Quick start
- Open the Income Tax Calculator.
- Choose filing status first because it changes the standard deduction and bracket thresholds.
- Enter gross ordinary income before deductions.
- Leave deduction blank for the 2026 standard deduction, or enter a custom deduction and credits.
- Calculate, then read taxable income, estimated federal tax, effective rate, and marginal bracket separately.
Best uses
Start here if one of these sounds like your job. The examples below show which inputs matter most.
- Estimate 2026 U.S. federal ordinary income tax for planning.
- Compare filing statuses with the standard deduction or a custom deduction.
- See taxable income, estimated federal tax, effective rate, and marginal bracket.
- Use a transparent estimate before checking IRS forms, withholding, tax software, or a tax professional.
What this calculator is for
The Income Tax Calculator estimates 2026 U.S. federal ordinary income tax. It applies the standard deduction or your custom deduction, runs the taxable income through 2026 brackets, then subtracts credits you enter.
Good fit examples: Estimate 2026 U.S. federal ordinary income tax for planning. Compare filing statuses with the standard deduction or a custom deduction.
What to enter
Finance estimates are sensitive to small input changes. Check whether a field expects a monthly amount, annual amount, dollar value, or percent before calculating.
- Choose filing status because the standard deduction and brackets depend on it.
- Enter gross ordinary income before deduction.
- Leave deduction blank for the 2026 standard deduction, or enter your own deduction and credits if you are testing a scenario.
Example walkthrough
Try the calculator example: Single filer: $100,000 income, 2026 standard deduction. The example result is $83,900 taxable income and about $13,170 federal ordinary income tax.
- For a single filer with $100,000 gross income, the calculator subtracts the $16,100 standard deduction and gets $83,900 taxable income.
- That taxable income is taxed in layers, so the estimate is about $13,170 before credits, not 22% of the whole $100,000.
Formula and steps
In plain language: The calculator subtracts the selected deduction from gross income, applies the 2026 U.S. federal ordinary income tax brackets, then subtracts credits you enter. For the starter example, $100,000 single income minus the $16,100 standard deduction gives $83,900 taxable income. Bracket math gives about $13,170 tax before any credits entered.
If the estimate looks surprising, check the formula and inputs before using the answer in a budget, comparison, or planning note.
How to read the answer
Start with the headline result. Then read the supporting lines to see what made the number larger or smaller, such as rates, time periods, costs, taxes, fees, discounts, or contributions.
- Taxable income is gross income minus the deduction used.
- Effective rate compares estimated federal tax with gross income.
- Marginal rate is the bracket rate on the next ordinary dollar, not the rate on all income.
Common mistakes to avoid
Most bad finance estimates come from mixing rates, terms, monthly amounts, and annual amounts. The other common mistake is using a planning estimate as if it were a final quote.
- Do not use this as a complete tax return.
- Do not forget payroll tax, state tax, capital gains, phaseouts, AMT, and credits not entered.
- Do not rely on old-year brackets when planning for 2026.
What to try next
A related money tool can help check the same question from another angle before you rely on one result.
- Use Salary Calculator for paycheck-style conversions.
- Use official IRS forms or a tax professional for filing decisions.
Sources and estimate notes
IRS 2026 inflation-adjustment sources set the standard deductions and ordinary income bracket thresholds used here. IRS withholding sources, including Publication 15-T and Publication 505, are useful because tax owed, paycheck withholding, estimated tax, and refund size are different questions.
This calculator still stays simple. It does not file a return, calculate state tax, payroll tax, capital gains, AMT, penalties, every credit, withholding, or refund size.
Worked examples for Income Tax Calculator
$83,900 taxable income and about $13,170 federal ordinary income tax
$127,800 taxable income and about $17,540 federal ordinary income tax
$70,000 taxable income and about $8,301 federal ordinary income tax
FAQ in plain language
When should I use the Income Tax Calculator?
Use it when you want to test the exact inputs on this page: Estimate 2026 U.S. federal ordinary income tax for planning. Compare filing statuses with the standard deduction or a custom deduction. The result is a check against your assumptions, not proof that a lender, tax app, broker, platform, or provider will use the same number.
What do the main Income Tax Calculator inputs mean?
Filing status means the IRS filing bucket used for the 2026 standard deduction and bracket thresholds. Gross ordinary income means the ordinary income you want to test before this calculator subtracts a deduction. Deduction means the amount removed before brackets. Leave it blank to use the 2026 standard deduction for the filing status. Credits means dollar-for-dollar reductions you want to test after bracket tax is calculated.
What 2026 tax brackets does this use?
It uses the IRS 2026 ordinary income bracket thresholds and standard deductions. For example, the single standard deduction is $16,100, married filing jointly is $32,200, and head of household is $24,150.
Why is my marginal rate higher than my effective rate?
The marginal rate is the rate on the next ordinary dollar. The effective rate compares estimated tax with gross income. A single filer at $100,000 can land in the 22% bracket while the effective federal ordinary income tax rate is about 13.17%.
Is this a paycheck or refund calculator?
No. It does not know your W-4, paycheck timing, payroll tax, state tax, withholding, estimated payments, refund history, or employer deductions. Use it for federal ordinary income tax math, then check IRS withholding tools or tax software for filing details.
What is the Income Tax Calculator doing with my numbers?
In plain language: The calculator subtracts the selected deduction from gross income, applies the 2026 U.S. federal ordinary income tax brackets, then subtracts credits you enter. For the starter example, $100,000 single income minus the $16,100 standard deduction gives $83,900 taxable income. Bracket math gives about $13,170 tax before any credits entered.
How should I read the Income Tax Calculator answer?
Read taxable income first, then the estimated federal tax. Effective rate shows tax compared with gross income. Marginal bracket shows the rate on the next ordinary dollar, not the rate on every dollar.
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Keep exploring
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Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to save the inputs and result in notes, homework, a message, or a project list. Check the units, labels, and limits before copying.