Medicare Part D covers prescription drugs for anyone enrolled in Medicare. For 2026, several key numbers have changed, including the out-of-pocket cap, the maximum deductible, and Extra Help income limits. If you have not reviewed your drug plan recently, or if you are enrolling in Medicare for the first time, this guide covers everything you need to know about Medicare Part D plans in 2026.
What Is Medicare Part D?
Medicare Part D is optional prescription drug coverage that helps pay for medications you take at home. You can get Part D two ways: as a standalone Prescription Drug Plan (PDP) added to Original Medicare (Parts A and B), or bundled inside a Medicare Advantage plan that includes drug coverage (called MA-PD plans).
Part D plans are sold by private insurance companies approved by Medicare.gov. Each plan has its own formulary, which is a list of covered drugs organized into cost tiers. Premiums, deductibles, and copays vary by plan, though CMS sets annual caps on key cost parameters.
As of 2026, Medicare Part D has a simplified three-phase structure thanks to the Inflation Reduction Act: a deductible phase, an initial coverage phase, and then a catastrophic phase once you hit the annual out-of-pocket cap.
2026 Medicare Part D Key Numbers
| Cost Parameter | 2025 | 2026 | Change |
|---|
| Maximum deductible | $590 | $615 | +$25 |
| Out-of-pocket cap | $2,000 | $2,100 | +$100 |
| Average standalone plan premium | $38.31/month | $34.50/month | -$3.81 |
| Average MA-PD drug premium | $13.32/month | $11.50/month | -$1.82 |
| IRMAA surcharge range | $12.90-$81.00 | $14.50-$91.00 | Varies |
| Extra Help copay (generic) | ~$4.90 | ~$5.10 | +$0.20 |
| Extra Help copay (brand-name) | ~$12.15 | ~$12.65 | +$0.50 |
Source: CMS.gov 2026 Part D Redesign Program Instructions
The 2026 Out-of-Pocket Cap
Starting in 2024, the Inflation Reduction Act eliminated the old "donut hole" and introduced a hard annual cap on what you pay out of pocket for covered drugs. In 2026, that cap is $2,100. Once you spend $2,100 on covered Part D drugs in a plan year, your cost-sharing drops to $0 for the rest of the year.
This is a significant protection for people who take expensive specialty medications or multiple brand-name drugs. Before the IRA, there was no out-of-pocket limit at all in catastrophic coverage.
2026 Deductible
Not all plans charge the maximum deductible. Many plans charge $0 or a reduced deductible, particularly for generic drugs. The maximum allowed for 2026 is $615, up from $590 in 2025. Check your plan's Evidence of Coverage to see what deductible actually applies to your specific drugs.
Premium Costs
The average standalone 2026 Part D premium is $34.50 per month, down from $38.31 in 2025. However, "average" is misleading because plan premiums vary widely by carrier, region, and drug tier structure. Some plans cost under $10/month while others exceed $100/month. Always compare specific plans at medicare.gov/plan-compare based on your actual drug list.
Income-Related Surcharge (IRMAA) for Part D in 2026
Higher-income enrollees pay an extra monthly surcharge on top of their plan premium. This is called the Income-Related Monthly Adjustment Amount (IRMAA). The 2026 IRMAA is based on your 2024 tax return income.
| 2024 Individual MAGI | 2024 Joint MAGI | 2026 Monthly Surcharge |
|---|
| $109,000 or less | $218,000 or less | $0 |
| $109,001 to $137,000 | $218,001 to $274,000 | $14.50 |
| $137,001 to $171,000 | $274,001 to $342,000 | $37.50 |
| $171,001 to $205,000 | $342,001 to $410,000 | $60.40 |
| $205,001 to $500,000 | $410,001 to $750,000 | $83.30 |
| Above $500,000 | Above $750,000 | $91.00 |
Source: CMS.gov
The surcharge is paid separately from your plan premium and is deducted from your Social Security benefit if you receive one.
Extra Help (Low-Income Subsidy) in 2026
Extra Help is a federal program that pays most or all of your Part D costs if your income and resources are below a certain threshold. In 2026, Extra Help income limits are:
| Household | Monthly Income Limit | Annual Income Limit |
|---|
| Individual | $2,015/month | $23,475/year |
| Married couple | $2,725/month | $31,725/year |
Resource (asset) limits for 2026:
| Household | Asset Limit |
|---|
| Individual | $18,090 |
| Married couple | $36,100 |
Countable resources include checking accounts, savings accounts, stocks, and bonds. They do not include your home, one car, or personal belongings.
If you qualify for full Extra Help in 2026, you pay no deductible and limited copays: roughly $5.10 for generics and $12.65 for brand-name drugs. Many people with Extra Help pay $0 in monthly premiums if they enroll in a benchmark plan.
You may qualify for Extra Help automatically if you receive full Medicaid, Supplemental Security Income (SSI), or enroll in a Medicare Savings Program. Otherwise, you apply through the Social Security Administration.
Source: Medicare.gov Extra Help
Who Is Eligible for Medicare Part D in 2026?
To enroll in a Part D plan, you must:
- Be enrolled in Medicare Part A and/or Part B
- Live in the plan's service area
- Be a U.S. citizen or lawfully present in the United States
Medicare eligibility begins at age 65 for people who have worked at least 10 years (40 quarters) in covered employment. You can also qualify before 65 if you have received Social Security Disability Insurance (SSDI) for 24 months, or if you have End-Stage Renal Disease (ESRD) or ALS (amyotrophic lateral sclerosis).
There is no income limit for standard Part D enrollment. Anyone with Medicare can enroll in a Part D plan.
For a full breakdown of Medicare eligibility requirements, see the CoveredUSA Medicare eligibility guide.
How to Enroll in Medicare Part D in 2026
Enrollment Windows
Initial Enrollment Period (IEP): When you first become eligible for Medicare, you have a 7-month window to enroll in Part D without penalty. That window begins 3 months before your 65th birthday month, includes your birthday month, and ends 3 months after.
Annual Election Period (AEP): October 15 through December 7 each year. Changes take effect January 1 of the following year. The 2025 AEP covered changes effective January 2026. The 2026 AEP will run October 15 through December 7, 2026, for coverage starting January 1, 2027.
Medicare Advantage Open Enrollment Period: January 1 through March 31. If you switch from a Medicare Advantage plan back to Original Medicare during this window, you can add a standalone Part D plan.
Special Enrollment Periods (SEPs): Triggered by qualifying life events, including losing other creditable drug coverage, moving out of your plan's service area, or entering a nursing home.
Step-by-Step Enrollment
- Check your current coverage. If you have drug coverage through an employer, retiree plan, or VA, confirm whether it is "creditable" (as good as Medicare Part D). If it is, you can delay Part D without penalty.
- Review your drug list. Write down every medication you take, including dosage and frequency.
- Compare plans at Medicare Plan Finder. Go to medicare.gov/plan-compare, enter your ZIP code, and enter your drug list. The tool shows you the estimated annual cost of each plan based on your specific medications.
- Check network pharmacies. Confirm your preferred pharmacy (or mail-order pharmacy) is in-network with the plan you choose.
- Enroll online, by phone, or through a broker. You can enroll directly at medicare.gov, call 1-800-MEDICARE (1-800-633-4227), or work with a licensed Medicare agent at no cost to you.
- Confirm your enrollment. You will receive a welcome kit from the plan within a few weeks of enrolling.
Documents Needed to Enroll
- Medicare card (your Medicare Beneficiary Identifier, or MBI)
- Current medication list with drug names, dosages, and prescribing physicians
- Current insurance card (if you have other coverage)
- Social Security number
- Bank account information (if setting up automatic premium payment)
Common Reasons Part D Applications Are Delayed or Denied
- Enrolling outside a valid enrollment period
- Not having active Medicare Part A or Part B
- Selecting a plan that does not serve your county or ZIP code
- Providing incorrect Medicare ID or Social Security information
- Missing the Part D late enrollment penalty assessment (which can delay coverage start)
The Late Enrollment Penalty
If you do not sign up for Part D when first eligible and you do not have other creditable drug coverage, you will owe a late enrollment penalty for as long as you have Medicare. The penalty adds 1% of the national base beneficiary premium ($38.99 in 2026) for every full month you went without coverage. That cost is added permanently to your monthly premium.
For example, if you went 24 months without creditable coverage, your penalty would be 24% of $38.99, or about $9.36 extra per month for life.
How to Compare Part D Plans
Not all plans cover the same drugs or charge the same amount. Here is what to compare:
| Factor | What to Look For |
|---|
| Formulary | Does the plan cover your specific drugs? At what tier? |
| Deductible | Does it apply to all drugs or only certain tiers? |
| Copays and coinsurance | What do you pay per fill at each drug tier? |
| Pharmacy network | Is your preferred pharmacy in-network? |
| Mail order | Does the plan offer lower costs for 90-day mail-order supplies? |
| Star rating | CMS rates plans 1 to 5 stars. Aim for 4 stars or higher. |
| Prior authorization rules | Does the plan require approval before covering certain drugs? |
The Medicare Plan Finder at medicare.gov is the most accurate tool because it calculates your estimated total annual cost (premium plus deductible plus estimated copays) based on your actual medications.
Medicare Prescription Payment Plan (2025 and 2026)
Starting in 2025 and continuing in 2026, you can opt into the Medicare Prescription Payment Plan, which spreads your out-of-pocket drug costs into equal monthly installments across the year. Instead of paying large amounts at the pharmacy when you fill expensive prescriptions early in the year, you pay a smaller fixed amount each month. Contact your Part D plan directly to enroll.
Check Your Eligibility in 2 Minutes
If you are not sure whether you qualify for Medicare, Medicaid, Extra Help, or a Medicare Savings Program, the free CoveredUSA screener can give you an answer based on your age, income, and household size. Check your eligibility now at CoveredUSA. It takes 2 minutes.
Check my eligibility at CoveredUSA
Frequently Asked Questions
What is the Medicare Part D deductible for 2026?
The maximum Part D deductible in 2026 is $615. Many plans charge less or waive the deductible for generic drugs. The actual deductible you pay depends on the specific plan you choose, not the CMS maximum.
What is the out-of-pocket maximum for Medicare Part D in 2026?
The 2026 out-of-pocket cap is $2,100. Once you reach that amount in covered drug costs, your cost-sharing drops to $0 for the rest of the year.
How much does Medicare Part D cost per month in 2026?
The average standalone Part D premium is $34.50/month in 2026. Actual costs range from under $10 to over $100 depending on the plan, your drugs, and your location. Higher-income enrollees also pay an IRMAA surcharge of $14.50 to $91.00 per month on top of the plan premium.
Who qualifies for Extra Help with Part D in 2026?
You may qualify if your 2026 annual income is $23,475 or less as an individual, or $31,725 or less as a married couple. Asset limits are $18,090 for individuals and $36,100 for couples. If you receive full Medicaid or SSI, you are automatically eligible for Extra Help.
When can I enroll in Medicare Part D in 2026?
The main enrollment window is the Annual Election Period: October 15 through December 7. For changes effective January 2026, that window was October 15 through December 7, 2025. If you are newly eligible for Medicare, you have a 7-month Initial Enrollment Period centered on your 65th birthday.
Will I be penalized for not having Part D?
Yes. If you go more than 63 days without creditable drug coverage after your Initial Enrollment Period ends, you will owe a late enrollment penalty permanently added to your monthly premium. The penalty equals 1% of the national base rate ($38.99 in 2026) for each month without coverage.
Can I switch Part D plans every year?
Yes. During the Annual Election Period (October 15 through December 7), you can switch to any Part D plan in your area, regardless of what plan you currently have. Changes take effect January 1.
How do I find out if my drugs are covered?
Enter your medications into the Medicare Plan Finder at medicare.gov/plan-compare. It will show you which plans cover your specific drugs, at what tier, and what your estimated annual cost would be.
