Free Self-Employment Tax Calculator (2026)
Last updated: 2026-03-28
Calculate your self-employment tax, federal income tax, and quarterly estimated payments in seconds. This calculator uses 2026 IRS rates, the $184,500 Social Security wage base, Additional Medicare surtax thresholds, standard deductions, and a simplified QBI deduction estimate — so you know exactly what to set aside each quarter.
Self-Employment Tax Calculator (2026)
Calculate your SE tax, federal income tax, and quarterly estimated payments using 2026 rates and brackets.
Revenue minus business expenses (Schedule C line 31)
Optional — affects SS cap and Additional Medicare threshold
Flat-rate estimate — actual state tax may differ
This calculator provides estimates based on 2026 federal tax rates and simplified state tax approximations. Actual tax liability may differ due to itemized deductions, credits, AMT, NIIT, phase-outs, or other factors. QBI deduction shown is a simplified estimate and does not account for income thresholds, specified service trades, or W-2 wage/property limitations. State tax uses a flat rate approximation — your actual state tax may be higher or lower. This is not tax advice. Consult a qualified CPA or tax professional for your specific situation.
How to Use This Calculator
- Select your filing status— this affects your tax brackets, standard deduction, and Additional Medicare threshold.
- Enter your net self-employment income— this is your Schedule C profit (revenue minus business expenses), not your gross revenue.
- Add any other income(optional) — W-2 wages, interest, dividends, or other earned income. This affects the Social Security wage cap and Additional Medicare threshold.
- Choose your state— the calculator adds a simplified state income tax estimate. Choose "No state income tax" if your state does not tax earned income.
- Click "Calculate My Tax" to see your full breakdown: SE tax, deductions, income tax, effective rate, and quarterly payment amounts with due dates.
How Self-Employment Tax Works
Self-employment tax is the Social Security and Medicare tax that self-employed individuals pay. When you work as an employee, your employer withholds 7.65% of your wages for FICA taxes and pays a matching 7.65%. As a self-employed person, you pay both halves — a total of 15.3%. This is reported on Schedule SE and paid through quarterly estimated tax payments alongside your income tax.
The 15.3% rate consists of two components: 12.4% for Social Security and 2.9% for Medicare. The Social Security portion only applies to the first $184,500 of combined earned income in 2026 (this is called the "wage base" and adjusts annually for inflation). Medicare has no cap — it applies to all self-employment earnings.
High earners face an additional 0.9% Medicare surtax on self-employment income exceeding $200,000 (single filers) or $250,000 (married filing jointly). This Additional Medicare Tax was introduced by the Affordable Care Act in 2013 and has no employer match — it is paid entirely by the worker.
One important relief: the IRS lets you calculate SE tax on only 92.35% of your net earnings (not the full 100%). This mirrors the fact that employees do not pay FICA on the employer's share of payroll taxes. Additionally, you can deduct the employer-equivalent half of your SE tax from your adjusted gross income, which reduces your income tax (but not your SE tax itself).
How We Calculate Your Tax
- SE tax base:Net self-employment income × 92.35%. This adjustment accounts for the employer-equivalent portion of FICA.
- Social Security tax: 12.4% on the lesser of your SE tax base or the remaining Social Security wage cap ($184,500 minus any W-2 wages).
- Medicare tax: 2.9% on the entire SE tax base, with no income cap.
- Additional Medicare tax: 0.9% on combined SE earnings plus other income that exceed the filing-status threshold ($200K single, $250K MFJ, $125K MFS).
- Total SE tax: Social Security + Medicare + Additional Medicare.
- Employer-equivalent deduction: 50% of total SE tax, subtracted from adjusted gross income.
- QBI deduction: Up to 20% of net SE income (simplified estimate under Section 199A), subtracted from taxable income.
- Standard deduction: $15,700 (single/MFS), $31,400 (MFJ), or $23,500 (HoH) for 2026.
- Federal income tax: Calculated using 2026 graduated tax brackets on your taxable income after all deductions.
- State tax: Flat-rate approximation based on your selected state (actual brackets may vary).
- Quarterly payments: Total annual tax divided by 4, with 2026 IRS due dates.
Strategies to Reduce Self-Employment Tax
S-Corp Election
The most impactful strategy. By electing S-Corp status (Form 2553), you pay yourself a reasonable salary (subject to payroll tax) and take remaining profits as distributions, which are not subject to the 15.3% SE tax. This can save thousands annually. Generally most beneficial when net profits exceed $50,000-$60,000. See our S-Corp guide for details.
SEP IRA or Solo 401(k)
Contribute up to $69,000 (2026) to a SEP IRA or Solo 401(k). If you are 50 or older, the Solo 401(k) allows catch-up contributions up to $76,500. These contributions reduce your taxable income (lowering income tax) but do not reduce SE tax directly. The tax-deferred growth provides substantial long-term savings.
Self-Employed Health Insurance Deduction
Deduct 100% of health, dental, and qualified long-term care insurance premiums for yourself, your spouse, and dependents. This is an above-the-line deduction that reduces your income tax (though not your SE tax). Available only if you are not eligible for an employer-sponsored plan through a spouse or other job.
Maximize Business Deductions
Every dollar of legitimate business expense reduces both your income tax and SE tax. Commonly missed deductions include home office (simplified or actual), business mileage ($0.70/mile in 2026), continuing education, professional subscriptions, business insurance, and Section 179 expensing for equipment purchases.
Frequently Asked Questions
What is self-employment tax and who pays it?
Self-employment tax is a federal tax that funds Social Security and Medicare. If you earn $400 or more per year in net self-employment income, you must pay it. This includes sole proprietors, freelancers, independent contractors, single-member LLC owners, and general partners. The tax is reported on Schedule SE (Form 1040) and paid through quarterly estimated tax payments.
What is the self-employment tax rate for 2026?
The self-employment tax rate is 15.3% of 92.35% of your net self-employment income. The 15.3% breaks down into 12.4% for Social Security (on the first $184,500 of combined wages and SE income in 2026) and 2.9% for Medicare (no cap). If your combined income exceeds $200,000 (single) or $250,000 (married filing jointly), an additional 0.9% Medicare surtax applies.
Why does the calculator multiply my income by 92.35%?
The 92.35% factor (100% minus 7.65%) approximates the employer-equivalent portion of FICA taxes. When you are employed, your employer pays 7.65% of your wages in FICA taxes, and that employer portion is not included in your taxable wages. The IRS gives self-employed individuals the same benefit by letting you calculate SE tax on only 92.35% of net earnings rather than the full amount.
What is the Social Security wage base for 2026?
The Social Security wage base for 2026 is $184,500. You only pay the 12.4% Social Security portion of SE tax on the first $184,500 of combined wages and self-employment income. If you also have W-2 wages, those count first. For example, if you earn $120,000 in W-2 wages, only $64,500 of your SE income is subject to the Social Security portion.
What is the Additional Medicare Tax and when does it apply?
The Additional Medicare Tax is a 0.9% surtax on self-employment income above certain thresholds: $200,000 for single and head of household filers, $250,000 for married filing jointly, and $125,000 for married filing separately. This is calculated on your combined self-employment earnings plus any other earned income (W-2 wages). Only the amount above the threshold is subject to the additional 0.9%.
What is the QBI deduction and how does it reduce my taxes?
The Qualified Business Income (QBI) deduction under Section 199A allows eligible self-employed individuals to deduct up to 20% of their qualified business income from their taxable income. This reduces your federal income tax but does NOT reduce your self-employment tax. The deduction has income-based phase-outs and limitations for specified service trades (law, medicine, consulting, etc.) at higher income levels. This calculator provides a simplified estimate of the QBI deduction.
How do I pay quarterly estimated taxes?
Self-employed individuals must make quarterly estimated tax payments using Form 1040-ES. The 2026 due dates are April 15, June 16, September 15 (2026), and January 15 (2027). Each payment covers approximately one quarter of your total annual tax liability (SE tax + income tax). If you underpay by more than $1,000 at year-end, you may face an underpayment penalty. You can pay online at IRS.gov/payments, through the IRS2Go app, or by mail.
Can I reduce my self-employment tax?
Yes. The most impactful strategy is electing S-Corp taxation, which lets you split income between a reasonable salary (subject to payroll tax) and distributions (not subject to SE tax). Other strategies include maximizing retirement contributions (SEP IRA up to $69,000 or Solo 401(k) up to $69,000/$76,500 if over 50), claiming the self-employed health insurance deduction, and ensuring you deduct all legitimate business expenses to reduce your net SE income.
How does this calculator handle state taxes?
This calculator includes a simplified state income tax estimate using a flat rate approximation for each state. Actual state taxes vary based on brackets, deductions, and credits specific to your state. Nine states (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming) have no state income tax on earned income. For an accurate state tax calculation, consult your state's tax authority or a CPA.
Is the employer-equivalent deduction the same as the SE tax deduction?
Yes. The IRS allows self-employed individuals to deduct the employer-equivalent portion of their SE tax (50% of total SE tax) as an above-the-line deduction on Form 1040. This reduces your adjusted gross income and therefore your income tax, but it does NOT reduce your self-employment tax itself. This deduction is automatic and does not require itemizing.
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Last updated: 2026-03-28. This calculator provides estimates only and is not a substitute for professional tax advice. Actual tax liability may differ due to credits, AMT, NIIT, itemized deductions, or state-specific rules. Always consult a qualified CPA or tax professional. Sources: IRS Revenue Procedure 2025-11 (2026 inflation adjustments), IRS Publication 334 (Tax Guide for Small Business), IRS Schedule SE instructions.