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Medicare Part D
Prescription Drug Coverage 2027
Medicare Prescription Payment Plan 2027: How the Monthly Bills Are Figured
Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated October 30, 2026
The Medicare Prescription Payment Plan lets you pay your 2027 Part D drug costs in monthly bills from your plan instead of all at once at the pharmacy, and the first bill can be no more than $200 if you join in January. It is free and charges no interest, but it does not lower your total cost; you still pay up to the $2,400 yearly cap, just spread out.
2027 by the Numbers
$200
highest first-month bill if you join in January 2027 ($2,400 / 12, our math from the CMS formula)
$2,400
2027 out-of-pocket cap the bills are based on (CMS)
$600
single-drug cost that triggers a pharmacy notice you may benefit (CMS rule)
2 months
minimum grace period before removal for unpaid bills (CMS rule)
High drug costs tend to land early in the year. With a $700 deductible and a $2,400 cap, someone on an expensive brand drug can owe over $1,000 at the pharmacy in January alone. The Medicare Prescription Payment Plan, which every Part D plan and Medicare Advantage plan with drug coverage must offer, smooths that out into monthly bills.
Below we show exactly how the bills are calculated, with our own month-by-month examples for 2027. For the 2027 cost rules behind these numbers, see our Medicare Part D plans 2027 guide and the Medicare Part D premium 2027 page, since your premium is billed separately.
Key Takeaways
- You pay $0 at the pharmacy for covered drugs and get a monthly bill from your plan instead.
- The 2027 first-month bill is capped at the $2,400 cap minus what you already paid, divided by the months left.
- If you were in the payment plan in 2026 and keep the same Part D plan, you are re-enrolled for 2027 automatically.
- Bills can rise later in the year if you keep filling costly drugs, as our examples show.
- Joining late in the year means fewer months to spread costs, so bills are larger.
What the Payment Plan Changes and What It Does Not
Paying at the counter
✔
You pay your full copay or coinsurance when you pick up the drug
✔
Big bills come in the first months of the year
✔
Costs stop once you reach $2,400
With the payment plan
✔
You pay $0 at the pharmacy for covered Part D drugs
✔
Your plan sends a monthly bill
✔
Same yearly total, spread across the months left in 2027
It is not a loan and not a discount. Medicare’s own guide says it does not save money or lower drug costs. It also covers only drug cost sharing, so your monthly premium is still billed the usual way. People with Extra Help already have low fixed copays, so the payment plan is usually not a good fit for them.
How Your Monthly Bill Is Calculated
CMS sets the formula, and your plan has to follow it. Using the 2027 cap of $2,400, here is how it works.
1
First month: your plan finds the most it can bill you: $2,400 minus what you already paid for covered drugs in 2027, divided by the number of months left in the year, counting the current one. You are billed that amount or your actual costs that month, whichever is less.
2
Every month after: your plan adds any unpaid balance to your new drug costs for the month and divides by the months left, including the current month.
3
After you reach $2,400: new covered drugs cost $0, so your bills just finish paying the balance in equal parts through December.
Our 2027 number: joining in January with no costs yet, the most your first bill can be is $2,400 / 12 = $200. Joining in July after paying $600, it is ($2,400 – $600) / 6 = $300.
Our Math: A $3,000-a-Month Drug, Joining in January
This example uses the standard 2027 design: a $700 deductible, then 25% coinsurance, with the same $3,000 drug filled every month. Without the payment plan, this person pays the whole $2,400 in the first three months.
| Month | Paid at the pharmacy without the plan | Monthly bill with the plan |
|---|---|---|
| January | $1,275.00 | $200.00 |
| February | $750.00 | $165.91 |
| March | $375.00 (cap reached) | $203.41 |
| April to December | $0 | $203.41 each month |
| Total for 2027 | $2,400.00 | $2,400 (rounded) |
Our calculation from the CMS payment plan formula and 2027 standard-benefit parameters. Plans with copays or a lower deductible will differ.
The biggest monthly bill drops from $1,275 to about $203. February is lower than the months after it because the formula looks at that month’s new costs plus the leftover balance, and both are smaller than they will be once the March fill is added.
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When Bills Climb: A $1,000-a-Month Drug
The payment plan does not always produce a flat bill. When drug costs keep coming every month, the balance keeps growing and so do the bills. Here is a $1,000-a-month drug under the same 2027 rules, joining in January.
| Month | Without the plan | With the plan |
|---|---|---|
| January | $775.00 | $200.00 |
| February | $250.00 | $75.00 |
| April | $250.00 | $127.78 |
| June | $250.00 | $194.74 |
| August | $125.00 (cap reached) | $261.41 |
| September to December | $0 | $261.41 each month |
Our calculation; selected months shown. Both columns total $2,400 for 2027.
Plan for the back half: in this example the bill rises from $75 in February to about $261 by August and stays there through December. If your budget is tight late in the year, ask your plan for a projected schedule when you join.
Joining Late in 2027: Why Timing Matters
You can join at any point in the year, but the formula divides by the months left. Here someone with no drug costs starts a $3,000-a-month drug in September and joins the payment plan that month.
$600
September bill: $2,400 / 4 months
$475
October bill
$662.50
November and December bills
Paying at the counter, the same person would owe $1,275 in September, $750 in October and $375 in November. The payment plan still helps, but much less than in January. Medicare notes the option is less likely to help if you join after September.
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Who May Benefit and Who May Not
More likely to help
✔
You take a brand or specialty drug that costs hundreds of dollars or more each month
✔
You expect to reach the $2,400 cap in 2027
✔
You start a costly drug early in the year
✔
Your pharmacy tells you a single drug costs you $600 or more, which triggers a notice that you are likely to benefit
Less likely to help
✔
Your drug costs are low or about the same each month
✔
You get Extra Help with drug costs
✔
You join late in the year with few months left
✔
You would rather not track a separate monthly bill
Rules on Joining, Paying and Leaving
1
Join through your plan. Call your Part D plan or Medicare Advantage plan, or use its website or form. During the year, plans must process a complete request within 24 hours.
2
Pay your monthly bill. There are no fees or interest. If you miss a payment, the plan must give you a grace period of at least two months before ending your participation.
3
Know the catch. If you are removed for not paying, you still owe the balance, and that same company may refuse to let you rejoin its payment plan the next year until it is paid.
4
Leave any time. You can opt out by contacting your plan. You will still owe the remaining balance, and from then on you pay the pharmacy directly.
5
Renewal. If you used it in 2026 and stay in the same plan, you are re-enrolled for 2027 automatically. If you switch plans, you must sign up again with the new plan.
Switching plans is covered on our when can you change Part D plans 2027 page, and the full 2027 cost stages are on our Part D coverage phases 2027 page.
The Bottom Line
The Bottom Line
The Medicare Prescription Payment Plan turns large 2027 pharmacy bills into monthly payments that start at no more than $200 if you join in January, with no interest or fees. It does not lower your yearly total, bills can rise if you keep filling costly drugs, and it helps most when you join early and expect to reach the $2,400 cap.
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 (TTY 1-877-486-2048) to get information on all of your options.
Frequently Asked Questions
➤ What is the Medicare Prescription Payment Plan in 2027?
It is a free option in every Part D plan and Medicare Advantage drug plan that lets you pay your drug costs in monthly bills from your plan instead of at the pharmacy. The 2027 total is still limited by the $2,400 cap.
➤ How much is the first monthly payment?
It is the lower of your actual drug costs that month or the cap minus what you already paid, divided by the months left in 2027. Joining in January with no costs yet, that is at most $200.
➤ Does the payment plan save money?
No. You pay the same total for the year either way. It only changes when you pay, not how much.
➤ Is there interest or a fee?
No. Plans may not charge interest or fees for the payment plan. Your regular premium is still billed separately.
➤ Am I automatically in the payment plan for 2027?
If you were in it in 2026 and stay in the same Part D plan, yes. If you change plans for 2027, you have to opt in again with your new plan.
➤ Can I join in the middle of the year?
Yes, you can join any time during 2027. Joining later means fewer months to spread costs, so each bill is larger.
➤ What happens if I miss a payment?
Your plan sends a notice and must give you a grace period of at least two months. If you still do not pay, you are removed from the payment plan but keep your drug coverage, and you still owe the balance.
➤ Does Extra Help work with the payment plan?
You can ask, but Medicare says it is usually not a good fit if you get Extra Help, because your copays are already low.
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