CMS has released a key national Part D benchmark, but beneficiaries still need to wait for plan-level premiums, formularies and pharmacy details.
The Bottom Line
CMS set the 2027 Part D base beneficiary premium at $41.33, up from $38.99 in 2026. That 6% increase is a statutory benchmark—not a quote for any individual plan. Actual premiums can be higher or lower, and total annual cost will still depend on medicines, formularies, deductibles, pharmacies and subsidies.
What CMS announced
The Centers for Medicare & Medicaid Services released preliminary technical information for the 2027 Medicare prescription-drug market. The national average monthly bid amount will be $296.05, and the base beneficiary premium will be $41.33. The base premium is used in a statutory formula for plan-specific basic premiums. It should not be read as the average amount every beneficiary will pay. CMS said it expects to release the finalized Medicare Advantage and Part D landscape, including final average premiums and available plan offerings, in mid-to-late September.
Why the base premium rose 6%
The Inflation Reduction Act limits annual increases in the Part D base beneficiary premium to no more than 6% from 2024 through 2029. The 2027 figure equals a 6% increase from the 2026 base of $38.99. This cap applies to the national base benchmark, not necessarily to the premium of a specific stand-alone prescription-drug plan. Plan bids, benefits and regional conditions can produce different outcomes for enrollees. Income-related surcharges may also apply separately to higher-income beneficiaries.
A stabilization program is ending
CMS also said the voluntary Part D Premium Stabilization Demonstration for stand-alone prescription-drug plans will end after 2026. The program began in 2025 as redesigned Part D benefits took effect. CMS said sponsors now have enough experience with the redesign to prepare bids under traditional market conditions. Ending the demonstration does not by itself prove that every premium will rise sharply. It does mean comparisons during the coming enrollment season deserve extra attention because plan pricing can change unevenly.
What to compare beyond the premium
Start with the medicines you actually use. Confirm that every drug remains on the formulary and check its tier, prior-authorization rules and quantity limits. Compare the annual deductible, preferred pharmacies and mail-order prices. Estimate a full-year cost rather than multiplying the monthly premium by twelve. A low-premium plan can cost more overall if a regular prescription moves to a less favorable tier or a nearby pharmacy is no longer preferred. Check whether you qualify for Extra Help, and never assume that automatic renewal is the cheapest option.
A practical preparation list
Make a current medication list with dosage and frequency. Record your preferred pharmacies and whether home delivery matters. Save your 2026 plan’s Annual Notice of Change when it arrives. Circle changes in premiums, deductible, formulary, pharmacy network and authorization rules. When official 2027 plan information becomes available, compare at least the current plan and two alternatives using the same medication list. If a choice is complex, contact Medicare or a State Health Insurance Assistance Program for neutral counseling.
Premium versus total annual cost
A monthly premium is visible and easy to compare, but it may be a small part of the household’s final spending. A plan with a lower premium can become more expensive if a medicine is placed on a higher tier, subject to coinsurance or available only through a less convenient pharmacy. Conversely, a somewhat higher premium may buy better coverage for a costly regular prescription. Build comparisons around expected annual spending: twelve months of premiums, the deductible, likely copays or coinsurance and realistic pharmacy use. Unexpected medical needs cannot be predicted perfectly, so also compare how each plan handles drugs that might be added during the year.
Where to get neutral help
Medicare’s official Plan Compare tool becomes most useful when plan details are finalized and the user enters an accurate medication list. Beneficiaries can also call 1-800-MEDICARE or contact their State Health Insurance Assistance Program. SHIP counseling is designed to provide local, one-on-one help without selling a plan. Anyone assisting a family member should keep notes about the medicines, pharmacies and priorities used in the comparison. Avoid giving a Medicare number or banking information to unsolicited callers who claim that a plan change must be completed immediately.
What to watch next
The most important information is still ahead: plan-by-plan premiums, regional availability, formularies and pharmacy networks. CMS says the 2027 landscape and final average premiums are due in mid-to-late September. Medicare Open Enrollment runs from October 15 through December 7. Beneficiaries should use September to organize records, not to make conclusions from the $41.33 benchmark alone.
Sources and methodology
This article uses CMS’s July 28, 2026 Part D bid-information fact sheet and the agency’s 2027 rate materials. Dollar figures are national program benchmarks unless explicitly described otherwise. This is general educational information and not individualized Medicare or tax advice.
Official sources
- CMS Part D 2027 bid information
- CMS 2027 rate materials
