Federal Income Tax Withholding Calculator
Calculate federal income tax withholding based on your salary, filing status, and W-4 allowances.
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How It Works
Federal income tax uses a progressive bracket system where only the income within each bracket is taxed at that rate. For 2025, a single filer pays 10% on the first $11,600, then 12% on income up to $47,150, and so on. Your effective rate (total tax / total income) is always lower than your marginal rate (the bracket your top dollar falls in).