The 2027 Social Security Raise Is Tracking at About 3.6%. On the Average Check That’s Roughly $75 a Month, and Medicare Will Take Part of It Back.

The 2027 Social Security Raise Is Tracking at About 3.6%. On the Average Check That’s Roughly $75 a Month, and Medicare Will Take Part of It Back.

David Beren

Mon, September 7, 2026 at 7:04 PM GMT+3 5 min read

Quick Read

• The 2027 Social Security COLA is projected between 3.1% and 3.6%, which would add roughly $60 to $75 per month to the average $2,000 benefit.

• A Medicare Part B premium hike similar to 2026's $17.90 increase could erase nearly a quarter of that raise before it arrives.

• Fixed tax thresholds mean each COLA can quietly push more Social Security income into taxable territory, shrinking the real net gain further.

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The 2027 Social Security cost-of-living adjustment is still a projection, not a done deal. It is based on a partial data set and will not become official until the Social Security Administration makes the announcement in mid-October, once the September inflation numbers are released. Any figure you see for 2027 right now is just an estimate. The only settled numbers are the current 2026 Medicare figures.

The COLA is calculated by comparing the third-quarter average of the Consumer Price Index for Urban Wage Earners and Clerical Workers, known as CPI-W, against the same quarter a year earlier. As of the July 2026 reading, with only one of the three Q3 months in, the projected 2027 adjustment is tracking near 3.1%. Advocacy estimates published earlier in the summer put the figure closer to 3.6%. The point is that the range is still moving. A single hot or cool CPI-W print in August or September can shift the final result by tenths of a point.

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What the Estimate Means on the Average Check

Applying a 3% to 4% raise to an average retired-worker benefit of roughly $2,000 a month produces a monthly increase of about $60 to $75. That is the plain arithmetic: an estimated percentage applied to an average that describes almost nobody exactly. Individual checks vary based on lifetime earnings and claiming age. Anyone whose benefit is well above or below the average retired-worker figure will see a proportionally different dollar amount.

There is also a longstanding criticism of how the COLA is actually calculated. The CPI-W is built around the spending habits of working-age wage earners, not retirees. And retirees tend to spend more on healthcare and housing, two categories that have historically risen faster than the broader basket of goods. So the COLA formula tends to under-adjust for what retirees actually experience, which is why every time a raise gets announced, the complaints follow right behind.

How Much Medicare Takes Back

The 2027 Medicare Part B premium, the monthly charge for outpatient care that is typically deducted from Social Security checks, has not been announced. The Centers for Medicare and Medicaid Services releases it in November, after the COLA. The best guide is what just happened. For 2026, CMS set the standard Part B premium at $202.90, up $17.90 from the $185.00 premium in 2025. The Part B annual deductible rose to $283 in 2026, up $26 from $257 in 2025. CMS released those figures on November 14, 2025.

If the 2027 premium increase resembles the last one, a meaningful share of the raise disappears before the check ever arrives. A $17.90 monthly premium jump against an estimated $60 to $75 raise leaves noticeably less than the headline number suggests.

Hold Harmless Protection, and Who Does Not Get It

Most beneficiaries are shielded by the hold-harmless provision, which prevents the dollar increase in the Part B premium from exceeding the dollar increase in the Social Security benefit for people who have their premium deducted directly from their check. The raise can be substantially consumed, but not entirely erased. The exclusions matter. Hold harmless does not protect beneficiaries new to Medicare, those who pay income-related monthly adjustment amounts, or those who do not have premiums deducted from their check. Income-related surcharges apply to roughly 8% of Part B enrollees, with the 2026 total premium reaching as high as $689.90 a month at the top income tier (we mapped IRMAA and the other premium traps in a free Medicare guide here: Medicare's Hidden Bills). Part D drug premiums vary by plan and rise on their own schedule.

Tax Squeeze Nobody Talks About

A larger benefit can also push more of Social Security into taxable territory. The combined-income thresholds that determine how much of a benefit is taxable are set in statute and are not indexed to inflation. They have not been adjusted in decades. Every COLA pulls a few more retirees across those fixed lines, quietly increasing the tax bite even as the pretax benefit rises.

What to Watch and When

The September CPI-W reading is the final input. The Social Security Administration announces the official 2027 COLA in mid-October. CMS follows with the 2027 Part B premium and deductible in November. Until both are public, any monthly dollar figure is an estimate built on an estimate.

The raise, whenever it lands, is a backward-looking adjustment for inflation already absorbed. It restores lost ground rather than adding purchasing power. That is the arithmetic worth remembering when the number is announced.

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