The Social Security Administration announced a 2.8% cost-of-living adjustment for 2026 last October, promising the average retired worker roughly $50 more per month starting in January. Six months in, most retirees have discovered that promise came with a bill attached.
The Centers for Medicare & Medicaid Services (CMS), in its fall 2025 announcement, set the 2026 standard Part B premium at $202.90 per month, a $17.90 jump from the $185.00 charged in 2025. Because Part B premiums are automatically deducted from Social Security checks for most enrollees, that increase is subtracted before a retiree ever sees the money. For someone receiving the average retired-worker benefit of roughly $1,976 before the COLA, the 2.8% raise adds about $55 per month. After the Part B hike, the net gain drops to approximately $38.
That means the Part B premium increase alone absorbs about 32% of the COLA. But Part B premiums are not the only healthcare cost that rose. The Part B annual deductible climbed from $257 to $274, and many retirees also face higher premiums for Medigap supplemental policies and Medicare Advantage plans. When those costs are factored in, the effective erosion of the COLA approaches half of the headline raise for a typical enrollee.
Why the squeeze keeps getting worse
This pattern has repeated for years, and the underlying mechanics explain why it is unlikely to stop on its own.
Social Security’s COLA is calculated using the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), which tracks spending patterns of working-age households. Retirees, however, spend a far larger share of their income on healthcare. The Bureau of Labor Statistics has published an experimental index called the CPI-E that weights medical costs more heavily, and it has consistently shown higher inflation for older Americans than the CPI-W captures. Congress has never adopted the CPI-E for COLA calculations, despite repeated legislative efforts. The most recent push, the CPI-E for Seniors Act (H.R. 4315, introduced in the 118th Congress), would have required the Bureau of Labor Statistics to publish the CPI-E as an official index and directed SSA to use it for COLA calculations, but the bill did not advance out of committee.
Medicare Part B premiums, meanwhile, are driven by the actual cost of physician services, outpatient care, and drugs administered in clinical settings. CMS has pointed to rising spending on Part B-covered prescription drugs and increased utilization of outpatient hospital services as factors in recent premium growth. These costs are not constrained by the CPI-W; they reflect what Medicare actually pays providers.
The result is a structural mismatch. The raise is pegged to broad consumer inflation. The biggest automatic deduction from retirees’ checks is pegged to healthcare spending that routinely outpaces it. Every January, the raise and the bill show up together, and the bill keeps growing faster.
Who loses the most
The $38 net gain is an average, and it masks sharp differences across income levels.
Retirees with below-average benefits get hit hardest in percentage terms. Someone receiving $1,200 per month in Social Security sees a COLA increase of about $34. The $17.90 Part B premium hike consumes more than half of that, leaving less than $16 in additional spending power before any other healthcare cost increases.
Higher-income retirees face a different kind of squeeze. Under Medicare’s Income-Related Monthly Adjustment Amount (IRMAA), individuals with modified adjusted gross income above roughly $106,000 (or $212,000 for joint filers) pay surcharges on top of the standard Part B premium. In the highest IRMAA bracket, the total 2026 Part B premium can exceed $500 per month, wiping out the COLA entirely and then some.
At the other end, some low-income retirees are partially shielded. Medicare Savings Programs, administered by states, can cover Part B premiums for beneficiaries with limited income and assets. The Part D Low-Income Subsidy helps with prescription drug costs. But enrollment in these programs has historically lagged well behind eligibility. Mary Johnson, a Social Security and Medicare policy analyst at the Senior Citizens League, has noted that “millions of eligible beneficiaries miss out on programs that could eliminate or reduce their Part B premiums, often simply because they don’t know the help exists.” The Medicare Payment Advisory Commission (MedPAC) has echoed that concern in multiple reports to Congress.
One important protection does apply broadly: Social Security’s “hold-harmless” provision prevents a Part B premium increase from actually reducing a retiree’s net Social Security payment compared to the prior year. In other words, the Part B hike can eat into the COLA, but it cannot push a retiree’s check below what it was in 2025. For most enrollees in 2026, the COLA is large enough that the hold-harmless rule does not come into play, but in years with very small COLAs, it has been a critical safeguard.
Steps retirees can take this spring
The federal numbers are set, but retirees still have options worth exploring in April and May 2026:
- Check Medicare Savings Program eligibility. Income limits vary by state and are often higher than people assume. Beneficiaries can apply through their state Medicaid office or call 1-800-MEDICARE (1-800-633-4227) for guidance.
- Challenge IRMAA surcharges if circumstances have changed. IRMAA is based on tax returns from two years prior. Retirees who experienced a qualifying life-changing event, such as retirement itself, a spouse’s death, or divorce, can file SSA Form SSA-44 to request a premium reduction based on current income.
- Compare Medigap plans. Retirees approaching or past their Medigap open enrollment window should compare supplemental policy premiums. Premium differences of $20 to $50 per month between comparable plans can offset or exceed the net COLA loss.
- Review Part D drug coverage under the new out-of-pocket cap. The Inflation Reduction Act’s $2,000 annual cap on out-of-pocket Part D drug costs, which took effect in January 2025, remains in place for 2026. Retirees who have not re-evaluated their Part D plan since the cap was introduced may find they can switch to a lower-premium option without increasing their total drug spending.
A formula mismatch retirees cannot outrun
The Senior Citizens League has estimated that Social Security benefits have lost more than 20% of their buying power since 2010, driven largely by healthcare costs that outrun the annual COLA. Mary Johnson has described the erosion as “a slow-motion pay cut that compounds every single year.” The 2026 numbers fit the pattern precisely.
For the roughly 68 million Americans receiving Social Security benefits as of spring 2026, the arithmetic is straightforward and discouraging. A 2.8% raise translates to about $55 per month for the average retiree. Medicare Part B, according to CMS’s fall 2025 premium announcement, takes back $17.90 of it before the check is deposited. Rising deductibles and supplemental premiums chip away at more. What remains, roughly $38 on average, does not go far against grocery prices, utility bills, and the daily costs that do not wait for Congress to fix a formula.
