Self-Employment Tax: Complete 2026 Guide
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If you're a freelancer, independent contractor, gig worker, or small business owner, you may owe self-employment (SE) tax on your net earnings. This guide covers the 2026 rates, how the math works, deductions that may reduce regular income tax, and the separate rules used to determine estimated payments.
What Is Self-Employment Tax?
Self-employment tax covers Social Security and Medicare - the same FICA taxes that W-2 employees split with their employer. When you're self-employed, you pay both halves:
| Component | Employee Share | Employer Share | Self-Employed Total |
|---|---|---|---|
| Social Security | 6.2% | 6.2% | 12.4% |
| Medicare | 1.45% | 1.45% | 2.9% |
| Total FICA / SE Tax | 7.65% | 7.65% | 15.3% |
The 12.4% Social Security portion applies until your own covered W-2 wages plus SE-taxable earnings reach the 2026 wage base of $184,500. A spouse's wages use the spouse's separate wage base and do not reduce yours. The 2.9% Medicare portion has no wage cap. You may also owe the 0.9% Additional Medicare Tax when household Medicare wages and self-employment earnings exceed the filing-status threshold—$200,000 for single filers or $250,000 for married couples filing jointly.
How to Calculate Self-Employment Tax
The calculation has a few steps. Here's a worked example for a freelancer earning $80,000 net:
Example: $80,000 Net Self-Employment Income
Step 1: Multiply net earnings by 92.35%: $80,000 × 0.9235 = $73,880
(Schedule SE generally applies this factor before calculating the regular SE tax.)
Step 2: Calculate Social Security: $73,880 × 12.4% = $9,161
Step 3: Calculate Medicare: $73,880 × 2.9% = $2,143
Step 4: Regular SE tax: $9,161 + $2,143 = $11,304
Effective regular SE-tax rate: $11,304 ÷ $80,000 = 14.13%
Use our Self-Employment Tax Calculator to run these numbers instantly for your income level.
Modeled Federal Tax at Common Income Levels
| Net Earnings | SE + Addl. Medicare | SE-Tax Effective Rate | Total Federal Tax | Total ÷ 4 |
|---|---|---|---|---|
| $30,000 | $4,239 | 14.13% | $5,417 | $1,354 |
| $50,000 | $7,065 | 14.13% | $10,461 | $2,615 |
| $75,000 | $10,597 | 14.13% | $17,101 | $4,275 |
| $100,000 | $14,130 | 14.13% | $25,745 | $6,436 |
| $150,000 | $21,194 | 14.13% | $43,385 | $10,846 |
| $200,000 | $28,234 | 14.12% | $61,580 | $15,395 |
Assumptions: single filer, no W-2 wages, no other deductions, credits, withholding, or QBI deduction. “Total federal tax” combines regular federal income tax, regular SE tax, and any Additional Medicare Tax attributable to self-employment income. Dividing that annual estimate by four is a budgeting benchmark—not the payment required under IRS estimated-tax rules.
Deductions and Expenses: What They Actually Lower
1. The 50% SE Tax Deduction
You can generally deduct the employer-equivalent portion of regular SE tax when calculating adjusted gross income. Additional Medicare Tax is excluded from this deduction. The adjustment doesn't reduce SE tax itself; it can reduce regular income tax. In the $80,000 example above, the model calculates $11,304 of regular SE tax and an above-the-line deduction of $5,652.
2. Business Expense Deductions
Every legitimate business expense reduces your net earnings, which directly reduces both your SE tax and income tax. Common deductions include home office, equipment, software, mileage, and professional development. The IRS business mileage rate is 72.5 cents per mile for January through June 2026 and 76 cents per mile for July through December 2026.
3. SEP IRA or Solo 401(k)
Eligible retirement-plan contributions can reduce taxable income, though they generally do not reduce the SE-tax base. SEP and one-participant 401(k) contribution calculations use special self-employed compensation rules; the 2026 defined-contribution limit is $72,000, while the employee-deferral limit is $24,500. See our 2026 contribution limits guide and the IRS plan rules before treating the maximum as available in a specific case.
4. Health Insurance Deduction
Eligible self-employed individuals may be able to deduct up to 100% of qualifying health-insurance premiums for themselves and their family. The deduction is limited by earned income from the business and by eligibility for subsidized employer coverage, and it reduces income tax rather than SE tax.
Quarterly Estimated Tax Payments
Federal income tax is pay-as-you-go. You may need estimated payments if you expect to owe at least $1,000 after withholding and refundable credits and those prepayments will not satisfy one of the IRS safe-harbor tests. Estimated tax covers regular income tax, SE tax, and certain other taxes—not SE tax alone.
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 - March 31 | April 15, 2026 |
| Q2 | April 1 - May 31 | June 15, 2026 |
| Q3 | June 1 - August 31 | September 15, 2026 |
| Q4 | September 1 - December 31 | January 15, 2027 |
Avoid Penalties
For most calendar-year taxpayers, the required annual payment is generally the smaller of 90% of expected 2026 tax or 100% of 2025 tax. The prior-year percentage generally rises to 110% when 2025 AGI exceeded $150,000 ($75,000 if married filing separately). Withholding, refundable credits, uneven income, filing status, and special rules can change the amount or timing, so use the 2026 Form 1040-ES worksheet or IRS Publication 505 rather than treating the table above as a payment instruction.
Self-Employment Tax vs. Income Tax
Self-employed people owe two separate taxes, and it's important to understand both:
| Self-Employment Tax | Federal Income Tax | |
|---|---|---|
| Rate | 12.4% Social Security up to the wage base + 2.9% Medicare; possible 0.9% additional tax | 10%-37% (progressive) |
| Applies to | 92.35% of net SE earnings | AGI minus deductions |
| Standard deduction | No | Yes ($16,100 for a 2026 single filer) |
| SS wage cap | $184,500 in 2026 | N/A |
Under the assumptions used in the table, a single filer with $100,000 of net self-employment income has about $14,130 of regular SE and Additional Medicare tax and $11,616 of regular federal income tax, or $25,745 combined before state tax. Credits, the QBI deduction, other income or deductions, and prior W-2 wages can materially change that estimate.
Frequently Asked Questions
Who has to pay self-employment tax?
People generally must file Schedule SE when adjusted net earnings from self-employment reach $400. Under the regular method, Schedule SE first applies the 92.35% factor, so that threshold is reached at about $434 of Schedule C net profit. Freelancers, independent contractors, sole proprietors, partners, and gig workers can be affected, while church-employee and optional-method rules create exceptions.
Can I reduce self-employment tax by forming an S-Corp?
Potentially, but not automatically. An S corporation generally pays an owner-employee reasonable compensation subject to payroll tax; qualifying distributions are generally not subject to SE tax. Entity eligibility, reasonable-compensation rules, payroll administration, state taxes, and other costs affect whether the structure produces a net benefit. This is a planning question for a qualified tax professional, not a calculation this guide resolves.
Do I pay self-employment tax on rental income?
Rental real-estate income is generally excluded from net earnings from self-employment, but dealer activity, substantial services, and other facts can change the treatment. Check the Schedule SE instructions for the applicable exception.
What's the difference between 1099 and W-2 for taxes?
W-2 employees split the regular Social Security and Medicare rates with their employer. A self-employed person generally accounts for both shares through SE tax, while also deducting ordinary business expenses and the employer-equivalent portion of SE tax under the applicable rules. Gross contract receipts and W-2 wages are not directly comparable, so the difference depends on expenses, benefits, deductions, other wages, and filing status.
Sources and Model Boundaries
The examples on this page are generated from the same PennyCalc module as the interactive calculator. They model regular federal income tax, regular SE tax, and any Additional Medicare Tax attributable to self-employment income for a calendar-year individual; they do not model every credit, the QBI deduction, entity-level tax, state tax, or a taxpayer's required estimated-payment safe harbor.
- IRS 2026 tax inflation adjustments for the standard deduction and federal brackets.
- IRS Topic 751 for 2026 Social Security and Medicare rates and the wage base.
- IRS Publication 505 (2026) for estimated-tax thresholds, due dates, and safe-harbor rules.
- IRS self-employment tax guidance for who generally owes SE tax and how it relates to Social Security and Medicare.