Medicare Part D Out-of-Pocket Cap: $2,100 in 2026

Btcson Lab Team · Last verified 2026-09-27

2026-09-27

Short answer: For 2026, Medicare Part D reaches its catastrophic stage after $2,100 of out-of-pocket spending on covered Part D drugs; the 2027 amount is $2,400. The maximum Part D deductible is $615 in 2026 and $700 in 2027. After the cap is reached, the enrollee pays $0 for covered Part D drugs for the rest of that calendar year. Premiums and non-covered drugs do not count toward the cap.

The 2026 and 2027 official figures

The cap is about covered Part D drug spending, not every health-care dollar that leaves your bank account. Your monthly Part D premium does not move you closer to the cap, and spending on drugs the plan does not cover does not count either.

The formula

remaining covered-drug exposure = max(0, annual Part D out-of-pocket cap - qualifying out-of-pocket spending so far)

This is a ceiling on qualifying prescription spending, not a promise that every prescription is covered or that every payment counts.

Worked example

Use the official annual caps only.

• 2026 cap: $2,100.
• 2027 cap: $2,400.
• Difference: 2,400 - 2,100 = $300.

So a beneficiary who reaches the catastrophic threshold in both years has $300 more maximum qualifying Part D out-of-pocket exposure in 2027 than in 2026, before considering plan premiums or non-covered drugs.

If a 2026 enrollee has already accumulated the full $2,100 in qualifying out-of-pocket spending, the formula becomes:

max(0, $2,100 - $2,100) = $0

For covered Part D drugs, the rest-of-year out-of-pocket amount is then $0.

What the cap does not solve

A low or capped prescription bill can still sit next to a high total health-care budget. Part B premiums, Medigap or Medicare Advantage premiums, non-Part-D services, and drugs excluded from the plan’s formulary are separate questions. The useful budgeting move is to keep the Part D cap as its own line item instead of treating it as an all-in Medicare maximum.

The mistake people make: treating the Part D cap as an all-in Medicare cap

The Part D out-of-pocket threshold is specific to covered Part D drugs. It does not cap Part B premiums, Medigap premiums, Medicare Advantage costs, dental care, or every pharmacy purchase. That distinction matters in retirement budgeting because a person can hit the Part D catastrophic threshold and still have substantial medical cash outflow elsewhere. A second interaction is formulary status: if a drug is not covered by the plan, spending on it may not receive the protection a reader expects from the headline cap. Use the cap as one budget ceiling for qualifying prescription costs, then model premiums and non-Part-D health spending separately.

What would flip the answer

• The drug is not covered by Part D. Spending on a non-covered drug does not get the protection described by this cap.
• The payment does not count toward Part D out-of-pocket spending. Premiums are the clearest example; they remain a separate cash expense.
• The year changes. The official cap rises from 2,100 in 2026 to 2,400 in 2027, so use the figure for the calendar year you are budgeting.
• Your filing, income, timing, or eligibility facts change. Re-run the calculation with the facts for the year you are actually filing or planning.

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