On Wednesday, October 14, 2026, Social Security's cost-of-living adjustment for 2027 becomes a known number. That is an announcement, not a change to your check: the new percentage applies to December 2026 benefits, which arrive in payments beneficiaries receive in January 2027.
The trigger is a statistics release. The Bureau of Labor Statistics publishes the September 2026 Consumer Price Index at 8:30 a.m. ET that morning, according to the BLS October 2026 release schedule, and September is the last month the Social Security Administration needs before it can run the formula.
Table of Contents
- What Actually Happens on October 14
- When the Money Actually Changes
- How Big the Increase Is Likely To Be — and Why Estimates Disagree
- The Medicare Deduction That Shrinks the Headline Number
- Other Numbers Reset by the Same Machinery
- What To Do — and What Not To Bother Doing
- Frequently Asked Questions
What Actually Happens on October 14
The cost-of-living adjustment, or COLA, is the automatic annual increase that keeps Social Security benefits roughly even with consumer prices. It is not set by a vote or a policy decision. It is arithmetic, and the last input lands that Wednesday morning. The formula compares the CPI-W — the consumer price index for urban wage earners and clerical workers — across third quarters.
SSA averages July, August and September of the current year, compares that with the same quarter of the last COLA year, and rounds the result to the nearest tenth of a percent. The agency's automatic determinations page puts the 2025 base average at 317.265. Because the September figure completes the third quarter, the answer is computable the moment the release posts. SSA typically confirms the official number the same day.
When the Money Actually Changes
By statute, the adjustment is effective with December benefits. Social Security pays benefits the month after they accrue, so December's benefit is the payment that shows up in January. January 2027 is when a reader's deposit changes, not October.
For comparison, the current adjustment is 2.8 percent, effective with December 2025 benefits paid in January 2026, per SSA's latest COLA notice. Whatever is announced on October 14 replaces that figure going forward. Supplemental Security Income payments and all other Social Security benefit types move with the same percentage. No eligibility rule, retirement-age threshold or benefit formula changes this month.
How Big the Increase Is Likely To Be — and Why Estimates Disagree
Two credible sources point to meaningfully different numbers, and a reader planning a 2027 budget should know the spread. The Senior Citizens League, an advocacy group that tracks CPI-W month to month, estimated 3.5 percent in its September 11, 2026 projection, down from 3.6 percent. On an average benefit of $1,940.08, that group calculates about $67.90 more a month.
The government's own actuaries are roughly a full point lower. The intermediate projection in the 2026 Trustees Report puts the December 2026 COLA at 2.7 percent, with a range of 2.3 to 2.9 percent, according to SSA's Trustees Report assumptions. The practical reading: plan against the low end, and treat anything above 3 percent as upside rather than a budgeted figure.
The Medicare Deduction That Shrinks the Headline Number
The announced percentage is a gross figure. For most retirees, the Medicare Part B premium comes straight out of the benefit before the deposit lands, so the net raise is smaller than the headline. The 2026 Medicare Trustees Report projects the standard Part B premium rising to $209.50 from $202.90 — about $6.60 a month taken off the top.
📨 Get Free Medicare Guides Alerts
Free · No spam · Unsubscribe anytime
That projection is not the final number; the Centers for Medicare & Medicaid Services confirms the real premium in November, roughly a month after the COLA is known. Scale matters here. SSA's own estimate had the average retired-worker benefit going from $2,015 to $2,072 under the current 2.8 percent adjustment, a $57 monthly change, per SSA's figures on the effect of the COLA. A projected premium increase of that size absorbs a visible share of a typical raise.
Other Numbers Reset by the Same Machinery
The October release also drives figures that matter to people still working. These are the 2026 values; the 2027 versions follow from the same CPI and wage calculations. Anyone claiming early while still working should recheck these once the 2027 figures publish, since the exempt amounts rise with average wages rather than with the COLA itself.
- **Taxable maximum:** $184,500 in 2026 is the ceiling on wages subject to Social Security payroll tax. Earnings above it are not taxed for Social Security and do not raise a future benefit.
- **Earnings test, under full retirement age:** $24,480 exempt in 2026. Above that, SSA withholds $1 in benefits for every $2 earned.
- **Earnings test, in the year FRA is reached:** $65,160 exempt, with $1 withheld for every $3 over, and only for months before the FRA month.
- **After full retirement age:** no earnings test at all.
What To Do — and What Not To Bother Doing
Nothing is required of beneficiaries on October 14. SSA posts personalized COLA notices to my Social Security accounts and mails them in December, and that notice — not a news estimate — is the number to budget from. A short, useful sequence: Anyone who receives a call, text or email demanding action, payment or personal data to "claim" the new COLA should disregard it — the increase applies automatically, and SSA communicates it by account notice and mail.
- Read the announced percentage on October 14, then wait for the CMS Part B premium in November before recalculating monthly income.
- Check that your my Social Security account login works now, so the December notice is readable online.
- If you are working and under full retirement age, note the new earnings-test threshold when it publishes and compare it with your expected 2027 wages.
- Treat the gap between 2.7 and 3.5 percent as real uncertainty until the morning of the release.
Frequently Asked Questions
Will my October or November 2026 payment be larger?
No. The adjustment takes effect with December 2026 benefits, which are received in January 2027.
Does the COLA apply to SSI as well as retirement benefits?
Yes. The same percentage covers all Social Security beneficiaries and SSI recipients.
Why do news estimates differ from the government's projection?
They use different methods. The Senior Citizens League tracks monthly CPI-W readings, while SSA's actuaries build a long-range economic forecast; the 2026 Trustees Report's 2.7 percent intermediate figure sits about a point below the advocacy estimate.
Where will I see my exact new benefit amount?
In your personalized COLA notice, posted to my Social Security and mailed in December.
You Might Also Like
- When Will Social Security Announce the 2027 COLA Rate?
- How a Bigger COLA Could Raise Your Retirement Taxes
- Investment Retirement Planning FAQ for October 2026: Source-Checked Answers to Common Questions