Every October the IRS publishes the following year’s tax brackets, standard deduction and about sixty other inflation-adjusted figures. Last year it landed on October 9. This year, as of this writing, it has not come out yet.
So let us be precise about what this page is. Every 2027 number below is a projection — calculated by tax analysts from inflation data that is already public, not announced by anyone. The projections are usually very close, because the formula is fixed in law and the inputs are known. They are still not official, and we will replace them the moment the IRS publishes the real Revenue Procedure.
What this page can tell you with confidence is how the figures are produced, roughly where they will land, and — the part that actually matters for most households — what a bracket change does and does not do to your tax bill.
The short version
- The IRS has not published the 2027 figures yet. They normally arrive in October or early November
- The inflation adjustment is projected at about 3.2%, with estimates clustering between 3.2% and 3.3%
- Standard deduction, projected: about $16,600 single, about $33,200 married filing jointly, about $24,950 head of household
- The 10% bracket is projected to top out near $12,800 single and $25,600 joint
- The 37% rate is projected to begin above roughly $661,375 single and $793,650 joint
- These apply to the 2027 tax year — the return you file in early 2028, not the one you file next spring
There is a slide-by-slide version in our 2027 tax brackets web story.
Where these numbers come from
This is not guesswork dressed up as analysis. The adjustment is a formula written into the tax code, and the inputs are published by the Bureau of Labor Statistics before the IRS says a word.
Since 2018, the brackets have been indexed to the chained Consumer Price Index — C-CPI-U — measured over the twelve months ending in August. Once the August figure is published in September, anyone who can read the statute can calculate the adjustment. That is why independent projections tend to agree with each other, and with the eventual IRS release, to within a few dollars per threshold.
The word “chained” is doing quiet work there. A chained index assumes people substitute when prices rise — buying chicken when beef gets expensive — so it runs slightly below the headline CPI. Over one year the difference is small. Over a couple of decades it compounds, and brackets rise a little more slowly than prices actually do. This is one of the quieter ways tax burdens drift upward without anyone voting for it, and it is worth knowing about even though nothing on your return is labelled “chained CPI”.
It is also why the tax adjustment (about 3.2%) differs from the Social Security COLA for 2027 (3.6%). They use different indexes over different periods. Neither is wrong; they are measuring different things.
What is projected to change
| Figure | 2027 (projected) | Notes |
|---|---|---|
| Standard deduction, single | about $16,600 | Some projections put it nearer $16,550 |
| Standard deduction, married filing jointly | about $33,200 | Some projections put it nearer $33,050 |
| Standard deduction, head of household | about $24,950 | |
| Top of the 10% bracket, single | about $12,800 | Taxable income, after deductions |
| Top of the 10% bracket, joint | about $25,600 | |
| 37% rate begins, single | above about $661,375 | |
| 37% rate begins, joint | above about $793,650 |
Every figure in this table is a projection. The IRS has not published official 2027 amounts. Note the disagreement on the standard deduction — different analysts round the chained-CPI calculation slightly differently, which is exactly why these are estimates and not facts.
We have deliberately not published a full seven-row bracket table of projected thresholds. The projections we can source cover the bottom and top of the range; filling in the middle rows with numbers nobody has published would make this page look more authoritative than it has any right to be. When the IRS releases the real figures, the complete table goes here.
The thing most people get wrong about brackets
This is the most valuable paragraph on the page, and it has nothing to do with 2027 specifically.
Moving into a higher bracket does not tax all of your income at the higher rate. It taxes the portion above that threshold, and only that portion. People turn down raises over this misunderstanding, and it costs them real money.
A worked example: Marcus, single filer
Marcus has $60,000 of taxable income and is offered a raise that takes him to $64,000. He has heard that $64,000 puts him in a higher bracket and worries the raise will leave him worse off.
It cannot. Suppose the extra $4,000 does cross into a bracket taxed at 22%. Then that $4,000 is taxed at 22%, costing him $880, and he keeps $3,120. Every dollar below the threshold is taxed exactly as it was before — the first slice at 10%, the next at 12%, and so on. His tax on the original $60,000 does not change at all.
The rate on your last dollar is your marginal rate. The share of your total income that actually goes in tax — always lower — is your effective rate. Marcus might sit in the 22% bracket while paying an effective rate nearer 13%. A pay rise has never, under this system, left anyone with less take-home pay.
The genuine exceptions are not about brackets at all. They are cliff effects in benefit programmes and subsidies, where crossing an income line can cost you an entitlement outright. Those are real and worth checking if you are near one. The brackets themselves are not a cliff.
How to estimate your own 2027 position
You can do this on the back of an envelope, and it will be close enough for planning.
- Take your 2026 taxable income — the figure after your standard deduction, not your gross salary.
- Multiply the bracket thresholds you care about by 1.032. That is the projected adjustment.
- Compare. If your income rises by less than about 3.2% next year, you will, in real terms, be slightly better off: the brackets moved further than your pay did.
- Check your withholding if anything significant changed — a new job, a spouse’s income, a side business, a large one-off gain.
That third point is the practical heart of indexation. It exists to stop inflation quietly raising your tax bill when your purchasing power has not improved — “bracket creep”. Because the brackets use chained CPI, the protection is good but not complete.
What this does not cover
Inflation adjustments move thresholds. They do not change tax law, and they do not change rates. The seven rates — 10, 12, 22, 24, 32, 35 and 37 percent — are set by legislation, not by the IRS, and only Congress can alter them.
Other figures adjust on their own schedules: the Social Security wage base, retirement contribution limits for 401(k) and IRA accounts, the gift tax exclusion, Health Savings Account limits and the Earned Income Tax Credit. Several of those are announced separately and at different times, so a quiet October on brackets does not mean nothing else is moving.
And none of this affects the return you file in spring 2027. That one uses the 2026 figures, which are already final. If you are still dealing with that year, our guide to the October 15 tax extension deadline covers what happens when a return is late.
When the real numbers arrive
The IRS publishes the figures in an annual Revenue Procedure — a plain document with every adjusted amount in it. It normally appears in October or early November, and the official source is always irs.gov, not a summary.
A word of caution on timing. The gap between projections circulating and the IRS confirming them is the window in which bad information spreads fastest, because confident-looking tables are everywhere and none of them are official. If you see a site presenting 2027 brackets as settled fact today, it is presenting a projection without saying so.
We will update this page with the official figures and a complete bracket table as soon as they are published.
Three moves worth making before January
1. Max what you can before December 31. Retirement contributions reduce taxable income for the year they are made. A 401(k) contribution has to land by the end of the calendar year; an IRA contribution for 2026 can be made right up to the April filing deadline. If you are close to a threshold that matters to you, this is the lever with the shortest handle.
2. Look at your withholding now, not in April. The IRS Tax Withholding Estimator at irs.gov takes about ten minutes with a payslip in front of you. People who owed money last April and did nothing about it will owe again, with the same surprise. People sitting on a very large refund are lending the government money at zero interest for a year.
3. Keep the paperwork for anything unusual. A house sale, a large brokerage gain, a crypto disposal, a first year of self-employment, a pension drawdown — these are the things that produce unexpected bills, and they are far easier to handle with the documents filed in October than reconstructed in April.
None of that depends on knowing the exact 2027 thresholds, which is rather the point. The brackets move by roughly three percent and almost nobody changes their behaviour because of it. The decisions above are worth considerably more than the difference between a $16,550 and a $16,600 standard deduction.
Your state does not follow these brackets
One thing worth saying plainly, because it causes real confusion: everything on this page is federal. State income tax is a separate system with its own rates, its own brackets and its own inflation rules — or none at all.
Some states index their brackets to inflation annually, as the federal system does. Others fix them in statute and leave them unchanged for years, which quietly increases the real tax burden every year without a vote. Several states have a single flat rate, and a handful levy no income tax on wages at all.
The practical consequence is that your total marginal rate is the federal rate plus your state rate, and a change in the federal brackets tells you nothing about what your state is doing. If you are planning around a threshold — a Roth conversion, a large capital gain, the timing of a bonus — check your state’s own figures separately. Your state revenue department publishes them, usually later in the year than the IRS.
Frequently asked questions
Has the IRS announced the 2027 tax brackets?
Not yet, as of this writing. The IRS normally publishes the following year’s inflation adjustments in October or early November. Last year the release came on October 9.
What is the projected 2027 inflation adjustment?
Independent projections cluster around 3.2%, with estimates in the 3.2% to 3.3% range. The adjustment uses the chained CPI over the twelve months ending in August.
What is the 2027 standard deduction?
It is projected at about $16,600 for single filers and about $33,200 for married couples filing jointly, with head of household near $24,950. These are projections, not official figures.
Will I pay more tax if I move into a higher bracket?
Only on the income above that threshold. Every dollar below it is taxed at the same rates as before, so a pay rise always leaves you with more take-home pay.
Why is the tax adjustment different from the Social Security COLA?
They use different inflation measures over different periods. Tax brackets use the chained CPI to August; the Social Security COLA uses CPI-W over the third quarter.
Do the 2027 brackets affect the return I file next spring?
No. The return you file in spring 2027 uses the 2026 figures, which are already final. The 2027 brackets apply to the return you file in early 2028.
Where should I check the official figures?
Only irs.gov. The IRS publishes them in an annual Revenue Procedure listing every adjusted amount. Anything else is a summary of that document, or a projection.
