Self-Employment Tax Calculator
Enter your freelance, 1099, or business income to estimate 2026 self-employment tax. Includes the 92.35% adjustment, deductible half, quarterly payment amounts, and your effective SE tax rate.
Net Self-Employment Income
Net profit from Schedule C (gross income minus business expenses).
Filing Status
Affects the Additional Medicare Tax threshold.
W-2 wages or other earned income. Reduces the SS wage base available for SE income.
Deductible expenses not yet subtracted from gross income above.
Tax Savings & Deductions
The deductible half reduces your income tax, not SE tax itself.
SS Wage Base Tracker
Quarterly Estimated Payments
Each quarterly payment is the same: total SE tax / 4.
Projections
See Your Full Tax Picture
Tax Calculator US estimates your refund, compares tax years, and handles federal + state taxes.
What Is Self-Employment Tax and Who Pays It?
Self-employment tax covers Social Security and Medicare for people who work for themselves. Employees split these taxes 50/50 with their employer (7.65% each). If you're self-employed, you pay both sides, which comes to 15.3% (12.4% Social Security + 2.9% Medicare).
SE tax applies to sole proprietors, freelancers, independent contractors (1099), gig workers, and partners in partnerships. You report it on IRS Schedule SE (Form 1040). This is separate from federal and state income tax: you owe SE tax on top of income tax. If your net self-employment earnings hit $400 or more, you must file Schedule SE.
How Self-Employment Tax Is Calculated (Step by Step)
- Calculate net profit: Schedule C, Line 31 (gross income minus business expenses).
- Multiply by 92.35%. This IRS adjustment mirrors the employer-portion deduction that W-2 employers receive.
- Apply 12.4% Social Security on earnings up to the $184,500 wage base (2026).
- Apply 2.9% Medicare on all earnings. There's no cap.
- Apply 0.9% Additional Medicare Tax if combined earned income tops the threshold ($200K single, $250K MFJ, $125K MFS).
- Add all three components to get total SE tax.
- Deduct 50% of SE tax from AGI on Schedule 1, Line 15.
Example: $100,000 Net SE Income (Single Filer)
| Step | Calculation | Amount |
|---|---|---|
| Net SE Income | — | $100,000 |
| 92.35% Adjustment | $100,000 × 0.9235 | $92,350 |
| Social Security (12.4%) | $92,350 × 0.124 | $11,451 |
| Medicare (2.9%) | $92,350 × 0.029 | $2,678 |
| Additional Medicare (0.9%) | Below $200K threshold | $0 |
| Total SE Tax | — | $14,130 |
| Deductible Half | $14,130 × 0.5 | $7,065 |
Strategies to Reduce Your Self-Employment Tax
- Maximize business expense deductions. Home office, equipment, vehicle, insurance, and professional services all lower your net SE income.
- Consider S-Corp election when net SE income consistently tops ~$80K. The SE tax savings need to outweigh the added compliance costs ($3,500–$5,000/year).
- Contribute to retirement accounts. SEP-IRA (up to $69,000 in 2026) or Solo 401(k) contributions reduce taxable income.
- Deduct self-employed health insurance premiums. This above-the-line deduction lowers income tax (not SE tax).
- QBI deduction (Section 199A): up to 20% of qualified business income. Reduces income tax but not self-employment tax.
Self-Employment Tax by Income Level (2026)
Here's what SE tax looks like at common income levels (single filer, no W-2 income):
| Net SE Income | Adjusted (92.35%) | SS Tax | Medicare | Total SE Tax | Effective Rate |
|---|---|---|---|---|---|
| $25,000 | $23,088 | $2,863 | $670 | $3,533 | 14.13% |
| $50,000 | $46,175 | $5,726 | $1,339 | $7,065 | 14.13% |
| $75,000 | $69,263 | $8,589 | $2,009 | $10,597 | 14.13% |
| $100,000 | $92,350 | $11,451 | $2,678 | $14,130 | 14.13% |
| $150,000 | $138,525 | $17,177 | $4,017 | $21,194 | 14.13% |
| $200,000 | $184,700 | $22,878 | $5,356 | $28,234 | 14.12% |
| $250,000 | $230,875 | $22,878 | $6,695 | $29,851 | 11.94% |
| $500,000 | $461,750 | $22,878 | $13,391 | $38,625 | 7.72% |
Notice the effective rate drops at higher incomes. That's because the 12.4% Social Security portion caps out at the $184,500 wage base. Above $200,000 (single filers), the 0.9% Additional Medicare Tax kicks in, but it's not enough to offset the SS cap.
Social Security Wage Base History
| Year | Wage Base | Max SS Tax (SE, 12.4%) | Max SS Tax (Employee, 6.2%) |
|---|---|---|---|
| 2026 | $184,500 | $22,878 | $11,439 |
| 2025 | $176,100 | $21,836 | $10,918 |
| 2024 | $168,600 | $20,906 | $10,453 |
| 2023 | $160,200 | $19,865 | $9,932 |
| 2022 | $147,000 | $18,228 | $9,114 |
| 2021 | $142,800 | $17,707 | $8,854 |
| 2020 | $137,700 | $17,075 | $8,537 |
Sources: IRS Self-Employment Tax, IRS Topic 554, SSA Wage Base, IRS Topic 560 (Additional Medicare Tax). Estimates only. Not tax or legal advice. Consult a tax professional for accuracy.
Frequently Asked Questions
Common questions about self-employment tax
What is self-employment tax?
Self-employment tax covers Social Security and Medicare for people who work for themselves. Employees split these taxes with their employer (7.65% each side). If you're self-employed, you pay both halves for a combined rate of 15.3% (12.4% Social Security + 2.9% Medicare). You report it on Schedule SE, attached to your Form 1040.
How is self-employment tax calculated for 2026?
First, multiply your net self-employment earnings by 92.35% (the IRS adjustment factor). Then apply 12.4% for Social Security on the first $184,500 of adjusted earnings, and 2.9% for Medicare on all adjusted earnings. If your combined earned income exceeds $200,000 (single) or $250,000 (married filing jointly), you also owe an additional 0.9% Medicare tax on the excess.
What is the 92.35% factor and why does the IRS use it?
The 92.35% factor (100% minus 7.65%) mirrors the tax benefit W-2 employers get by deducting their half of FICA as a business expense. Since self-employed people pay both halves, the IRS shaves down the taxable base by the employer-equivalent portion so the math stays fair relative to employees.
Can I deduct self-employment tax?
Yes. You can deduct half (50%) of your self-employment tax as an above-the-line adjustment on Schedule 1, Line 15. This lowers your adjusted gross income (AGI), which means less federal income tax. The catch: this deduction does not reduce SE tax itself, only your income tax bill.
What is the Social Security wage base for 2026?
For 2026, the Social Security wage base is $184,500, up from $176,100 in 2025. The 12.4% Social Security portion of SE tax only applies to net earnings (after the 92.35% adjustment) up to this limit. Medicare has no cap and applies to everything. That puts the maximum Social Security portion of SE tax at $22,878 for 2026.
Do I need to make quarterly estimated tax payments?
If you expect to owe $1,000 or more in total tax (SE tax plus income tax) when you file, the IRS requires quarterly estimated payments using Form 1040-ES. The 2026 deadlines are April 15, June 15, September 15, and January 15 of 2027. Missing these deadlines can trigger an underpayment penalty.
How does W-2 income affect my self-employment tax?
If you have both W-2 wages and self-employment income, your W-2 employer already withholds Social Security tax on those wages. That eats into the wage base available for your SE income. Say you earn $120,000 from a W-2 job: only $64,500 of the $184,500 wage base is left for SE income. Medicare still applies to all SE income regardless of W-2 wages.
What is the minimum income to owe self-employment tax?
You owe SE tax (and must file Schedule SE) once your net self-employment earnings reach $400 or more in a tax year. That threshold applies to net earnings before the 92.35% adjustment. Below $400 in net SE income, you don't owe SE tax, though you may still owe income tax on the amount.
Need More Than a Quick Calculation?
Tax Calculator US estimates your refund, compares tax years side-by-side, and covers federal + state taxes in one place.