Marginal vs Effective Tax Rate Calculator

Marginal vs effective tax rate: what they actually mean

Your marginal tax rate and your effective tax rate answer two different questions. The marginal rate is the tax on your next dollar: the highest bracket your income reaches. The effective rate is the average across every dollar you earn, which is your total tax divided by your total income. Because the federal system is progressive, the average always comes out the smaller of the two.

Take a single filer earning $75,000 in 2026. After the standard deduction their taxable income lands in the 22% bracket, so their marginal rate is 22%. But only the slice above $50,400 is taxed at 22%. The first dollars are taxed at 10% and 12%, so the effective federal rate works out to roughly 10%, less than half the headline bracket. Brackets are marginal, not flat, and that gap is the whole point.

How to calculate your effective tax rate

Start with gross salary and subtract any pre-tax deductions and the standard deduction ($16,100 single, $32,200 married filing jointly, $24,150 head of household for 2026) to get your federal taxable income. Then stack the brackets: tax each slice of income at its own rate and add them up. That total, divided by your gross salary, is your effective federal rate. The calculator above runs each step and lists the per-bracket tax so you can see exactly where the money goes.

One note on the denominator: this tool shows effective rates against gross salary, the number most people search for. Some worksheets divide by taxable income instead, which gives a slightly higher figure. Either way, the bracket-by-bracket table shows the raw tax before any averaging, so you can check the math yourself.

Why your marginal rate matters more than you think

The marginal rate is the one to reach for whenever you are deciding about extra money. A pre-tax 401(k) or HSA contribution saves you tax at your marginal rate, not your average one, so a dollar deferred in the 22% bracket costs you less than a dollar of take-home. The same logic drives bonuses, overtime, side income, and Roth conversion planning: the last dollars in, and the first dollars out, are priced at the margin.

This is also where the most common tax myth lives. Crossing into a higher bracket never lowers your take-home pay. Only the income above the new threshold is taxed at the higher rate; everything below it keeps its old rates. A raise always leaves you with more money in hand. If you want to pressure-test a specific raise, the Salary Raise to Beat Inflation Calculator and the Second Job Take-Home Calculator both work the marginal-rate angle directly.

Federal, FICA, and state: your true total rate

Federal income tax is only one layer. FICA adds Social Security at 6.2% up to the 2026 wage base of $184,500, then Medicare at 1.45% on all wages, plus a 0.9% Additional Medicare surtax above $200,000 (single or head of household) or $250,000 (married filing jointly). FICA is charged on your gross wages, so it stays put even when pre-tax deductions cut your income tax. State tax is the third layer, and it varies enough that this tool treats it as an editable estimate rather than pretending a single flat rate is exact.

The effective total rate at the top of the results folds all three layers together, which is closer to what actually leaves your paycheck than the federal figure alone. For an exact, state-specific paycheck with the full W-4, deductions, and items like SDI and PFL, download the Stub44 Salary Calculator app. To keep exploring on the web, the Net to Gross Salary Calculator works the tax math in reverse, and the State Relocation Take-Home Comparison extends the state dimension this tool approximates.