The maximum federal tax rate depends on what’s being taxed. For ordinary income like wages and self-employment earnings, the top statutory rate is 37% in 2026.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 But long-term capital gains, corporate profits, payroll wages, and estates each have separate maximum rates, and several surtaxes can push the effective ceiling on some income well past 37%.
Top Rate on Ordinary Income: 37%
The 37% top marginal rate applies to wages, salaries, self-employment income, interest, short-term capital gains, and other ordinary income. The Tax Cuts and Jobs Act of 2017 originally set this rate through the end of 2025, and the One, Big, Beautiful Bill Act, signed into law on July 4, 2025, made it permanent.2Internal Revenue Service. One, Big, Beautiful Bill Provisions Without that extension, the rate would have reverted to 39.6%.
The rate is marginal. It applies only to the slice of taxable income above the top-bracket threshold, not to every dollar you earn. Six lower brackets (10%, 12%, 22%, 24%, 32%, and 35%) sit beneath it, so your effective rate on total income will always be lower than 37% even when your top dollar is taxed there.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Where the 37% Bracket Starts in 2026
Your filing status controls the threshold:1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
- Single filers: taxable income above $640,600
- Married filing jointly: taxable income above $768,700
- Head of household: taxable income above $640,600
- Married filing separately: taxable income above $384,350
These thresholds are indexed for inflation and adjusted each year. Taxable income is what remains after the standard or itemized deduction, so gross income has to be meaningfully higher than the threshold before any dollars land in the top bracket.
Top Rate on Long-Term Capital Gains: 20%
Profits on assets held longer than one year are taxed at preferential rates instead of ordinary income rates. The maximum long-term capital gains rate is 20%, and it applies only when taxable income exceeds $545,500 for single filers or $613,700 for married couples filing jointly in 2026.3Internal Revenue Service. Capital Gains and Losses Most long-term gains below those levels are taxed at 15%, and some low-income filers pay 0%.
A few asset categories carry higher ceilings. Gains from collectibles such as coins or art are taxed at up to 28%, and the same 28% cap applies to the taxable portion of qualified small business stock under Section 1202. If you sell depreciable real property and previously claimed depreciation, the “unrecaptured Section 1250 gain” portion is taxed at up to 25%.3Internal Revenue Service. Capital Gains and Losses
Surtaxes That Raise the Effective Ceiling
Two federal surtaxes sit on top of the headline rates for high earners, and they’re the reason the true maximum burden runs higher than 37% or 20%.
Net Investment Income Tax (3.8%)
The Net Investment Income Tax adds 3.8% to investment income, including capital gains, dividends, interest, rental income, and royalties. It applies when modified adjusted gross income exceeds $200,000 for single filers, $250,000 for married filing jointly, or $125,000 for married filing separately.4Internal Revenue Service. Topic No. 559, Net Investment Income Tax The tax is calculated on the lesser of net investment income or the amount by which MAGI exceeds the threshold. These thresholds are not indexed for inflation.5Office of the Law Revision Counsel. 26 U.S. Code 1411 – Imposition of Tax
For a high-income investor at the 20% capital gains rate, the NIIT pushes the effective federal ceiling on long-term gains to 23.8%. On collectibles taxed at 28%, the combined ceiling reaches 31.8%.
Additional Medicare Tax (0.9%)
The Additional Medicare Tax adds 0.9% to earned income (wages and self-employment) above $200,000 for single filers or $250,000 for married filing jointly.6Internal Revenue Service. Topic No. 560, Additional Medicare Tax It’s separate from the NIIT and applies to a different base. A high earner can owe both in the same year, one on salary and the other on investment income.
Top Payroll and Self-Employment Rates
Payroll taxes fund Social Security and Medicare, and they apply from the first dollar of wages. For 2026:
- Social Security (OASDI): 6.2% on wages up to $184,500, paid by both employee and employer, for a combined 12.4%. Earnings above $184,500 are not subject to Social Security tax.7Social Security Administration. Contribution and Benefit Base
- Medicare (HI): 1.45% on all wages with no cap, paid by both sides, for a combined 2.9%.
Self-employed people owe both halves. The combined self-employment tax is 15.3%: 12.4% Social Security on earnings up to the $184,500 base plus 2.9% Medicare on all net earnings.7Social Security Administration. Contribution and Benefit Base Once net self-employment income clears the surtax threshold, the 0.9% Additional Medicare Tax brings the top effective Medicare rate for a self-employed high earner to 3.8%.
Top Corporate Rate: 21%
C-corporations pay a flat 21% federal income tax on all taxable profits. There are no graduated corporate brackets, so a company earning $50,000 pays the same rate as one earning $50 billion. The Tax Cuts and Jobs Act cut this rate from 35% in 2017, and the One, Big, Beautiful Bill Act left it in place.
The 21% rate does not apply to S-corporations, partnerships, or sole proprietorships. Those pass-through entities don’t pay entity-level federal income tax; income flows through to the owners and is taxed at individual rates, with a possible Section 199A deduction of up to 20% of qualifying business income before those rates apply. The OBBBA made the Section 199A deduction permanent.
Top Estate, Gift, and GST Rate: 40%
The federal estate tax tops out at 40% and applies to the value of an estate above the lifetime exemption. For 2026, the One, Big, Beautiful Bill Act raised the basic exclusion amount to $15,000,000 per individual.8Internal Revenue Service. Whats New – Estate and Gift Tax Portability lets a married couple shield up to $30,000,000 by transferring any unused exemption to the surviving spouse. Only the value above the exemption is taxed, which is why the 40% rate reaches only a small number of estates.
The federal gift tax uses the same 40% top rate and shares the $15,000,000 lifetime exemption with the estate tax. Lifetime gifts reduce the exemption available at death dollar for dollar, but you can give up to $19,000 per recipient per year without touching the lifetime exemption at all.8Internal Revenue Service. Whats New – Estate and Gift Tax
Transfers to grandchildren or other recipients more than one generation below the donor can trigger a separate 40% generation-skipping transfer tax on top of any gift or estate tax. The GST tax has its own $15,000,000 exemption per person for 2026.9Congressional Research Service. The Generation-Skipping Transfer Tax (GSTT) Without planning, a large transfer to a grandchild could face both the estate tax and the GST tax, producing a combined effective rate well above 40%.
Alternative Minimum Tax: 28% Ceiling
The Alternative Minimum Tax is a parallel calculation that runs alongside the regular tax; you pay whichever is higher. Its top rate is 28%, applying to AMT income above $244,500 in 2026 ($122,250 for married filing separately). Below that, the AMT rate is 26%.
An exemption shields a base amount from the AMT calculation: $90,100 for single filers, $140,200 for married filing jointly, and $70,100 for married filing separately in 2026. The exemption phases out at 25 cents per dollar once AMT income exceeds $500,000 (single) or $1,000,000 (joint). The OBBBA made the TCJA’s expanded AMT exemption amounts permanent, keeping the AMT from reaching as many upper-middle-income taxpayers as it did before 2018.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
How the Ceilings Combine at the Top
No single rate captures the full federal ceiling for a high earner. A self-employed investor could face 37% on ordinary income, 3.8% total Medicare (2.9% base plus 0.9% surtax) on self-employment earnings, and 23.8% on long-term capital gains (20% plus the 3.8% NIIT) in the same year. State income taxes, which range from 0% to over 13% depending on where you live, sit on top of those federal numbers.
The federal system generally layers these taxes on different income streams rather than stacking them on a single base, so the maximum burden any one dollar can carry is capped by whichever category applies. For ordinary wages, that ceiling is 37% plus payroll and Medicare surtaxes. For long-term investment gains, it’s 23.8% (or 31.8% on collectibles). For estates and generation-skipping transfers, it’s 40%, potentially applied twice on the same transfer.