Next year’s Social Security cost-of-living adjustment is tracking near 3.8%, according to the latest estimate from a leading advocacy group, a level that would finally let the annual raise outpace the rising Medicare Part B premium instead of being swallowed by it. The figure is a projection, not an official number, and the Social Security Administration will not set the real adjustment until mid-October using summer inflation data. But if the estimate holds, 2027 would break a run of years in which the Part B increase ate up much of the raise.
How the 3.8% projection is calculated and why it could still move
The estimate comes from The Senior Citizens League, whose analysts track the Consumer Price Index for Urban Wage Earners and Clerical Workers, the exact index the government uses to set the adjustment. Its latest reading put the 2027 figure near 3.8% after recent inflation data, as the group explains in its ongoing COLA analysis. That would be the largest raise since the 8.7% surge that took effect in 2023.
Other forecasters land lower. Some independent estimates put the 2027 adjustment in the 3.2% to 3.6% range, and the number has drifted as monthly inflation reports come in. Reporting on the shifting outlook has noted that cooling inflation earlier in the year had pulled some projections down before more recent data nudged them back up, a reminder that any figure quoted now is provisional.
The index itself is a long-running point of contention. The wage-earner measure the government relies on weights the spending of working households, not retirees, who devote a larger share of their budgets to medical care and housing. Advocacy groups, including the one behind the near-3.8% estimate, have argued for years that this understates the inflation older Americans actually face, which is part of why a raise that merely keeps pace with the premium has so often felt to recipients like standing still.
The adjustment is locked in only when the government releases inflation data for July, August, and September. The COLA is the percentage change in the average of that third-quarter index against the same three months a year earlier, so a hot or cool September can still move the final number by a few tenths of a point in either direction.
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What a 3.8% raise means next to a $209.50 Part B premium
The comparison that matters to retirees is the raise set against the Medicare Part B premium, which is deducted directly from most Social Security checks. Medicare’s trustees have projected a standard 2027 Part B premium of about $209.50, up $6.60 from the $202.90 charged in 2026, an increase of roughly 3.25%. A COLA near 3.8% would rise faster than that, leaving something extra in the net check rather than handing it all back to Medicare.
The scale of the difference is modest but real. For a retiree collecting $2,000 a month, a 3.8% raise adds about $76, while the projected premium increase claims roughly $6.60 of it, leaving close to $69 in added monthly income. In several recent years the premium hike consumed a far larger share of the raise, and in some it erased most of the gain for lower-benefit recipients.
The stakes scale with the size of the benefit. A retiree drawing a larger check sees a bigger raise in absolute dollars from the same percentage, while the Part B increase is a flat amount that hits every enrollee equally. That means the projected premium hike takes a smaller bite out of a high earner’s raise and a larger one out of a modest benefit, so the gap between the adjustment and the premium matters most to the retirees living closest to the edge.
Projections of the premium itself carry their own uncertainty. The trustees’ 2027 estimate is a forecast that Medicare will confirm later in the year, and the final premium has at times come in above or below the projection. If the actual Part B increase lands higher than $6.60, the cushion between the raise and the premium narrows accordingly.
Why the official numbers won’t be settled until the fall
Both halves of this equation are announced within weeks of each other in the fall. The Social Security Administration typically releases the official COLA in mid-October, right after the September inflation report, and the figure takes effect with January benefit payments. Medicare generally confirms the following year’s Part B premium in November, once its own cost calculations are complete.
Until those announcements arrive, every figure in circulation is an estimate built on incomplete data. The direction of travel is what stands out this year: independent trackers and the trustees’ own numbers point toward a raise that, for the first time in several years, is on pace to grow faster than the premium that eats into it. Whether that holds depends on inflation readings that have not yet been published.
For households that budget around the January check, the practical takeaway is to treat the 3.8% figure as a working forecast rather than a promised amount. The gap between a raise and a premium hike has decided whether millions of retirees came out ahead in past years, and in 2027 that gap is projected to tilt in their favor, pending the numbers that settle it in October and November.
This article was produced with AI assistance and reviewed against primary sources by The Money Overview editorial team.
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