Marginal vs Effective Tax Rate Calculator

Almost every taxpayer confuses their marginal tax rate with their effective tax rate at least once — and the confusion costs people real decisions. Someone told "you're in the 22% bracket" often assumes the government takes 22 cents of every dollar they earn. It doesn't. This calculator exists to make that gap visible, not just explainable.

Your marginal tax rate is the rate applied to your last dollar of taxable income — the highest bracket your income reaches. Your effective tax rate is your total federal tax divided by your gross income, expressed as a percentage. Because the U.S. federal income tax system is progressive, layering higher rates only onto the income above each threshold, your effective rate is always lower than your marginal rate for anyone with taxable income above $0.

The stacked-bar chart below slices your income by federal bracket, so instead of a single blended percentage, you can see exactly how many dollars were taxed at 10%, how many at 12%, how many at 22%, and so on. This is the same underlying bracket math used by the Income Tax Estimator — this calculator simply reframes the output to focus on the marginal-vs-effective distinction and its visual proof.

This distinction matters most when evaluating a raise, a bonus, or a side-income opportunity. A raise that pushes part of your income into a higher bracket only raises the tax rate on the incremental dollars above that threshold — never on the income you were already earning. Understanding this prevents people from turning down raises or extra income out of a mistaken fear of "jumping a bracket."

This calculator estimates federal income tax only, using 2026 IRS brackets and the standard deduction. It does not include state income taxes, FICA (Social Security and Medicare), self-employment tax, or the Alternative Minimum Tax. For a complete take-home picture, use the Take-Home Pay calculator.