What are the 2027 federal tax brackets? #
The 2027 federal tax brackets are not yet official. The IRS calculates them from chained CPI (C-CPI-U) for the 12 months ending August 31, 2026 and publishes the Revenue Procedure in late October or early November 2026. As of October 18, 2026, this page projects the 2026 baselines forward by a 3.0%–3.2% band of measured C-CPI-U growth, a band that covers three ways of treating October 2025 (a month BLS did not publish); the IRS's own method and rounding could land outside it. Every projected figure is labeled as a projection — no number here should be treated as official.
- Status: projection — official Rev. Proc. expected late Oct / early Nov 2026.
- Projection band: 3.0%–3.2% applied to the 2026 baselines in Rev. Proc. 2025-32.
- Indexing statute: IRC §1(f), chained CPI (C-CPI-U), measurement window Sep 2025 – Aug 2026.
- The 2027 brackets apply to income earned in 2027 (return filed in early 2028).
- 2026 bracket floors already include OBBB's rebasing of the 10% and 12% brackets — 2027 indexes from those new baselines.
Timeline: when the real numbers arrive #
BLS published the August 2026 C-CPI-U, closing the 12-month measurement window. This page now derives its projection band from the published index; the official Revenue Procedure replaces every projection on this page.
The IRS publishes the annual inflation-adjustments Revenue Procedure (the 2026 version was Rev. Proc. 2025-32, dropped October 9, 2025). This page swaps to the official numbers the same day and the status badge flips to "Official."
Employers update payroll to the 2027 tables in January. The brackets shown here govern income earned during calendar year 2027 and reported on the return you'll file in early 2028.
2027 standard deduction #
Outside estimate: Bloomberg Tax’s 2027 Projected U.S. Tax Rates, released September 11, 2026, puts the 2027 standard deduction at $16,600 for single filers and $33,200 for married couples filing jointly, inside this page's band. It is a projection too; only the IRS Revenue Procedure sets the amounts.
Range, not prediction. The single and head-of-household rows apply the 3.0%–3.2% band to the official 2026 amount and round each endpoint to the nearest $50 for readability. Where both endpoints round to the same amount, one figure is shown. Married filing jointly and qualifying surviving spouse are twice the single figure, and married filing separately equals it, because IRC §63(c)(2) sets them that way.
| Filing status | 2026 (official) | 2027 projected range |
|---|---|---|
| Single | $16,100 | $16,600 Projection |
| Married filing jointly | $32,200 | $33,200 Projection |
| Married filing separately | $16,100 | $16,600 Projection |
| Head of household | $24,150 | $24,850–$24,900 Projection |
| Qualifying surviving spouse | $32,200 | $33,200 Projection |
The IRS uses chained CPI (C-CPI-U) for the 12 months ending August 31, 2026 to index tax parameters. That window has closed. Until the Revenue Procedure publishes, every projected dollar figure remains an estimate.
Projected 2027 brackets — Single #
Every threshold below is computed from the 2026 baseline in Rev. Proc. 2025-32 × the 3.0%–3.2% band. The official IRS release will use the statutory rounding conventions in §1(f)(7).
| Rate | 2026 threshold (official) | 2027 projected range |
|---|---|---|
| 10% | Up to $12,400 | Up to $12,750–$12,800 Projection |
| 12% | $12,400 – $50,400 | $12,750–$12,800 → $51,900–$52,000 Projection |
| 22% | $50,400 – $105,700 | $51,900–$52,000 → $108,850–$109,100 Projection |
| 24% | $105,700 – $201,775 | $108,850–$109,100 → $207,850–$208,250 Projection |
| 32% | $201,775 – $256,225 | $207,850–$208,250 → $263,900–$264,400 Projection |
| 35% | $256,225 – $640,600 | $263,900–$264,400 → $659,800–$661,100 Projection |
| 37% | Over $640,600 | Over $659,800–$661,100 Projection |
Each rate applies to taxable income over the lower figure, up to and including the upper figure (Rev. Proc. 2025-32: "Over $12,400 but not over $50,400").
Projected 2027 brackets — Married filing jointly #
Every threshold below is computed from the 2026 baseline in Rev. Proc. 2025-32 × the 3.0%–3.2% band. The official IRS release will use the statutory rounding conventions in §1(f)(7).
| Rate | 2026 threshold (official) | 2027 projected range |
|---|---|---|
| 10% | Up to $24,800 | Up to $25,550–$25,600 Projection |
| 12% | $24,800 – $100,800 | $25,550–$25,600 → $103,800–$104,050 Projection |
| 22% | $100,800 – $211,400 | $103,800–$104,050 → $217,750–$218,150 Projection |
| 24% | $211,400 – $403,550 | $217,750–$218,150 → $415,650–$416,450 Projection |
| 32% | $403,550 – $512,450 | $415,650–$416,450 → $527,800–$528,850 Projection |
| 35% | $512,450 – $768,700 | $527,800–$528,850 → $791,750–$793,300 Projection |
| 37% | Over $768,700 | Over $791,750–$793,300 Projection |
Each rate applies to taxable income over the lower figure, up to and including the upper figure (Rev. Proc. 2025-32: "Over $24,800 but not over $100,800").
The OBBB honesty line #
The 2026 bracket floors already include the One Big Beautiful Bill's extra rebasing of the 10% and 12% brackets. The 2027 figures on this page index from those new 2026 baselines — so a simple year-over-year percentage comparison to any pre-OBBB year is misleading. Compare 2027 to 2026, not to 2024.
How the indexing actually works #
Since 2018, IRC §1(f) indexes federal tax parameters using chained CPI (C-CPI-U), which grows more slowly than the older CPI-U. That slower index is why bracket creep protection is meaningfully smaller than it used to be — even when headline inflation is high.
The 2027 factor uses the ratio of average C-CPI-U for September 2025 through August 2026 versus the same 12 months a year earlier. The August 2026 reading — the final input — was published by BLS in September 2026.
Projections apply the measured growth in the chained CPI (C-CPI-U) that the IRS's 2027 inflation factor uses, the average for September 2025 through August 2026 over the average for September 2024 through August 2025, to the IRS's official 2026 baselines from Rev. Proc. 2025-32. BLS published no October 2025 value for this index, so the result depends on how that month is treated: 3.19% averaging only the published months, 3.09% comparing the same months a year earlier, and 3.06% filling the gap with the midpoint of the months on either side. This page uses the 3.0%–3.2% band that covers all three. Index values from November 2025 on are interim or initial and can still be revised, and the figures become official only when the Rev. Proc. publishes in late October or early November. Endpoints on this page are rounded to the nearest $50 for readability. The IRS rounds down instead: the law rounds each inflation increase down to a multiple of $50, or $25 for single and married-filing-separately bracket endpoints (IRC §1(f)(7) and §1(j)(3)(B)(ii); §63(c)(7)(B)(ii) for the standard deduction).
What this means for your paycheck #
Employers refresh their payroll tables to the 2027 brackets in January 2027. If your income is close to a bracket edge, a modest projected increase in the threshold can mean a slightly smaller marginal withholding — that's the bracket-creep protection the annual inflation adjustment is designed to provide. Standard-deduction increases do the same thing at the bottom of the return: more income shifts out of taxable altogether.
Retirement contribution limits (401(k), IRA, catch-ups) are indexed separately via a fall IRS Notice — see the retirement contribution calculator for those figures.
Get the 2027 tax brackets the day the IRS publishes them #
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Privacy policyFrequently asked questions #
Are the 2027 tax brackets official yet? #
The 2027 federal tax brackets have not yet been announced. The IRS calculates them using chained CPI (C-CPI-U) for the 12 months ending August 31, 2026 and publishes the official figures in a Revenue Procedure in late October or early November 2026. This page projects the 2026 baselines forward by the measured growth in that index, using a band that covers three ways of treating October 2025 (a month BLS did not publish); the IRS's own method and rounding could land outside it. No projected number here should be treated as official.
When does the IRS announce the 2027 tax brackets? #
The final C-CPI-U reading needed for the calculation, for August 2026, has now been published, and the IRS typically issues the annual inflation-adjustments Revenue Procedure in the last week of October or the first week of November 2026. That announcement covers 60+ parameters — brackets, standard deductions, the AMT exemption, the FEIE, and more.
Will the 2027 standard deduction go up? #
Almost certainly yes, unless C-CPI-U turns negative for the measurement window, which has not happened. The table below projects every filing status from the measured index growth; the exact IRS number will be set by the statutory rounding rule in IRC §63(c)(7)(B)(ii), which rounds down to a multiple of $50.
What is the 2027 standard deduction for married filing jointly? #
Not yet official. The IRS sets it in its 2027 inflation-adjustments Revenue Procedure, expected in late October or early November 2026. The law sets the joint amount at twice the single amount, so this page projects $33,200, twice its single-filer figure, up from $32,200 in 2026. Bloomberg Tax projected $33,200 in its 2027 Projected U.S. Tax Rates, released September 11, 2026.
What is the 2027 standard deduction for single filers? #
Not yet official. Applying this page's 3.0%–3.2% C-CPI-U band to the 2026 amount of $16,100 gives $16,600; the IRS figure arrives with its Revenue Procedure in late October or early November 2026. Bloomberg Tax projected $16,600 in its 2027 Projected U.S. Tax Rates, released September 11, 2026.
Do the 2027 brackets apply to my 2026 return? #
No. 2026 income is filed using the 2026 brackets already published in Rev. Proc. 2025-32. The 2027 brackets apply to income earned during calendar year 2027 and reported on the return you will file in early 2028. See the 2026 bracket page for the numbers that govern the return you are filing now.
Compare these figures with other limits in the 2027 tax numbers ledger.
Sources & References #
Disclaimer: This calculator provides estimates for educational purposes only. Not tax, legal, or financial advice. Results may vary based on your specific circumstances. Consult a qualified CPA or tax professional for personalized guidance.