A definitive look at the projected costs for Part B and Part D, including the impact of expiring subsidies and rising out-of-pocket caps.
The most urgent question for any retiree planning their finances is no longer just about coverage, but about the specific dollar amount hitting their bank account in the coming year. For 2027, the landscape is shifting dramatically as federal subsidies that previously held down costs are set to expire, forcing a hard reset in pricing for millions of beneficiaries.
According to the Medicare trustees, the standard Part B premium is projected to reach $209.50 in 2027. This figure is not yet finalized but represents a clear upward trajectory from the 2026 standard of $202.90. Meanwhile, the out-of-pocket cap for prescription drugs, known as Part D, is increasing from $2,100 in 2026 to $2,400 in 2027, a change that directly impacts how much a beneficiary might pay in a worst-case scenario for medications.
The End of the Premium Subsidy
A critical driver of the 2027 cost increase is the expiration of a federal subsidy program. Danielle Roberts of Boomer Benefits explained that the CMS Part D premium stabilization program, which was designed to buy down premiums, expires on December 31, 2026. This program was always intended to be temporary, providing a larger benefit in its first year and a smaller one in its second before disappearing entirely.
The removal of this support is already visible in the market. Roberts noted that Part D plans charging more than $200 a month were previously unheard of, but now there are plans in Florida priced at $326 a month for the coming year. This represents a significant jump for many enrollees who have enjoyed lower rates in recent years due to the artificial suppression of costs by the government subsidy.

Part B: The Projected Increase
Part B covers outpatient care and doctor visits, and its standard premium has seen its second-largest dollar increase in history in 2026, rising by $17.90 to reach $202.90. For 2027, the trustees project a further increase to $209.50. While this may seem like a small jump in isolation, it compounds with other rising costs in the healthcare ecosystem.
Higher-income individuals face an additional layer of cost through the income-related monthly adjustment amount. This surcharge kicks in above $109,000 for single filers or $218,000 for joint filers. At the first tier, the Part B premium rises to $284.10, and at the top tier, it reaches $689.90 per month. These figures are critical for anyone with significant investment income or large retirement account withdrawals.

Part D: Caps and Surcharges
Prescription drug coverage has its own distinct cost structure. The base beneficiary premium that CMS uses as a benchmark is $38.99 for 2026, but individual plan premiums vary widely. The most significant change for 2027 is the increase in the annual out-of-pocket cap, which rises from $2,100 to $2,400. This cap limits the total amount a beneficiary can pay for covered drugs in a year, but the increase still means higher potential maximum costs.
In addition to the standard premium, higher-income beneficiaries may face an IRMAA surcharge ranging from $14.50 to $91 per month in 2026. This amount is added on top of the plan premium and applies to those with incomes above the specified thresholds. For a retiree managing chronic conditions requiring expensive medications, this surcharge can significantly alter the total annual cost of care.

The Budget Reality Check
When combining premiums, deductibles, and out-of-pocket costs, the total financial burden becomes clearer. A typical 65-year-old might face roughly $7,500 annually in Medicare-related expenses, a figure that can climb much higher in a bad year. For those in Medicare Advantage plans, hitting the in-network cap of $9,250 could result in total out-of-pocket costs exceeding $13,685, far surpassing the worst-case scenario for Original Medicare, which is around $9,686.
The gap between employer-sponsored benefits and Medicare can be stark. For example, a worker retiring from Walmart might lose zero-cost coverage for drugs like insulin and inhalers, facing up to $2,400 in annual drug costs under Medicare Part D in 2027. This transition highlights the importance of carefully reviewing plan options during the annual enrollment period to avoid unexpected financial shocks.
Strategic Enrollment Considerations
The annual election period runs from October 15 to December 7, 2026, offering a limited window to switch Part D or Medicare Advantage plans. If a beneficiary does nothing, their current plan renews, potentially locking them into higher premiums for the following year. For instance, a plan that increases its premium by $150 a month would cost an additional $1,800 over the course of 2027.
It is crucial to consider not just the premium but the formulary, or drug list, of the plan. A plan with a lower premium might still cost more overall if it does not cover essential medications or has a higher deductible and coinsurance rate. Beneficiaries should also be aware of the late enrollment penalty for Part D, which can add 1% of the national base beneficiary premium for each month without creditable coverage after losing employer benefits.
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