15.3% on 92.35% of net profit (Social Security capped at $176,100 wages in 2025).
Example: Net self-employment profit: $80,000 → Self-employment tax: $11,304.
Deductible half: $5,652
Effective SE rate: 14.1%
Frequently asked questions
How do I calculate self-employment tax? 15.3% on 92.35% of net profit (Social Security capped at $176,100 wages in 2025). Enter your numbers above and the result updates instantly. For example: Net self-employment profit: $80,000 → Self-employment tax: $11,304.
Is this Self-Employment Tax Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for self-employment tax. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.