Self-Employed Tax Calculator
Estimate your U.S. self-employment tax, federal income tax, and quarterly payment target.
What Is Self-Employment Tax?
If you work for yourself, you generally pay self-employment tax instead of having Social Security and Medicare withheld from a paycheck. For most freelancers, consultants, creators, and independent contractors, this tax is calculated at 15.3% of your eligible self-employment earnings.
- 12.4% for Social Security (subject to an annual wage base cap)
- 2.9% for Medicare (no cap for the basic rate)
The IRS applies this to about 92.35% of your net business profit, not your gross revenue.
How This Self Employed Tax Calculator Works
1) Net Profit
We start with your gross self-employment income and subtract ordinary business expenses. This gives net business profit.
2) Self-Employment Tax
We multiply net profit by 92.35% to get self-employment taxable earnings. Then we apply Social Security and Medicare rates separately.
3) Income Tax Estimate
You can set an estimated federal tax rate (for example, 12%, 22%, or 24%) to get a quick planning estimate. The calculator also subtracts the deductible half of self-employment tax before estimating taxable income.
4) Quarterly Tax Planning
The calculator shows a suggested quarterly payment amount based on your remaining estimated tax after payments already made.
Why Freelancers and Sole Proprietors Should Estimate Early
When taxes are not withheld automatically, it is easy to underpay during the year. Using a self employment tax estimator monthly helps you:
- Avoid surprise tax bills
- Reduce potential underpayment penalties
- Set aside cash in a dedicated tax savings account
- Adjust your pricing and client load with confidence
Quick Example
Suppose you earn $85,000 and have $12,000 in expenses:
- Net profit = $73,000
- SE tax base = $73,000 × 92.35% = $67,415.50
- SE tax ≈ Social Security + Medicare
- Half of SE tax is deductible for income tax purposes
This gives you a realistic baseline for quarterly estimated tax payments.
Tips to Lower Your Tax Bill Legally
Track every legitimate business expense
Software subscriptions, home office use, mileage, equipment, insurance, and professional services may reduce taxable profit if documented correctly.
Contribute to retirement accounts
Solo 401(k) and SEP IRA contributions can lower taxable income while building long-term wealth.
Save for taxes as you earn
A common rule of thumb is to set aside 25% to 35% of each payment, depending on your bracket and state taxes.
Revisit your estimate each quarter
Income fluctuates. Updating your numbers regularly keeps your estimate accurate and improves cash flow planning.
Important Notes
This calculator is designed for educational planning. Real tax returns may vary based on filing status, credits, qualified business income deduction, additional Medicare tax thresholds, and state/local taxes. For filing decisions, consult a CPA or enrolled agent.