2027 federal tax brackets: projected figures and how they are set
The official numbers do not exist yet. Here is the formula, the data, and what the brackets work out to across a realistic range.
On this page
- The 2026 brackets, which are official
- How the 2027 numbers actually get set
- What the inflation data shows so far
- Projected 2027 brackets, by scenario
- What this means in dollars
- When the real numbers arrive
- The same brackets for married filing jointly
- How much the adjustment has actually moved
- What being near a threshold actually means
- What to do with a projection
- Frequently asked questions
The IRS has not published 2027 federal tax brackets yet, and nobody else has them either. They are set by a formula written into law, using inflation data that is not fully collected until the end of August 2026, and they are normally announced in October or November. Anyone showing you a definitive 2027 bracket table today is guessing.
What can be done honestly is show you the formula, the data it runs on, and what the brackets work out to across a realistic range of outcomes. That is what this page does, and it will be updated with the official figures the day they are released.
Status: 2026 brackets are official (IRS Revenue Procedure 2025-32). 2027 brackets are projections computed here from the statutory formula. Verified 4 August 2026.
The 2026 brackets, which are official
Start from solid ground. These are the real thresholds for tax year 2026, the return you file in early 2027, published by the IRS in Revenue Procedure 2025-32.
How the 2027 numbers actually get set
Bracket thresholds are indexed for inflation under 26 U.S.C. section 1(f). Three details in that statute decide everything:
- The index is C-CPI-U, the Chained Consumer Price Index for All Urban Consumers, published by the Bureau of Labor Statistics. Chained CPI runs slightly cooler than the headline CPI most people see quoted, so brackets rise a little more slowly than everyday inflation talk suggests.
- The measurement window ends 31 August. The law uses the average over the 12 months ending 31 August of the prior year. For tax year 2027, that window closes on 31 August 2026, and the final month of data is not published until mid-September.
- Increases round down to the nearest $50. Section 1(f)(7)(A) says an increase that is not a multiple of $50 is rounded to the next lowest multiple of $50. Down, not to nearest.
This is why no accurate 2027 table exists in August 2026: one of the twelve required data points has not been collected yet.
What the inflation data shows so far
The 12-month C-CPI-U change reported by BLS through the first half of 2026 has been running meaningfully above the 2.7% that drove the 2026 adjustment.
Do not read those monthly numbers as the answer. The statute uses an average across the full 12-month window, which smooths the spikes. But they do suggest the 2027 adjustment is more likely to land above the 2026 adjustment than below it, which is why the scenarios below start at 2.5%.
Projected 2027 brackets, by scenario
Each column applies that adjustment to the official 2026 threshold and rounds down to the nearest $50, per section 1(f)(7)(A).
| Rate | 2026 (official) | 2027 at 2.5% | 2027 at 3.0% | 2027 at 3.5% |
|---|---|---|---|---|
| 10% | $0 to $12,400 | $0 to $12,700 | $0 to $12,750 | $0 to $12,800 |
| 12% | $12,400 to $50,400 | $12,700 to $51,650 | $12,750 to $51,900 | $12,800 to $52,150 |
| 22% | $50,400 to $105,700 | $51,650 to $108,300 | $51,900 to $108,850 | $52,150 to $109,350 |
| 24% | $105,700 to $201,775 | $108,300 to $206,800 | $108,850 to $207,800 | $109,350 to $208,800 |
| 32% | $201,775 to $256,225 | $206,800 to $262,600 | $207,800 to $263,900 | $208,800 to $265,150 |
| 35% | $256,225 to $640,600 | $262,600 to $656,600 | $263,900 to $659,800 | $265,150 to $663,000 |
| 37% | $640,600 to and up | $656,600 to and up | $659,800 to and up | $663,000 to and up |
And the standard deduction, which matters more than the brackets for most filers because it decides how much income is taxable in the first place:
| Filing status | 2026 (official) | 2027 at 2.5% | 2027 at 3.0% | 2027 at 3.5% |
|---|---|---|---|---|
| Single | $16,100 | $16,500 | $16,550 | $16,650 |
| Married filing jointly | $32,200 | $33,000 | $33,150 | $33,300 |
| Head of household | $24,150 | $24,750 | $24,850 | $24,950 |
Method, so you can check it. Each cell is the 2026 figure multiplied by (1 + adjustment), rounded down to the nearest $50. The IRS indexes from a statutory base year rather than year over year, so an official figure may differ from these by a rounding increment.
What this means in dollars
Bracket indexing is not a tax cut. It exists to stop inflation quietly pushing you into higher brackets when your real income has not changed. If your pay rises roughly in line with inflation, indexing keeps your effective rate about flat. If your pay is frozen, indexing hands you a small cut in real terms.
For a single filer, the practical effect of a 3% adjustment is a few hundred dollars of income moving from a higher band into a lower one, plus a larger standard deduction. It is worth understanding, not worth planning around.
When the real numbers arrive
The IRS normally publishes the following year inflation adjustments in a Revenue Procedure in October or November. For tax year 2027, expect it in late 2026. Under section 1(f)(1) the Secretary must prescribe the tables by 15 December.
We will replace the projections on this page with the official figures on the day they publish, and log the change on our corrections page.
The same brackets for married filing jointly
Every threshold above is for a single filer. Married filing jointly thresholds are not simply double in the top bands, which is worth knowing if you are planning around one.
| Rate | 2026 taxable income, married filing jointly |
|---|---|
| 10% | $0 to $24,800 |
| 12% | $24,800 to $100,800 |
| 22% | $100,800 to $211,400 |
| 24% | $211,400 to $403,550 |
| 32% | $403,550 to $512,450 |
| 35% | $512,450 to $768,700 |
| 37% | $768,700 to and up |
Notice the 37% band. It starts at $768,700 jointly against $640,600 single, so it is not double. The lower bands are exactly double, and the divergence starts at the 32% threshold. This is the residue of the old marriage penalty, now confined to the top of the schedule.
How much the adjustment has actually moved
Bracket indexing is usually invisible because the numbers are large and the percentages small. Seeing several years together makes the pattern clearer.
The 2023 adjustment of about 7% was the largest in decades, and it followed the 2022 inflation spike. That is the lag built into the statute: the tax year 2023 brackets were set using data through August 2022. Whatever happens to prices this month affects your brackets over a year later.
What being near a threshold actually means
People worry about crossing a bracket line. Crossing one costs you the higher rate only on the dollars above it, which for a threshold crossing is usually a trivial amount. Take a single filer at exactly the 22% to 24% line in 2026, which sits at $105,700 of taxable income. Earning one more dollar costs 24 cents instead of 22 cents. Two cents.
What genuinely matters near a threshold is anything that is cliff-shaped rather than graduated: eligibility phase-outs for credits, income-based repayment calculations, or subsidy limits. Those can change by a large amount over a single dollar. Bracket thresholds cannot.
What to do with a projection
Very little, honestly, and that is worth saying plainly. Projected brackets are useful for two narrow purposes:
- Timing income you control. If you can choose whether a bonus, an invoice, or a Roth conversion lands in December or January, knowing roughly where next year thresholds sit is useful. Knowing them to the dollar is not, because the difference between scenarios here is a few hundred dollars of threshold.
- Setting withholding expectations. If your income is flat and brackets rise, your withholding should fall slightly. A large unexplained change in take-home pay in January usually has a different cause.
Do not file, plan a transaction, or set withholding against a projection, including this one. Wait for the Revenue Procedure. The scenarios here exist to show you the mechanism and the plausible range, not to substitute for the official figures.
Frequently asked questions
Why can nobody publish real 2027 brackets yet?
Because the law ties them to inflation data through 31 August 2026, and the final month is not released until mid-September. Any table presented as final 2027 figures before then is a projection, whether or not it is labelled as one.
Will the 2027 brackets go up or down?
Up, almost certainly. The adjustment cannot be negative in practice while prices are rising, and the 2026 C-CPI-U readings have been positive every month. The open question is the size.
Does a bigger bracket adjustment mean I pay less tax?
Only if your income does not rise by as much. Indexing moves the goalposts with prices; it does not cut rates. See how the brackets actually apply to your income.
Is chained CPI the same as the inflation rate in the news?
No. Headline inflation is usually CPI-U. Chained CPI accounts for people substituting between goods when prices change, so it typically runs a few tenths of a percent lower. Over years, that gap compounds and brackets rise more slowly than headline inflation.
Where do the official numbers get published?
In an IRS Revenue Procedure, announced through the IRS newsroom. The 2026 edition was Revenue Procedure 2025-32.
Are these the same as the tax rates changing?
No, and the difference matters. The rates (10, 12, 22, 24, 32, 35, 37) are set by legislation and change only when Congress changes them. The thresholds where each rate starts are adjusted automatically for inflation every year. This page is about the thresholds.
Why does the IRS use chained CPI instead of regular CPI?
The switch to chained CPI came from the 2017 tax legislation. Chained CPI accounts for consumers substituting between goods when relative prices change, so it typically rises more slowly than CPI-U. Applied to bracket thresholds, that means brackets creep up more slowly than headline inflation, which over many years raises effective tax rates slightly.
Do state tax brackets follow the federal ones?
No. States set their own brackets and their own indexing rules. Some index annually, some index irregularly, and several have no income tax at all. Nothing on this page applies to state tax.
Will the standard deduction rise by the same percentage?
It is indexed by the same mechanism, so it moves closely in line, subject to its own rounding. That is why the scenario table above includes it.
Written by
Teja PagidimarriTeja Pagidimarri built 43dots to answer money questions with numbers you can check. He is a software developer, not a licensed financial advisor, so every guide here is built the way an engineer would: figures pulled from the primary source, math shown in the open, and the calculators built from the actual published formulas.
Every figure on this page was checked against the primary source linked beside it. Drafting is AI-assisted; the research, the numbers, and the final edit are mine. See our editorial policy and corrections. This is general information, not personalized financial advice.
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