What is the 2026 Medicare Part D out-of-pocket maximum?

For 2026 there is a hard cap of $2,100 on what you pay out of pocket for covered Part D drugs (your deductible, copays, and coinsurance). Once your spending reaches $2,100, you pay $0 for covered drugs for the rest of the calendar year. The cap was $2,000 in 2025 and is indexed each year. It applies to both standalone Part D plans and Medicare Advantage plans that include drug coverage.

Does the $2,100 cap include my monthly premium?

No. The $2,100 cap is for out-of-pocket drug costs only — your deductible, copays, and coinsurance on covered drugs. Your monthly plan premium (and any Part D IRMAA surcharge for higher incomes) is separate and does not count toward the cap.

What happened to the Part D "donut hole" / coverage gap?

It is gone. The coverage gap (donut hole) was eliminated starting in 2025. Part D now has just three phases: the deductible, then your initial-coverage copays until you hit the $2,100 out-of-pocket cap, then $0 (catastrophic) for the rest of the year.

Can I spread my drug costs out over the year instead of paying at the pharmacy?

Yes. The Medicare Prescription Payment Plan (sometimes called M3P), which began in 2025, lets you pay $0 at the pharmacy and instead get billed monthly by your plan. It is free and optional, and you are never charged more than you would have paid out of pocket — it just smooths the timing. It helps most if you have a high one-time drug cost early in the year. You opt in through your Part D or Medicare Advantage drug plan.

Is insulin really capped at $35 a month?

Yes. Under Part D, each covered insulin is capped at $35 for a one-month supply, and no deductible applies to insulin. The same $35 cap applies to insulin used with a traditional pump (covered under Part B).

Does the cap apply to my Medicare Advantage plan?

Yes. The $2,100 out-of-pocket drug cap applies to both standalone Part D plans (PDP) and Medicare Advantage plans that include drug coverage (MA-PD). The key is still picking a plan whose formulary covers your specific medications at a good tier — that is what we check for you, free.

Updated 2026-06-01 · Medicare brief

The 2026 Medicare Part D $2,100 drug cap — what changed and how it works

Quick answer: In 2026, Medicare Part D caps your out-of-pocket drug costs at $2,100 (up from $2,000 in 2025). Once you reach it, covered drugs cost $0 for the rest of the year. The donut hole is gone, the max deductible is $615, insulin is $35/month, and the free Medicare Prescription Payment Plan lets you spread costs monthly. Applies to standalone Part D and Medicare Advantage drug plans.

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What changed for 2026

The big Part D changes from the Inflation Reduction Act are now fully phased in, and the 2026 numbers stepped up again:

Out-of-pocket cap rose to $2,100 (from $2,000 in 2025). This is a true ceiling — there is no longer any way to spend more than that on covered drugs in a year.
The coverage gap ("donut hole") stays eliminated. It was removed in 2025; there is no separate gap phase anymore.
Maximum deductible is $615 for 2026 (many plans set theirs lower; some are $0).
Insulin remains $35/month per covered product, with no deductible on insulin, and ACIP-recommended vaccines are $0.
The Medicare Prescription Payment Plan continues — the opt-in option to pay your drug costs in monthly installments instead of all at once.

How the 2026 Part D phases work

Part D now moves through three simple phases in a calendar year — no donut hole in the middle:

Phase	What you pay	Details
1. Deductible	You pay 100% of drug costs until you meet your plan’s deductible.	Up to $615 in 2026 — many plans set it lower, and some are $0. No deductible applies to insulin.
2. Initial coverage	You pay copays or coinsurance set by your plan.	Continues until your out-of-pocket spending on covered drugs reaches $2,100.
3. Catastrophic	You pay $0 for covered drugs.	Kicks in once you hit the $2,100 cap — for the rest of the calendar year.

The cap counts your out-of-pocket spending on covered drugs (deductible + copays + coinsurance). Your monthly premium does not count toward it.

The under-used lever: the Medicare Prescription Payment Plan

Even with a $2,100 ceiling, a single expensive prescription can hit you with a big bill in January. The Medicare Prescription Payment Plan (new in 2025, continuing in 2026) fixes the timing: you pay $0 at the pharmacy counter and your plan bills you in capped monthly amounts across the year instead. It is free, it is optional, and you will never pay more in total than you would have anyway.

Helps most if you have a high-cost drug, especially early in the year, and would rather spread the cost.
May not help if your drug costs are low and steady — you would just be moving small amounts to a monthly bill.
You opt in through your plan (standalone Part D or Medicare Advantage drug plan), not at the pharmacy. We can help you decide and enroll.

What this means when you pick a plan

The $2,100 cap is the same on every plan — it is the law, not a feature one plan offers over another. What still varies a lot, and what actually decides your total cost, is:

Whether your drugs are on the plan’s formulary, and at what tier — a drug on a cheaper tier means you reach the cap slower and pay less along the way.
The deductible (anywhere from $0 to $615) and the monthly premium.
Your preferred and mail-order pharmacies being in-network.

That is exactly the comparison we run for free — see also our drug cost checker, 2026 Medicare cost guide, and Medicare enrollment windows.

Related 2026 briefs: Medicare Advantage carrier exits and ACA premium changes.

Worried about your prescription costs in 2026?

Give us your drug list and we’ll run it against the plans in your Texas or Florida county — free — to find the lowest total cost and set up the monthly payment plan if it helps. No pressure, no fee.

Or run the 90-second quote

Sources: Medicare.gov (2026 Part D costs, Medicare Prescription Payment Plan) · CMS 2026 Part D benefit parameters · Inflation Reduction Act Part D redesign. Figures are for the 2026 plan year and may change. Giron Agency LLC is a licensed insurance agency in Texas and Florida and is not connected with or endorsed by the U.S. government or the federal Medicare program.