About the Federal Income Tax Calculator
This free federal income tax calculator helps people in the United States get a quick, private estimate before they talk to a lender, insurer, employer or advisor. There is no signup, nothing is stored on our servers and every result updates instantly in your browser.
How this calculator works
The calculator subtracts the standard deduction, then applies US federal marginal brackets progressively: each slice of income is taxed only at its own rate, not the whole amount.
Worked example
A single filer with $80,000 income has about $64,250 taxable after the standard deduction and owes roughly $9,000 in federal tax, an effective rate near 11%. Change any input above to see how the result moves, which is the fastest way to understand which factor matters most for you.
Tips to get a better result
Contribute to a 401(k) or IRA to lower taxable income, and check eligibility for credits. Marginal rate and effective rate are different things.
Key factors that change your result
US federal tax is progressive: each bracket rate applies only to the income inside that bracket. Credits, itemized deductions, self-employment tax and other income types are not modeled, so use this for planning rather than filing.
Accuracy and limits
Every calculator on Tools30 uses standard published formulas combined with average US market assumptions. Real offers depend on your credit profile, state, provider and personal circumstances, so treat the output as a starting point and confirm with an official quote or a licensed professional. Read more on our methodology page.
Frequently asked questions
What is a marginal tax rate?
The rate on your last dollar of income. It does not apply to all your income.
Does this include state tax?
No. This is federal estimate only. Use the paycheck calculator for a state estimate.
Is the federal income tax calculator free to use?
Yes. Every calculator on Tools30 is free with no registration.
Do you store the numbers I enter?
No. Calculations run in your browser and nothing you type is sent to our servers.