Medicare Part D Costs and the Yearly Out-of-Pocket Cap
What Medicare drug coverage can cost you in a year, now that there is a hard ceiling on it. The cap, the most a plan may charge as a deductible, and the national figure that quietly sets the late-enrollment penalty, each taken from the CMS notice that published it. No plan is named or priced.
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There is now a hard ceiling on what you can pay in a year
Once your out-of-pocket spending on covered drugs reaches $2,100 in 2026, you pay nothing more for them for the rest of the year. For most of Part D’s existence there was no ceiling at all: past the catastrophic threshold you paid a percentage, with no limit, indefinitely.
This is the largest change to Medicare drug coverage in twenty years, and the people it helps most — anyone on an expensive specialty drug — are often the last to hear about it. If you have ever stopped filling a prescription because of what it cost in December, this is the figure to check.
The yearly out-of-pocket cap
$2,100
- Applies to
- Covered drugs
A hard ceiling. After it, covered drugs cost you nothing for the rest of the calendar year. It resets on January 1. Premiums do not count toward it — this is what you pay at the counter.The most a plan may charge as a deductible
$615
- Set by
- CMS, annually
A ceiling, not a price. A plan may set a lower deductible or none at all, and many do. No plan may charge more than this figure.The national base beneficiary premium
$38.99 a month
- What it is used for
- The late enrollment penalty
Not what any plan charges. It is a national reference figure, and the Part D late enrollment penalty is one percent of it for each uncovered month — which is why an unchanged penalty costs a different amount every year.What your own plan costs
We do not hold that figure
- Where to find it
- Medicare Plan Finder
Plan premiums are set by insurers and depend on where you live and which drugs you take. We name no insurer and take no money from one, so the only sensible place to compare is Medicare’s own tool with your prescriptions entered.
Two things the cap does not do
It does not cap your premiums — those are separate and continue all year. And it applies to covered drugs: a drug that is not on your plan’s formulary at all does not count toward the cap, because from the plan’s point of view you are not buying a covered drug. Checking that your prescriptions are on the list is the single most useful thing to do each autumn.
If the cost is still the problem
Extra Help — the Part D Low-Income Subsidy — sharply reduces drug costs for people who qualify, and take-up is low mostly because people assume they earn too much. The income and asset limits are higher than most expect and applying is free. See the limits and a screener that keeps nothing.Where to take a plan question
We take no money from any insurer and name none, so we are not the place to settle what you buy. These three are, and all of them are free.
Verified 2026-08-02 against CMS, "Annual Release of Part D National Average Monthly Bid Amount and Other Part C & D Bid Information" (July 28, 2025) for the national base beneficiary premium; CMS, "Final CY 2026 Part D Redesign Program Instructions" (https://www.cms.gov/files/document/final-cy-2026-part-d-redesign-program-instruction.pdf) for the defined-standard deductible and the annual out-of-pocket threshold (effective 2026-01-01)
Estimate only — not financial, tax, legal, or insurance advice. Only MEDICARE can determine your actual amounts.
Official source: Medicare.gov — Costs for Medicare drug coverage ↗
🎓 Understand this tool
What it is
The three published figures that bound what Medicare drug coverage can cost you: the yearly out-of-pocket cap, the most a plan may charge as a deductible, and the national base beneficiary premium that sets the late-enrollment penalty.
How it works
All three come from the annual CMS parameters notice and are transcribed rather than computed, with the date we last checked them printed beside them. What is deliberately absent is any plan's own premium: those are set by insurers, vary by state, and are not ours to quote.
Getting the most from it
- Read the cap first. It is the figure that changes what a bad year can cost, and it is the one least likely to be known.
- Check that your prescriptions are actually on your plan's formulary. Spending on a drug the plan does not cover does not count toward the cap.
- Treat the deductible figure as a ceiling rather than a price — many plans charge less, and some charge nothing.
- If you are working out a late-enrollment penalty, use the national base premium here rather than your own plan's price. The penalty is a percentage of the national figure.
- Compare actual plans on Medicare's own Plan Finder with your drug list entered. That is the only comparison that reflects what you would really pay.
Reading your result
These are ceilings and reference figures, not a bill. What you actually pay depends on your plan's premium and formulary and on which drugs you take — but the cap means the worst case now has a number, which it did not use to.
What it can't tell you
It cannot tell you what any plan costs where you live, cannot price your prescriptions, and cannot tell you whether a drug is on a formulary. It also does not cover Part B drugs — those administered in a clinic — which are billed under a different part of Medicare with different rules.
Frequently asked questions
Yes, and this is new. Once your out-of-pocket spending on covered drugs reaches the annual cap, you pay nothing more for them for the rest of the calendar year. For most of Part D's existence there was no ceiling at all — past the catastrophic threshold you paid a percentage, with no limit. The figure on this page is the cap for the current year.
Related calculators
Late Penalty Calculator
Sign up for Medicare Part B or Part D late and the surcharge is permanent. Enter how many months you went without each kind of coverage to estimate what the penalty adds every month, every year, and over a horizon you choose. Part B counts full twelve-month periods only, so partial years cost nothing.
Total Cost Estimator
Nobody publishes one number for what a year of Medicare costs a household, because the pieces live in separate documents. This estimator adds them: the Part B premium, any IRMAA surcharge, deductibles, and the drug or supplement premium you supply. Original Medicare and Advantage are shown as two shapes of cost, without a verdict.
Savings Programs
Four programs pay the Medicare premiums of people with limited income, and a fifth pays most drug costs. Answer two questions to see where your figures sit against the federal limits for QMB, SLMB, QI and QDWI, plus Part D Extra Help. Those federal numbers are a floor many states exceed, so this is an estimate, never a decision.
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