For 2026, the 37 percent federal income tax bracket starts at $640,600 in taxable income for single filers and heads of household, $768,700 for married couples filing jointly, $384,350 for married filing separately, and $16,000 for estates and trusts. Those are the 37% tax bracket income thresholds by filing status, published by the IRS in Revenue Procedure 2025-32.1Internal Revenue Service. Rev. Proc. 2025-32 The 37 percent rate is now a permanent part of the tax code after the One Big Beautiful Bill Act was signed on July 4, 2025, ending the scheduled snap-back to 39.6 percent.
2026 Thresholds at a Glance
The IRS sets a different entry point to the top bracket for each filing status. For 2026:1Internal Revenue Service. Rev. Proc. 2025-32
- Single filers: taxable income over $640,600
- Married filing jointly: taxable income over $768,700
- Head of household: taxable income over $640,600
- Married filing separately: taxable income over $384,350
- Estates and trusts: taxable income over $16,000
The married-filing-separately threshold is exactly half the joint figure. That is intentional, and it prevents couples from splitting income across two returns to shrink their combined tax. Head of household filers share the single filer entry point, but their lower brackets are slightly wider, so they pay less on the income below the top tier.
These numbers are up from 2025, when the single threshold was $626,350 and the joint threshold was $751,600.2Internal Revenue Service. Federal Income Tax Rates and Brackets The IRS adjusts brackets each year using the Chained Consumer Price Index so that inflation alone does not push you into a higher bracket.
Only the Income Above the Threshold Pays 37 Percent
Reaching the top bracket does not mean 37 percent of your income goes to the IRS. Each dollar fills the lowest available bracket first, and only the dollars above the threshold face the top rate.
Take a single filer with $700,000 in taxable income. The first $12,400 is taxed at 10 percent, then successive slices at 12, 22, 24, 32, and 35 percent up the ladder. Only the final $59,400 above $640,600 is taxed at 37 percent. The total federal income tax comes to roughly $214,957, an effective rate near 30.7 percent.1Internal Revenue Service. Rev. Proc. 2025-32 The closer your income sits to the threshold, the wider the gap between your marginal rate and your effective rate.
A related mistake is treating a small crossing of the line as expensive. Earning $641,000 as a single filer does not trigger a giant tax hit. Only $400 is taxed at 37 percent. The rest is taxed at the lower rates that applied before you crossed.
What Counts Toward the Threshold
The 37 percent rate applies to taxable income, not gross pay. Taxable income is what remains after subtracting the standard deduction or your itemized deductions from adjusted gross income. For 2026, the standard deduction is $16,100 for single filers and $32,200 for joint filers, so a single filer needs gross income north of about $656,700 before the top bracket starts to bite, and more if their deductions exceed the standard amount.
Ordinary income counts here: wages, salaries, bonuses, commissions, sole-proprietor profits, and interest from savings accounts or CDs. Short-term capital gains from assets held one year or less also count as ordinary income and stack on top of your wages when the brackets are applied.3Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Long-Term Gains and Qualified Dividends Sit Outside
Profits from investments held longer than a year, and qualified dividends from most domestic stocks, follow a separate rate schedule that tops out at 20 percent. For 2026, the 20 percent rate applies to single filers with taxable income above $545,500 and joint filers above $613,700. These rates never reach 37 percent no matter how much you earn, though the 3.8 percent Net Investment Income Tax discussed below raises the real ceiling to 23.8 percent.
Surtaxes That Stack on the 37 Percent Rate
The 37 percent marginal rate is not the whole federal picture. Two surtaxes ride on top of it, and neither is indexed for inflation.
Net Investment Income Tax
A 3.8 percent surtax hits investment income when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.4Internal Revenue Service. Topic No. 559, Net Investment Income Tax Investment income includes interest, dividends, rental income, capital gains, and passive business income. Anyone in the 37 percent bracket is well past those thresholds, so the surtax generally applies to all of their investment income.
Additional Medicare Tax
An extra 0.9 percent Medicare tax applies to wages and self-employment income above $200,000 (single) or $250,000 (joint).5Internal Revenue Service. Additional Medicare Tax Your employer withholds this automatically once your wages pass $200,000 in a calendar year, regardless of filing status.
Layered together, a top-bracket earner can face 37.9 percent on marginal wage income and up to 40.8 percent on marginal short-term investment gains. The surtax thresholds were set in 2013 and have never been adjusted for inflation.
Why the 37 Percent Rate Still Exists
For years, the 37 percent rate carried an expiration date. The Tax Cuts and Jobs Act of 2017 dropped the top rate from 39.6 percent to 37 percent through the end of 2025. Without action, the rate was set to return to 39.6 percent in 2026 with lower thresholds, which would have pulled more income into the top tier.
The One Big Beautiful Bill Act, signed July 4, 2025, permanently extended the 37 percent rate along with the rest of the TCJA’s individual structure. The 2026 thresholds in Revenue Procedure 2025-32 reflect that permanent extension.1Internal Revenue Service. Rev. Proc. 2025-32
A New Cap on Itemized Deductions in the Top Bracket
Permanence came with a catch. Under a new rule, itemized deductions for taxpayers in the top bracket reduce tax at a 35 percent rate rather than 37 percent. The practical hit is a 2 percentage point haircut on the value of deductions attributable to income above the 37 percent threshold. The law also created a floor for charitable contribution deductions: starting in 2026, the first 0.5 percent of your AGI in charitable gifts produces no tax benefit. For someone with $1 million in AGI, the first $5,000 in donations is effectively non-deductible.
Filing Status Choices Around the Threshold
Your filing status usually follows from your marital status on December 31 of the tax year.6Internal Revenue Service. Filing Status Where you do have a choice, the difference matters at the top.
Joint filers get the highest threshold at $768,700, which keeps most dual-income couples from paying more simply because they married. Filing separately cuts that to $384,350 per spouse, the lowest entry point to the 37 percent bracket across all statuses.1Internal Revenue Service. Rev. Proc. 2025-32 Separate filing sometimes makes sense when one spouse has large medical expenses or other AGI-linked deductions, but for most high-earning couples it produces a larger combined bill.
Head of household status is available to unmarried taxpayers who pay more than half the cost of maintaining a home for a qualifying dependent. The 37 percent entry point is the same $640,600 as for single filers, but the wider lower brackets mean less total tax on the income beneath it.
One boundary worth stating plainly: these thresholds apply to federal income tax only. State income tax operates on its own brackets and rules, and the surtaxes above ride on separate income definitions.