If you take prescription medications on Medicare, 2027 brings another significant change worth paying attention to: a hard $2,400 out-of-pocket cap on Part D drug costs. For anyone on regular prescriptions, this number could mean real savings — and it shifts how you should think about your coverage.
Here’s how the 2027 Part D $2,400 out-of-pocket cap works, what counts toward it, and what to check before your next enrollment window.
What the $2,400 Cap Means
The Inflation Reduction Act introduced a yearly out-of-pocket maximum for Medicare Part D starting in 2025. For 2027, that cap is set at $2,400 — meaning once your out-of-pocket spending on covered Part D prescriptions reaches $2,400 in a calendar year, you pay nothing for covered drugs the rest of the year.
This applies to what YOU spend. The cap includes:
- Your deductible payments
- Copayments and coinsurance during the initial coverage phase
- Any costs you pay after reaching the deductible but before hitting the cap
What it does not include: your monthly Part D premium, or the cost of drugs your plan doesn’t cover. It also excludes what the drug manufacturer or your plan pays on your behalf — only your own out-of-pocket dollars count.
How the Coverage Phases Work in 2027
Part D still moves through phases, but the cap simplifies things considerably once your spending crosses the threshold:
-
Deductible phase. You pay full cost for prescriptions until you meet your plan’s deductible. For 2027, the standard Part D deductible is $700, though some plans set lower deductibles — or waive them entirely for certain drug tiers.
-
Initial coverage phase. After the deductible, you and your plan share costs. You pay copays or coinsurance; your plan covers the rest.
-
Catastrophic phase — eliminated. Starting in 2025, the coverage gap (the “donut hole”) was eliminated, and the catastrophic phase was replaced by the out-of-pocket cap. Once your spending hits $2,400, you’re done for the year.
This is a significant departure from earlier years when Medicare beneficiaries could face unlimited drug costs. If you’re new to Part D or haven’t reviewed your plan recently, this change alone may alter which plan makes the most sense for 2027. We have a straightforward overview of Parts A through D if you want a refresher on how everything fits together.
Who Benefits Most
The $2,400 cap matters most if you take high-cost medications — specialty drugs, brand-name prescriptions with no generic alternative, or multiple daily medications that add up month after month. Under the old system, someone on a $600-a-month specialty drug could easily spend $4,000 or more out of pocket in a year. With the $2,400 cap, that same person hits the ceiling by April and pays nothing for covered drugs the remaining eight months.
Even if your medication costs are more moderate, the cap provides a predictable ceiling — something that never existed in Part D before.
Three Steps to Take Right Now
Check your current plan’s deductible and formulary. Not every Part D plan is built the same way. A plan with a $0 deductible on Tier 1 generics may serve you better than one with a $700 deductible across the board — especially if most of your medications are affordable generics. Pull up your plan’s formulary and confirm your drugs are covered.
Estimate your annual out-of-pocket costs. List your regular prescriptions, their monthly costs under your plan, and multiply by 12. If that number is close to or over $2,400, the cap will help you — but you should still compare plans to minimize what you spend before hitting it.
Don’t skip the enrollment window. Medicare’s Annual Enrollment Period (October 15 through December 7) is your opportunity to switch Part D plans for the following year. We’ve written about how Medicare enrollment periods work — including what you can and cannot change during each one.
Where Medigap Fits In
The Part D cap covers drug costs only. It doesn’t touch your medical deductibles, copays, or the 20% coinsurance that Original Medicare leaves on the table. That’s where a Medicare Supplement (Medigap) plan enters the picture — it can help cover those gaps so your total healthcare spending becomes more predictable across the board.
If you’re evaluating your drug coverage, it’s a good time to look at your medical coverage too. The two work together, and the right combination can mean fewer surprises in any calendar year.
The Short Version
The 2027 Part D $2,400 out-of-pocket cap means your annual drug spending has a ceiling. Once you hit it, covered prescriptions cost you nothing for the rest of the year. It’s a real protection that didn’t exist a few years ago — and it’s worth factoring into your plan review.
If you’d like help comparing Part D plans or reviewing your overall Medicare coverage, reach out to a licensed agent at Trek. We can walk through your medications, your current plan, and your options — at no cost to you.
Contact us at 888-960-0442 or visit trekis.net to schedule a Medicare review.
Trek Insurance Solutions is a Third-Party Marketing Organization (TPMO). We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.