The Social Security Administration announces the 2027 cost-of-living adjustment on 14 October 2026, at around 8:30am ET.
Two things about that are worth knowing before the day, and neither usually makes the headline.
The number is already mostly determined
The COLA is not a decision. It is an arithmetic output. The formula compares the average CPI-W across July, August and September with the average for those same three months a year earlier.
July and August data are already published. Only September remains outstanding — which is why estimates have narrowed to a band of roughly 3.2% to 3.6%, with the Senior Citizens League putting it at 3.6%.
Nobody at the SSA sets this figure, and no announcement changes it. The 14 October event is the publication of a calculation, not a choice.
Why the COLA so often feels wrong to the people receiving it. The index used is CPI-W — the Consumer Price Index for Urban Wage Earners and Clerical Workers. Read that again: it measures the spending patterns of working-age employed people. Their basket is weighted toward commuting, work clothing and the things a household with a job buys. A retired household spends far more of its income on healthcare and housing and far less on getting to work. So the adjustment tracks an inflation rate that is not the one most recipients actually experience. This is a longstanding and well-documented criticism, and it explains the annual gap between the announced percentage and how the increase feels.
What actually lands in your account
The headline percentage is not the change to your payment, because the Medicare Part B premium is deducted directly from most Social Security payments before they arrive.
| Announced COLA | The gross percentage increase |
| Minus | Any rise in the Medicare Part B premium |
| Equals | What your deposit actually changes by |
In years where Part B has risen sharply, that deduction has absorbed a substantial share of the increase. The Part B figure for the following year is announced separately, so the two numbers have to be put together before anyone knows what their payment will be.
This is the single most common source of the January complaint that “the raise never showed up”. It did — and then part of it left again through a different door.
The dates that matter
| Mid-October | September CPI-W published, completing the formula |
| 14 October 2026 | COLA announced, around 8:30am ET |
| Later in the autumn | Medicare Part B premium for 2027 announced |
| December | SSA notices sent showing individual 2027 payment amounts |
| January 2027 | Increase appears in payments |
What to do with an estimate before then
Treat 3.2% to 3.6% as a planning range rather than a figure. September inflation data can move it, and the Part B premium can change what it means afterwards.
The document that actually tells you your number is the notice the SSA sends in December, which states the specific amount you will receive. Everything before that — including this page — is arithmetic in progress.
The Social Security Administration is scheduled to announce the 2027 cost-of-living adjustment on 14 October 2026, reported as expected at approximately 8:30am ET. The COLA is calculated from the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), comparing the average for July, August and September against the same three months of the previous year, with the resulting increase applied to payments from January 2027. Estimates reported in August 2026 ranged from approximately 3.2% to 3.6%, including a projection of 3.6% from the Senior Citizens League. Figures were reported by NewsNation, Yahoo Finance, AARP and the Senior Citizens League. Medicare Part B premiums are deducted from most Social Security payments and are announced separately; the 2027 premium had not been announced at the time of writing. The observation that CPI-W reflects the spending of working-age wage earners rather than retirees is a longstanding and widely documented criticism of the methodology. This article is general information and not financial advice; ssa.gov and the annual notice sent to beneficiaries are authoritative for individual payment amounts.
Frequently Asked Questions (FAQ)
When is the 2027 COLA announced?
14 October 2026, with the announcement expected at 8:30am ET from the Social Security Administration.
How is the COLA calculated?
From the Consumer Price Index for Urban Wage Earners and Clerical Workers, known as CPI-W. The average across July, August and September is compared with the average for the same three months a year earlier, and the percentage difference is the adjustment.
What are the current estimates?
Around 3.2% to 3.6%. The Senior Citizens League has estimated 3.6%. These are projections until the September data is published.
When does the increase reach my payment?
Payments from January 2027.
Why does the COLA never seem to match my costs?
Because CPI-W measures the spending of urban wage earners and clerical workers — a working-age population. Older households spend a larger share on healthcare and housing and a smaller share on things like transport to work, so the index that sets the adjustment does not track a retiree’s actual basket.
Does the whole increase reach me?
Not necessarily. The Medicare Part B premium is deducted directly from most Social Security payments, so if that premium rises, part of the COLA is absorbed before the payment arrives. In some years the increase in Part B has consumed a large share of the raise.
