The US federal income tax system is progressive, meaning different portions of your income are taxed at different marginal rates — a common misconception is that your entire income gets taxed at your top bracket rate, which isn't how it actually works.
This calculator applies the simplified 2024 federal tax bracket structure to your taxable income, showing your marginal bracket (the rate on your last dollar earned), the total estimated tax, and your effective rate (total tax as a percentage of total income, which is always lower than the marginal rate).
This is a simplified estimate using standard brackets only — it doesn't account for deductions, credits, other income types, or state taxes, so actual tax liability will differ; consult a tax professional or official IRS resources for accurate filing guidance.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
Frequently asked questions
Why is my effective tax rate lower than my marginal bracket?
Because only the portion of income within each bracket is taxed at that bracket's rate — lower portions of your income are still taxed at the lower rates below your top bracket, pulling the overall average (effective rate) down.
Does this account for deductions like the standard deduction?
No, this is a simplified estimate based on taxable income directly; actual tax liability depends on your specific deductions, credits, and other factors not included here.