For almost two decades, "the donut hole" was the single most confusing part of having Medicare drug coverage. People would budget carefully through the spring, only to watch their costs jump sharply in the fall once they crossed an invisible spending line. That structure is gone now, replaced by something considerably simpler — but "simpler" doesn't mean "nothing to plan for." This guide walks through exactly what changed, what the 2026 numbers are, and where people still get tripped up even without a donut hole to fall into.
1. What the Donut Hole Actually Was
The donut hole, formally called the Part D coverage gap, was a phase in the old four-stage Medicare Part D structure. After a beneficiary's total drug spending (their own money plus the plan's) crossed a certain threshold, they'd suddenly become responsible for a much larger share of their drug costs — historically close to full price for a stretch — until they'd spent enough to reach "catastrophic coverage," where costs dropped again. For someone on an expensive specialty drug, that gap could mean thousands of unplanned dollars in a single year.
2. What Replaced It in 2025–2026
The Part D coverage gap was permanently eliminated on January 1, 2025, under the Inflation Reduction Act of 2022, as part of a broader multi-year restructuring of Medicare drug benefits. The old four-phase system — deductible, initial coverage, coverage gap, catastrophic — became a simplified three-phase system: deductible, initial coverage, and catastrophic. The gap phase itself didn't get smaller. It was removed entirely.
2026 is not a rollback year. The out-of-pocket cap moved from $2,000 in 2025 to $2,100 in 2026 because the cap is indexed to Part D spending growth, not because the donut hole structure is returning. CMS is expected to announce the 2027 cap and deductible figures in the third quarter of 2026, following the usual annual release schedule.
3. The Three 2026 Part D Phases, Explained
Notice there's no fourth phase anymore. That's the entire structural change — the gap that used to sit between initial coverage and catastrophic coverage has simply been removed from the math.
4. Old Donut Hole vs. New 2026 Structure
| Feature | Old structure (pre-2025) | 2026 structure |
|---|---|---|
| Number of phases | Four | Three |
| Coverage gap ("donut hole") | Yes — costs jumped sharply after a spending threshold | Eliminated |
| Catastrophic threshold | ~$8,000 in total drug spending (2024) | $2,100 true out-of-pocket spending (2026) |
| Cost once in catastrophic phase | Small coinsurance (around 5%) still applied | $0 out-of-pocket |
| Predictability | Costs could spike mid-year unexpectedly | Hard annual cap, easier to budget around |
| Monthly payment smoothing option | Not available | Medicare Prescription Payment Plan |
5. Real-World Cost Examples
Numbers are easier to picture with an example. These are simplified illustrations, not a calculation of your exact costs, since coinsurance percentages and covered-drug status vary by plan and medication.
| Situation | Approx. annual out-of-pocket | What happens |
|---|---|---|
| Beneficiary on a few generic drugs, low monthly cost | $200–$500 | Stays in the initial coverage phase all year, never nears the cap |
| Beneficiary on one moderate-cost brand-name drug | $1,200–$2,100 | May reach the $2,100 cap by mid-to-late year, then pays $0 after |
| Beneficiary on a high-cost specialty medication | $2,100 (capped) | Reaches the cap early in the year, then pays $0 for the rest of it |
| Extra Help (LIS) recipient on multiple drugs | Often under $2,100, sometimes much less | Extra Help payments count toward the cap, so catastrophic coverage often arrives faster |
6. Extra Help (LIS): Who Reaches the Cap Fastest
The Extra Help program, also called the Low-Income Subsidy, reduces Part D premiums, deductibles, and coinsurance for income-qualifying beneficiaries. Because payments made through Extra Help count toward your $2,100 true out-of-pocket total, LIS recipients frequently reach the catastrophic, $0-cost phase faster than beneficiaries without the subsidy, even though they're personally spending less along the way.
7. Eligibility Comparison
| Program / feature | Who it applies to |
|---|---|
| $2,100 out-of-pocket cap | All Medicare Part D and Medicare Advantage prescription drug plan enrollees |
| $615 maximum deductible | All Part D enrollees, though many plans set it lower |
| Extra Help (LIS) | Income- and asset-qualifying Medicare beneficiaries |
| Medicare Prescription Payment Plan | Any Part D enrollee, opt-in, regardless of income |
| $35/month insulin cap | All Part D and Part B enrollees using covered insulin |
8. Income Limit Comparison for Extra Help
| Household size | Approx. annual income limit | Resource limit |
|---|---|---|
| 1 person | ~150% of the federal poverty level | ~$17,000–$18,000 |
| 2 people | ~150% of the federal poverty level | ~$28,000–$29,000 |
These figures adjust annually and vary slightly by whether you're applying for full or partial Extra Help — use Medicare.gov's official Extra Help application or SSA.gov to confirm the exact current-year numbers rather than relying on last year's limits.
9. What Counts Toward the Cap (And What Doesn't)
| Cost type | Counts toward the cap? |
|---|---|
| Your deductible payments | Yes |
| Copays and coinsurance on covered drugs | Yes |
| Amounts paid on your behalf through Extra Help | Yes |
| Manufacturer discount program contribution (initial phase) | Yes |
| Your monthly Part D premium | No |
| Costs for drugs not on your plan's formulary | No |
| Costs paid by most third-party charity assistance (varies by source) | Sometimes — depends on the assistance type |
The formulary catch: if a drug isn't on your plan's covered-drug list, money spent on it doesn't count toward your $2,100 cap at all — it's simply outside the Part D benefit for that plan. This is why checking your formulary and drug pricing during Open Enrollment still matters, even with the cap in place.
10. The Medicare Prescription Payment Plan
Separate from the cap itself, 2026 continues the Medicare Prescription Payment Plan — an opt-in program letting you spread your out-of-pocket Part D costs into monthly installments across the calendar year instead of paying larger amounts at the pharmacy counter. It's aimed at smoothing cash flow, particularly for beneficiaries who'd otherwise face a large deductible or expensive fill early in the year.
- What it does: Converts your pharmacy out-of-pocket costs into a monthly bill from your plan instead.
- What it doesn't do: Lower your total annual cost — you still pay up to the same $2,100, just spread differently across the year.
- How to enroll: Contact your Part D plan directly; enrollment is voluntary and can typically be requested at any point during the year.
11. Step-by-Step: Planning Your 2026 Drug Costs
Check your plan's current deductible
Confirm whether your specific plan uses the full $615 maximum, a lower amount, or waives it for generics.
Confirm your drugs are still on the formulary
A drug covered in 2025 isn't guaranteed to stay covered, or stay in the same cost tier, in 2026 — check your plan's current formulary directly.
Estimate whether you'll hit the $2,100 cap
If you take one or more higher-cost medications, you may reach catastrophic coverage well before December — knowing roughly when helps you plan cash flow for the rest of the year.
Check Extra Help eligibility if income is limited
Even partial Extra Help can meaningfully lower your deductible and coinsurance while you work toward the cap.
Consider the Medicare Prescription Payment Plan if cash flow is tight
This won't reduce what you owe for the year, but it can prevent a large January deductible hit from straining your budget.
12. Enrollment and Processing Timelines
| Action | Typical timeline |
|---|---|
| Extra Help application (via Social Security) | Several weeks for a decision |
| Medicare Prescription Payment Plan enrollment | Can typically start within the same billing cycle after enrolling |
| Reaching the $2,100 cap (high-cost drug user) | As early as the first few months of the plan year |
| Plan formulary changes taking effect | Once per plan year, typically January 1, following fall Open Enrollment |
13. What Resets Each Plan Year
- Your deductible and $2,100 out-of-pocket total reset to $0 every January 1, regardless of what you spent the previous year.
- Extra Help eligibility is reassessed periodically based on current income and resources — a life change (income, marriage, benefits) can affect your status.
- Formularies and drug tiers can change every plan year, so re-check your specific medications during each fall Open Enrollment Period rather than assuming continuity.
- If you enrolled in the Medicare Prescription Payment Plan, confirm whether you need to re-elect it for the new plan year or if it carries forward automatically under your specific plan's rules.
14. Common Mistakes to Avoid
Mistakes people make
- Assuming the donut hole could return and delaying spending decisions around it
- Not checking whether a drug stayed on the formulary for the new plan year
- Forgetting that plan premiums don't count toward the $2,100 cap
- Not applying for Extra Help because of an outdated income assumption
- Assuming the payment plan lowers total cost rather than just spreading it out
What works well
- Reviewing your plan's formulary every fall during Open Enrollment
- Estimating roughly when you'll hit the $2,100 cap based on your regular medications
- Reapplying for Extra Help promptly after any income change
- Using the Prescription Payment Plan specifically for cash-flow timing, not cost reduction
- Comparing your discount card options for any drug that isn't on your plan's formulary
15. Pros and Cons of the New Structure
Advantages
- A hard, predictable annual spending cap instead of a mid-year cost spike
- Catastrophic phase now means $0 out-of-pocket, not just lower coinsurance
- Extra Help payments count toward the cap, helping low-income beneficiaries faster
- Optional payment smoothing through the Prescription Payment Plan
Limitations
- $2,100 is still a real amount to budget for, not free coverage
- Plans can still shift formularies and cost tiers each year
- Non-formulary drug costs don't count toward the cap at all
- Premiums are separate and not capped by this structure
16. Decision Tree: What Should You Check Right Now?
Check that your medications are still covered at the same tier, and consider opting into the Medicare Prescription Payment Plan if a large early-year cost would strain your budget.
Related: Medicare Part D 2026 Changes: What to Know
A broader look at everything that changed in Part D this year, beyond just the coverage gap.
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