Early 2026 predictions suggested the 2027 Social Security cost-of-living adjustment would closely mirror this year’s increase of 2.8%.
That forecast shifted dramatically after the Iran war drove energy prices higher, pushing inflation expectations upward across many categories.
The nonpartisan Senior Citizens League, known as the SCL, revised its 2027 COLA estimate upward to 3.8% following the surge in energy-related inflation.
A 3.8% adjustment would represent the largest COLA since 2022, when inflation reached a 40-year high, and would rank among the biggest increases of the 21st century.
However, June inflation data has thrown cold water on those elevated expectations, signaling that retirees may receive a smaller benefit increase than recently anticipated.
The June Consumer Price Index for All Urban Consumers came in at 3.5% year over year, but fell 0.4% on a seasonally adjusted basis from May.
Core inflation, which strips out more volatile food and energy prices, also declined from 2.9% in May to 2.6% in June, adding to the downward pressure on COLA projections.
The Social Security Administration determines annual COLAs by comparing average CPI-W figures from July through September against the same period from the prior year, with the result never allowed to go negative.
The CPI-W, or Consumer Price Index for Urban Wage Earners and Clerical Workers, is a subset of the broader CPI-U and is closely correlated with movements in that wider index.
The first critical July CPI-W reading used in the official COLA calculation will not be released until August, meaning the story is far from settled.
One silver lining in the June data is that the decline was heavily driven by falling energy prices, which could reverse if the conflict between the U.S. and Iran continues to escalate.
Re-escalation in that conflict has already begun pushing energy costs back up, which could cause July inflation figures to rebound and lift COLA projections once again.
There is also a broader argument that a lower COLA is not entirely bad news for retirees, since a higher cost of living erodes purchasing power at the same time that benefits rise.
The SCL found in a study published earlier in 2026 that Social Security benefits lost nearly 14% of their purchasing power between 2016 and 2026, suggesting the current COLA formula consistently falls short.
Retirees and analysts alike will be watching July, August, and September inflation data closely as the window for determining the 2027 adjustment enters its most critical phase.
