Federal Income Tax Calculator
Estimate your US federal income tax using progressive brackets and standard or itemized deductions. Enter your annual gross income, pre-tax deductions (e.g. 401k), and deduction method. Results show total tax, taxable income, effective and marginal rates, take-home pay, and a bracket-by-bracket breakdown. This is an estimate for planning only—not for filing. Use official IRS tools or a tax professional for filing.
Federal income tax estimate
Bracket estimate (2024). Not for filing.
How it works
Taxable income = gross income − pre-tax deductions − (standard or itemized) deduction. Tax is computed by applying each bracket rate to the income in that bracket. The standard deduction depends on filing status (2024 values). We sum tax across brackets to get total federal tax; effective rate = total tax ÷ gross income; marginal rate is the rate on your last dollar of taxable income.
When to use it
Use it to plan withholding, compare job offers by after-tax pay, estimate liability before year-end, or see how a deduction or filing status change affects your tax. Pair with a take-home or W-4 tool for paycheck planning.
Frequently asked questions
Which year are the brackets?
We use 2024 federal brackets and standard deductions. Label the result as an estimate; update the calculator when IRS publishes new figures.
Does this include state or FICA?
No. This is federal income tax only. State tax and FICA (Social Security, Medicare) are separate.
Why itemized vs standard?
You take the larger of standard or itemized. If your itemized deductions (e.g. mortgage interest, SALT) exceed the standard amount, enter Itemized and the total.