US Self-Employment Tax Calculator

About this tool

Freelancers, sole proprietors and independent contractors pay both halves of Social Security and Medicare tax, known as self-employment tax. This calculator applies the official 2025 rules: about 92.35% of your net profit is taxed at 15.3% (12.4% Social Security up to the wage base plus 2.9% Medicare), with an extra 0.9% Medicare tax on income above $200,000. Enter your net self-employment profit to see the taxable base, the Social Security and Medicare portions, and the deductible half you can claim on your return. Every rule is editable so you can stress-test different income levels. Fast, private, and free.

How to use

1. 1Enter your net self-employment profit
2. 2Review the taxable share of profit and each tax component
3. 3Check the deductible half you can claim
4. 4Adjust the rates or thresholds to model different scenarios

Pros & Cons

Features

• 100% free to use
• No registration required
• Processes locally in your browser
• Works on all devices

Privacy

Your data is processed entirely in your browser and never sent to our servers. We have no access to your files or data.

Frequently Asked Questions