Key takeaways
- There is no official Social Security COLA for 2027 yet. SSA’s last locked number is 2.8% for benefits payable in January 2026. The 2027 figure is the percent change in third-quarter CPI-W (July, August, September 2026) versus third-quarter 2025 (average 317.265).
- BLS put July 2026 CPI-W at 327.104, +3.4% year over year, unchanged on the month before seasonal adjustment. If August and September froze at that index, the COLA would round to about 3.1%. They will not freeze. Advocate shops are printing 3.2% to 3.6%.
- The raise is a percent of your check, before Part B, IRMAA, and tax withholding. A 3.5% headline on a $2,071 average retired-worker benefit is about $72 a month on paper. The net can be smaller.
Social Security COLA 2027 is the search that spikes every time BLS drops a CPI print. July’s arrived Aug. 12. Forecasts got cut. That is not SSA changing the law. That is one of three months in a formula Congress wrote in the 1970s, and two months still blank.
If a site is selling you “your new check” in August, it is doing arithmetic on a guess. The agency posts the real percent after September CPI, typically mid-October. News desks are pointing at Oct. 14, 2026. Treat that as the calendar, not a promise SSA put on a blog.
The law, not the headline
Automatic COLAs started in 1975. After 1982 they hit the December benefit, which you see in the January payment. SSI for January is paid the last business day of December when the 1st is a holiday. SSA’s explainer: Latest Cost-of-Living Adjustment.
The index is CPI-W — Urban Wage Earners and Clerical Workers — from BLS, not the CPI-U you see in the first paragraph of every inflation story, and not the CPI-E experimental elderly index advocates keep asking Congress to switch to. By statute it is CPI-W. Full stop.
The percent is: (average CPI-W for July+August+September this year minus the average for the third quarter of the last year a COLA took effect) divided by that old average, times 100, rounded to the nearest tenth of a percent. No increase, or a rounded zero, means no COLA. That happened for January 2010, 2011, and 2016.
Last locked computation, for the 2.8% that started with December 2025 benefits:
- Q3 2024 average CPI-W: 308.729
- Q3 2025 average: 317.265
- (317.265 – 308.729) / 308.729 × 100 = 2.8%
That 317.265 is now the base for 2027. SSA’s own table: COLA information. The 2026 fact sheet put the estimated average retired-worker check at $2,071 after the 2.8%: 2026 COLA Fact Sheet.
The math with July in hand
BLS, July 2026 CPI release (Aug. 12): CPI-U +3.4% over 12 months. CPI-W also +3.4% over 12 months, index 327.104 (1982–84=100), unchanged on the month before seasonal adjustment. Energy in CPI-U was +14.7% over the year; food +3.0%; all items less food and energy +2.5%. Archive: Consumer Price Index — July 2026.
SSA’s actuarial page already has July 2026 CPI-W as 327.104 (updated Aug. 17). Naive one-month COLA, if August and September cloned July:
(327.104 – 317.265) / 317.265 × 100 = 3.101% ? rounds to 3.1%.
That is the floor-ish case if the next two prints go nowhere. It is not the forecast. June’s index was 327.075; July barely ticked. Energy can still shove August. Shelter is sticky. Do not average “3.4% year-over-year” and call it the COLA. Year-over-year July is not the third-quarter-over-third-quarter statute.
The 2026 Trustees Report intermediate path had a 2.7% COLA effective December 2026. July already ran hotter than that path. Trustees tables are long-run assumptions, not a monthly nowcast. SSA posts them on the same CPI-W / COLA estimates page.
Who is guessing
After July CPI, the shops that live on this beat cut their numbers:
- Committee for a Responsible Federal Budget: about 3.2%
- Mary Johnson (independent analyst CNBC cited): about 3.4%, down from 3.7% in July and 4.7% in June
- AARP: about 3.5%
- The Senior Citizens League: 3.6%, down from 3.8%
TSCL said a 3.6% on today’s average check would be about $70 a month. CBS used SSA’s $2,071 retired-worker average and 3.6% to get roughly $75. Multiply your own net, not the average. Disabled-worker and survivor averages differ. Windfall Elimination / GPO leftovers, if any still apply to your record, are a different statute.
August CPI is due Sept. 11, 2026, 8:30 a.m. ET, per BLS. September’s print is the one that closes the quarter. Then SSA does the rounding. Until then, “largest in four years” is a comparison to 2.8% / 2.5% / 3.2% — and only if the guess holds. January 2023 was 8.7%. Nobody is getting that again on this data.
Medicare eats dollars
Most people on Social Security have Part B taken out of the check. CMS usually announces the next year’s Part B premium in the same autumn window as the COLA. “Hold harmless” (Social Security Act §1839) generally stops the Part B increase from cutting the net check for people who have both deducted, except for IRMAA high-income surcharges, new enrollees, and some others. If the premium jump is smaller than the COLA dollars, you see a raise. If it is larger, hold-harmless people can see a $0 raise while the premium still rose for everyone else.
IRMAA is MAGI from two years prior. A 2025 capital-gain year can still surcharge 2027 Part B and Part D. The COLA does not care. HSA mechanics for people still on an HDHP before Medicare are a separate cap: HSA contribution limits for 2026.
Fall vaccine timing is also not the COLA. RSV for adults 75+, or 50–74 with listed risk, is a one-dose CDC rule, not an annual add-on to the January check: RSV vaccine.
CPI-W is not your cart
CPI-W’s basket is working-age urban wage earners. Retirees spend more on shelter and medical care than that basket. CPI-E exists as an experimental series. Congress has not substituted it. That is why a 3% COLA can feel like a pay cut if your rent and Part D specialty drug moved 8%. It is also why a 3% COLA can feel fat if you own the house and the grocery bill was flat.
I bonds use a different CPI (CPI-U) and a different calendar, and a HYSA is a bank rate. None of those are the Social Security statute: I bonds vs high-yield savings.
Scams spike when COLA headlines do. SSA will not call, text, or Telegram you to “confirm” a raise against a gift card. Notices go to my Social Security and, if you still get paper, the mail. The 2026 cycle put online notices in the Message Center in late November.
What else moves in January
COLA is the benefit percent. Other 2026 figures that moved with wages, not CPI-W, from the same SSA fact sheet:
- Taxable maximum (OASDI): $184,500
- Earnings test under full retirement age: $24,480 ($1 withheld per $2 over)
- Earnings test in the year you reach FRA: $65,160 ($1 per $3), then no test from the month of FRA
Those wage-indexed numbers will get new 2027 values when SSA publishes the automatic determinations with the COLA. Do not apply 3.5% to the wage base. Different formula (national average wage index).
Work the October announcement, then the CMS premium notice, then your my Social Security deposit amount in December. Until September CPI prints, every “2027 COLA is X%” card in your feed is a model. July only bought them a better guess.
Education, not a benefit estimate for your record. Official COLA is SSA’s. Official CPI is BLS. Medicare premiums are CMS. If the dollars on your deposit disagree with a headline, the deposit wins.
