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United States federal income tax calculator

Estimate US federal income tax using progressive brackets and the standard deduction for your filing status. State income tax is not included.

Tax year 2026 · Not yet verified · Official source

Tax year 2026 · Federal only

Results

Federal income tax
$7,670.00
Standard deduction
$16,100.00
Taxable income
$58,900.00
Effective rate
10.2%

How this calculator works

  • Subtract the standard deduction for your filing status from gross income.
  • Apply federal tax brackets to taxable income (marginal rates).
  • No itemized deductions, credits, AMT, or NIIT in this version.

Taxable income = max(0, gross − standard deduction). Tax = Σ (income in bracket × rate).

Worked example

Single filer, $26,100 gross (tax year in data file).

Inputs

  • Gross$26,100
  • Standard deduction$16,100

Results

  • Taxable$10,000
  • Federal tax$1,000

Frequently asked questions

Are state taxes included?

No. Add state and local taxes separately.

Can I model itemized deductions?

Not yet. This tool always uses the standard deduction from the data file.

Where do brackets come from?

From data/tax/us/{year}.json — confirm against the IRS before relying on results.

Is this the same as paycheck withholding?

Annual liability estimate only. Withholding uses Form W-4 and payroll tables.

Sources and disclaimer

Estimates only — not tax advice. Verify rates in the country tax data file and with the official authority. State/local rules, credits, and special regimes may be omitted.

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