Marginal tax rate: what it means and how to find yours

Marginal tax rate meaning in one line

A marginal tax rate is the percentage of tax charged on the next dollar you earn. If your marginal tax rate is 22%, a $1,000 raise costs $220 in federal income tax and you keep $780 before other taxes.

It is different from your average, or effective, rate, which spreads your total tax across all your income. A single filer with $80,000 of taxable income in 2026 has a 22% marginal rate but pays about 15.4% of taxable income overall. The effective tax rate page covers the average side.

Is marginal tax rate the same as tax bracket?

For federal income tax on ordinary income, usually yes. Your bracket is the rate on the top slice of your taxable income, and that is also the rate on the next dollar. They part ways when the next dollar triggers something else, such as a credit shrinking or a surtax starting. The how tax brackets work guide shows the slice-by-slice math behind this.

How to find your marginal tax rate for 2026

1. Find your 2026 taxable income: adjusted gross income minus your standard or itemized deduction and any Schedule 1-A deductions. The taxable income line on last year's Form 1040 is a good starting estimate.
2. Pick your filing status and find the bracket that contains that figure.
3. Check whether your next dollar is also subject to payroll tax or self-employment tax.
4. Check whether you are inside a phaseout range for a credit or deduction, or above a surtax threshold.
5. Add up every rate that applies to the next dollar. That total is your true marginal rate.

For single filers in 2026, the federal income tax marginal rate is 10% up to $12,400 of taxable income, 12% up to $50,400, 22% up to $105,700, 24% up to $201,775, 32% up to $256,225, 35% up to $640,600 and 37% above. Joint and head of household thresholds are on the brackets by year page.

The table assumes a single employee with only wage income, the $16,100 standard deduction and no credits. Payroll tax drops after wages pass the 2026 Social Security wage base of $184,500, then picks up the 0.9% Additional Medicare Tax once wages exceed $200,000.

Why is my marginal tax rate higher than my bracket?

Several federal rules stack on top of the bracket rate. Each one applies only in a certain income range.

Payroll and self-employment tax

Employees pay 6.2% Social Security and 1.45% Medicare on wages, 7.65% in all, until the Social Security part stops at the wage base. Self-employed people pay 15.3% on 92.35% of net earnings, about 14.1 cents per extra dollar of profit, with half of that tax deductible. See self-employment tax rate and the 2026 wage base.

Credit phaseouts

The earned income credit shrinks as income rises past the phaseout start. For 2026, a non-joint filer with one child loses the full $4,427 credit between $23,890 and $51,593 of income, which works out to roughly 16 cents per extra dollar. With two children the loss is about 21 cents per dollar. Add the 12% bracket and 7.65% payroll tax, and a worker with one child in that range faces a marginal rate near 36%. Our EITC income limits table lists every range.

Capital gains pushed out of the 0% rate

Long-term gains are taxed at 0% only while total taxable income stays under $49,450 for a single filer in 2026. Suppose a single filer has exactly $49,450 of taxable income, including $10,000 of long-term gains. An extra $1,000 of wages is taxed at 12% ($120) and also pushes $1,000 of gains from 0% into the 15% rate ($150). That is $270 of income tax on $1,000, a 27% marginal rate while in the 12% bracket.

Surtaxes at high incomes

The 0.9% Additional Medicare Tax applies to wages and self-employment income over $200,000 for single filers ($250,000 joint). The 3.8% net investment income tax applies to investment income once modified AGI passes $200,000 single or $250,000 joint. Deductions that phase out, such as the senior deduction above $75,000 of modified AGI ($150,000 joint), also add to the marginal rate while the phaseout lasts.

The top marginal tax rate in 2026

The top federal income tax rate is 37%, starting above $640,600 of taxable income for single and head of household filers and above $768,700 for joint filers. On top of it:

• Wages: 37% plus 1.45% Medicare plus 0.9% Additional Medicare Tax, for 39.35% on the employee side.
• Interest, non-qualified dividends and short-term gains: 37% plus the 3.8% net investment income tax, for 40.8%.
• Long-term gains and qualified dividends: 20% plus 3.8%, for 23.8%. Collectibles gain can be taxed at up to 28% before the surtax.

State income tax comes on top of all of these and is not included here.

Using your marginal rate for money decisions

The marginal rate, not the effective rate, tells you what a change is worth. A few common uses:

• Pre-tax retirement contributions. A $5,000 traditional 401(k) deferral at a 22% marginal rate cuts federal income tax by $1,100. It does not reduce Social Security and Medicare tax on wages.
• Traditional vs Roth. If you expect a lower marginal rate in retirement than today, pre-tax saving usually wins; if you expect a higher one, Roth usually wins.
• Side income. A single filer in the 22% bracket who earns $10,000 of freelance profit owes about $1,413 of self-employment tax and roughly $2,045 of income tax, around 35 cents per dollar before any qualified business income deduction or state tax.
• Deductions. An itemized deduction of $1,000 is worth your marginal rate times $1,000, and only if you itemize.