Medicare Part D prescription drug coverage carries several cost layers in 2026, and understanding each one can save you hundreds of dollars per year. The biggest change in 2026 is a hard $2,100 out-of-pocket cap on covered drug costs, meaning your plan picks up 100% of covered prescription expenses once you hit that limit. Here is a full breakdown of what you will pay, what changed, and how to reduce your costs.
What Medicare Part D Costs in 2026
Premiums
The average estimated monthly Part D plan premium in 2026 is $34.50. That figure is an average across all available plans. Individual plan premiums vary widely depending on the insurer, your location, and the formulary (list of covered drugs). Some plans offer premiums below $10 per month, while others exceed $100.
You pay your Part D premium in addition to your Part B premium of $202.90 per month. If you have a Medicare Advantage plan that includes drug coverage, your prescription costs are bundled into a single premium.
Deductible
The maximum annual deductible a Part D plan can charge in 2026 is $615. Not all plans charge the full deductible. Many plans offer a $0 deductible on certain drug tiers, particularly generics, while applying the full deductible to brand-name medications. Some plans waive the deductible entirely.
You pay 100% of drug costs out of pocket until you meet your deductible, unless your plan waives it for specific tiers.
Copays and Coinsurance
After your deductible, you share costs with your plan through copays or coinsurance:
| Drug Tier | Typical Copay Example |
|---|
| Tier 1: Generic drugs | $5 per prescription |
| Tier 2: Preferred brand-name | $25 per prescription |
| Tier 3: Non-preferred brand-name | $40 per prescription |
| Tier 4: Specialty drugs | 25% to 33% coinsurance |
These amounts are illustrative. Your actual plan may use a different tier structure or cost-sharing arrangement. Always review the Summary of Benefits for any plan you are considering during Open Enrollment.
Out-of-Pocket Maximum
The most significant 2026 update is the $2,100 annual out-of-pocket cap. Once your total covered drug costs reach $2,100 for the year, your plan covers 100% of additional covered prescription drug costs through December 31. This cap replaced the old "donut hole" or coverage gap structure that left many beneficiaries paying 25% coinsurance on their own.
What counts toward the $2,100 cap:
- Your deductible payments
- Copays and coinsurance during the initial coverage period
- Costs paid by Extra Help or other assistance programs (in some cases)
What does NOT count:
- Premiums
- Costs for drugs not on your plan's formulary
- Costs for drugs purchased outside your plan's network pharmacy
Medicare Part D Coverage Phases in 2026
Understanding the three phases helps you predict your costs across the year:
Phase 1: Deductible Period
You pay 100% of drug costs until your deductible is met (up to $615). Plans with $0 deductibles skip this phase for some or all drug tiers.
Phase 2: Initial Coverage Period
You pay copays or coinsurance on covered drugs. Your plan pays the rest. This continues until your total out-of-pocket spending reaches $2,100.
Phase 3: Catastrophic Coverage
Once you reach the $2,100 out-of-pocket limit, your plan pays 100% of covered drug costs for the remainder of the calendar year. This is the major 2026 improvement from prior years.
IRMAA: Higher-Income Surcharges for Part D
If your income exceeds certain thresholds, you pay an additional monthly surcharge on top of your Part D plan premium. This is called the Income-Related Monthly Adjustment Amount (IRMAA). The 2026 surcharges are based on your 2024 Modified Adjusted Gross Income (MAGI).
Part D IRMAA Surcharges for Single Filers (2026)
| 2024 MAGI (Single) | Monthly Part D Surcharge |
|---|
| $109,000 or below | $0 |
| $109,001 to $137,000 | $14.50 |
| $137,001 to $171,000 | $37.50 |
| $171,001 to $205,000 | $60.40 |
| $205,001 to $499,999 | $83.30 |
| $500,000 or above | $91.00 |
Part D IRMAA Surcharges for Married Filing Jointly (2026)
| 2024 MAGI (Joint) | Monthly Part D Surcharge |
|---|
| $218,000 or below | $0 |
| $218,001 to $274,000 | $14.50 |
| $274,001 to $342,000 | $37.50 |
| $342,001 to $410,000 | $60.40 |
| $410,001 to $749,999 | $83.30 |
| $750,000 or above | $91.00 |
The IRMAA surcharge is billed separately by Medicare, not added to your plan premium. It is deducted directly from your Social Security check if you receive one. Note that IRMAA operates as a "cliff" system: exceeding a threshold by even $1 triggers the full surcharge for that tier.
If your income has dropped significantly since 2024 (due to retirement, job loss, or another life event), you can file a reconsideration request with the Social Security Administration using Form SSA-44 to potentially reduce or eliminate your surcharge.
Extra Help: Lower Part D Costs for Low-Income Beneficiaries
Medicare's Extra Help program (also called the Low-Income Subsidy, or LIS) dramatically reduces Part D costs for eligible enrollees. In 2026, Extra Help is available to people with income up to 150% of the Federal Poverty Level (FPL).
2026 Extra Help Income Limits
| Household Size | Annual Income Limit (Approx. 150% FPL) |
|---|
| Individual | $23,475 |
| Married couple | $31,725 |
2026 Extra Help Resource Limits
| Status | Resource Limit |
|---|
| Individual | $18,090 |
| Married couple | $36,100 |
Resources include bank accounts, stocks, and bonds. They do not include your home, one car, life insurance, or personal belongings.
What Extra Help Covers
Full Extra Help beneficiaries pay dramatically reduced Part D costs:
- Premium: $0 or a very low premium (plan assigned by Medicare if needed)
- Deductible: $0
- Copays: $4.90 for generic drugs, $12.15 for brand-name drugs (2026 figures, approximately)
- Out-of-pocket maximum: Not applicable once full subsidy applies
Who Qualifies Automatically
You qualify automatically for Extra Help (and receive a letter from Medicare) if you:
- Receive full Medicaid coverage
- Receive Supplemental Security Income (SSI)
- Live in a Medicaid-covered nursing home or other long-term care facility
If you do not qualify automatically but think you are within the income and resource limits, you can apply through the Social Security Administration at SSA.gov or by calling 1-800-772-1213.
Medicare Savings Programs and Part D Costs
Medicare Savings Programs (MSPs) are state-administered programs that help pay Medicare costs including Part B premiums. Enrolling in an MSP often automatically enrolls you in Extra Help for Part D as well. There are four MSP levels:
| Program | Helps Pay | Income Limit (Approx.) |
|---|
| Qualified Medicare Beneficiary (QMB) | Part A and B premiums, deductibles, and copays | Up to 100% FPL |
| Specified Low-Income Medicare Beneficiary (SLMB) | Part B premium only | 100% to 120% FPL |
| Qualifying Individual (QI) | Part B premium only | 120% to 135% FPL |
| Qualified Disabled and Working Individuals (QDWI) | Part A premium only | Up to 200% FPL |
If you enroll in QMB, SLMB, or QI, you are automatically enrolled in Extra Help for Part D. This can save thousands of dollars annually on prescription drugs.
To apply for a Medicare Savings Program, contact your state Medicaid office. Income limits vary slightly by state.
How to Compare Part D Plans and Reduce Costs
Use Medicare's Plan Finder
Medicare's official Plan Finder at Medicare.gov allows you to enter your medications and compare plans based on your actual drug costs. The tool shows your estimated total annual cost for each plan, including premiums, deductibles, and copays for your specific prescriptions.
Check the Formulary Before You Enroll
Each Part D plan maintains a formulary, a list of covered drugs. If a drug you take is not on a plan's formulary, you will pay full retail price. Before enrolling in any plan, confirm your prescriptions are covered at a favorable tier.
Request an Exception or Prior Authorization
If your medication is on a higher tier than expected, or requires prior authorization, you can ask your plan for an exception or have your doctor provide a letter of medical necessity. Plans are required to respond to standard exception requests within 72 hours.
Use a Preferred Pharmacy
Most Part D plans have a network of preferred pharmacies where your copays are lower. Using a non-preferred pharmacy can increase your out-of-pocket costs significantly.
Consider 90-Day Supply Fills
Filling a 90-day supply at a mail-order or preferred pharmacy often reduces the per-dose cost compared to monthly fills.
Open Enrollment and When You Can Change Plans
Medicare Part D Open Enrollment runs from October 15 to December 7 each year. Changes made during this period take effect January 1 of the following year. Outside of Open Enrollment, you can only change plans if you qualify for a Special Enrollment Period, such as moving, losing other drug coverage, or gaining Extra Help eligibility.
If you do not enroll in Part D when you are first eligible and do not have other creditable prescription drug coverage, you may owe a late enrollment penalty. The penalty is 1% of the national base beneficiary premium for each full month you went without coverage. In 2026, the national base beneficiary premium used for this calculation is approximately $36.78 per month.
Check Your Eligibility for Savings
If your income is near the thresholds above, it is worth checking whether you qualify for Extra Help or a Medicare Savings Program. These programs can cut your annual prescription drug costs by hundreds or even thousands of dollars.
Use our free benefits screener at benefitsusa.org/screener to see which programs you may qualify for based on your income, household size, and state.
Frequently Asked Questions
What is the Medicare Part D premium for 2026?
The average estimated monthly Part D premium in 2026 is $34.50. Individual plan premiums vary widely. Some plans are under $10 per month, while others exceed $100. You choose your own plan during Open Enrollment, so comparing options annually is worth the time.
What is the Part D deductible in 2026?
The maximum deductible any Part D plan can charge in 2026 is $615. Many plans charge less or waive the deductible for certain drug tiers. Plans are not required to charge any deductible.
Is there an out-of-pocket maximum for Part D in 2026?
Yes. In 2026, the out-of-pocket cap for covered Part D drug costs is $2,100. Once you hit this limit, your plan pays 100% of covered drug costs for the rest of the year. This cap is a major improvement over prior years.
Who qualifies for Extra Help on Medicare Part D?
Extra Help is available to Medicare beneficiaries with income up to approximately $23,475 per year for an individual (around 150% of the Federal Poverty Level) and resources under $18,090. Married couples have higher limits. If you receive Medicaid or SSI, you likely qualify automatically.
Do higher-income Medicare beneficiaries pay more for Part D?
Yes. If your 2024 income exceeded $109,000 as a single filer (or $218,000 jointly), you pay a monthly IRMAA surcharge on top of your plan premium. The surcharge ranges from $14.50 to $91.00 per month in 2026.
Can I change my Part D plan outside of Open Enrollment?
Generally no, unless you qualify for a Special Enrollment Period. Qualifying events include moving out of your plan's service area, losing other creditable drug coverage, or becoming eligible for Extra Help. Open Enrollment runs October 15 through December 7 each year.
What happens if I do not enroll in Part D when I am first eligible?
If you go without Part D coverage or other creditable drug coverage for 63 or more consecutive days after your Initial Enrollment Period, you may owe a late enrollment penalty. The penalty adds 1% of the national base beneficiary premium for each month you delayed, and it is added to your premium permanently.
How do Medicare Savings Programs affect my Part D costs?
Enrolling in most Medicare Savings Programs (QMB, SLMB, or QI) automatically qualifies you for Extra Help on Part D. This can eliminate your deductible, lower your copays to single-digit amounts, and reduce or eliminate your plan premium.
