Medicare Donut Hole / Coverage Gap Calculator 2026
Figures last verified against official sources in July 2026.
Quick Answer
Under the Inflation Reduction Act, out-of-pocket spending for Medicare Part D prescription drugs is capped at $2,000 in 2026. Once your true out-of-pocket drug spend reaches $2,000, you enter catastrophic coverage and pay $0 for all covered Part D medications for the rest of the year.
Seniors taking brand-name medications often worry about hitting the infamous "donut hole" coverage gap and facing unexpected pharmacy bills. We built this calculator to help Medicare beneficiaries track their exact progress toward the new 2026 $2,000 federal out-of-pocket cap — without needing to create an account or provide personal data.
- Medicare beneficiaries taking brand-name or high-cost specialty drugs who want to track their out-of-pocket progress.
- Retirees wanting to calculate how many months until their prescription copays drop to $0 under 2026 rules.
- Adult children helping parents understand the new Inflation Reduction Act $2,000 Part D cap.
Medicare Donut Hole / Coverage Gap Calculator 2026
Track your progress toward the 2026 $2,000 Part D out-of-pocket cap under Inflation Reduction Act rules.
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How to Use This Calculator — Step by Step
- Find your TrOOP spend on your Explanation of Benefits (EOB). Look at your latest monthly Part D EOB statement for "True Out-of-Pocket" (TrOOP) spending.
- Enter your YTD out-of-pocket spend. Enter the dollar amount in the calculator above.
- Enter your estimated monthly drug costs. Enter what you currently spend out-of-pocket each month at the pharmacy counter.
- Click "Calculate Coverage Gap Status." Read your status to see how close you are to the $2,000 cap and $0 copay phase.
💡 Pro Tip
If high upfront drug costs early in the year strain your budget, enroll in the Medicare Prescription Payment Plan (M3P) through your Part D plan. M3P spreads your $2,000 out-of-pocket cap into equal monthly payments throughout the year with no interest. Learn more at medicare.gov/prescription-payment-plan.
How the 2026 Medicare Part D Out-of-Pocket Cap Works
Historically, Medicare Part D contained a confusing "coverage gap" (donut hole) where beneficiaries paid 25% of drug costs after reaching initial coverage limits, leading to thousands of dollars in unexpected costs for high-cost brand-name drugs.
The Inflation Reduction Act of 2022 permanently capped out-of-pocket Part D spending at $2,000 per year. In 2026, once your combined deductibles and copays reach $2,000, you pay $0 for all covered Part D medications for the rest of the calendar year.
Real-Life Examples — Coverage Gap Progress
Catherine — Reaching the $2,000 Cap by May
Catherine takes a specialized cancer medication costing $500/month in out-of-pocket copays.
| Metric | Value |
| Monthly Copay | $500 / month |
| Months to $2,000 Cap | 4 Months (Jan – April) |
Result: By May 1st, Catherine reaches her $2,000 cap. From May through December 31st, her prescription copays are $0, saving her over $4,000 compared to pre-2024 rules.
Common Medicare Donut Hole & Part D Mistakes
1. Assuming Non-Formulary Drugs Count Toward the $2,000 Cap
Only medications included on your Part D plan's official drug formulary count toward your True Out-of-Pocket (TrOOP) total. If you pay full price out-of-pocket for an off-formulary drug without an approved exception, that spend does NOT count toward the $2,000 cap.
The fix: Work with your doctor to request a Formulary Exception from your plan before paying full price out-of-pocket. See official guidelines at medicare.gov exceptions page.
Official Government Sources Used in This Tool
| Source Name | What We Used It For | Direct Link |
|---|---|---|
| CMS Part D Out-of-Pocket Cap Guidance 2026 | Official $2,000 Part D out-of-pocket cap rules and $0 catastrophic phase implementation | medicare.gov Part D Costs |
| Medicare Prescription Payment Plan (M3P) | Official guidelines for spreading out-of-pocket prescription drug payments into monthly installments | medicare.gov M3P Plan |
Seniors Audit is an independent educational platform. We are not affiliated with, endorsed by, or connected to CMS or any government agency. All calculations use official Inflation Reduction Act Part D rules.
Frequently Asked Questions About the Medicare Coverage Gap
Does the Medicare Part D donut hole still exist in 2026?
The traditional "donut hole" (where seniors paid 100% or 25% of drug costs without limit) has been fundamentally transformed. Under the Inflation Reduction Act, 2026 introduces a strict $2,000 annual out-of-pocket cap for all Medicare Part D prescription drug plans. Once your out-of-pocket spend reaches $2,000, you pay $0 for covered drugs for the rest of the year.
What is the 2026 Medicare Part D out-of-pocket cap?
In 2026, out-of-pocket spending for Medicare Part D prescription drugs is capped at $2,000 per year per person. This applies to both standalone Part D plans and Medicare Advantage plans with prescription drug coverage (MAPD).
What happens after I reach the $2,000 out-of-pocket cap in 2026?
Once your true out-of-pocket (TrOOP) spending reaches $2,000, you enter the catastrophic coverage phase. In this phase, you pay $0 for all Medicare Part D covered prescription drugs for the remainder of the calendar year.
What counts toward the $2,000 Part D out-of-pocket limit?
Counts toward your $2,000 cap: (1) What you pay out-of-pocket for deductibles, copays, and coinsurance; (2) Manufacturer discounts on brand-name drugs applied in the coverage gap. Premium payments and non-covered drugs do NOT count toward the $2,000 limit.
What is the Medicare Prescription Payment Plan (M3P)?
Beginning in 2025/2026, the Medicare Prescription Payment Plan (M3P) allows beneficiaries to spread their out-of-pocket prescription drug costs into capped monthly installments throughout the calendar year instead of paying high upfront costs at the pharmacy counter.
Does the $2,000 cap apply to Part B drugs (like doctor-administered infusions)?
No. The $2,000 out-of-pocket cap applies exclusively to Medicare Part D outpatient prescription drugs. Medications covered under Medicare Part B (such as chemotherapy, dialysis drugs, or doctor-administered injections) are subject to standard Part B 20% coinsurance unless covered by Medigap.
When does the $2,000 out-of-pocket limit reset?
The $2,000 out-of-pocket cap resets every calendar year on January 1st.
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About This Educational Estimate: This tool is for educational purposes only. Seniors Audit uses the official formulas published by the relevant government agency, but results are estimates based on the information you entered. Rules, rates, and eligibility thresholds change annually and vary by individual circumstance.
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Seniors Audit is independent and not affiliated with any government agency or insurance company. We are not affiliated with, endorsed by, or connected to any government agency, insurance company, or financial services firm. All calculations use the official formulas and current figures published by the agencies listed above. We do not receive payment for referrals, leads, or any action taken by visitors to this site.