The Senior Citizens League now projects a 3.9% Social Security COLA for 2027, a forecast that would lift the average retired worker’s monthly benefit by about $81 to $2,162 if it holds. The new estimate is more than a full percentage point above the group’s previous call, reflecting a hotter inflation backdrop that has pushed prices to their highest level since 2023.
That is the headline number beneficiaries care about, because Social Security checks are adjusted for inflation and many retirees watch the cost-of-living increase as the one figure that can offset rising bills. The latest projection would also mark a step up from the 2.8% increase Social Security recipients received for 2026, after the CPI-W rose 2.8% year over year in the third quarter of 2025.
The 3.9% forecast is not a final benefit increase. Social Security COLAs are based on third-quarter inflation data, not April readings, and the actual 2027 adjustment can and probably will end up different once the year’s full inflation pattern is known. Even so, the April CPI-W reading gives the estimate some momentum: it rose 3.9% year over year, while consumer prices in April 2026 were up 3.8% from a year earlier, with grocery costs climbing more than 3% and energy prices jumping sharply.
For retirees, the difference between the headline COLA and the amount they actually keep can be smaller than it looks. Most Social Security recipients over 65 pay Medicare premiums directly from their Social Security payments, and most estimates point to a mild increase in Medicare Part B premiums next year. That means some of the COLA gain could be swallowed before it reaches a bank account.
The point shows up even more sharply in one retiree example tied to Medicare’s income-related surcharge system. A 67-year-old single retiree drawing $4,200 a month from Social Security completed a one-time Roth conversion in 2024 that pushed his modified adjusted gross income from around $80,000 to roughly $140,000, landing him in the third tier of IRMAA. Because the Social Security Administration uses a tax return from two years earlier to set Medicare premiums, the move triggered a $240 monthly surcharge in 2026, according to the example, turning a $117 Social Security raise into a $123 monthly loss.
For people still trying to gauge what the 2027 increase might mean, that is the real caution flag: the COLA may look stronger on paper, but Medicare can take a meaningful bite out of it. With IRMAA thresholds frozen near $109,000 and required minimum distributions beginning at age 73, the way retirees manage income now can affect what they keep later.
The 2027 COLA will not be locked in until third-quarter inflation data is in hand, and that leaves the final number exposed to whatever price pressures emerge between now and then, including broad economic shocks and other disruptions. For now, the 3.9% estimate is the clearest sign that next year’s benefit increase could be larger than this year’s — but not necessarily larger in the pocketbook.
