Margaret Diaz, a 74-year-old retired school aide in Tucson, opened her January 2026 bank statement expecting a modest bump from Social Security. The cost-of-living raise was there, but it was smaller than she anticipated. Nearly a third of it had already been siphoned off to cover a higher Medicare premium she never asked for and never voted on.
She is far from alone. The Social Security Administration announced a 2.8 percent cost-of-living adjustment for 2026, putting roughly $56 more per month into the average retired worker’s benefit. But about $17.90 of that raise never reaches a retiree’s bank account. It is deducted automatically to cover the higher Part B premium. That single line item wipes out nearly 32 percent of the COLA increase before a retiree buys groceries, fills a prescription, or pays a utility bill. The headline says “more than a quarter,” and that is true. But the precise math lands at nearly a third, which makes the sting worse than the phrase suggests.
For beneficiaries with smaller checks, the share is even steeper. And the pattern has repeated, in one form or another, for years.
The numbers behind the squeeze
Two federal announcements set the stage. In October 2025, the Social Security Administration confirmed the 2.8 percent COLA for 2026, calculated from changes in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). Applied to the average retired-worker benefit, that translates to about $56 per month.
Then the Centers for Medicare and Medicaid Services announced that the standard Medicare Part B premium would rise to $202.90 per month in 2026, up from $185.00 in 2025. The Part B annual deductible also climbed to $283 from $257, adding another $26 in yearly out-of-pocket costs before coverage fully kicks in.
Because most retirees have Part B premiums deducted directly from their Social Security payments, the $17.90 increase is subtracted from the COLA raise automatically. Divide $17.90 by $56 and you get 31.96 percent. That is more than a quarter and, more precisely, nearly a third of the raise gone before it arrives.
Smaller checks get hit harder
The Part B premium is a flat dollar amount, not a percentage of income. That makes the bite proportionally larger for retirees with lower benefits.
Consider a beneficiary receiving $1,500 per month. A 2.8 percent COLA adds about $42, but after the $17.90 premium hike, only about $24 of new money remains, meaning more than 42 percent of the raise is consumed. For someone collecting $1,200 per month, the COLA adds roughly $34, the premium increase eats $17.90 of it, and the retiree keeps only about $16 in additional monthly income, losing more than half the raise.
Retirees with higher lifetime earnings fare better in percentage terms because their larger dollar-amount COLA dilutes the flat premium increase. But higher earners also face Income-Related Monthly Adjustment Amounts (IRMAA), surcharges that push Part B premiums well above the standard $202.90. A married couple filing jointly with modified adjusted gross income above $206,000 on their 2024 tax return, for example, pays significantly more per person, further eroding the value of the COLA.
The hold-harmless guardrail
One protection exists. Under Section 1839 of the Social Security Act, a hold-harmless provision prevents a Part B premium increase from reducing a beneficiary’s net Social Security payment below the prior year’s level. If someone’s COLA increase is smaller than the premium hike, the premium is capped so the net check does not shrink.
This matters most in years when the COLA is very small or zero. In 2026, with a 2.8 percent adjustment, the vast majority of beneficiaries receive a COLA large enough to absorb the full $17.90 increase, so the hold-harmless clause will not come into play for most people. But for a small number of retirees with very low benefit amounts, it could prevent an outright reduction in take-home pay.
A pattern that keeps tightening
This is not a one-year story. The squeeze has been building:
- 2023: An 8.7 percent COLA delivered unusually large raises, and Part B premiums actually dropped from $170.10 to $164.90, giving retirees a rare breather. Net gain per average check was among the largest in decades.
- 2024: A 3.2 percent COLA was partially offset by a Part B premium increase to $174.70, trimming roughly $10 per month from the raise for the average beneficiary.
- 2025: A 2.5 percent COLA was paired with a premium jump to $185.00, with the premium hike absorbing a growing slice of the adjustment.
- 2026: A 2.8 percent COLA meets a premium of $202.90. The $17.90 increase is the largest single-year dollar jump in this sequence, leaving the average retiree with only about $38 in net new monthly income.
The underlying dynamic is structural. Social Security COLAs are tied to a broad consumer price index. Medicare Part B premiums are tied to projected healthcare spending, which has consistently grown faster than general inflation over the past two decades. As long as that gap persists, each year’s COLA will lose a larger share to healthcare costs.
It is worth noting that some researchers and advocacy groups have long argued the CPI-W itself understates inflation for seniors, because older Americans spend a disproportionate share of their income on healthcare and housing. The Bureau of Labor Statistics publishes an experimental index, the CPI-E, that tracks spending patterns of Americans 62 and older. It has historically run slightly higher than the CPI-W, suggesting that the official COLA may already be falling short of actual cost increases retirees face, even before the Medicare deduction.
What is still unclear
As of spring 2026, CMS has not published a detailed breakdown of how the $17.90 premium increase splits among specific cost drivers like physician fees, outpatient drug spending, and administrative overhead. The agency described the increase in terms of projected overall program costs and statutory requirements, but the granular allocation has not been made public.
The net impact on low-income beneficiaries is also difficult to pin down precisely. Seniors who qualify for Medicare Savings Programs or the Extra Help low-income subsidy may have some or all of their Part B premiums covered by state Medicaid agencies. But neither CMS nor the SSA has released data showing how many people in those programs will see their subsidies fully offset the 2026 increase versus those who face a gap.
Meanwhile, CMS has indicated that Medicare Advantage and Medicare Prescription Drug plan availability and average premiums are expected to remain stable at the program level in 2026. That does not address whether individual enrollees face higher copayments, narrower networks, or other changes that increase effective out-of-pocket spending within those plans.
Steps retirees can still take
Retirees who have not already reviewed their December 2025 benefit notice from the SSA should do so now. That letter spells out the new gross benefit amount, the updated Medicare premium deduction, and the net payment arriving each month. Comparing it with the prior year’s statement shows exactly how much of the COLA survived.
Those on tight budgets should update monthly spending plans to reflect the smaller-than-expected increase in take-home benefits. That includes revisiting automatic bill payments to avoid shortfalls now that the new amounts are in effect.
Beneficiaries who are close to income thresholds for assistance programs should contact their state Medicaid office or a local State Health Insurance Assistance Program (SHIP) counselor. The higher premium and deductible may change eligibility for Medicare Savings Programs or Extra Help, and those programs can cover part or all of the Part B cost.
Retirees who earned enough to trigger IRMAA surcharges based on 2024 tax returns should check whether a life-changing event, such as retirement itself, a reduction in work hours, or the death of a spouse, qualifies them to request a lower premium through SSA Form SSA-44.
The raise that shrinks before it arrives
On paper, 2.8 percent is a reasonable cost-of-living adjustment, higher than the 2.5 percent retirees received in 2025. But when nearly a third of the increase is automatically redirected to cover rising healthcare premiums, the raise shrinks before it ever reaches a checking account. For the millions of retired workers who depend on Social Security as a primary income source, the gap between the announced COLA and the money they can actually spend keeps widening, one January at a time.
