Marginal vs effective tax rate: the difference that changes your refund

“How much is tax on a salary like mine?” is the question I get asked most — and it has two correct answers that sound like they contradict each other. Your marginal rate is the rate on your next dollar. Your effective rate is what you actually paid on all your dollars. Mix them up and you will overestimate your tax bill by thousands, fear raises you should happily take, and misjudge every bonus, overtime shift and side gig you are offered. Let me separate the two rates with one income, run through the brackets slowly, dollar by dollar.

The two rates, in plain language

Your marginal tax rate is the bracket your last dollar of taxable income landed in. Earn one more dollar and it is taxed at that rate. It is a forward-looking number: it prices decisions you have not made yet — extra work, a raise, a Roth conversion, a year-end bonus.

Your effective tax rate is a backward-looking average: your total federal tax divided by your income. Because your first dollars are taxed at 10%, the next slice at 12%, and only the top slice at your marginal rate, the effective rate is always lower — often dramatically lower. When people ask how much is income tax really costing them, the effective rate is the honest answer.

One income through the brackets, step by step

Take a single filer earning $95,000 in 2026. First, the standard deduction: $95,000 minus $16,100 leaves $78,900 of taxable income. Now the brackets fill from the bottom:

A $95,000 single filer’s 2026 tax, bracket by bracket. Only the top $28,500 is taxed at 22%.

So this filer is “in the 22% bracket” — that is the marginal rate. But the total bill is $12,070, which is 12.71% of the $95,000 gross income. That is the effective rate. Even measured against taxable income only, the average is 15.30% — still nowhere near 22%. Two true numbers, 22% and 12.71%, describing the same tax bill from different ends.

The expensive misunderstanding

Here is the mistake I correct constantly. Someone hears “22% bracket” and multiplies: 22% of $78,900 is $17,358 — and concludes that is their tax. It overstates the real bill of $12,070 by $5,288. That phantom $5,288 does real damage: it makes overtime look pointless, makes a second income look like a trap, and fuels the stubborn myth that a raise can leave you worse off. It cannot — not from brackets alone. Only the dollars above the threshold pay the higher rate; every dollar below keeps its lower rate, forever untouched by the raise.

What a raise actually costs

Give our $95,000 filer a $5,000 raise. Every new dollar lands in the 22% bracket (their taxable income rises to $83,900, still below the $105,700 ceiling of that band), so the extra tax is exactly 22% of $5,000 — $1,100 — and they keep $3,900. Their new total tax is $13,170 and their effective rate rises only slightly, to 13.17% of the new $100,000 gross. The raise was taxed at the margin, averaged into a bill that barely noticed. The same math prices a $1,000 bonus: $220 of federal tax at this filer’s margin, before payroll and state taxes.

Effective rates at real incomes

To make the gap concrete, here is the single-filer picture for 2026 across a range of salaries — same standard deduction, same brackets, nothing else assumed:

Single filers, 2026 brackets and the $16,100 standard deduction, no credits or other deductions.

Read the last two columns together. The marginal rate sprints ahead — 32% at $250,000 — while the effective rate strolls behind at 20.52%. The gap never closes, because the low-rate dollars at the bottom of the ladder are always in the average. If you remember one table from this site, make it this one: it is the antidote to most tax anxiety I encounter.

One year earlier: the quiet drift between the two rates

Run the same $95,000 salary through the 2025 tables and the pair of rates shifts slightly. The 2025 standard deduction was $16,100’s predecessor — $15,750 — leaving taxable income of $79,250, and the narrower 2025 brackets produce a tax of $12,349.00. The marginal rate is unchanged at 22%, but the effective rate is 13.00%, versus 12.71% in 2026. That is the inflation adjustment doing its work in the background: each year the brackets and the deduction creep upward, so an unchanged salary is taxed a touch more gently. It is also a practical warning — if you compare your effective rate with a friend’s, make sure you are comparing the same tax year, or you are measuring the calendar instead of each other.

Which rate, for which decision

I keep the two rates taped to different mental shelves. Marginal comes out whenever money is about to move: judging overtime, pricing freelance work, deciding how much a pre-tax retirement contribution saves (each $1,000 contributed at a 22% margin defers $220 of tax), or timing a bonus. Effective comes out when the question is about the whole year: comparing job offers in different cities, estimating next year’s total bill, or sanity-checking a withholding projection. Reaching for the wrong one is how a 22% bracket turns into a phantom 22% tax on everything — and how good opportunities get declined for arithmetic that was never real.

Sources: IRS Rev. Proc. 2025-32 (tax year 2026 brackets and standard deduction), read at irs.gov. Every figure recomputed bracket by bracket for this article and matched against the CalcFolk tax calculator. Federal income tax only; no credits assumed. This is general information, not tax advice.