Self-Employment Tax Calculator

Calculate your 2026 self-employment tax. 15.3% SE tax breakdown: 12.4% Social Security + 2.9% Medicare. Includes deductible portion and quarterly estimated payment schedule.

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Affects Social Security wage base cap

How Self-Employment Tax Works

  1. Net SE income is multiplied by 92.35% to get taxable SE earnings.
  2. Social Security tax (12.4%) applies up to the wage base ($176,100 for 2026).
  3. Medicare tax (2.9%) applies to all SE earnings with no cap.
  4. Additional Medicare tax (0.9%) applies above $200K (single) or $250K (MFJ).
  5. 50% of SE tax is deductible from gross income on your 1040.

2026 SE Tax Rates

  • Combined SE tax rate: 15.3% (12.4% SS + 2.9% Medicare)
  • Social Security wage base: $176,100
  • Additional Medicare threshold: $200,000 (Single), $250,000 (MFJ)
  • Quarterly estimated payments due Apr 15, Jun 15, Sep 15, Jan 15
  • 100% client-side -- no data sent anywhere

Disclaimer:This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.