New U.S. inflation data are shifting expectations for next year’s Social Security cost-of-living adjustment, with forecasts for the 2027 COLA moving lower than earlier projections. The change comes as inflation has eased slightly during the summer months, putting pressure on models that had assumed a 3.9% adjustment for 2027.
Key takeaways
- Price move: The article does not report a market price move; the update affects expected Social Security benefits via the projected 2027 COLA.
- Catalyst: Government inflation releases indicating slower inflation during the summer months have led to revised, lower COLA expectations.
- Key implication: The eventual COLA remains uncertain because it depends on specific inflation readings through the period ending in September, finalized in mid-October.
- Range of outcomes: Forecasts from different groups vary, with projections for 2027 landing between 3.2% and 3.6% in the latest estimates cited.
What’s changing in 2027 COLA forecasts
For weeks, the market narrative around Social Security benefits has centered on a projected 3.9% COLA for 2027. That figure is now facing headwinds as newly reported inflation trends suggest the adjustment could come in below that level.
Although there is broad agreement that the 2027 COLA is likely to be higher than the 2.8% increase expected for 2026, current estimates diverge on where the 2027 figure will land. According to projections referenced in the report:
- AARP forecasts a 2027 COLA of 3.5%.
- The Senior Citizens League (TSCL) predicts 3.6%.
- Committee for a Responsible Federal Budget (CRFB) estimates a lower outcome of 3.2%.
CRFB said that higher COLAs can support seniors in the near term, but also raise costs for the retirement program at a time when the Social Security trust funds are projected to face insolvency issues within the next six years, according to the report.
How the COLA is calculated—and why predictions can swing
Under the current legal framework, the annual Social Security COLA is calculated using Bureau of Labor Statistics inflation data from July, August, and September. The CPI-W measure—Consumer Price Index for Urban Wage Earners and Clerical Workers—is the specific index used to determine the adjustment.
The choice of CPI-W has drawn long-standing criticism from senior advocacy groups. According to the report, groups such as TSCL and AARP have argued that the government should instead use CPI-E, the Consumer Price Index for the Elderly, which they say would better reflect the spending patterns of seniors. The report notes that switching to CPI-E would require congressional action.
The report also points to a recently reintroduced proposal tied to the COLA methodology. The proposal would require the government to use whichever calculation produces a larger increase. While the proposal has not become law and would not change 2027 benefits by itself, the report suggests a change to the approach could still be on the policy horizon.
What to watch next for seniors and investors
COLA predictions should be treated as provisional. Inflation can move quickly, and there is still time before the final percentage is determined. As the report notes, the Social Security COLA for a given year is not effectively knowable until the final figure is announced in mid-October based on the completed July–September data set.
For retirees and households planning around Social Security income, the key near-term variable is the trajectory of inflation through the months that feed into the CPI-W calculation. For policymakers and market watchers tracking the broader fiscal outlook, the debate over which CPI measure to use—and whether changes could increase benefit growth—remains central to assessing both short-term purchasing-power effects and longer-term program sustainability.
