The numbers that determine how much your Social Security check goes up next year just got smaller.
That is a full percentage point lower than the 4.7% estimate Mary Johnson gave just a month ago.
What changed? The government's latest inflation reading came in cooler than expected. The consumer price index rose 3.5% over the 12 months ending in June 2026, and that drop was driven largely by falling energy prices.
Mary Johnson, an analyst who tracks Social Security and Medicare independently, offered a simple explanation. "This is a significant drop in inflation, and one that we've rarely seen in the June CPI data over the past five years," she said.
The Senior Citizens League, a nonpartisan advocacy group, pegged its estimate at 3.8%. The official number will come from the Social Security Administration in October.
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For context, the average annual Social Security COLA over the past 10 years has been 3.1%, according to the Social Security Administration. The 2026 increase that more than 75 million beneficiaries already received was 2.8%. So the 2027 projection still looks fairly healthy by recent standards.
A smaller COLA is a trade-off worth watching, because it means less cushion against rising costs elsewhere.
Johnson noted that "the average increase in Part B is usually about 5.4% per year."
But other Medicare costs are climbing faster. The Part D deductible for 2027 will be $700, up from $615. And the catastrophic coverage threshold - the point where your out-of-pocket drug costs are capped - goes from $2,100 to $2,400.
When your benefit increase is roughly in the 3.7% range and your healthcare costs rise by a similar amount, the net gain gets thin fast. That is especially true for retirees who are already feeling squeezed.
A January survey from the Employee Benefit Research Institute and Greenwald Research found that 73% of retirees felt confident about retirement. That sounds decent until you notice it dropped 5 percentage points from the prior survey.
In that same survey, 40% of retirees indicated that their healthcare expenses were more than they had anticipated. That number is the real sting behind a lowered COLA estimate.
A 3.7% or 3.8% increase is still higher than the 10-year average of 3.1%. But the estimate could change between now and October if inflation moves again. The government will announce the final 2027 COLA in October 2026.
For anyone relying on Social Security, the math is worth running now. A smaller benefit increase paired with rising Medicare premiums and deductibles means your net raise may be smaller than the headline number suggests. The good news? Inflation is cooling, and that is the driving force behind both the lower COLA and the pressure on your wallet.
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