Estimate your self-employment tax and federal income tax for 2025. This calculator applies the 15.3% SE tax rate, the SE tax deduction, and the 2025 federal tax brackets — so you know exactly what to set aside and how much to pay quarterly.
What Is Self-Employment Tax?
Self-employment tax covers Social Security (12.4%) and Medicare (2.9%) — a combined 15.3% rate. Employees split this with their employer, but self-employed individuals pay the full amount. However, you can deduct half of it from your gross income.
Frequently Asked Questions
When are quarterly estimated taxes due in 2025?
Quarterly tax payments are due on: April 15, June 16, September 15, and January 15, 2026. Missing deadlines can result in underpayment penalties.
Do I need to pay SE tax if I earn less than $400?
No. If your net self-employment income is less than $400 for the year, you do not owe self-employment tax.
Can I deduct business expenses to lower my SE tax?
Yes. SE tax is based on your net profit (income minus business expenses). Tracking and deducting legitimate business expenses reduces your taxable SE income.
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