Social Security’s annual cost-of-living raise for 2027 is not official yet, but the forecasts circulating now point to the largest increase since 2023 — and the exact figure will depend on inflation data that isn’t fully in yet.
What the early estimates say
As of late July 2026, three trackers are putting the 2027 COLA somewhere between 3.6% and 3.8%:
- The Senior Citizens League (advocacy group): 3.8%, unchanged for three months running
- AARP: 3.6%, based on its analysis after the June inflation report
- Mary Johnson (independent analyst): 3.7%, as of mid-July
None of these is the government’s final word — and they’ve moved before. Johnson’s own estimate was 4.7% just a month earlier, a full point higher than where she landed in July, as new inflation data reshaped the math.
That word won’t come until October. The Social Security Administration has said it will announce the 2027 cost-of-living adjustment, or COLA, in October 2026, once it has the inflation data it’s legally required to use.
Why the wait matters
The COLA isn’t set by guesswork or by any single month’s inflation report. By law, it’s calculated from a specific measure of inflation called the CPI-W — the Consumer Price Index for Urban Wage Earners and Clerical Workers. The Social Security Administration compares the average CPI-W for July, August and September of this year against the same three months from the year before, and rounds the result to the nearest tenth of a percentage point.
That means the raise can’t be locked in until all three months of data are out. The Bureau of Labor Statistics has scheduled the July 2026 report for August 12, the August report for September 11, and the September report for October 14, 2026 — the release that will finally complete the picture and let the Social Security Administration do its math.
June’s inflation numbers, already out, showed the CPI-W up 3.5% over the prior year. That’s one reason current 2027 forecasts are lower than some earlier readings, including Johnson’s 4.7% estimate just a month before her mid-July projection. But June isn’t part of the official calculation — it’s just the most recent clue analysts have to work with.
How this stacks up against recent years
If a 3.6% to 3.8% raise holds up in October, it would be the largest COLA since 2023 — a real jump from recent years. The 2026 adjustment, which raised checks starting with January 2026 payments, was 2.8%. The 2025 COLA was 2.5%.
For an average retirement benefit, a 3.8% raise would add somewhere in the neighborhood of $74 to $79 a month. The exact number depends on which starting benefit a source uses: The Senior Citizens League’s calculation starts from about $1,938, while other estimates use starting benefits as high as $2,085. None of these figures will be final until the government sets the actual percentage.
Medicare costs and the program’s finances
Here’s the catch: Medicare premiums are typically deducted directly from Social Security checks, and they’re expected to rise for 2027. That could offset some of whatever COLA retirees receive, though the exact 2027 Medicare premium hasn’t been set by federal regulators yet, so how much of a bite it takes is still unknown.
Separately, the Committee for a Responsible Federal Budget, a nonpartisan group that analyzes federal spending, estimated in May 2026 that a 3.8% COLA would add roughly $300 billion to Social Security’s shortfall over the next decade and move up the trust fund’s depletion date by about three months. That fund is already projected to run low on reserves sometime in the early 2030s if Congress doesn’t act — a timeline set well before this year’s COLA debate. A bigger raise for retirees comes with a modest cost to the program’s finances, one that Congress, not the COLA formula, would decide whether to address.
A separate fight over how the raise is calculated
Rep. John Larson, a Connecticut Democrat, reintroduced a bill in July 2026 that would raise benefits by 2%, create a new minimum benefit tied to the poverty line, and switch the COLA formula itself from the CPI-W to a different index, the CPI-E, which is designed to track the spending patterns of older Americans more closely. Advocates for the change, including Senior Citizens League executive director Shannon Benton, argue that even a 3.8% COLA wouldn’t fully close the gap between benefit increases and what seniors actually spend on things like health care and housing. The bill has not passed, and there’s no confirmation yet that it will.
What to watch for
There’s nothing for beneficiaries to file or apply for — the COLA is automatic and applies to everyone receiving Social Security or Supplemental Security Income. The only real step is patience: the Social Security Administration typically makes its announcement in mid-October, based on the September CPI report due out October 14, 2026. Once that’s official, it will appear on the Social Security Administration’s website, and the new amount will show up in benefit statements before taking effect with January 2027 payments.