Quick answer: The federal subsidy that has been lowering Medicare Part D premiums since 2024 ends after 2026. Starting January 2027, stand alone Part D premiums will be set without that support, and CMS expects most beneficiaries to see an increase of $10 or less per month, though some plans could rise more. The change affects premiums only. Drug coverage itself, and the $2,100 out of pocket cap, remain in place.
Millions of Medicare beneficiaries are about to feel a pinch in their wallets, and it has nothing to do with their health. It has to do with a quiet federal program most people never knew existed.
For the past two years, the Centers for Medicare and Medicaid Services has run a program called the Part D Premium Stabilization Demonstration. In plain terms, the government paid insurers behind the scenes to keep stand alone Part D premiums lower and more predictable while the industry adjusted to the Inflation Reduction Act's changes to prescription drug coverage.
That program ends after 2026.
CMS announced in July 2026 that it will not renew the demonstration for the 2027 plan year. Roughly 25 million people are enrolled in stand alone Part D plans today. In 2026, the subsidy shaved an estimated $16 off the average monthly premium, bringing it down to about $36. Without that support, insurers will be setting 2027 premiums on their own, and early estimates suggest many plans could see meaningful increases. CMS has said most beneficiaries will see an increase of $10 or less, but independent policy researchers note that even a modest dollar increase is a large percentage jump on a premium that low.
No. This change does not eliminate anyone's drug coverage, and the $2,100 annual out of pocket cap on covered drugs remains in place. The change is specific to what people pay in monthly premiums for stand alone plans. The real numbers will not be public until CMS releases 2027 plan details in September, ahead of Open Enrollment, which runs October 15 through December 7, 2026.
Premium increases tend to ripple outward. When Medicare beneficiaries feel squeezed on drug costs, they often start paying closer attention to every prescription they fill, including the ones their premium doesn't fully cover. Deductibles, copays, and drugs that fall outside a plan's formulary can all still leave people paying full price at the counter.
That is where a tool like CompareMedsRx becomes useful, and not just for seniors on Medicare. Anyone facing a gap between what their insurance covers and what they actually owe can benefit from knowing the lowest price available before they hand over a card at the pharmacy.
CompareMedsRx is a free prescription discount platform that aggregates pricing from more than 24 different discount cards in one place. Instead of guessing which discount card might save the most, or not knowing one exists at all, users can search a medication once and see the best available price nearby, instantly.
For people navigating a Part D premium increase, this matters in a few concrete ways:
CMS will not publish final 2027 premiums and plan details until mid to late September. When that happens, it is worth treating the Annual Notice of Change as required reading, not junk mail. Comparing plans against an actual medication list, rather than assuming last year's plan is still the best deal, is the single most useful step before Open Enrollment closes.
And in the meantime, checking CompareMedsRx before every pharmacy visit is a simple habit that costs nothing and could catch savings a Part D plan doesn't offer.
When does the Medicare Part D subsidy end? The Part D Premium Stabilization Demonstration ends December 31, 2026. New premiums without the subsidy take effect January 1, 2027.
How much will my Medicare Part D premium go up in 2027? CMS estimates most beneficiaries will see an increase of $10 or less per month, and some may see no change or a decrease. Exact, plan specific premiums won't be published until mid to late September 2026.
Does the end of the subsidy affect Medicare Advantage plans? No. The subsidy applied to stand alone Part D drug plans. Medicare Advantage plans that include drug coverage were not part of this program.
Is the $2,100 out of pocket drug cap going away too? No. The annual out of pocket cap on covered Part D drugs stays in place regardless of the subsidy ending.
How can I lower my prescription costs if my Part D premium increases? Comparing prices across multiple prescription discount programs, such as CompareMedsRx, can help offset a premium increase, especially for medications that fall outside a plan's formulary or below the deductible.
What is CompareMedsRx? CompareMedsRx (CMRx) is a free prescription discount platform that aggregates pricing from more than 24 discount cards, so users can compare and find the lowest available price on their medications in one search, with no membership or insurance required.
CompareMedsRx is a free service and is not affiliated with Medicare or CMS. It is not a substitute for reviewing your Medicare plan options during Open Enrollment.