How Rising Medicare Part D Premiums Will Hit Retirees in 2026

Medicare beneficiaries will see average Part D premiums rise 6.5 percent in 2026, according to the latest projections from the Centers for Medicare & Medicaid Services. That means the typical enrollee could pay about $52 a month instead of the current $49, adding more than $35 a year.

For those with higher incomes, the income-related monthly adjustment amount, or IRMAA, will push totals even higher. These increases come as the program absorbs changes from the Inflation Reduction Act, including a $2,000 annual out-of-pocket cap starting in 2025 that shifts costs to premiums.

At a time when many retirees live on fixed incomes, even small monthly jumps matter. Understanding exactly how these changes affect your wallet can help you choose the right plan during the October 15 to December 7 open enrollment period and avoid nasty surprises next year.

Why Part D Costs Are Going Up

The main driver is the redesign of Part D under the Inflation Reduction Act of 2022. Starting in 2025, the program eliminates the coverage gap known as the donut hole and caps total annual out-of-pocket spending at $2,000 for covered drugs.

To pay for this protection, insurers are raising base premiums. The Centers for Medicare & Medicaid Services projects the average monthly premium for stand-alone Part D plans will reach $52.00 in 2026, up from about $49 in 2025.

In addition, more expensive specialty drugs and the $35 monthly insulin cap add pressure. Plans must also cover more vaccines at no cost. These factors combine to push premiums higher even though many individuals will spend less at the pharmacy counter once they hit the cap.

Higher-income retirees face extra IRMAA surcharges that begin at $103,000 for individuals and $206,000 for couples in 2026, based on 2024 tax returns.

How the $2,000 Cap Changes Your Spending

Before 2025, beneficiaries who reached $8,000 in total drug costs entered catastrophic coverage and paid 5 percent coinsurance with no upper limit. The new $2,000 cap ends that exposure.

In 2026, once you spend $2,000 out of pocket on covered drugs, the plan pays 100 percent of remaining costs for the year. According to a Kaiser Family Foundation analysis, about 1.4 million people hit the old catastrophic threshold in 2022.

Those heavy users will save the most under the new rules. However, everyone pays for the protection through higher premiums. People who take few or no medications may end up subsidizing those who use expensive drugs.

The Medicare Payment Advisory Commission estimates the average beneficiary’s total Part D spending, including premiums and out-of-pocket costs, will drop slightly for high users but rise for low users.

Income-Related Surcharges in 2026

If your modified adjusted gross income from two years earlier exceeds certain thresholds, you will pay IRMAA on top of the plan premium. For 2026, the brackets remain the same as 2025: individuals with income above $103,000 and couples above $206,000 pay extra.

The lowest surcharge adds $13.70 per month; the highest, for incomes over $500,000 individual or $750,000 joint, adds $81.00. These amounts are per person, so a couple can pay double.

Social Security deducts the surcharge directly from your benefit check. Because the thresholds are not adjusted for inflation, more retirees are expected to fall into these brackets each year.

The number of people paying IRMAA has grown from 1.6 million in 2010 to more than 3.5 million today, per CMS data.

Choosing the Right Plan During Open Enrollment

Open enrollment for 2026 coverage runs from October 15 to December 7, 2025. Use the Medicare Plan Finder at Medicare.gov to compare total estimated costs, not just premiums.

Enter your exact prescriptions, dosages, and pharmacies. The tool shows your total annual cost including deductible, copays, and premium. Many plans now offer $0 deductibles but charge higher copays for certain tiers.

Look at whether your drugs are on the formulary and which tier they sit in. Tier 1 and 2 generics usually cost the least. Also check the pharmacy network; using an out-of-network pharmacy can double your costs.

Consider Medicare Advantage plans that bundle Part D coverage. In 2025, 54 percent of Medicare beneficiaries were in Advantage plans, according to the Kaiser Family Foundation.

Some Advantage plans have $0 premiums and still provide solid drug coverage.

Strategies to Keep Costs Down

Three practical moves can reduce what you pay. First, ask your doctor about lower-cost alternatives or generics. Second, use mail-order pharmacies or preferred retail pharmacies listed in your plan.

Third, explore patient assistance programs from drug manufacturers for brand-name drugs not fully covered. The Partnership for Prescription Assistance connects people to more than 475 programs.

If you expect high drug costs, choose a plan with a lower deductible and better coverage in the initial phase even if the premium is slightly higher. Review your plan every year; the one that was cheapest last year may not be this year.

According to a 2024 study by the Commonwealth Fund, beneficiaries who switched plans saved an average of $312 per year.

What the Numbers Mean for Typical Retirees

Consider a retiree taking three common medications: atorvastatin, metformin, and lisinopril. In many basic plans, total annual cost including premium might run $650 to $850.

A retiree taking Eliquis and Januvia could easily hit the $2,000 cap and then pay only the premium for the rest of the year. For those individuals, the higher premium is a bargain.

People with very low drug costs might see their total spending rise by $60 to $120 a year. The key is to run the numbers for your own prescriptions rather than rely on averages.

Medicare trustees project total Part D spending will reach $156 billion in 2026, up from $135 billion in 2024, showing the growing burden on the system.

Long-Term Outlook and Policy Changes

The Inflation Reduction Act also allows Medicare to negotiate prices on selected high-cost drugs. The first ten drugs selected for negotiation will have lower prices starting in 2026.

An additional 15 drugs will be added in following years. These price cuts should eventually ease premium pressure, but experts say the effect will be modest at first. The Medicare Board of Trustees warns that without further reforms, Part D spending will grow faster than the economy.

For now, the best protection for your wallet is to treat plan selection as an annual task, not a set-it-and-forget-it decision. Small differences in premiums and copays add up over a retirement that can last 20 or 30 years.

Rising Part D premiums are not something you can ignore. Take time before open enrollment to list every drug you take, including dosage and how often you refill. Plug those numbers into the Medicare Plan Finder and compare at least three plans side by side.

Factor in both the monthly premium and your expected out-of-pocket costs under the new $2,000 cap. If your drugs are expensive, the cap will save you money even with a higher premium.

If your costs are low, look for the lowest-premium plan that still covers your medications at reasonable copays. Review your choice every fall. A few hours of work each year can protect hundreds of dollars over the long run and give you peace of mind that your prescription coverage still fits your budget and your health needs.

Sources

• Centers for Medicare & Medicaid Services, 'Medicare Part D Projected Premiums and Announcements' (2025)
• Kaiser Family Foundation, 'Medicare Part D in 2025 and Trends Over Time' (2025)
• Medicare Payment Advisory Commission, 'Report to the Congress: Medicare Payment Policy' (2025)
• The Commonwealth Fund, 'How Medicare Beneficiaries Fare Under the New Part D Benefit Design' (2024)
• Board of Trustees, Federal Hospital Insurance and Federal Supplementary Medical Insurance Trust Funds, '2025 Annual Report'