Medicare will end the federal program that has been holding down premiums for standalone prescription drug plans since 2025, the Centers for Medicare and Medicaid Services announced on Tuesday, returning the market to what the agency calls traditional conditions in 2027.
The CMS fact sheet says plan sponsors now have sufficient experience under the redesigned benefit to price their own bids without the extra support, and that the Part D Premium Stabilization Demonstration will conclude at the end of 2026 in order to "return the program to operating under traditional market conditions."
For the roughly one in four Medicare beneficiaries who buy a standalone drug plan rather than getting coverage through Medicare Advantage, this is the policy decision that shapes what they will see when open enrollment opens in October. It is also, for now, a decision they cannot price out, because the numbers released Tuesday are not the numbers that appear on a plan.
What the Demonstration Did
Congress redesigned the Part D benefit in the Inflation Reduction Act, capping out-of-pocket drug costs and shifting a larger share of catastrophic costs onto insurers. That shift landed in 2025, and plan bids reacted sharply.
To keep premiums from spiking and pushing seniors out of standalone plans, CMS created a voluntary demonstration for 2025 with three parts: a $15 reduction in the base beneficiary premium for participating plans, a cap limiting any plan's year-over-year premium increase to $35, and narrowed risk corridors that reduced sponsors' financial exposure.
The program was scaled back for 2026. The premium reduction dropped from $15 to $10, the increase cap rose from $35 to $50, and the risk corridor protection was eliminated. A Government Accountability Office review published in February found Medicare spent $9.8 billion on the effort.
Now it ends entirely. Nearly all beneficiaries enrolled in a standalone plan in 2025 were in a plan whose sponsor opted into the demonstration, which is why its removal is a market-wide change rather than a niche one.
The Two Numbers CMS Released, and What They Are Not
CMS published two figures on Tuesday, and both are frequently misreported as premiums.
The national average monthly bid amount for 2027 will be $296.05. This is an enrollment-weighted average of plan bids for basic Part D benefits, used to calculate the government's subsidy to plans. It is not a premium and nobody pays it. For context, the same figure was $239.27 for 2026, which makes the 2027 bid average roughly 24 percent higher.
The base beneficiary premium for 2027 will be $41.33. This is the starting point for calculating a plan's basic premium, set by statutory formula. It is also not what anyone pays. The Inflation Reduction Act caps its annual growth at 6 percent through 2029, and $41.33 is precisely 6 percent above the 2026 figure of $38.99.
What a person actually pays is a plan-specific premium that reflects that plan's own bid, its supplemental benefits, the region, and any low-income subsidy. Plan premiums vary from $0 to well above the base figure depending on where you live and which plan you choose.
Why This Is Harder to Predict Than It Looks
The instinct is to assume that removing a subsidy means higher premiums. That is a reasonable expectation, but 2026 is a caution against confident arithmetic.
When CMS scaled the demonstration back last year, analysts widely projected higher standalone premiums. A KFF analysis found that the expected across-the-board increases largely did not materialize, and that enrollees in many states saw lower monthly premiums for most nationally offered plans in 2026 than in 2025.
The forces work in both directions. Removing the subsidy and the increase cap gives sponsors room to raise premiums. Competition, drug price negotiation taking effect, and sponsors' interest in holding enrollment push the other way. Analysts have also warned for two years that a shrinking standalone market tilts beneficiaries toward Medicare Advantage drug plans, which is a structural consequence rather than a premium one.
None of that can be resolved with the figures released this week.
What Beneficiaries Will Learn, and When
CMS says it will release the 2027 Medicare Advantage and Part D landscape in mid-to-late September, along with final average premiums, once plan offerings are finalized. Open enrollment runs October 15 through December 7 for coverage that begins January 1, 2027.
The practical sequence for a household is straightforward. September is when a specific plan's 2027 premium becomes knowable. October through early December is when it can be acted on. Nothing published in July changes a current plan or a current prescription.
Two things are worth doing before then. First, watch for the Annual Notice of Change that plans mail in the fall, which states what a specific plan's premium, deductible, and formulary will be next year. Second, note that the increase cap disappearing means the year-over-year jump on any individual plan is no longer limited, so a plan that held steady in 2026 could move differently in 2027.
Beneficiaries who want help comparing should contact their State Health Insurance Assistance Program, which provides free counseling, or call 1-800-MEDICARE. People with limited income and resources should check eligibility for the Low-Income Subsidy, also called Extra Help, which substantially reduces or eliminates premiums and cost sharing and is checked separately from plan shopping.
Who Carries the Most Risk
The people most exposed are beneficiaries in traditional Medicare who use a standalone drug plan and who do not qualify for Extra Help. Seniors on fixed incomes who pay premiums by check or bank transfer rather than Social Security deduction are also at elevated risk of a specific, avoidable problem. MedicalDaily has reported that thousands of beneficiaries lost Part D coverage after failing to notice premium increases, some for amounts as small as $8.
Anyone in that situation should confirm how their premium is paid and whether the amount changes in January, because a missed increase can terminate coverage rather than simply accrue a balance.
What Happens Next
CMS releases the 2027 landscape and final average premiums in mid-to-late September. Plans mail Annual Notice of Change documents in the fall. Open enrollment opens October 15.
MedicalDaily will report on the September landscape release, on the actual distribution of 2027 standalone premiums by state, and on whether the standalone market continues to contract.
The confirmed fact is that the Part D Premium Stabilization Demonstration ends after 2026 and the 2027 base beneficiary premium will be $41.33. The people most affected are standalone drug plan enrollees without Extra Help. The most reasonable action is to wait for the September landscape and the plan's own notice rather than react to the base figure. The central uncertainty is whether removing the subsidy produces the premium increases that were predicted and did not arrive last year.
Frequently Asked Questions
What did CMS announce? That the Part D Premium Stabilization Demonstration will end after 2026, and that the 2027 national average monthly bid amount will be $296.05 with a base beneficiary premium of $41.33.
Is $41.33 what I will pay? No. The base beneficiary premium is a calculation input. Actual plan premiums vary by plan and region and can be $0 or considerably higher.
Will my premium go up in 2027? That is not yet knowable. Removing the subsidy and the increase cap creates room for increases, but similar predictions for 2026 did not broadly materialize. Plan-level figures come in September.
What did the demonstration actually do? In 2025, it reduced the base beneficiary premium by $15 for participating plans, capped year-over-year increases at $35, and narrowed risk corridors. Support was reduced in 2026.
When will I know my plan's 2027 premium? CMS releases the landscape in mid-to-late September, and plans mail Annual Notice of Change documents in the fall. Open enrollment runs October 15 through December 7.
Does this affect Medicare Advantage drug coverage? The demonstration applied to standalone prescription drug plans. Medicare Advantage plans with drug coverage were not part of it.
Where can I get free help comparing plans? Your State Health Insurance Assistance Program offers free counseling, and 1-800-MEDICARE can direct you to local resources. Check Extra Help eligibility separately.
