Social Security’s 3.5% COLA Bump in 2027 Would Be Largest in 4 Years — But Soaring Medical Costs Could Wipe Out Every Penny

7,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% S&P 5007,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% S&P 5007,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% S&P 5007,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% S&P 5007,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% S&P 5007,823.60+0.58%Dow Jones51,740.80+0.91%Nasdaq 10030,928.20+0.38%Russell 20002,809.13+0.43% Investing Social Security’s 3.5% COLA Bump in 2027 Would Be Largest in 4 Years — But Soaring Medical Costs Could Wipe Out Every Penny Social Security's biggest raise in four years sounds like good news until you see what Medicare does to it before the money ever hits your bank account.

On October 14, the Social Security Administration will announce the 2027 cost-of-living adjustment (COLA) for about 70 million beneficiaries. The Senior Citizens League projects a 3.5% raise, up from 2.8% for 2026. On a $2,000 monthly check, that works out to about $70 more per month before Medicare takes its cut.

That last part is where the real story is, since the Medicare deduction comes out of the same check and the 2027 Part B premium has not been set. AARP reported this week that the Part B premium is expected to rise in 2027.

The COLA formula relies on a specific comparison. It measures the average Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) for July, August and September against the same quarter a year earlier. With two of the three months reported, the measure is tracking toward 3.3%. The August reading of 328.5 rose 0.4% in a single month. September data will decide whether the final figure comes in near 3.3% or the League’s 3.5%. Either one beats this year’s 2.8%.

Last year shows how it plays out. The standard Part B premium rose from $185.00 in 2025 to $202.90 in 2026, an increase of $17.90 a month, or about 9.7%. The Part B deductible climbed to $283, and the Part A hospital deductible rose to $1,736. The Centers for Medicare & Medicaid Services (CMS) blamed the premium jump mainly on “projected price changes and assumed utilization increases”. The agency said the premium would have been about $11 a month higher without new limits on spending for skin substitutes.

If the 2027 premium rises by the same amount, it would take about 26% of the projected $70 raise. That happens before a retiree fills a single prescription or pays a copay.

On paper, medical inflation is soft. The medical care part of the broader Consumer Price Index (CPI) rose just 1.6% in the year through August. Households see it very differently. The latest New York Fed Survey of Consumer Expectations shows Americans expect medical care prices to rise 9.2% over the next year. That is the highest of any category in the survey and far above the 3.9% they expect for overall inflation. Rent expectations are at 6.8%.

The survey shows how all adults feel, so it is neither an official forecast nor a retiree-specific measure. Still, the gap explains the frustration. Retirees pay for care through premiums, deductibles and out-of-pocket costs that reset every January, and those bills can rise much faster than the medical price index suggests. CPI-W is based on the spending of working households. They put a smaller share of their budgets toward health care than retirees do. That is a long-running flaw in the way Social Security adjusts for inflation.

The first number comes with the September CPI-W data and the October 14 announcement. The second is the 2027 Part B premium, which CMS usually releases in November. The 2026 figures came out on November 14, 2025. If the next increase comes close to last year’s $17.90, a 3.5% COLA will look much smaller in the January deposit.

For investors approaching retirement, the lesson goes beyond Social Security. Portfolio income has to keep pace with real costs. Whether from dividends or bond coupons, it must keep up with the expenses its owner actually faces, including medical bills and Medicare premiums. Matching headline CPI is not enough. A retirement plan built on the official index will underestimate the expenses that matter most heavily after 65.

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After two decades of patrolling the dark corners of suburbia as a police officer, Rich Duprey hung up his badge and gun to begin writing full time about stocks and investing. For the past 20 years, he’s been cruising the markets looking for companies to lock up as long-term holdings in a portfolio while writing extensively on the broad sectors of consumer goods, technology, and industrials. Because his experience isn’t from the typical financial analyst track, Rich is able to break down complex topics into understandable and useful action points for the average investor. His writings have appeared on The Motley Fool, InvestorPlace, Yahoo! Finance, Money Morning, and, of course, 24/7 Wall St. He has been featured in both U.S. and international publications, including MarketWatch, Financial Times, Forbes, Fast Company, and USA Today.

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