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Updated August 24, 2026. Quick answer. None of the 2027 benefit and tax
figures below are officially announced yet, except one: the 2027 HSA contribution limits
($4,500 self-only, $9,000 family) were announced by the IRS on May 29, 2026, months ahead of
everything else on this list. Every other figure here is a projection, attributed to
whoever published it — never presented as this site’s own forecast — with
the actual government announcement date next to it. This page updates the day each figure
becomes official.
The reason this page is mostly projections is that 6 of its 8 figures are measured by statutory periods that have not closed. Grouped by the law that sets each one, the table above runs on five different clocks. Two figures are already settled: the RMD divisors, which are fixed by regulation and indexed to nothing (26 CFR §1.401(a)(9)-9(f)(1)), and the HSA limits, whose measuring period closed on March 31 and which the statute requires be published by June 1 of the preceding year (26 U.S.C. §223(g)(1)). Of the rest, three run on a 12-month period ending August 31 — the income tax brackets and the estate tax exemption on the C-CPI-U (26 U.S.C. §1(f)(6)(B)), the IRMAA brackets on the CPI-U (42 U.S.C. §1395r(i)(5)(A)). Two run on the calendar quarter ending September 30: the Social Security COLA (42 U.S.C. §415(i)(1)(A)(i)) and — less obviously — the 401(k) elective deferral limit, which §402(g)(4) ties to the same quarter used under 26 U.S.C. §415(d)(2)(A), not to the August window the other IRS figures use. The Medicare Part B premium is not indexed at all: it is 50 percent of the program’s actuarial rate, determined during September (42 U.S.C. §1395r(a)(3)). Shown as the statutory clock each figure runs on, not as a forecast of any figure’s value. CC BY 4.0.
Why the announcement dates matter more than the numbers
Every one of these figures is set by a specific statutory process on a specific rough
calendar — Social Security’s COLA by CPI-W (July–September average, announced by the
Social Security Administration each October 14 unless that date falls on a weekend), Medicare
Part B by the CMS Trustees Report and a November CMS notice, IRS figures by an autumn Revenue
Procedure. A number that shows up online before that date is somebody’s projection, however
confidently it’s presented — including the ones on this page, which is why every row above
says so explicitly.
Every date on this calendar is fixed by statute; none of them is an announcement date. The one 2027 figure that is already official is official because its clock stopped first: §223(g)(1) applies the 12-month period of §1(f)(4) “by substituting ‘March 31’ for ‘August 31’” and then requires the adjusted amounts in print no later than June 1 of the preceding year. Every other figure here is measured by a period that was still running on August 24, 2026 — 7 days short of the August close, 37 days short of the quarter’s. That is what makes the middle column of the table above a set of estimates rather than a set of numbers: not that the agencies are slow, but that the inputs do not exist yet. Only one publication deadline in the whole set is statutory — 42 U.S.C. §415(i)(2)(D) gives the Commissioner 45 days after the quarter closes, i.e. until November 14, 2026, to publish the COLA determination in the Federal Register. CC BY 4.0.
The one that’s already official
2027 HSA contribution limits are the exception: IRS Revenue Procedure 2026-24 (announced
2026-05-29) sets them at $4,500 for self-only coverage and $9,000 for family coverage, both up
from 2026’s $4,400/$8,750. HSA limits are announced far earlier than the others because they’re
tied to a different statutory calendar. See the HSA
2027 page for the full detail, including the unchanged $1,000 catch-up and the new HDHP
minimum-deductible figures.
Every projected figure above is attributed to the organization that published it and is explicitly not yet announced by the government body that sets it. This page will be updated with the official figure the day it is announced, and the projection will be struck through rather than deleted, so the record of what was projected vs. what actually happened stays visible. See the full current-numbers register for every figure this site tracks, dated and sourced. General information, not tax or legal advice.
This page is the site-wide picture. For the 2027 figures that depend on you — your required distribution, your HSA limit, your affordability line, your SALT cap — compute your own 2027 numbers.
