Which tax year does this calculator use?

It uses tax year 2026 brackets and standard deductions published by the IRS. Those rules generally apply to income earned in 2026 and returns filed in 2027.

Does entering a higher bracket tax all my income at that rate?

No. Federal brackets are progressive. Only taxable income inside each layer is taxed at that layer's rate; the marginal rate applies to the next dollar.

Are refundable tax credits included?

No. The credit input is treated as nonrefundable and cannot reduce tax below zero. Eligibility, phaseouts, and refundable portions require a fuller return calculation.

Does this estimate include payroll or state tax?

No. It estimates regular federal income tax only and excludes FICA, self-employment tax, state and local tax, AMT, NIIT, and special-rate income.

Taxes calculator

2026 Federal Income Tax Calculator

Estimate regular 2026 US federal income tax from gross income, filing status, adjustments, deductions, and nonrefundable credits, with taxable income and rates shown separately.

Formula: Shown below
Data: Stays private
Result: Updates live

Written by the ToolGrym Editorial Team

Last reviewed: July 19, 2026

Test method Primary sources

Calculation workspace

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No submit button — results update as you type.

Estimated 2026 federal income tax

$13,170

Regular federal income tax after entered nonrefundable credits

Tax before credits: $13,170
Credits used: −$0
Effective federal rate: 13.2%
Marginal bracket: 22%

Taxable-income worksheet

$83,900

Amount subjected to the regular 2026 brackets

Adjusted gross income: $100,000
Standard deduction used: −$16,100
2026 standard deduction: $16,100

Educational 2026 regular-tax estimate. It excludes refundable-credit eligibility, state and local tax, payroll tax, AMT, Net Investment Income Tax, qualified dividends, capital gains, and situation-specific limitations.

What this 2026 federal tax estimate calculates

The calculator starts with gross income, subtracts entered adjustments, then compares itemized deductions with the official standard deduction for the selected filing status. The larger deduction is used to produce taxable income. The 2026 progressive tax brackets are applied one layer at a time, and entered nonrefundable credits are subtracted from the calculated regular tax.

The result separates four numbers that are often mixed together: adjusted gross income, taxable income, marginal rate, and effective rate. Adjusted gross income is income after the entered above-the-line adjustments. Taxable income is what remains after the deduction. The marginal rate is the bracket applied to the next dollar of taxable income. The effective rate is estimated tax after entered credits divided by gross income.

Official 2026 amounts used

The standard deduction is $16,100 for single and married-filing-separately returns, $32,200 for married couples filing jointly, and $24,150 for heads of household. Regular rates remain 10%, 12%, 22%, 24%, 32%, 35%, and 37%, but each filing status has different thresholds.

For a single filer, for example, the first $12,400 of taxable income is in the 10% layer and the next layer through $50,400 is taxed at 12%. Reaching the 22% bracket does not cause the first two layers to be recalculated at 22%.

Worked example: $100,000 single filer

Assume $100,000 of gross income, no adjustments, no itemized deductions, and no credits. The calculator uses the $16,100 standard deduction, leaving $83,900 of taxable income. Applying each bracket produces approximately $13,170 of regular federal income tax.

The marginal rate is 22% because the last taxable dollar is inside the 22% bracket. The effective federal income-tax rate is about 13.2% of gross income. Neither percentage represents payroll tax, state tax, or the share of income lost to every possible tax.

What the estimate intentionally excludes

This is not a substitute for Form 1040 or tax software. It does not determine whether an adjustment or deduction is eligible, apply deduction limitations, calculate refundable credits, or model alternative minimum tax. Qualified dividends and long-term capital gains may use preferential rates and belong in the capital gains tax calculator. Business profit may also create self-employment tax; estimate that separately with the self-employment tax calculator.

If the goal is to compare liability with payments already made, use the tax refund estimator. A refund is not the same number as tax liability.

Frequently asked questions

Which tax year does this calculator use?: It uses tax year 2026 brackets and standard deductions published by the IRS. Those rules generally apply to income earned in 2026 and returns filed in 2027.
Does entering a higher bracket tax all my income at that rate?: No. Federal brackets are progressive. Only taxable income inside each layer is taxed at that layer's rate; the marginal rate applies to the next dollar.
Does the calculator choose standard or itemized deductions?: Yes. It compares the entered itemized deduction with the official standard deduction for the selected filing status and uses the larger amount.
Are refundable tax credits included?: No. The credit input is treated as nonrefundable and cannot reduce tax below zero. Eligibility, phaseouts, and refundable portions require a fuller return calculation.
Does this estimate include payroll or state tax?: No. It estimates regular federal income tax only and excludes FICA, self-employment tax, state and local tax, AMT, NIIT, and special-rate income.

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Written by

ToolGrym Editorial Team

The ToolGrym editorial team builds and maintains every calculator on this site. Each tool’s formulas are implemented as tested code and verified against authoritative sources such as the CFPB, Federal Reserve, IRS, and BLS.