How do I use the Income Tax Calculator?

Enter your gross annual income. Select your filing status: Single, Married Filing Jointly, or Head of Household. Choose standard deduction (auto-filled) or enter a custom deduction amount. Enter any tax credits (child tax credit, education credits, etc.). Click Calculate to see your estimated federal tax and effective rate.

Is the Income Tax Calculator free?

Yes, the Income Tax Calculator is completely free. It runs entirely in your browser with no signup, no download, and no data sent to any server.

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Income Tax Calculator

Estimate US federal income tax with 2025 brackets, standard deduction, and bracket breakdown.

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Income tax calculator (US)

Estimate your federal income tax

Calculate estimated US federal income tax based on 2025 brackets and standard deduction.

Gross annual income ($) Filing status Deduction type Custom deduction ($) Tax credits ($) Child tax credit, education, etc.

Tax estimate

Take-home pay

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Federal tax

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Effective rate

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Marginal bracket

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Bracket breakdown

Bracket	Range	Taxable	Tax

Summary

Gross income:

Deduction:

Taxable income:

Monthly take-home:

How to use

How to Use the Income Tax Calculator

1 Enter your gross annual income.
2 Select your filing status: Single, Married Filing Jointly, or Head of Household.
3 Choose standard deduction (auto-filled) or enter a custom deduction amount.
4 Enter any tax credits (child tax credit, education credits, etc.).
5 Click Calculate to see your estimated federal tax and effective rate.

The Income Tax Calculator uses 2025 US federal tax brackets to compute your estimated income tax. The US uses a progressive tax system — you pay increasing rates only on income within each bracket, not your entire income. Your effective tax rate (total tax / gross income) is always lower than your marginal bracket rate.

The standard deduction for 2025 is $15,700 for single filers, $31,400 for married filing jointly, and $23,500 for head of household. If your itemized deductions (mortgage interest, state taxes, charitable donations) exceed the standard deduction, choose custom deduction. Tax credits directly reduce your tax bill dollar-for-dollar, unlike deductions which only reduce taxable income.

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