The 2027 Social Security cost-of-living adjustment (COLA) is forecast at 3.5%, with the official figure due on Wednesday, October 14. Yahoo Finance reports that The Senior Citizens League (TSCL) expects 3.5%, down 0.1 point from its previous forecast of 3.6%. The increase would take effect in January 2027.

The Latest Forecasts

  • The Senior Citizens League: 3.5%, its final forecast after August inflation data.
  • Mary Johnson: the independent Social Security and Medicare policy analyst also sees 3.5%, though she warns volatile oil prices could change the final figure.
  • AARP: NewsNation reports it adjusted its estimate from 3.6% to 3.5%.
  • Kiplinger: staff economist David Payne projects 3.6%, arguing that high energy prices bleed into other categories.

How Much Could Your Check Rise?

  • $2,000 monthly benefit: about $70 more, to roughly $2,070, at 3.5%.
  • Average benefit: TSCL estimates a rise of $67.90, from $1,940.08 to $2,007.98 a month.
  • At 3.6%: a $2,000 benefit would rise by about $72.

How the COLA Is Calculated

The COLA is based on the average of the CPI-W for July, August and September. The CPI-W is the consumer price index for urban wage earners and clerical workers. Two of the three months are already in, so the final number depends on September's inflation report. The Social Security Administration announces the COLA after the Bureau of Labor Statistics releases that data.

Why the Forecast Has Moved

NewsNation notes that TSCL's estimate has changed through the year: 3.9% in April, 3.6% in August and 3.5% last month. Some pages still show older, higher figures such as 3.8% or 4.7%, which date from spring and are outdated. August's CPI rose 3.4% from a year earlier.

How It Compares

  • 2026 COLA: 2.8%.
  • 2025 COLA: 2.5%.
  • 2027 forecast: 3.5%, which would be larger than either of the last two adjustments.

Will It Feel Like Enough?

Retirees may not feel the full benefit. Higher Medicare Part B premiums can reduce the net increase. TSCL's 2026 survey found 89% of older Americans thought the current year's COLA was too low, and 44% said Social Security provides all their income. TSCL's Shannon Benton said the size of the COLA matters, as does how accurately it reflects real-world expenses.

What to Do Now

  • Watch for the official announcement on October 14.
  • Look out for your individual benefit notice later this year.
  • Plan for Medicare premium changes when estimating your net increase.

Key Takeaways

  • The consensus forecast for the 2027 COLA is 3.5%.
  • The official figure comes October 14, after the September CPI release.
  • On a $2,000 benefit, 3.5% adds about $70 a month.