What Changed for 2026: The Inflation Reduction Act and Your Drug Costs

The IRA is to Part D what a major remodel is to a house — same address, very different layout. The old rooms still appear in old articles; the new layout is what you actually live in.

Why this matters now

Older Medicare articles, agent training materials, and even some general media still describe Part D in terms of the four phases: deductible, initial coverage, coverage gap (donut hole), and catastrophic. As of 2025, the donut hole effectively no longer exists. The structure is: deductible → initial coverage → catastrophic, with a hard out-of-pocket cap. The math is different. The phases are different. The protections are different.

If you read about Part D online and the article describes the donut hole, you are reading outdated framing. Confirm the year. Cross-check with Medicare.gov.

What is in effect for 2026

Annual out-of-pocket cap on covered drugs: $2,100. Once your covered out-of-pocket spending on Part D drugs reaches $2,100 in a calendar year, you pay nothing for covered drugs for the rest of the year (Medicare.gov). For 2025 the cap was $2,000. The cap will adjust annually thereafter.

Insulin at $35 per month per covered prescription. Each covered insulin prescription is capped at $35 per month under Part D (Medicare.gov — Insulin).

Medicare Prescription Payment Plan (M3P). Beneficiaries can opt in to spread Part D out-of-pocket costs across monthly installments through the calendar year, interest-free (Medicare.gov — M3P). The total cost is the same. The cash flow is different.

Negotiated drug prices on the first 10 drugs. Starting in 2026, Medicare-negotiated prices for the first 10 drugs selected under the IRA take effect. The negotiated prices apply to all Part D plans, with savings reflected in members’ cost share.

No donut hole. The four-phase structure that included the coverage gap is no longer how Part D works. The current path is: pay any deductible up to the plan’s amount → pay tier-based cost share until the out-of-pocket cap → pay nothing for the rest of the year.

Catastrophic coverage at $0. Once you reach the out-of-pocket cap, your catastrophic-phase cost share for covered drugs is $0.

What did not change

It is worth being clear about what the IRA did not change:

• Part D is still optional. You still need to enroll when first eligible to avoid the late enrollment penalty.
• Plan selection still matters. Formularies, tiers, deductibles, premiums, and pharmacy networks still vary across plans. The $2,100 cap is the ceiling; the path to that ceiling varies plan to plan.
• IRMAA still applies. Higher-income beneficiaries still pay an income-based surcharge on top of premium.
• The Part D late enrollment penalty still exists. The 1% per uncovered month calculation is unchanged.
• The Annual Notice of Change still arrives every September. Plans still change their formularies and networks year over year.
• The Annual Election Period is still October 15 to December 7.

The IRA changed the cost structure. It did not eliminate the work of choosing a plan.

How this applies to you

If you take expensive brand-name drugs. The $2,100 cap is the protection. You reach it faster than under the old structure, and once you do, the rest of the year is at no cost on covered drugs.

If you take insulin. Confirm that your specific insulin is on the formulary and capped at $35. Most are; some niche formulations may still require verification with the plan.

If you have trouble paying drug costs in big chunks. Ask your plan about enrolling in the Medicare Prescription Payment Plan (M3P). It is free to enroll. There is no income test.

If you’ve been told “you’ll save thousands.” The IRA is meaningful but the savings are specific. People with high covered drug spending see real savings. People with low drug spending may not see much change.

What this is not

It is not a Medicare overhaul. Part A, Part B, Medigap, and Medicare Advantage are largely unchanged. The IRA is a Part D and drug-price reform.

It is not a guarantee that your specific drug got cheaper. Negotiated prices applied to the first 10 selected drugs. Other drugs continue to be priced under existing plan negotiations.

It is not the end of plan-by-plan variation. The IRA set the floor and ceiling; plans still operate in between. Choosing among Part D plans still matters as much as before.

Same address. New layout. The map has been updated.

The Clearing does not sell insurance, recommend specific plans, or earn commissions. When you are ready to decide, verify the details on Medicare.gov or with a SHIP counselor in your state.