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US Income Tax Calculator

Calculate 2026 federal income tax owed with bracket breakdown, effective rate, and marginal rate.

100% client-side — your data never leaves this tab

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What is US Income Tax Calculator?

US Income Tax Calculator computes 2026 federal income tax owed using IRS brackets after the standard deduction. See tax owed, effective rate, marginal rate, and a bracket-by-bracket breakdown for Single, Married Filing Jointly, Head of Household, or Married Filing Separately. Fully client-side — your income stays on your device.

Your income is processed only in your browser and is never sent to a server.

How to use US Income Tax Calculator

  1. 1Enter your annual gross income (before deductions).
  2. 2Select your 2026 filing status.
  3. 3Review federal tax owed, effective and marginal rates.
  4. 4Expand the bracket breakdown to see tax in each marginal band.

Examples

$50,000 single

Standard deduction $16,100 → taxable $33,900 → federal tax ~$3,800

$150,000 MFJ

Standard deduction $32,200 → marginal rate likely 22% or 24%

Tips & common mistakes

  • Effective rate is total tax divided by gross income; marginal rate is the tax on your next dollar.
  • This calculator uses the standard deduction — itemizers may owe less.
  • State and local taxes are not included here.

Who uses this tool?

  • Estimating federal tax before filing season.
  • Understanding which bracket your next raise falls into.
  • Quick what-if planning for side income or bonuses.

Frequently asked questions

What are the 2026 federal tax brackets?
Rates are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. For single filers, the 37% bracket starts at $640,600 taxable income. Brackets are inflation-adjusted per IRS Rev. Proc. 2025-32.
What is the 2026 standard deduction?
Single and MFS: $16,100. Married Filing Jointly: $32,200. Head of Household: $24,150.
How much federal tax on $100,000 income?
A single filer with $100,000 gross and standard deduction has ~$83,900 taxable income and owes roughly $14,000–$15,000 in federal income tax before credits.
What is effective vs marginal tax rate?
Marginal rate is the tax on your last dollar of income. Effective rate is average tax (total tax ÷ gross income), usually lower because lower brackets apply first.
Is this tax advice?
No. This is an estimate for informational purposes. Consult a CPA or tax professional for your specific situation.