Income Tax Calculator
Estimate your federal income tax by bracket.
Estimate using 2025 federal brackets, Single. Does not include state tax, credits, or FICA.
About the Income Tax Calculator
Estimate what you'll owe in federal income tax. Choose your filing status, enter your gross income and deductions (or use the standard deduction), and the calculator applies the 2025 federal tax brackets to show your total tax, taxable income, marginal bracket, effective rate, and after-tax income. It's a fast, clear estimate for planning withholdings, quarterly payments, or a big financial decision — before you dig into a full return.
How to use the Income Tax Calculator
- 1Enter your filing status, gross income, and deductions.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust the numbers to model different scenarios.
Frequently asked questions
How is federal income tax calculated?
The U.S. uses progressive brackets: each slice of taxable income is taxed at its bracket's rate. Your marginal rate is the top bracket you reach; your effective rate is the blended average.
Does this include state tax and FICA?
No — this estimates federal income tax only. For Social Security and Medicare and a net paycheck, use the Take-Home Paycheck Calculator.
Which year's brackets does it use?
The 2025 federal brackets and standard deduction. Brackets adjust each year for inflation, so treat the result as an estimate.