By David Enna, Tipswatch.com
The recent release of the June 2024 inflation report created a baseline number for next year’s cost of living adjustment for Social Security recipients. It’s all based on a needlessly complex formula the Social Security Administration uses to set the COLA each year.
- The index. The SSA does not use the standard measure of inflation that you see reported each month. Instead it uses CPI-W, the Consumer Price Index for Urban Wage Earners and Clerical Workers, which often runs slightly lower than the standard CPI-U.
- The time period. Instead of using an annual rate of inflation, the SSA looks at only the average of three months, July to September, and compares that to the average from a year earlier. Last year, for example, the three-month average was 301.236, an increase of 3.2% over the average for 2023. So the 2024 COLA was set at 3.2%, even though annual U.S. inflation was running at 3.7%.
- The summer months. Inflation can be notoriously volatile in the months of July to September. We could easily see a month of high-ish inflation, or an another month of deflation, as we saw in June. That means any Social Security COLA projection — including mine — is just an educated guess.
For June, the BLS set the CPI-W index at 308.054, an increase of 2.9% over the last year. So does that mean the Social Security COLA will end up being 2.9%? No, because only the next three months — July to September — matter in this equation.
In this chart, I have provided four potential monthly inflation scenarios for the July to September period — 0.0% per month to 0.3% per month — and then calculated the effect on the eventual Social Security COLA.
Most likely, none of these scenarios will end up being accurate. Anything can happen, including a bout of deflation. But I think the scenario with the highest probability is inflation averaging 0.2% a month over the three months, resulting in a Social Security COLA of 2.7%.
So my projection is 2.7%. That is a drop from 2024’s increase of 3.2% and is below the current rate of U.S. inflation, at 3.0% for the year ending in June.
As of May 2024, the average Social Security benefit check was $1,778.24, according to the SSA. An increase of 2.7% would raise the average to $1,826.25.
What others are saying
I wrote everything above before looking at any other projections for the Social Security COLA. In my experience, many of these forecasts are wildly off base.
One group I trust is the Senior Citizens League, which crunches a lot of data in developing its forecast. The group is projecting a COLA increase of 2.63% for 2025, which would effectively round to 2.6%.
I’ve seen other projections as high as 3.0%, which could happen but seem unlikely.
SSA COLA versus CPI
In general, the combination of using CPI-W and the smoothing effect of a three-month average results in the Social Security COLA being lower than annual CPI. The Senior Citizens League has lobbied for years to replace CPI-W with CPI-E, and index that more accurately reflects costs faced by older Americans.
For 2024 the COLA was 3.2% even though CPI-U increased 3.7% over the September 2022 to September 2023 period. In some years, however, the COLA has outpaced official inflation. That doesn’t look likely for 2025.

Also read: Does The Social Security COLA Shortchange Seniors?
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David Enna is a financial journalist, not a financial adviser. He is not selling or profiting from any investment discussed. I Bonds and TIPS are not “get rich” investments; they are best used for capital preservation and inflation protection. They can be purchased through the Treasury or other providers without fees, commissions or carrying charges. Please do your own research before investing.












It definitely caused at least a small reduction in six-month inflation. What's amazing is if the United States didn't attack…