Social Security beneficiaries are waiting for the annual cost-of-living adjustment (COLA), which determines how benefits will change in response to inflation. The 2027 COLA has not yet been officially announced, but an estimate from The Senior Citizens League points to a potentially higher increase than the adjustments applied in recent years.
The estimate is only a projection at this stage. The final COLA will depend on inflation data through September, which is used in the statutory calculation.
Announcement
The 2027 Social Security COLA is expected to be announced in October after the Bureau of Labor Statistics (BLS) releases the September Consumer Price Index data.
The COLA calculation uses the Consumer Price Index for Urban Wage Earners and Clerical Workers, known as the CPI-W. Specifically, the Social Security Administration uses the average CPI-W for July, August and September and compares that figure with the average for the same three months of the previous year.
September’s CPI-W is therefore the final monthly inflation reading needed for the calculation.
For official information about the calculation, the Social Security Administration explains how COLA is determined.
Estimate
The Senior Citizens League, an organization that advocates for older Americans, has estimated that the 2027 Social Security COLA could be 3.5%.
That figure is not the official adjustment. It can change as additional inflation data becomes available.
The 3.5% projection is 0.1 percentage point lower than the organization’s previous estimate. Even so, it would be higher than the 2.8% COLA applied to Social Security benefits in 2026 and the 2.5% adjustment applied in 2025.
Because the final calculation depends on the CPI-W figures for the third quarter, beneficiaries should treat current estimates as planning information rather than a confirmed increase.
Benefits
A 3.5% COLA would increase each beneficiary’s payment by 3.5% before considering other changes that could affect the amount of a monthly check.
For example, using a monthly benefit of $1,940:
| Current Monthly Benefit | 3.5% Increase | Approx. New Benefit |
|---|---|---|
| $1,940 | $67.90 | $2,007.90 |
This is an illustration rather than a prediction of an individual’s actual payment. Social Security benefits vary from person to person, so the dollar increase would depend on the beneficiary’s existing benefit amount.
For example, someone receiving $1,500 per month would see a different increase from someone receiving $2,500.
History
A potential 3.5% COLA can also be put into historical context.
Social Security’s annual COLAs have varied substantially over the decades. Some adjustments have been relatively modest, while periods of high inflation have produced much larger increases.
The largest annual COLA was 14.3% in 1980. The adjustment was 11.2% in 1981 and 9.9% in 1979.
More recently, the COLA was 2.5% for 2025 and 2.8% for 2026.
The following table shows the recent figures alongside the current 2027 estimate:
| Year | COLA |
|---|---|
| 2025 | 2.5% |
| 2026 | 2.8% |
| 2027 | 3.5% estimate |
The 2027 figure in the table is an estimate from The Senior Citizens League, not an official SSA announcement.
The Bureau of Labor Statistics CPI data is the underlying inflation information used in the COLA process.
Calculation
The COLA is designed to account for changes in consumer prices rather than being set at a fixed percentage each year.
Under the statutory formula, the SSA compares the average CPI-W for July, August and September with the corresponding average from the previous year. If the resulting increase is positive, the adjustment is applied to Social Security benefits.
This means forecasts can change before the official announcement. A projection made before all three months of relevant inflation data are available is necessarily incomplete.
It is also worth noting that the COLA applies to benefits, but a beneficiary’s actual change in take-home income can be affected by other factors. Medicare premiums, tax withholding and other deductions can influence the amount that reaches a person’s bank account.
Outlook
The most important date for beneficiaries is the official announcement, rather than any preliminary forecast.
Until the September CPI-W data is available and the Social Security Administration completes its calculation, the 3.5% figure should be viewed as an estimate. The final adjustment could be different.
If the eventual COLA were 3.5%, a $1,940 monthly benefit would increase by about $67.90 to approximately $2,007.90, before other adjustments or deductions.
For now, beneficiaries can use current estimates to understand the possible range of next year’s payments, but the official COLA will provide the figure used to determine the 2027 benefit increase.
