The Catch in the 2027 Social Security COLA That Retirees Aren't Seeing

Social Security is one of the most relied-upon senior benefits today. And for people who don't have any or much income outside of their Social Security checks, the program's annual cost-of-living adjustments, or COLAs, can spell the difference between keeping up with rising costs or falling way behind.

Social Security COLAs used to be dependent on Congress voting them in. Since 1975, they've been automatic. If the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) has a year-over-year increase during the third quarter of the year, Social Security benefits become eligible for a bump that's tied to that increase.

It's too soon to know what 2027's COLA will be, since September's CPI-W hasn't been released yet. But there are estimates that point to a generous COLA in the new year.

A large Social Security COLA might seem like a lifeline for retirees, but there's a hidden cost that could eat away at that upcoming raise.

What current Social Security COLA estimates look like

Even though we don't have a complete picture of CPI-W data for the third quarter of the year, experts can use data from July and August to come up with a COLA estimate. The Senior Citizens League, a nonpartisan advocacy group, thinks the 2027 Social Security COLA will come in at 3.5%. Independent Social Security analyst Mary Johnson agrees with that estimate.

AARP has a slightly more optimistic COLA estimate of 3.6%. But even a 3.5% raise would be significantly higher than the 2.8% COLA Social Security recipients got at the start of 2026.

The number could still change

Though you might think a 3.5% to 3.6% Social Security COLA is a lock, it's important to remember that September's inflation data isn't in yet. If there's a big increase in the CPI-W in September, the 2027 COLA could end up surpassing 3.6%. But if there's a decrease, the opposite could happen, and the final COLA could come in lower.

Of course, a smaller COLA is not necessarily the bad thing some seniors might think it is. A smaller COLA for 2027 would mean that inflation slowed down in September, allowing retirees to pay less for essential goods. It's important to remember that because COLAs are supposed to match inflation, larger ones mean higher price increases and smaller ones mean modest price increases.

A Medicare Part B increase could wipe out part of the COLA

Even though the upcoming Social Security COLA is shaping up to be substantial, a large increase in the cost of Medicare Part B could eat into it. And even a small Part B hike could leave seniors with less of a raise.

Seniors who get benefits from Social Security while being enrolled in Medicare pay for Part B out of their monthly checks. So any increase in the cost of Part B will cut into the COLA.

The good news is that Medicare Part A, which covers hospital care, does not charge most enrollees a premium. So it's only Part B premiums that typically get deducted from Social Security automatically.

A COLA announcement is set for October, but news on Medicare may lag

The Social Security Administration is scheduled to make an official COLA announcement on October 14. That's the date the CPI-W for September is supposed to come out.

But seniors who are enrolled in Medicare may have to wait weeks before an official Part B premium is unveiled. Medicare typically reports its annual costs officially in November. And last year, news of a Part B hike didn't arrive until November 14. So you might have to wait to figure out your 2027 budget even once news of an official COLA comes through.

Bottom line

If Social Security is a big part of your retirement plan for income, you may be eager to know what your 2027 COLA is. And you may be hoping for a large raise. But you should know that even if that raise is generous, you might lose a chunk of it due to an increase in the cost of Medicare Part B.

You should also know that even a generous COLA may not give you as much buying power as expected. The Senior Citizens League says Social Security benefits have lost almost 14% of their buying power over the past 10 years due to insufficient COLAs. So even if the official COLA looks large on paper, it may not hold up well in practice.

If you want to improve your finances in 2027, don't just rely on the upcoming COLA. Instead, take a close look at your spending, make meaningful changes to your budget, and consider part-time work if you could use a boost to your income.

Once you account for Medicare increases, the 2027 COLA might only raise your monthly income by a modest amount. But a part-time job could supplement your Social Security benefits to a much more helpful degree.

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