Self-Employment Tax Calculator: Estimate Your SE Tax (2025-2026)

If you are self-employed, your tax bill is bigger than you expect. On top of income tax, you owe self-employment tax --- the 15.3% that covers Social Security and Medicare. Use the self employment tax calculator below to see what you actually owe.

Key Takeaways

• Self-employment tax is 15.3%: 12.4% Social Security + 2.9% Medicare.
• It applies to 92.35% of your net profit (not gross revenue).
• You can deduct half of your SE tax from your income.
• The Social Security portion caps out at the wage base ($176,100 in 2025, $183,000 in 2026).

Self-Employment Tax Calculator

Enter your net self-employment income (after business expenses) to get a quick estimate. The self employment tax calculator shows both your SE tax and your federal income tax so you can budget for quarterly payments.

How Self-Employment Tax Is Calculated

The IRS uses a four-step process on Schedule SE:

1. Start with net profit. This is your Schedule C bottom line (gross income minus business expenses).
2. Multiply by 92.35%. The IRS gives you a small break --- you only pay SE tax on 92.35% of net profit. This mirrors the fact that employers pay half of FICA for W-2 workers.
3. Apply the 15.3% rate. The combined rate covers Social Security (12.4%) and Medicare (2.9%).
4. Cap Social Security. The 12.4% Social Security portion stops once your combined earnings (W-2 wages + SE income) hit the wage base. Medicare has no cap --- and adds an extra 0.9% above $200,000 for single filers ($250,000 for married filing jointly, $125,000 for married filing separately).

Worked Example: Freelancer With $80,000 Net Profit

Step	Calculation	Amount
Net self-employment income	Schedule C profit	$80,000
Taxable SE earnings	$80,000 x 92.35%	$73,880
Social Security tax	$73,880 x 12.4%	$9,161
Medicare tax	$73,880 x 2.9%	$2,143
Total SE tax		$11,304
Deductible half	$11,304 / 2	$5,652

That $5,652 deduction reduces your adjusted gross income, which lowers your income tax. But the SE tax itself is still $11,304 --- roughly 14% of the original $80,000.

Strategies to Reduce Self-Employment Tax

• Maximize business deductions. Every $1,000 in deductions saves roughly $153 in SE tax plus whatever you save in income tax. Track mileage, home office expenses, software, and supplies.
• Elect S-Corp status. An S-Corp lets you pay yourself a reasonable salary and take the remaining profit as distributions that bypass SE tax entirely.
• Contribute to retirement accounts. Solo 401(k) and SEP IRA contributions reduce your net self-employment income, which lowers both your income tax and SE tax.
• Hire family members. Wages paid to your children under 18 in a sole proprietorship or spousal partnership are exempt from Social Security and Medicare taxes. This exemption does not apply if your business is an S-corp, C-corp, or partnership with non-parent partners.

SE Tax vs. Payroll Tax

	Self-Employed	W-2 Employee
Social Security (12.4%)	You pay all 12.4%	Split: you pay 6.2%, employer pays 6.2%
Medicare (2.9%)	You pay all 2.9%	Split: you pay 1.45%, employer pays 1.45%
Total rate	15.3%	7.65% (your share)
Deduction	Half of SE tax is deductible	Employer’s half is invisible to you
Wage base applies?	Yes, on combined W-2 + SE income	Yes, on W-2 wages

The economic burden is similar either way. Employees just don’t see the employer’s half on their paycheck. For a deeper comparison, see our payroll tax basics guide.

How sharper.tax Helps

sharper.tax analyzes your uploaded tax return to calculate your exact self-employment tax liability and identifies strategies --- like S-Corp election or retirement contributions --- that can reduce it. Upload your return and see how much you could save.

Sources

• IRS Schedule SE Instructions
• IRS Publication 334: Tax Guide for Small Business
• IRS Publication 535: Business Expenses
• IRS: Self-Employment Tax

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The information above is educational and not tax advice.