- Tax publishers project the 37% bracket starts above $661,375 for single filers in 2027.
- Married couples filing jointly would enter the top bracket above $793,650 under the estimate.
- The figures reflect a 3.2% inflation adjustment, but the IRS has not released final thresholds.
Tax publishers project that the 2027 federal bracket charging 37% will begin at taxable income above $661,375 for single filers and above $793,650 for married couples filing jointly.
The figures are estimates, not final IRS-issued numbers. They reflect a projected 3.2% inflation adjustment for 2027, based on calculations released by tax publishers.
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The filing status changes the entry point. Married taxpayers filing separately reach the projected bracket above $396,825, while heads of household reach it above $661,350.
These amounts apply to taxable income. They do not describe a taxpayer’s total salary or gross earnings.
The 37% tax rate also does not apply to every dollar earned. Only the portion above the applicable threshold enters that bracket; income below it remains subject to the lower rates.
The federal schedule retains seven rates: 10%, 12%, 22%, 24%, 32%, 35%, and 37%.
The projected top-bracket thresholds vary by filing status
The early estimates answer a narrower question than how much someone can earn overall. They identify the taxable-income level where the top marginal bracket begins for each filing category.
A taxpayer’s filing status therefore determines which projected threshold applies. The four figures are:
| Filing status | Projected taxable income entering the 37% bracket |
|---|---|
| Single | Over $661,375 |
| Married filing jointly | Over $793,650 |
| Married filing separately | Over $396,825 |
| Head of household | Over $661,350 |
The word “over” is central. Reaching a threshold does not place all taxable income into the 37% bracket. The higher rate applies only to the amount above the listed figure.
Tax publishers used inflation data for early planning estimates
Bloomberg Tax & Accounting published its 2027 Projected U.S. Tax Rates report on September 11, 2026. The report used a projected 3.2% inflation adjustment for the coming tax year.
Thomson Reuters Checkpoint also published projected 2027 figures on September 11, 2026. Its report showed the same top-bracket thresholds for single filers and married couples filing jointly.
Kelly Phillips Erb’s September 12, 2026 analysis gave the same projected figures across the four filing statuses. The estimates are based on inflation indexing and are intended for planning before the government releases its final schedule.
The seven-rate structure remains unchanged in the projection: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The inflation adjustment changes the dollar thresholds, not the number of rates.
Taxpayers planning for tax year 2027 should therefore use the amounts as preliminary benchmarks. The final IRS announcement will determine the official thresholds.
