A retiree collecting the average Social Security benefit of roughly $1,976 per month got about $55 more in 2026 thanks to the 2.8% cost-of-living adjustment. For many of those same retirees, the latest Medigap renewal notice wiped that gain out and then some. State regulatory filings show Medicare Supplement premiums climbing 12% to 26% this year, depending on the carrier, plan letter, and state. Unlike the standard Part B premium, which is partially cushioned by Social Security’s hold-harmless provision, Medigap bills arrive with no federal shock absorber at all.
Where the numbers come from
The most granular public data sits in New York’s Department of Financial Services filings, which list carrier-by-carrier Medigap rate changes approved for 2026. Several entries exceed 20%, with Globe Life Insurance Company of New York among those cleared for hikes at or near 26%. Because New York uses a prior-approval system, insurers must submit actuarial justifications before the state authorizes new rates. These are not wish-list numbers; they are reviewed, approved increases that policyholders are already paying.
On the federal side, the Centers for Medicare and Medicaid Services set the 2026 Part B standard monthly premium at $202.90. For most beneficiaries, the hold-harmless rule prevents Part B from rising faster than their Social Security COLA. Medigap carries no equivalent guardrail. Premiums are set by private insurers, reviewed at the state level, and passed straight through to policyholders regardless of how much their benefit check grew.
Why the gap hurts so much
Consider a retiree on Plan G, one of the most popular Medigap options. If that policy cost $180 a month in 2025 and the carrier imposed a 15% increase, the new premium is about $207. The retiree’s COLA added roughly $55 a month to Social Security, but the Medigap hike alone consumed $27 of it before groceries, rent, or any other bill entered the picture. At the upper end of the range, a 26% jump on the same base premium would add $47 a month, leaving just $8 of the COLA untouched by a single insurance line item.
That math gets worse for lower-income retirees whose Social Security checks are smaller. Someone receiving $1,200 a month saw a COLA increase of about $34. A double-digit Medigap hike can swallow most or all of it, pushing the net effect on disposable income into negative territory.
What is driving the increases
Medigap premiums reflect medical cost trends, not general consumer inflation. Hospital outpatient spending, specialist visit frequency, and the rising cost of advanced diagnostics all feed into the actuarial models insurers submit to regulators. When medical inflation outpaces the Consumer Price Index that determines the COLA, the gap between benefit growth and premium growth widens. That disconnect is structural: Social Security was never designed to track health-care costs specifically, and Medigap pricing was never tethered to Social Security.
Rating methods also matter. In states that allow attained-age rating, premiums rise automatically as a policyholder gets older, compounding any trend-driven increase. Community-rated states like New York charge the same base rate regardless of age, but that does not prevent large annual adjustments when claims experience deteriorates across the entire risk pool.
What retirees can actually do
Switching Medigap plans is possible but comes with caveats. Outside of a guaranteed-issue period, such as the six-month window that begins when a beneficiary first enrolls in Part B at age 65, insurers in most states can underwrite applicants and deny coverage based on health status. A handful of states, including California, Missouri, and Oregon, offer annual or periodic open-enrollment windows, but the majority do not.
Some beneficiaries explore moving to Medicare Advantage as a lower-premium alternative. That trade-off involves accepting a provider network and prior-authorization requirements that traditional Medicare with a Medigap supplement does not impose. It is a legitimate option for some, but not a painless swap.
No centralized federal database tracks approved Medigap rate changes across all 50 states, which makes comparison shopping harder than it should be. Beneficiaries can check their own state insurance department’s website or call the State Health Insurance Assistance Program (SHIP) for free counseling. As of April 2026, those remain the most reliable channels for finding out exactly what carriers are charging in a given market.
A structural mismatch with no quick fix
The core problem is not any single carrier’s rate request. It is that Medigap pricing and Social Security benefits are governed by entirely separate formulas responding to different economic signals. Until medical cost growth slows to match broader inflation, or until Congress creates a mechanism to limit supplemental premium increases relative to benefit growth, retirees will keep facing years in which their COLA is outrun before the first pharmacy receipt of the year. The 2026 numbers make that mismatch harder to ignore.
