The top marginal tax rate for federal income tax in 2026 is 37%, and it applies only to taxable income above $640,600 for single filers and $768,700 for married couples filing jointly.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Because the federal system is progressive, that rate never touches the dollars you earned below the threshold. Each slice of your income is taxed at its own rate, climbing through seven tiers from 10% up to 37%, and the number most people actually pay as a share of total income sits well below the top figure.
What “Marginal” Actually Means
Your marginal rate is the rate applied to your last dollar of taxable income. A common misunderstanding is that crossing into a higher bracket means all your income is suddenly taxed at that new rate. That never happens. If you’re single with $650,000 in taxable income, only the $9,400 above $640,600 is taxed at 37%. Everything below stays taxed at the lower rates that applied on the way up. A raise cannot leave you worse off after taxes.
The seven rates — 10%, 12%, 22%, 24%, 32%, 35%, and 37% — have been unchanged since the Tax Cuts and Jobs Act took effect in 2018. The One, Big, Beautiful Bill Act, signed on July 4, 2025, extended those rates beyond their original expiration. What changes each year are the income thresholds, which the IRS adjusts for inflation.
2026 Federal Income Tax Brackets
For single filers in 2026:
- 10%: up to $12,400
- 12%: $12,401 to $50,400
- 22%: $50,401 to $105,700
- 24%: $105,701 to $201,775
- 32%: $201,776 to $256,225
- 35%: $256,226 to $640,600
- 37%: over $640,600
For married couples filing jointly:
- 10%: up to $24,800
- 12%: $24,801 to $100,800
- 22%: $100,801 to $211,400
- 24%: $211,401 to $403,550
- 32%: $403,551 to $512,450
- 35%: $512,451 to $768,700
- 37%: over $768,700
Head of household filers reach 37% at the same $640,600 threshold as single filers, though their lower brackets are wider. Married filing separately hits 37% at $384,350, exactly half the joint threshold.
Marginal Rate Versus Effective Rate
Your effective rate is what you actually pay as a share of total taxable income, and in a progressive system it is always lower than your marginal rate. A single filer with $200,000 in taxable income sits in the 32% bracket, but the first $12,400 is taxed at 10%, the next slice at 12%, and so on. Total federal tax comes to roughly $38,700, an effective rate of about 19.4%. Even someone who reaches the 37% bracket typically pays an effective rate closer to 25% to 30%, because most of their income was taxed at lower rates before crossing the top threshold.2Internal Revenue Service. Federal Income Tax Rates and Brackets
Taxable Income Is Not Gross Income
Whether you actually reach the top bracket depends on taxable income, not your salary. The IRS starts with all your earnings — wages, business profits, investment gains, retirement distributions — and lets you subtract adjustments to arrive at adjusted gross income. Common adjustments include retirement account contributions, health savings account deposits, student loan interest, and self-employment tax.3Internal Revenue Service. Definition of Adjusted Gross Income
From there you subtract either the standard deduction or your itemized deductions, whichever is larger. For 2026 the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Someone earning $680,000 gross who maxes out retirement contributions and itemizes $45,000 in deductions can land below the $640,600 threshold entirely and never touch the 37% rate.
The Marriage Penalty at the Top
Most brackets double neatly for joint filers compared to singles, but the top bracket does not. Two single people each earning $640,000 stay entirely in the 35% bracket. If they marry and file jointly, their combined $1,280,000 pushes $511,300 into the 37% bracket, because the joint threshold is $768,700 rather than $1,281,200. That gap costs high-earning married couples roughly $18,900 in additional federal tax compared to filing as two singles.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Investment Income Has Its Own Top Rate
Long-term capital gains and qualified dividends do not use the ordinary income brackets. They are taxed at 0%, 15%, or 20%, and for 2026 the 20% rate begins at $545,500 for single filers and $613,700 for joint filers.4Internal Revenue Service. Topic No. 409, Capital Gains and Losses
For higher earners, 20% is not the ceiling. The Net Investment Income Tax adds another 3.8% on investment earnings, including capital gains, dividends, rental income, and interest, once modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.5Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax Those statutory thresholds are not adjusted for inflation, so more taxpayers cross them each year.6Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Combined, the top federal rate on long-term capital gains reaches 23.8%, still well below the 37% ordinary rate.
Additional Medicare Tax on Wages
High wage earners also face a 0.9% Additional Medicare Tax on earned income above the same $200,000 single and $250,000 joint thresholds. Unlike the NIIT, it applies to wages and self-employment income rather than investment returns. Employers withhold it automatically once wages pass $200,000 in a calendar year regardless of filing status, so a married taxpayer whose individual wages stay below $200,000 but whose joint income exceeds $250,000 reconciles the difference at filing.7Internal Revenue Service. Topic No. 560, Additional Medicare Tax
When the Alternative Minimum Tax Overrides the Brackets
The alternative minimum tax is a parallel calculation that can replace the regular brackets for certain high-income filers. You recalculate income by adding back deductions such as state and local taxes, some investment expenses, and incentive stock option spreads, then apply AMT rates of 26% and 28%.8Office of the Law Revision Counsel. 26 USC 55 – Alternative Minimum Tax Imposed
For 2026 the AMT exemption is $90,100 for single filers and $140,200 for joint filers, phasing out starting at $500,000 and $1,000,000 respectively by 50 cents on the dollar.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 It most commonly hits earners in the $500,000 to $1,000,000 range who live in high-tax states and exercise stock options. If your AMT figure exceeds your regular tax, you pay the AMT amount.
State Taxes Stack on Top
Federal brackets are only part of what you owe. Most states impose their own income tax, with top marginal rates ranging from zero in states with no income tax to over 13% in the steepest states. Some use a flat rate; most have graduated brackets of their own. Combined, a top earner’s total marginal rate on ordinary income can exceed 50% in the highest-tax states. State income taxes are deductible on your federal return if you itemize, but the deduction for state and local taxes is currently capped at $10,000 per return, and state tax deductions are disallowed entirely under the AMT.