Self-Employment Tax Calculator
Estimate Social Security and Medicare self-employment tax on net earnings.
Methodology & standardsRuns on your device
Inputs
Results update liveCite this calculator
Uses IRS-style 92.35% taxable base and 2025 wage base default. Not a full return estimate.
Last reviewed: August 2026
Self-Employment Tax Calculator. (August 2026). Useful Tools Online. https://usefultoolsonline.com/self-employment-tax-calculator/
Interpretation
SE tax basics
Self-employed individuals pay both employer and employee portions via SE tax. An extra 0.9% Additional Medicare applies to earnings above the filing threshold (single $200k / joint $250k); this estimator uses $200k unless you adjust.
Watch out
Common mistakes
- Using gross revenue instead of net earnings.
- Ignoring W-2 wages that reduce the Social Security cap room.
- Forgetting the 0.9% Additional Medicare on high earnings (single over $200k).