Updated June 17, 2026
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Open the calculatorSelf-employment tax is a 15.3% federal tax on net self-employment income, consisting of 12.4% for Social Security and 2.9% for Medicare. Unlike employees whose employers split this cost, self-employed workers pay the full amount themselves, though the IRS allows you to deduct half of it from your taxable income, which softens the blow.
What Is Self-Employment Tax?
When you work as an employee, your employer withholds half of your Social Security and Medicare taxes and pays the other half out of pocket. When you are self-employed, you are both the employer and the employee, so you cover the entire 15.3%. According to the IRS self-employment tax guidance, this tax applies to net earnings of $400 or more in a tax year.
The tax is calculated on Schedule SE, which is filed with your Form 1040. The SE tax is separate from your regular federal income tax. You will owe both.
How the 15.3% Rate Breaks Down
| Component | Rate | Notes |
|---|---|---|
| Social Security | 12.4% | Applies up to the annual wage base (check IRS for current year) |
| Medicare | 2.9% | No income cap |
| Additional Medicare | 0.9% | Applies above $200,000 single / $250,000 married filing jointly |
| Total standard rate | 15.3% | On net self-employment income |
The Social Security component has an annual wage base limit that the IRS adjusts each year. Once your combined wages and self-employment income exceed that threshold, you stop owing the 12.4% Social Security portion for the year, though the 2.9% Medicare portion continues with no cap. High earners above $200,000 (single) also face an extra 0.9% Medicare surtax.
The Deduction That Offsets Half the Tax
One of the most valuable breaks for the self-employed is the above-the-line deduction for half of your SE tax. Because an employer pays half of payroll taxes for regular employees, the IRS allows self-employed filers to deduct the "employer-equivalent" half from adjusted gross income. This deduction does not reduce your SE tax itself, but it lowers the income on which your federal income tax is calculated. You claim it directly on Schedule 1 of Form 1040.
What Counts as Self-Employment Income?
- Freelance fees and project income reported on 1099-NEC forms
- Business profit from sole proprietorships (Schedule C)
- Gig economy earnings (rideshare, delivery, online platforms)
- Net rental income if you provide substantial services
- Certain partnership income
It is the net figure that matters. You subtract legitimate business expenses from gross revenue to arrive at net self-employment income, and SE tax is calculated on that net amount.
Legal Ways to Lower Self-Employment Tax
1. Maximize Business Deductions
Every deductible expense reduces your net self-employment income, which directly reduces your SE tax base. Common deductions include home office expenses, business mileage, professional subscriptions, software, and health insurance premiums. Keep receipts and document the business purpose.
2. Contribute to a Retirement Account
Self-employed individuals can open a SEP-IRA, Solo 401(k), or SIMPLE IRA. Contributions to these accounts reduce your adjusted gross income and therefore your income tax, though contributions come from net earnings after SE tax is already calculated. A Solo 401(k) lets you contribute as both "employee" and "employer," which can dramatically reduce taxable income.
3. Deduct Self-Employed Health Insurance Premiums
If you pay for your own health, dental, or vision insurance and are not eligible for employer-sponsored coverage through a spouse, you may deduct 100% of those premiums from income tax. This is an above-the-line deduction that directly reduces your adjusted gross income.
4. Elect S-Corp Status (for Higher Earners)
Once self-employment income consistently exceeds roughly $40,000 to $50,000 per year, many tax professionals recommend electing S-corp status. As an S-corp owner-employee, you pay yourself a "reasonable salary" subject to payroll taxes, and take additional profit as distributions that are not subject to SE tax. This strategy requires careful setup and ongoing compliance costs, so consult a qualified tax professional before pursuing it.
5. Track Every Deductible Expense Meticulously
Many self-employed workers leave money on the table simply by not tracking expenses. Use accounting software or a dedicated business bank account and credit card to capture every deductible cost throughout the year rather than scrambling at tax time.
Running the Numbers
Want to see exactly how SE tax affects your specific situation? Use the free 1099 tax calculator on this site to estimate both your self-employment tax and your federal income tax side by side. Enter your net income and filing status to get an instant estimate.
The Social Security Administration tracks your earned income history, and your self-employment tax payments are what build your Social Security credits as a self-employed person. Paying SE tax is not just a cost; it is also building toward future retirement and disability benefits.
When to Call a Tax Professional
Self-employed individuals must also send the IRS quarterly estimated payments covering both SE tax and income tax. The IRS estimated taxes page includes worksheets and due dates to help you calculate each payment and avoid underpayment penalties.
The strategies above are general educational information, not personalized tax advice. Tax situations vary significantly based on your income level, filing status, state of residence, business structure, and other factors. A licensed CPA or enrolled agent who works with self-employed clients can identify deductions specific to your situation and help you avoid costly mistakes. Always consult a qualified tax professional before making major decisions about business structure or retirement account contributions.
Self-employment tax is one of the biggest financial adjustments for new freelancers and contractors. Understanding the 15.3% rate, the deductions available to you, and the strategies that legally reduce your bill puts you in a much stronger position at tax time.
Estimate your 1099 taxes.
See self-employment tax and what to set aside in seconds.
Open the calculator