Social Security tax is $9,734 and Medicare tax is $2,276, for a total self-employment tax of $12,010. You can then deduct half ($6,005) from your adjusted gross income on your 1040.
The self-employment tax calculator also flags the Additional Medicare Tax of 0.9% that applies to income above $200,000 for single filers. If you earn $250,000 in net self-employment income, that extra 0.9% adds approximately $415 to your SE tax bill.
SE Tax Quick Reference by Income
Approximate figures for 2026 tax year. Social Security caps at the wage base limit. Enter your exact income in the self-employment tax calculator for precise results.
3 Ways to Reduce Your Self-Employment Tax
Maximize Deductions
Every legitimate business expense reduces your net self-employment income, which directly lowers SE tax. Home office deduction, business mileage (67 cents/mile in 2026), health insurance premiums, retirement contributions, and software subscriptions all count. A $10,000 reduction in net income saves roughly $1,413 in self-employment tax.
S-Corp Election
Once your net profits exceed $50,000-$60,000, an S-Corp election may save significant self-employment tax. You pay yourself a reasonable salary (subject to payroll tax) and take remaining profits as distributions that skip SE tax. On $120,000 profit with a $70,000 salary, you save approximately $7,650 per year. Always consult a CPA first.
Retirement Accounts
Solo 401(k) and SEP-IRA contributions reduce your taxable income (not SE tax directly), but the income tax savings are substantial. A Solo 401(k) allows up to $23,500 in employee contributions plus 25% of net self-employment income as employer contributions — potentially $69,000+ total in 2026. That shelters a huge chunk from income tax.
Frequently Asked Questions
Disclaimer: This self-employment tax calculator is for educational purposes only. Tax rates and thresholds may change annually. This tool provides estimates and does not constitute tax advice. Your actual tax liability depends on your complete tax situation, filing status, and applicable deductions. Consult a qualified tax professional for personalized guidance.
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