US Federal Income Tax Calculator (2025)
Estimate your 2025 US federal income tax. Enter your gross income and filing status, and the calculator subtracts the standard deduction, applies the 2025 brackets, and shows your tax, effective rate and after-tax income.
How to use the income tax calculator
- Enter your gross annual income before any deductions.
- Choose your filing status (single, married, or head of household).
- Review the taxable income, federal tax, effective and marginal rates, and after-tax income. Override the deduction if you itemize.
Examples
$50,000 income, single filer, standard deduction
Gross income 50000, filing status single, deduction 15000 (standard)
Taxable income $35,000, federal tax $3,961.50, effective rate 7.92%, marginal rate 12%, after-tax income $46,038.50
Frequently asked questions
What is the difference between the marginal and effective tax rate?
Your marginal rate is the bracket that applies to your last dollar of taxable income (for example 22%). Your effective rate is total tax divided by gross income, which is lower because earlier dollars are taxed at the lower 10% and 12% brackets.
What does this calculator include?
It estimates 2025 US federal income tax only, using the standard deduction and the IRS marginal brackets for your filing status. It does not include Social Security or Medicare (FICA), state or local taxes, tax credits, or the alternative minimum tax.
Which deduction does it use?
By default it applies the 2025 standard deduction: $15,000 for single, $30,000 for married filing jointly, and $22,500 for head of household. You can enter your own deduction amount if you itemize.
Is my income data private?
Yes. The calculation runs entirely in your browser. Your income and filing status are never sent to a server or stored, so nothing leaves your device.
Why is my taxable income lower than my salary?
Taxable income is your gross income minus deductions. The calculator subtracts the standard deduction (or your itemized amount), so tax is applied to the smaller taxable figure rather than your full salary.
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