2027 Social Security COLA Forecast Climbs to 3.5%–3.6% After August Inflation Data
Fresh government inflation figures released Sept. 11 have nudged projected Social Security cost-of-living adjustments (COLAs) higher, with leading advocacy groups and independent analysts now forecasting a 3.5% to 3.6% benefit increase for 2027.
According to CNBC, that range would represent the largest annual adjustment since 2023, when beneficiaries received 3.2%.
The official figure will not be confirmed until Oct. 14, when the Social Security Administration announces the final 2027 COLA alongside the Bureau of Labor Statistics' September Consumer Price Index (CPI) report.
Where the Estimates Stand Today
AARP revised its forecast upward to 3.6% after the August CPI data, according to CBS News, up from 3.5% the prior month.
At that rate, the average retired worker's monthly benefit would rise by roughly $75, lifting the average check from approximately $2,071 to around $2,146.
The Senior Citizens League (TSCL), a nonpartisan advocacy group, currently projects 3.5%.
That is down from its earlier estimate of 3.6%; the group's executive director, Shannon Benton, noted that its forecasting model is designed to smooth out sharp month-to-month swings in inflation.
CNBC reported that a 3.5% adjustment would add about $67.90 per month to average benefit checks.
Mary Johnson, an independent Social Security and Medicare policy analyst, also projects 3.5% as of Sept. 11, revised upward from 3.4% the previous month.
Johnson cautioned, as reported by the Detroit Free Press, that the trajectory of oil prices will heavily influence where September's data lands and, in turn, the final COLA figure.
How the Calculation Works
COLAs are determined using the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), a monthly measure published by the Bureau of Labor Statistics.
The SSA compares the average CPI-W for July, August and September of the current year against the same quarter from the last year a COLA took effect. If the average rises, benefits are adjusted upward by that percentage, rounded to the nearest tenth of a point.
In 2026, about 75 million Social Security and Supplemental Security Income beneficiaries received a 2.8% increase, according to the Social Security Administration.
A jump to 3.5% or 3.6% would be a notable step up, Social Security's long-term finances adding context to ongoing concerns about the program's long-term finances.
Limits of the CPI-W Measure
Benton, quoted by the Detroit Free Press, argued that the CPI-W understates the financial pressure on older Americans because it tracks spending patterns of urban workers rather than retirees.
Healthcare and energy costs, which tend to weigh more heavily in senior budgets, can push actual purchasing-power erosion higher than the official adjustment reflects.
Diane Swonk, chief economist at KPMG US, noted in a Sept. 10 report that lower- and middle-income households face far less flexibility to absorb sustained price increases than wealthier ones, an observation that bears directly on fixed-income Social Security recipients.
The September CPI data, the final input needed for the 2027 COLA calculation, is set for release Oct. 14.