The 2027 Medicare Prescription Payment Plan: Spreading a $2,400 Drug Cap Into Monthly Bills
By YourResourceHub Editorial Team · Reviewed by Steven Sun · 7 min read · Last updated September 29, 2026
- Starting in 2027, Medicare Part D’s annual out-of-pocket cap for covered drugs rises to $2,400, up from $2,100 in 2026, per the Centers for Medicare & Medicaid Services (CMS) 2027 Rate Announcement.
- The Medicare Prescription Payment Plan lets anyone with Medicare drug coverage pay that annual cap in monthly installments billed by their plan, instead of all at once at the pharmacy. There is no interest, no fee, and no income test.
- Since a 2025 rule change, your enrollment in the payment plan now renews automatically every year unless you opt out. You do not need to re-enroll each Annual Enrollment Period.
- The plan does not lower your drug costs. If you already receive Extra Help or a Medicare Savings Program, or your drug costs are steady all year, it usually is not worth signing up for.
The Medicare Prescription Payment Plan lets anyone with Medicare drug coverage spread their yearly out-of-pocket drug costs, capped at $2,400 in 2027, into monthly bills from their plan instead of paying the full amount at the pharmacy, at no extra cost. It works best only if you sign up before large drug costs hit early in the year.
In this article
- How the payment plan actually works
- The 2027 numbers, and why enrollment timing matters
- How to sign up during Open Enrollment
- What people get wrong
- Frequently asked questions
In January 2027, a single specialty-drug refill left Arlene Bishop, 71, owing her pharmacy $2,400, her entire year’s Part D out-of-pocket cap, before her first cost-of-living-adjusted Social Security check of the year had even arrived. She had never heard of a way to avoid paying it all at once.
How the payment plan actually works
The Medicare Prescription Payment Plan is a billing option, not a discount. Any Medicare drug plan or Medicare health plan with drug coverage is required to offer it, and joining is voluntary. Once you opt in, you stop paying the pharmacy directly for covered Part D drugs. Instead, your plan sends you a monthly bill, separate from your premium bill if you have one, for what you would have paid at the counter.
Medicare.gov, the federal government’s official Medicare site, describes the monthly bill formula this way: what you would have paid out of pocket that month, plus any balance carried over from the previous month, divided by the number of months left in the calendar year. Your bill can change every month, because a new prescription adds to what is left to spread out over fewer remaining months.
You will never pay more in total than you would have paid without the plan, and never more than the yearly cap itself. But the plan itself adds no discount. If your drug costs stay the same every month, joining does not lower what you pay all year, it just moves the same total onto a different schedule.
The 2027 numbers, and why enrollment timing matters
CMS finalized the 2027 Part D benefit numbers in its April 2026 Rate Announcement. The standard deductible rises to $700 in 2027, up from $615 in 2026, and the annual out-of-pocket threshold, the point after which covered drugs cost nothing more for the rest of the year, rises to $2,400, up from $2,100. For more on how the current $2,100 cap and the Part D Low-Income Subsidy interact, see our guides to Medicare’s $2,100 Part D out-of-pocket cap and Extra Help eligibility.
Because the monthly bill is your remaining balance divided by the months left in the year, when you enroll changes your payment size dramatically for the exact same $2,400 owed. The table below assumes a single $2,400 drug cost hits in January, with no other prescriptions the rest of the year.
| Month you enroll in the payment plan | Months left in the year | Monthly bill |
|---|---|---|
| January | 12 | $200.00 |
| April | 9 | $266.67 |
| July | 6 | $400.00 |
| September | 4 | $600.00 |
Medicare.gov’s own guidance is direct about this: the plan may not be the best choice if you sign up after September, because there are too few months left to spread a large balance into a manageable bill.
How to sign up during Open Enrollment
You can join the Medicare Prescription Payment Plan at any time of year, including outside the Annual Enrollment Period that runs October 15 through December 7 each fall. But Annual Enrollment is a natural moment to consider it, since it is also when you can compare or switch Part D plans for the coming year.
To sign up, contact your health or drug plan directly, not Medicare itself and not your pharmacy. Once approved, your plan sends a confirmation letter, and from that point your pharmacy is automatically notified each time you fill a covered prescription. You can leave the plan at any time by contacting your plan again; leaving does not affect your other Medicare coverage, though you must still pay off any balance you already owe.
Since a 2025 federal rule change, if you participate one year and take no action, your plan must carry your enrollment forward into the next year automatically, sending you a renewal notice after Annual Enrollment closes and before the new plan year begins. You only need to act if you want to opt out.
What people get wrong
The single biggest misunderstanding is treating the payment plan as a discount program. It is not. Medicare.gov states plainly that it “doesn’t save you money or lower your drug costs.” If your drug costs are already low or flat every month, spreading them out adds complexity with no benefit.
The second mistake is missing a monthly bill. If you do not pay by the date on your plan’s reminder notice, you are removed from the payment plan, though you remain enrolled in your regular drug coverage. You still owe whatever balance remains, without interest or fees, but you lose the ability to spread it out further unless your plan lets you re-enroll.
The third mistake is assuming the plan replaces paying your premium. It does not. Medicare.gov’s own guidance warns to always pay your monthly plan premium first, separately from any Prescription Payment Plan bill, so you do not risk losing your drug coverage entirely over an unrelated missed premium payment.
Frequently asked questions
Do I qualify for the payment plan if I already get Extra Help?
You can still join, but it usually will not help. Extra Help already caps your drug costs well below the $2,400 threshold, so there is little or nothing left to spread out. Check with your plan before signing up.
What happens if I miss a monthly bill?
Your plan sends a reminder first. If you still do not pay by the date listed, you are removed from the payment plan, though your regular Medicare drug coverage continues. You still owe the remaining balance, with no interest or fees added.
Does signing up lower what I owe for my drugs?
No. The plan only changes when you pay, not how much you pay. Your total yearly drug cost is exactly the same with or without it, dollar for dollar. If your goal is to spend less on drugs, ask your plan about Extra Help or a Medicare Savings Program instead.
Can I enroll anytime, or only during Open Enrollment?
You can enroll any time of year by contacting your plan directly. Enrolling earlier in the year, ideally before September, gives you more months to spread a large cost into smaller payments.
Will I automatically stay enrolled next year?
Yes, as of a 2025 rule change. If you participated one year and do not opt out, your plan carries your enrollment into the next year automatically and mails you a renewal notice first.
