Income Tax Calculator
Estimate 2026 U.S. federal income tax using filing status, income, and deductions.
Last updated: July 2026
Estimated federal income tax
$0.00
- Taxable income: $0.00
- Marginal rate: 0%
- Effective rate: 0%
- After federal tax: $0.00
On this page
Quick summary: Estimate 2026 U.S. federal income tax using filing status, income, and deductions. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator does
The Income Tax Calculator estimates tax from taxable income and the rate assumptions built into the page. It is useful for rough planning, not for filing an official tax return.
How to use the calculator step by step
Enter the income and any requested deductions, filing assumptions, or tax rate inputs shown by the calculator. Keep all figures for the same tax year and jurisdiction.
How the calculation works
A simple income-tax estimate applies the relevant tax rate or brackets to taxable income. In progressive systems, different portions of income may be taxed at different marginal rates.
Worked example and scenario testing
If taxable income falls across several brackets, only the portion inside each bracket is taxed at that bracket's rate. A person entering a higher bracket does not usually pay the top rate on all income.
How to interpret your result
The result is an estimate of tax under the assumptions entered. Effective tax rate and marginal tax rate are different concepts and can produce very different percentages.
Accuracy, assumptions, and limitations
Actual tax can depend on deductions, credits, filing status, local taxes, dependents, investment income, payroll withholding, and law changes.
Common mistakes to avoid
Do not multiply all income by the highest marginal rate. Also avoid using gross income when the calculator expects taxable income after deductions.
Privacy and browser-based calculations
Use only general income figures. Do not enter tax IDs, Social Security numbers, employer IDs, or filing credentials.