Marginal vs Effective Tax Rate: The Difference
Why your bracket is not what you pay — with the current brackets and a worked example
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
Your marginal tax rate is the rate applied to your last dollar of taxable income — the bracket you are "in." Your effective tax rate is total tax divided by income — what you actually pay overall. Because brackets are graduated, the effective rate is lower unless all income sits in the lowest bracket.
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How do graduated brackets work?
Taxable income is sliced into layers. The first layer is taxed at 10 percent, the next at 12 percent, then 22, 24, 32, 35, and 37 percent — with the dollar boundaries indexed each year and set separately for single, married filing jointly, married filing separately, and head of household. Crossing into a higher bracket changes the rate on the dollars above the boundary only; every dollar below keeps its lower rate. The 2025 legislation made the current bracket structure permanent — it had been scheduled to revert to higher pre-2018 rates after 2025.
| Rate (2026) | Single — taxable income | Married filing jointly — taxable income |
|---|---|---|
| 10 percent | Up to US$12,400 | Up to US$24,800 |
| 12 percent | US$12,400 – US$50,400 | US$24,800 – US$100,800 |
| 22 percent | US$50,400 – US$105,700 | US$100,800 – US$211,400 |
| 24 percent | US$105,700 – US$201,775 | US$211,400 – US$403,550 |
| 32 percent | US$201,775 – US$256,225 | US$403,550 – US$512,450 |
| 35 percent | US$256,225 – US$640,600 | US$512,450 – US$768,700 |
| 37 percent | Over US$640,600 | Over US$768,700 |
The IRS publishes each year's boundaries in the fall before the year begins; the 2026 figures above are from Revenue Procedure 2025-32, with a 2026 standard deduction of US$16,100 (single) and US$32,200 (joint).
What is the marginal rate for?
Decisions at the margin: whether an extra deduction is worth pursuing (a US$10,000 deduction saves US$2,400 for a 24 percent bracket taxpayer, US$1,200 at 12 percent), whether a Roth or traditional retirement contribution is better (traditional wins when today's marginal rate exceeds the expected rate in retirement), whether to accelerate or defer income between years, and what a bonus or a side business's profit will actually net. The true marginal rate can differ from the bracket rate when phase-outs stack on it — the qualified business income deduction's phase-out range, the child tax credit phase-out, the Social Security benefits taxation formula — producing effective marginal rates well above the bracket within those ranges.
What is the effective rate for?
Understanding the overall burden and comparing years or taxpayers. Two versions are in common use: tax divided by taxable income (the rate on what was actually taxed), and tax divided by gross income or adjusted gross income (the rate on what was earned, which is lower still because the standard deduction and adjustments were never taxed). Neither version says anything about the next dollar; a taxpayer with a 16 percent effective rate and a 24 percent marginal rate should evaluate a deduction at 24, not 16.
Does a raise ever cost more than it pays?
Not through the brackets. A raise that pushes taxable income from US$100,000 to US$105,000 is taxed at the marginal rate on the US$5,000 only — the taxpayer keeps the majority of it. The belief that "the raise put me in a higher bracket so I took home less" is arithmetically impossible under a graduated system. Where it can happen is at a phase-out cliff: a benefit that disappears entirely at a specific income (some credits, premium subsidies, and the QBI deduction for a specified service business above the range) can cost more than the income that triggered it. Those cliffs are the reason to project taxable income before year-end, not the brackets.
Worked example
A single filer with US$95,000 of taxable income. Using the 2026 boundaries: 10 percent of US$12,400 = US$1,240; 12 percent of the next US$38,000 = US$4,560; 22 percent of the remaining US$44,600 = US$9,812. Total: US$15,612. Marginal rate: 22 percent (the bracket her last dollar landed in). Effective rate on taxable income: 16.4 percent. Effective rate on her US$111,100 of gross income (before the US$16,100 standard deduction): 14.1 percent. A US$5,000 raise would be taxed at 22 percent — US$1,100 — and she would keep US$3,900 (before payroll and state tax). A US$5,000 traditional 401(k) contribution would save the same US$1,100.
Frequently asked questions
What is a marginal tax rate?
The rate applied to the last dollar of taxable income — the bracket the taxpayer's top layer of income falls into. It is the rate that matters for decisions about additional income or deductions.
What is an effective tax rate?
Total tax divided by income (taxable, adjusted gross, or gross, depending on the version) — the overall percentage paid. It is lower than the marginal rate under graduated brackets, unless all taxable income falls in the 10 percent bracket.
What are the tax brackets this year?
Seven rates — 10, 12, 22, 24, 32, 35, and 37 percent — with dollar boundaries indexed each year and set by filing status. For 2026 the 10 percent bracket runs to US$12,400 (single) and US$24,800 (joint); the full table is above, and the IRS publishes the next year's boundaries each fall.
Does a raise ever cost more than it pays?
Not because of the brackets — only the dollars above a boundary are taxed at the higher rate. It can happen at a phase-out cliff where a credit or deduction disappears entirely at a specific income level.
Official sources
The IRS states: “When your income jumps to a higher tax bracket, you don't pay the higher rate on your entire income. You pay the higher rate only on the part that's in the new tax bracket.” — Internal Revenue Service, Federal income tax rates and brackets, https://www.irs.gov/filing/federal-income-tax-rates-and-brackets
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Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk handles year-end taxable income projections, marginal-rate analysis of deductions and retirement contributions, and phase-out cliff planning. See pricing or book a call.
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