How to Use the Self Employment Tax Calculator
The Self Employment (SE) Tax is the independent contractor equivalent of the FICA taxes that W-2 employees split with their employer. As a self-employed individual, you pay both the employee portion (7.65%) and the employer portion (7.65%), totaling 15.3%. This calculator estimates your SE tax accurately and helps you plan for quarterly estimated payments.
Enter your annual net self-employment income — this is your total freelance or business income after cost of goods sold but before deducting business expenses. Then enter your total business deductions for the year, including mileage, home office, supplies, marketing, and software subscriptions. The calculator applies the 92.35% SE tax base rule and the Social Security wage cap automatically.
Self Employment Tax Formula
The SE tax is calculated on 92.35% of your net earnings from self-employment (not 100%). This adjustment accounts for the fact that you can deduct half of the SE tax when calculating your adjusted gross income. The formula is:
SE Tax Base = Net Income × 0.9235
Social Security portion = min(SE Tax Base, $176,100) × 12.4%
Medicare portion = SE Tax Base × 2.9%
Total SE Tax = Social Security + Medicare
Example: With $65,000 net income and $12,000 in deductions: Taxable = $53,000. SE Base = $48,945.50. SS = $6,069.24. Medicare = $1,419.42. Total SE Tax = $7,488.66. Quarterly = $1,872.17.
| Component | Rate | Wage Cap | On $50k Income | On $200k Income |
|---|---|---|---|---|
| Social Security | 12.4% | $176,100 | $5,722 | $20,129 |
| Medicare | 2.9% | No cap | $1,339 | $5,355 |
| Total SE Tax | 15.3% | — | $7,061 | $25,484 |
* Calculated on 92.35% of net SE income. $176,100 Social Security wage cap for 2026.
Frequently Asked Questions (FAQs)
Who needs to pay self-employment tax?
If you had net earnings of $400 or more from self-employment during the year, you must file Schedule SE and pay self-employment tax. This applies to freelancers, independent contractors, gig workers (Uber, DoorDash), sole proprietors, and single-member LLCs. Even if you have a regular W-2 job, you may need to pay SE tax on your side business income.
Can I deduct half of my self-employment tax?
Yes — the IRS allows you to deduct the employer-equivalent portion (half) of your SE tax when calculating your adjusted gross income (AGI). This deduction is taken on Schedule 1 of Form 1040 and reduces your federal income tax liability. This calculator shows your deductible half amount in the results section.
What is the Social Security wage cap for 2026?
For 2025, the Social Security wage base is $176,100. This means only the first $176,100 of your combined SE tax base is subject to the 12.4% Social Security portion. The 2.9% Medicare portion has no wage cap. High earners may also be subject to an additional 0.9% Medicare surtax on income over $200,000 ($250,000 married filing jointly).
Data Sources & Methodology
Our Self-Employment Tax Calculator uses 2026 federal tax rates from official IRS sources. All data is verified as of May 2026.
- SE Tax Rate: 15.3% (12.4% SS + 2.9% Medicare) from IRS Schedule SE.
- SE Tax Base: 92.35% of net earnings per IRS Section 1402(a) from US Code Title 26 § 1402.
- Social Security Wage Cap: $176,100 for 2026 from IRS Revenue Procedure.
How We Calculate: Net SE income is reduced by business deductions, then 92.35% of that amount is the SE tax base. Social Security tax (12.4%) is applied up to the wage cap of $176,100. Medicare tax (2.9%) is applied to the full SE tax base with no cap. The deductible half (employer-equivalent portion) is calculated as 50% of total SE tax.
📖 Related Reading
For more details on self-employment taxes, read our Self-Employment Tax Tips for 2026 Guide. Also see our Side Hustle Tax Guide.