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Social Security recipients are on track for their largest benefit increase since 2023, with estimates for the 2027 cost-of-living adjustment (COLA) converging around 3.5% to 3.6% as new inflation data rolls in.
The range of projections currently runs from 3.4% to 3.6%, already topping the 2.8% increase that took effect for 2026. The final number won’t be official until October, but the trend in recent inflation reports has pushed most estimates upward, and advocacy groups tracking the data say a jump of this size would mark the biggest annual adjustment in Social Security payments since 2023.
How the Number Is Calculated
By law, the annual COLA is calculated using Bureau of Labor Statistics consumer price index data for July, August and September, based on a variant of the dataset known as CPI-W, which measures prices paid by urban wage earners and clerical workers. The Bureau of Labor Statistics reported that the Consumer Price Index for Urban Wage Earners and Clerical Workers rose 3.5% in August compared with a year earlier. The broader CPI, meanwhile, was up 3.4% over the same period.
Because the formula only accounts for three months of data, September’s report will be decisive. The Social Security Administration will announce the official 2027 adjustment on Oct. 14, after that final CPI report is released, giving beneficiaries and policymakers a firm number just before the calendar turns.
Competing Estimates Narrow the Range
Several organizations have released their own projections in recent weeks, and while the figures differ slightly, they are clustering close together.
- The nonpartisan Committee for a Responsible Federal Budget estimated the 2027 COLA at 3.4%, based on the latest inflation data.
- AARP now forecasts a 3.6% increase, which it said would raise the average retired worker’s benefit by $75 per month.
- The Senior Citizens League projects 3.5%, down slightly from the 3.6% estimate it had put out just a month earlier; the group said that latest figure would translate into a $67.90 increase in average monthly benefit checks.
The fact that these estimates have shifted from month to month underscores how sensitive the final calculation is to incoming inflation reports. The Senior Citizens League’s downward revision from 3.6% to 3.5% in a single month shows just how much the numbers can move before the official announcement locks in a final figure.
What It Means for Beneficiaries
The stakes are significant for the roughly 75 million Social Security and Supplemental Security Income beneficiaries nationwide. That figure, reported by the Social Security Administration, reflects how broadly any adjustment ripples across the country, touching retirees, disabled workers, and survivors alike. In 2026, that population saw a 2.8% boost to their benefits, an increase that was itself higher than the 2.5% COLA implemented at the start of 2025, according to the Senior Citizens League.
The dollar impact of a COLA depends heavily on a beneficiary’s starting monthly payment. The average retired worker received $2,071 a month in Social Security benefits as of January, according to the Social Security Administration. A more recent snapshot from the agency’s July Monthly Statistical Snapshot put the average monthly benefit for retired workers slightly higher, at $2,085.98. Applying a 3.5% to 3.6% increase to figures in that range produces the kind of $67 to $75 monthly boost that AARP and the Senior Citizens League have both cited in their estimates.
For context, the size of COLA increases has swung dramatically over the past decade. The Social Security Administration noted that the adjustment ranged from 0% in 2016 to 8.7% in 2023, the highest increase in four decades, driven by a sharp spike in inflation that year. Compared with that extreme, a 3.5% to 3.6% increase for 2027 would be far more modest, but it would still represent a meaningful jump from the 2.8% adjustment beneficiaries received for 2026, and it would be the largest since that 2023 spike.
Waiting on the September Numbers
For now, all eyes are on the September CPI report, the last piece of data needed to finalize the formula. Until the Bureau of Labor Statistics releases that report and the Social Security Administration makes its Oct. 14 announcement, the 3.4% to 3.6% range represents the best available guidance for the tens of millions of Americans who depend on their monthly Social Security check.
Whether the final figure lands closer to the Committee for a Responsible Federal Budget’s more conservative 3.4% estimate or AARP’s higher 3.6% projection, beneficiaries can expect notably more relief than they received heading into 2026. Advocacy groups tracking the data continue to update their forecasts as new inflation numbers arrive, but the direction of travel points toward the most substantial cost-of-living bump in several years.
