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Federal Income Tax Calculator (2026)

This 2026 federal income tax calculator estimates regular federal income tax after the standard deduction and selected credits. It uses 2026 tax brackets and standard deduction amounts published by the IRS.

Updated 2026-07-09Reviewed by US Finance Hub Editorial TeamCalculations run in your browser

Quick answer

Federal income tax is progressive: only the income inside each bracket is taxed at that bracket’s rate. Your marginal rate is not applied to all taxable income.

Calculator

Enter your numbers

Total income before deductions.
Federal filing status.
Deductions in addition to the standard deduction for this simplified estimate.
Estimated nonrefundable credits.

How to use this calculator

  1. Enter gross annual income.
  2. Select a federal filing status.
  3. Add any extra deductions and estimated credits.
  4. Review taxable income, marginal rate, effective rate, and estimated tax.

Explanation

What it is

This 2026 federal income tax calculator estimates regular federal income tax after the standard deduction and selected credits. It uses 2026 tax brackets and standard deduction amounts published by the IRS.

How it works

The calculator subtracts the selected 2026 standard deduction and other entered deductions from gross income, then applies each progressive tax bracket. Entered credits reduce estimated tax dollar for dollar, not below zero.

When to use it

Use this calculator to compare realistic scenarios before making a financial decision, and update the inputs when rates, costs, income, or goals change.

Limitations

  • The result is an estimate based only on the inputs and assumptions shown.
  • It does not evaluate eligibility, product terms, market conditions, or personal legal and tax circumstances.
  • Actual outcomes can differ because of fees, timing, rounding, taxes, and provider-specific methods.

Key terms

Gross income
Income before deductions and credits.
Taxable income
Income remaining after applicable deductions.
Marginal tax rate
The rate applied to the next dollar of taxable income.
Effective tax rate
Estimated tax divided by gross income.
Tax credit
An amount that directly reduces tax, subject to eligibility rules.

Formula

The calculator subtracts the selected 2026 standard deduction and other entered deductions from gross income, then applies each progressive tax bracket. Entered credits reduce estimated tax dollar for dollar, not below zero.

Estimated tax = Σ(taxable income within each bracket × bracket rate) − credits

Worked example

For $85,000 of gross income, the calculator subtracts the selected 2026 standard deduction, applies each progressive bracket, and then subtracts entered credits.

FAQ

What are the federal tax brackets for 2026?

For 2026, regular federal income tax rates remain 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The taxable-income ranges differ by filing status.

What is the standard deduction for 2026?

For 2026, the standard deduction is $16,100 for single or married filing separately, $32,200 for married filing jointly, and $24,150 for head of household.

Why is my marginal tax rate higher than my effective rate?

The marginal rate applies only to the top portion of taxable income. Lower portions are taxed at lower rates, so the average effective rate is usually lower.

Does this estimate include state income tax?

No. State and local taxes, self-employment tax, alternative minimum tax, net investment income tax, and many special rules are outside this simplified estimate.

Can I use this result to file my tax return?

No. Use official IRS forms, approved software, or a qualified tax professional. This tool is for general planning only.

Does the calculator include child tax credits or itemized deductions automatically?

No. Enter estimated credits and additional deductions only when you understand your eligibility. The calculator does not determine eligibility for specific tax provisions.

Common mistakes

  • Applying the marginal rate to all income.
  • Confusing deductions with credits.
  • Assuming the estimate includes state tax.
  • Using the result as a filed tax return.

Tips

  • Use the correct tax year.
  • Check eligibility before entering deductions or credits.
  • Compare withholding with the projected annual liability.
  • Use official IRS forms or qualified help for filing.

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Sources and editorial review

Educational estimates only; not personalized financial, tax, legal, lending, investment, or insurance advice.