Self-Employment Tax Calculator
Estimates SE tax (Social Security + Medicare) on net self-employment income.
Every calculation runs instantly in your browser, so your inputs are never sent to a server, and the tool is free with no sign-up. You can save the results as an Excel file with live formulas and reuse them later.
Inputs
- Net self-employment income ($)
Example calculation
Self-employment tax: $8,478
| Taxable base (92.35%) | $55,410 |
|---|---|
| Social Security (12.4%) | $6,871 |
| Medicare (2.9%) | $1,607 |
| Deductible half | $4,239 |
Method & notes
SE tax = 15.3% of 92.35% of net earnings (Social Security 12.4% up to $184,500; Medicare 2.9%). Half is deductible for income tax. Excludes the 0.9% additional Medicare over $200k. 2026 estimate.
Tips
Change any input and the result recalculates in real time. After downloading the Excel file, you can reuse it by editing only the yellow input cells.
FAQ
How does the Self-Employment Tax Calculator work?
Estimates SE tax (Social Security + Medicare) on net self-employment income. SE tax = 15.3% of 92.35% of net earnings (Social Security 12.4% up to $184,500; Medicare 2.9%). Half is deductible for income tax. Excludes the 0.9% additional Medicare over $200k. 2026 estimate.
Can I save the results?
Yes. You can download the results for free as an Excel (.xlsx) file with live formulas that recalculate when you change the yellow input cells.
Is it free?
Yes — all Calcova calculators are free, and you can save results as an Excel file.