Social Security COLA 2027 Forecast: The Number to Watch Before October

Financial forecasters including The Senior Citizens League project a 3.5% Social Security COLA for 2027, which would increase the average monthly benefit by roughly $68 to $2,008 starting in January. The official SSA announcement will be made in October following final September CPI-W data.

Key Takeaways

• This is a forecast, not the official raise. The Social Security Administration announces the actual 2027 COLA in October.
• Calculations are based on third-quarter CPI-W inflation metrics (July, August, and September).
• Following August inflation data, forecasters at The Senior Citizens League and Mary Johnson estimate approximately 3.5%.
• Based on a 3.5% bump, the average monthly check of ~$1,940 would rise by about $68 to ~$2,008 in January 2027.
• Estimates shifted over the summer from 4.7% in June down to 3.5% in September, with September energy shocks acting as the final variable.

This is a forecast, not the raise.

The Social Security Administration announces the official 2027 cost-of-living adjustment in October. It is based on third-quarter CPI-W data covering July, August, and September.

Where Estimates Sit Now

Following August inflation data, Mary Johnson and The Senior Citizens League (TSCL) both landed near 3.5%. If it holds, this would be the largest COLA in three years. TSCL estimates that the average check of roughly $1,940 would rise to about $2,008 in January 2027 — an increase of approximately $68 a month.

How the Projections Moved Over the Summer

• June: One estimate reached as high as 4.7% when energy prices spiked.
• July: Pulled down to about 3.7–3.8%.
• August: Settled around 3.4–3.6%.
• Early September: Clustered at 3.5%.

Energy shocks and September price shifts can still influence the final September CPI print, which serves as the final month in the statutory formula.

What This Is Not

It is not a guarantee of 3.5%, nor is it a new law enacted by Congress. Furthermore, Medicare Part B premium adjustments can offset a portion of the net monthly increase, and long-term trust-fund solvency remains a separate policy debate.

Sources: CNBC (June–August estimates); Senior Citizens League; 401k Specialist (Sept. 11 alignment at 3.5%); SSA statutory calculation process.