Medicare & Insurance

Medicare Part D in 2027: Drug Cost Cap and Monthly Payment Plan

By Camille Laurent / November 11, 2026

A woman with glasses talks with a pharmacist in a pharmacy while looking at a small product.

Medicare drug plans (Part D) have a yearly limit on what you pay out of your own pocket for covered prescriptions. Medicare.gov lists that limit as $2,100 in 2026 and $2,400 in 2027. A separate option, the Medicare Prescription Payment Plan, lets you pay your drug costs in monthly bills instead of at the pharmacy counter. It does not lower what you owe, but it can make a large month easier to handle. Open Enrollment ends on December 7, so this guide explains both ideas in plain steps and lists what to ask before the window closes.

Key takeaways

The yearly out-of-pocket limit for covered Part D drugs is $2,100 in 2026 and $2,400 in 2027. After you reach it, you pay nothing for covered drugs for the rest of that calendar year.
No drug plan may charge a deductible above $615 in 2026 or $700 in 2027. Some plans charge none.
The Medicare Prescription Payment Plan is voluntary, free to join, and offered by all plans. Medicare.gov says it does not save you money or lower your drug costs.
It tends to help people with high drug costs early in the year. People with steady, low costs, or who joined late in the year, usually gain little.
Open Enrollment runs from October 15 through December 7. Changes made then start on January 1.

The yearly limit on what you pay

Part D is the part of Medicare that helps pay for prescription drugs. You can get it as a stand-alone plan alongside Original Medicare, or inside a Medicare Advantage plan that includes drug coverage. Either way, the same basic rules apply, which Medicare.gov describes in three steps.

Deductible. This is an amount you pay first, before the plan begins sharing costs. No plan may set it above $615 in 2026 or $700 in 2027.
Initial coverage. After the deductible, you pay 25 percent of the cost of each covered drug. This continues until your out-of-pocket spending reaches $2,100 in 2026 or $2,400 in 2027.
Catastrophic coverage. Once you reach that limit, you move into this stage automatically. You pay $0 for covered Part D drugs for the rest of the calendar year.

Medicare.gov notes that payments made on your behalf, such as through the Extra Help program, count toward the limit. Only covered drugs count, so a medicine your plan does not cover will not move you toward the cap. Premiums, which are the monthly fee for the plan itself, are separate from this limit.

The figures side by side

Item	2026	2027
Highest deductible any plan may charge	$615	$700
Your share after the deductible	25 percent	25 percent
Yearly out-of-pocket limit	$2,100	$2,400
Cost once you reach the limit	$0 for covered drugs	$0 for covered drugs

Many plans charge less than these maximums. Your own plan sets its actual deductible and its cost for each drug, so look at your plan’s details rather than the table alone.

What the Medicare Prescription Payment Plan is

Normally you pay your share when you pick up a prescription. With the payment plan, you do not pay at the pharmacy for covered drugs. Instead, your health or drug plan sends you a bill each month. Your regular monthly premium, if you have one, is billed separately.

Medicare.gov states the key facts clearly:

It is voluntary, and every Medicare drug plan offers it.
It costs nothing to join.
It “doesn’t save you money or lower your drug costs,” in Medicare’s own words. You still owe the same total.
In a calendar year, you will never pay more than you would have paid at the pharmacy, and never more than the yearly limit.

How the monthly bill is figured

Medicare.gov says every plan uses the same formula. Your bill equals what you would have paid for prescriptions that month, plus any balance carried over from earlier months, divided by the number of months left in the year. Because fewer months remain as the year goes on, a new or refilled prescription late in the year can raise your bill sharply.

Medicare gives three worked examples, all using 2026 figures. In the first, a person joins in January with costs of $525 a month. Payments are $175 in January, then $79.55 and $132.05, then $190.38 a month from April through December, for a total of $2,100. In the second, a person with steady $80 monthly costs starts at $80, drops to $7.27 in February, and pays $241.53 by December. The total is $960, the same as without the plan. The second example shows why steady costs gain little: the bill moves around, but the total does not change.

Who may benefit, and who may not

Medicare.gov describes the people who might find the payment plan useful, and the people who likely will not.

May be helpful	Probably not helpful
You expect high drug costs early in the year, such as a costly new medicine in January	Your yearly drug costs are low, or about the same every month
You can only take a needed drug if the cost is spread out, and your plan covers it	You would sign up after September, when few months are left to spread costs
You want one predictable monthly bill instead of pharmacy payments	You do not want to change how you pay for drugs
You have a gap you would like help planning for, and your plan can explain the monthly bills	You get or qualify for Extra Help, a Medicare Savings Program, a State Pharmaceutical Assistance Program, a coupon program or other coverage

If you are unsure which column fits you, Medicare.gov offers a short questionnaire called “Will this payment option help me.” A State Health Insurance Assistance Program (SHIP) counselor, described as a trusted and unbiased source of one-on-one Medicare help, can also go over your situation.

How to opt in, and what to expect

You do not sign up through Medicare.gov. You contact your own health or drug plan, through its website or by phone. Here is the order of events Medicare describes.

Ask your plan to enroll you in the payment option.
The plan reviews your request and mails a letter confirming that you are in. The letter also explains how to pay your bills.
Your plan notifies your pharmacy automatically, so you do not pay for covered drugs at the counter.
Each month you receive a bill showing what you owe, the due date and how to pay.

If you miss a payment or want to leave

Medicare.gov says you will get a reminder if you miss a payment. If you still do not pay by the date in the reminder, you are removed from the payment option. You still owe the balance. The page states there is no interest or fee, and you may pay it all at once or in monthly bills. You stay in your Medicare plan. It also advises paying your plan premium first, so you do not lose drug coverage.

You may leave at any time by contacting your plan. Your drug coverage and other benefits are not affected, but you must pay any balance you owe, and you will pay the pharmacy directly from then on.

A key point for Open Enrollment

If you switch to a different drug plan, or to a Medicare Advantage plan with drug coverage, your participation ends. You would need to sign up again with the new plan. Medicare.gov also says its examples and pages describe 2026 figures, and its payment plan overview does not list 2027 details, so ask your plan how the option will work for 2027.

Open Enrollment: what you can do by December 7

Open Enrollment runs from October 15 through December 7. Your plan must receive your request by December 7, and any change you make starts January 1 of the next year. During this period you can:

Join, drop or switch a Medicare drug plan, if you have Original Medicare.
Join, drop or switch a Medicare Advantage plan, or add or remove its drug coverage.
Move from Original Medicare to Medicare Advantage, or the other way around.

Medicare.gov’s Open Enrollment page does not say what happens if you do nothing, so check with your plan about what will carry over into 2027.

Questions to ask before December 7

Use this list when you call your plan, a SHIP counselor or 1-800-MEDICARE. Write down the answers and the name of the person who gave them.

Are all my medicines on my plan’s list of covered drugs for 2027?
What is my plan’s deductible for 2027, and does it apply to my drugs?
What will I pay for each of my prescriptions in the first months of the year?
Are my pharmacy and my mail-order option still in the plan’s network for 2027?
Would the payment plan make sense for me, given when my costs usually come?
If I switch plans, how do I sign up for the payment option again with the new plan?
Do I qualify for Extra Help or another program that lowers my costs?

Frequently asked questions

Does the payment plan reduce what I owe?

No. Medicare.gov says it does not save you money or lower your drug costs. It only spreads the same costs over the months left in the year.

Can I join in the middle of the year?

Yes. You may contact your plan to start at any time during the calendar year. Medicare.gov cautions that signing up after September leaves few months to spread the costs.

What if I switch plans?

Medicare.gov says that switching drug plans ends your participation, so you must sign up again with the new plan. Ask the new plan how to do that when you enroll.

Will I pay more than the yearly limit?

No. Medicare.gov says that in a calendar year you will not pay more than the out-of-pocket maximum for covered drugs, which was $2,100 in 2026 and is $2,400 in 2027.

Before you decide

The yearly limit protects you from the highest drug bills, and the payment plan can smooth out a costly month. Neither one replaces a careful look at whether your plan covers your medicines at a fair price. With Open Enrollment closing on December 7, a call to a SHIP counselor is a good first step. You can find yours at shiphelp.org. For questions about Medicare itself, call 1-800-MEDICARE (1-800-633-4227), which Medicare lists as open 24 hours a day, 7 days a week, except some federal holidays. TTY users can call 1-877-486-2048.