Medicare Part D

Medicare's New $2,100 Drug Cap: What Changes in 2026

KAHULUI, Hawaii — Starting Jan. 1, 2026, the way Medicare pays for prescription drugs looks different than it did just two years ago. The biggest headline: no one with a Medicare Part D plan will pay more than $2,100 out of pocket for covered prescriptions in a calendar year. For people in Kahului and across Maui County who take costly medications, that ceiling is the most significant change to Part D in a generation.

Here's a plain-English look at what's new, what's gone, and how a lesser-known payment option can help spread those costs across the year.

The $2,100 out-of-pocket cap, explained

For 2026, Medicare has set the annual out-of-pocket limit for Part D covered drugs at $2,100, up slightly from $2,000 in 2025. Once your out-of-pocket spending on covered prescriptions hits that amount in a given year, you pay $0 for the rest of the year on those drugs.

A few important notes:

• The cap applies to what you pay — deductibles, copays, and coinsurance on covered drugs count toward it.
• Monthly premiums do not count toward the cap.
• Drugs your plan doesn't cover don't count either, which is why checking your plan's formulary matters.

This cap applies whether your drug coverage comes through a stand-alone Part D plan or a Medicare Advantage plan that includes drug coverage.

The "donut hole" is gone for good

For years, Medicare enrollees dreaded the coverage gap — the middle stretch of Part D where costs could spike after you and your plan hit a spending threshold. That gap was eliminated in 2025, and it stays gone in 2026.

Part D now has just three phases:

1. Deductible phase — you pay full negotiated price until you meet your plan's deductible (maximum $615 in 2026; some plans set it lower). 2. Initial coverage phase — you pay a copay or coinsurance; the plan pays the rest. 3. Catastrophic phase — after your out-of-pocket spending reaches $2,100, you pay nothing more for covered drugs that year.

No more confusing middle stage. No more sticker shock halfway through the year.

The Medicare Prescription Payment Plan

Even with a $2,100 ceiling, hitting that cap in January or February can hurt if you fill an expensive prescription early in the year. That's where the Medicare Prescription Payment Plan comes in.

This is a free, optional program that lets you spread your out-of-pocket drug costs across the calendar year in monthly installments, instead of paying the pharmacy in one lump when you pick up a prescription. Your plan sends you a monthly bill instead.

Key points:

• It doesn't lower your total drug costs — it smooths them out.
• You must opt in through your Part D or Medicare Advantage drug plan.
• You can join at any point during the year, but joining earlier means more months to spread payments across.
• If you have very low drug costs, it may not be worth the extra billing step. It tends to help most when someone is likely to hit the $2,100 cap.

What this means during Annual Enrollment

The Annual Enrollment Period runs Oct. 15 through Dec. 7, and it's when most people can change their Part D or Medicare Advantage plan for the following year. The Medicare Advantage Open Enrollment Period then runs Jan. 1 through March 31 for those already in an Advantage plan who want to switch once.

Kahului is in Maui County, where residents choose from a range of Medicare Advantage and stand-alone Part D options each year. Plan counts, formularies, and pharmacy networks change annually — so a plan that fit last year may not be the best match this year, especially with the new cap and the payment plan option now in play.

When comparing plans on Medicare.gov's Plan Finder, look at:

• Whether your specific drugs are on the plan's formulary.
• The plan's deductible (up to $615 in 2026).
• Preferred pharmacies near you.
• Whether the plan offers the Prescription Payment Plan (all Part D plans are required to).

A quick word on IRMAA

Higher-income enrollees pay an income-related surcharge (IRMAA) on top of standard Part B and Part D premiums. In 2026, IRMAA begins for single filers with income above $109,000 (and married couples filing jointly above $218,000), based on your 2024 tax return. This is separate from the $2,100 cap and does not affect it.