Free Self-Employment Tax Calculator Spreadsheet Template
Estimate self-employment tax liability based on net earnings. Calculate Social Security and Medicare taxes for self-employed individuals.
What's Included
- Dashboard with SE tax estimate showing total self-employment tax, deductible half, and effective tax rate
- Calculator with net self-employment income, business deductions, and filing status inputs for accurate estimates
- Social Security (12.4%) and Medicare (2.9%) breakdowns calculated separately on 92.35% of net earnings
- Quarterly estimated payment amounts dividing the annual SE tax into four equal installments with due dates
- Deductible half of SE tax display with color-coded input cells (yellow) and auto-calculated results (blue)
- Works in Microsoft Excel, Google Sheets, and LibreOffice Calc with no setup required
Preview
See what's inside this template
How to Use This Self-Employment Tax Calculator Template
Enter net earnings
Input your net self-employment income after business deductions. This is the starting figure for SE tax calculation.
Review SE tax breakdown
The calculator shows the Social Security portion (12.4%) and Medicare portion (2.9%) computed on 92.35% of net earnings.
See the deductible half
Half of the SE tax is deductible on your income tax return. The template shows this amount separately.
Check quarterly amounts
The estimated quarterly payment divides the annual SE tax into four equal installments with the due dates listed.
Built by Claude AI. Perfected by us.
We use Claude AI to draft each free template, after a deep research. Then our team steps in. We refine the layout, stress-test every formula, fix edge cases, and polish the design until it feels like something we would actually use ourselves. The AI gets us 80% there. The last 20% is all human judgment.
Frequently Asked Questions
Why is SE tax calculated on 92.35%?
The 92.35% factor simulates the employer half of payroll tax that employees do not pay. It reduces the taxable base before applying the SE tax rates.
What is the deductible half?
Self-employed individuals can deduct half of the SE tax on their income tax return. This reduces adjusted gross income and overall tax liability.
Does this include income tax?
No. This calculator covers self-employment tax only (Social Security and Medicare). Federal and state income taxes are separate calculations.
When are quarterly payments due?
Estimated tax payments are due April 15, June 15, September 15, and January 15 of the following year. The template lists these dates.
How do I open this in Google Sheets?
Upload the .xlsx file to Google Drive, then open it with Google Sheets. All formulas and formatting will be preserved.
What license is this template under?
All free templates are released under CC BY 4.0 (Creative Commons Attribution). You can use, modify, and share them freely - including for commercial purposes - as long as you credit FinancialAha.com. They are provided as-is and do not constitute financial advice.
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