U.S. IRS releases 2027 federal income tax brackets, with the top-rate threshold at $661,375
The U.S. Internal Revenue Service (IRS) on November 5 released the inflation-adjusted federal income tax brackets for 2027. The seven tax rates remain unchanged at 10% to 37%, and the threshold for the top-rate bracket (37%) for single filers was adjusted to taxable income above $661,375, while for joint filers it is $793,650.
According to the IRS announcement, the standard deduction for 2027 has been increased: $33,200 for married couples filing jointly (up $1,000 from 2026) and $16,600 for single filers. The maximum Child Tax Credit has been raised to $2,300. The adjustment is based on Rev. Proc. 2026-35 and applies to 2027 income and tax returns filed in 2028.
The adjustment is made using the chained Consumer Price Index (C-CPI-U), with an average increase of about 3.2%. The tax brackets themselves have not changed; only the thresholds have moved up because of inflation.
Original source:
Title: IRS releases tax inflation adjustments for tax year 2027; taxpayers continue to benefit from the Working Families Tax Cuts Publisher: Internal Revenue Service Publication date: 2026-11-05 URL: https://www.irs.gov/newsroom/irs-releases-tax-inflation-adjustments-for-tax-year-2027-taxpayers-continue-to-benefit-from-the-working-families-tax-cuts Nature of source: regulatory agency announcement Verification status: This reading of the IRS official press release and Rev. Proc. 2026-35 was confirmed, verification date 2026-11-06 Supporting content: Supports all tax bracket thresholds, standard deduction, and Child Tax Credit figures in the body
ABAB AI Insight
The IRS on November 5 released the 2027 federal income tax inflation adjustments through Rev. Proc. 2026-35. The seven tax rates (10%, 12%, 22%, 24%, 32%, 35%, 37%) remain unchanged; only the income thresholds for each bracket were adjusted. For single filers, the 37% bracket threshold rises from $640,600 in 2026 to $661,375, while for joint filers it rises from $768,700 to $793,650.
On the capital and filing side, the standard deduction is also increased: $33,200 for married filing jointly (+$1,000) and $16,600 for single filers (+$500). The maximum Child Tax Credit rises to $2,300 (with the refundable portion at $1,800). The adjustment is calculated using chained CPI (C-CPI-U), with an average increase of about 3.2%, and applies to 2027 income and tax returns filed in 2028.
Compared with the 2026 brackets, thresholds across the board move up by about 3.2%, increasing the likelihood that the same nominal income will fall into a lower tax bracket. The similarity is that the tax rates themselves do not change; the key difference is that the higher thresholds reflect inflation adjustment rather than a change in the tax-rate structure. After OBBBA was passed in July 2025, most TCJA individual provisions were made permanent, and this adjustment is made within that framework.
For taxpayers, higher thresholds can reduce bracket creep when nominal income growth keeps pace with inflation. For the IRS, the adjustment covers nearly 70 provisions, including estate and gift tax thresholds. For filing purposes, 2027 income will be subject to the new brackets when returns are filed in early 2028, and taxpayers can plan deductions and credits accordingly.
ABAB News · Cognitive Law
The seven tax rates remain unchanged at 10% to 37%, with only the thresholds increased by about 3.2% because of inflation.
The 37% bracket threshold for single filers is raised to $661,375, and for joint filers to $793,650.
The standard deduction and Child Tax Credit are increased in tandem, applying to 2027 income and 2028 filings.