Why the 2026 Tax Brackets Kept the Same Rates (and What Still Changed)

The seven federal tax rates for 2026 — 10%, 12%, 22%, 24%, 32%, 35%, and 37% — are identical to the seven rates that applied in 2025. That wasn't guaranteed. Those rates were only ever written into law through the end of 2025, and a law passed in July 2025 is the only reason they didn't reset to a higher, pre-2018 structure on January 1, 2026. What did change, as it does every year regardless of any of that, is the dollar amount at which each bracket starts.

What the 2017 Tax Law Actually Scheduled

The seven-bracket structure most people think of as "the" federal brackets — 10/12/22/24/32/35/37 — dates to the Tax Cuts and Jobs Act (TCJA), effective for tax years starting after December 31, 2017. IRS Rev. Proc. 2025-32 states this directly: the tables "were effective for taxable years beginning after December 31, 2017, and before January 1, 2026." That bounded window was the TCJA's design from the start — its individual-rate provisions were written to expire, not to run indefinitely.

The rates scheduled to take their place were higher across the board. Before the TCJA, the individual brackets ran 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%, with a top rate nearly three points above today's 37% (Tax Foundation, 2017 Federal Income Tax Brackets). Absent a new law, January 1, 2026 was the date that older schedule was set to come back.

The Law That Changed the Date

On July 4, 2025, Congress enacted Public Law 119-21 — the One, Big, Beautiful Bill Act (OBBBA). Section 70101 of that law amended IRC §1(j) "to make the tax rate tables that were effective for taxable years beginning after December 31, 2017, and before January 1, 2026, permanent" (IRS Rev. Proc. 2025-32). The scheduled reset didn't happen. The same seven rates carry into 2026 with no further expiration date attached to them.

That's the part of the tax code that stayed still. The part that moved is the one the Tax Bracket Explorer exists to show.

What Still Moves Every Year: the Dollar Thresholds

Rates are one number in the tax code; the dollar amount at which each rate starts is a separate one, adjusted on its own annual schedule. IRC §1(f)(2)(A) directs the IRS to update each bracket's boundaries "by increasing the minimum and maximum dollar amounts for each bracket ... by the cost-of-living adjustment for such calendar year" (26 U.S.C. § 1(f)). Rev. Proc. 2025-32 is the IRS's annual announcement of what that adjustment comes out to for 2026 — brackets, the standard deduction, and dozens of other indexed figures in one document.

The standard deduction shows the same pattern side by side. OBBBA set the 2025 base amounts directly in the statute — $31,500 for joint filers, $15,750 for single filers — and then those figures get the same annual cost-of-living treatment as the brackets. For 2026 they came out to $32,200 (joint) and $16,100 (single) (IRS Rev. Proc. 2025-32). One law fixed the policy; a separate, automatic mechanism moved the dollar figures.

The Mechanism: Chained CPI, Not the Inflation Number You Usually Hear

The specific inflation measure behind the adjustment is the Chained Consumer Price Index for All Urban Consumers (C-CPI-U), defined in the statute itself as "the Chained Consumer Price Index for All Urban Consumers ... as published by the Bureau of Labor Statistics" (26 U.S.C. § 1(f)(6)(A)). It isn't the same index behind the headline inflation figure most news coverage quotes. The Bureau of Labor Statistics explains the difference as a matter of formula: the chained index "reflects the effect of substitution that consumers make across item categories in response to changes in relative prices," while the standard CPI-U assumes no such substitution (BLS, Chained CPI Questions and Answers).

In practice, that formula difference has a small but fairly consistent effect. BLS's own comparison puts the typical gap at "around 0.2 percent a year," with the chained index usually — though not always — the slower-growing of the two; BLS notes "it is possible for the C-CPI-U to increase faster than the CPI-U," just uncommon (BLS, Chained CPI Questions and Answers). Bracket thresholds indexed to C-CPI-U tend to widen a bit less each year than they would under the more commonly cited CPI-U.

The 2026 Brackets in Full

Single filers

Married filing jointly

(IRS Rev. Proc. 2025-32, Tables 1 and 3.)

Use the Tax Bracket Explorer to see the full 2026 table for any filing status — including head of household and married filing separately — with the width of each bracket and the total tax owed at each ceiling shown alongside it.

Why the Threshold Adjustment Exists at All

Because the rate that applies to a given dollar depends on a fixed dollar boundary, a threshold that never moved would mean something specific: a raise that only kept pace with inflation would still push more of a taxpayer's income into a higher bracket every year, in nominal dollars, even though nothing had changed about how much that income could actually buy. The cost-of-living adjustment in §1(f) is the mechanism written to prevent exactly that — the bracket boundaries move with the same inflation measure wages are (roughly) moving with, so an inflation-only raise doesn't by itself change which bracket the next dollar lands in.

For how the bracket a dollar lands in differs from what you actually pay across your whole income, see why your effective tax rate isn't your real cost of earning.

Frequently Asked Questions

Did federal tax rates go up for 2026?

No. The seven rates — 10%, 12%, 22%, 24%, 32%, 35%, and 37% — are unchanged from 2025. The One, Big, Beautiful Bill Act made these rates permanent in July 2025, removing the scheduled expiration that had been part of the Tax Cuts and Jobs Act since 2017 (IRS Rev. Proc. 2025-32).

If the rates didn't change, why do the bracket dollar amounts look different this year?

Because rates and thresholds move on separate tracks. The rates are fixed in the statute; the dollar boundaries between them are recalculated every year for inflation under IRC §1(f), using the Chained CPI-U (26 U.S.C. § 1(f)).

What would 2026 tax rates have looked like without the OBBBA?

The TCJA's seven-bracket structure was only in effect through tax years beginning before January 1, 2026. Without a new law extending it, the brackets were set to revert to the higher, pre-2018 schedule — 10%, 15%, 25%, 28%, 33%, 35%, and 39.6% — as adjusted for 2026 (Tax Foundation, 2017 Federal Income Tax Brackets; IRS Rev. Proc. 2025-32).

Is the Chained CPI the same inflation number reported in the news?

No. Most headline inflation coverage cites the standard CPI-U. The tax code specifically uses the Chained CPI-U, a related but distinct BLS measure that accounts for consumers substituting between goods as relative prices shift, and that typically runs about 0.2 percentage points lower per year than CPI-U (BLS, Chained CPI Questions and Answers).

Does this inflation adjustment apply to anything besides the tax brackets?

Yes. Rev. Proc. 2025-32 sets more than 60 separate inflation-adjusted figures for 2026 under the same IRC §1(f) framework, including the standard deduction, the Alternative Minimum Tax exemption, and the Earned Income Credit (IRS Rev. Proc. 2025-32).

This guide is informational only and does not constitute professional tax advice. Tax rules and thresholds change annually — verify current figures against IRS sources before making decisions. Last reviewed: September 2026.

By Eric, CiteTax founder.