The gamble people take

No prescriptions? You probably still want Part D. Here is the math.

Short answer: yes, for almost everyone, and the reason is not that you might get sick, though you might. The reason is that the Part D late enrollment penalty is permanent, compounds for every month you went without creditable coverage, and cannot be undone once triggered. A basic drug plan often costs about the price of a couple of coffees a month, and most people can find one for well under $11 in 2027. Skipping it buys a small saving now and a lifetime surcharge later. The one legitimate exception is having other creditable coverage, which is a specific thing with a specific letter.

By the Medicare Decoder team · Updated September 30, 2026 · 4-minute read · Figures are official CMS amounts, checked against CMS

Key takeaways

The Part D penalty is 1% of the national base premium ($41.33 in 2027) for each month you went without creditable coverage, added permanently.
Permanent means permanent: it follows you for as long as you have Part D, rising as the base premium rises.
Most people can find a basic drug plan for a low monthly premium; CMS projects 88% of non-low-income beneficiaries can access one at $10.30 or less in 2027.
Creditable coverage (employer, union, VA, TRICARE) legitimately excuses you. Keep the annual notice proving it.
The 2027 out-of-pocket cap of $2,400 only protects you if you are enrolled when you need it.

Jump to How the penalty works The actual math The legitimate exception What happens if you need something suddenly What to do FAQ

How the penalty works, precisely

If you go 63 or more days in a row without Part D or other creditable drug coverage after your initial enrollment window closes, Medicare adds a permanent surcharge when you eventually enroll. The formula: 1% of the national base beneficiary premium for every full month you went uncovered, rounded to the nearest ten cents, added to your monthly premium for as long as you have Part D. The base premium is $38.99 in 2026 and $41.33 in 2027, and because the penalty is a percentage of a figure that rises over time, the dollar amount of your penalty grows too. The full mechanics, with worked examples, are in the penalty article.

The actual math, both directions

Scenario	What you save now	What it costs later
Skip Part D for 2 years, then enroll	Roughly $250 to $500 in avoided premiums	About 24% added to your premium permanently, roughly $10 a month at 2027 rates, and rising
Skip for 5 years, then enroll	Perhaps $600 to $1,500	About 60%, roughly $25 a month permanently, and rising
Enroll on time in a low-cost plan	Nothing	Nothing, plus immediate access to the $2,400 cap if you ever need it

Illustrative, using the 2027 base premium of $41.33. Your actual plan premium and penalty depend on the plan you choose and your own coverage history.

The asymmetry is the whole argument. The downside of enrolling is small and bounded: a modest premium for a plan you may barely use. The downside of skipping is unbounded in time, because the surcharge never expires, and unbounded in risk, because the drug you cannot currently imagine needing is precisely the one that costs thousands. A single new prescription for a specialty medication can exceed a decade of premiums in one year.

The legitimate exception: creditable coverage

If you have drug coverage at least as good as Part D, you are not penalized for skipping Part D while you have it. That includes most employer or union plans, VA benefits, TRICARE For Life, and some retiree plans. Two rules matter: your plan must send you an annual notice of creditable coverage, and you must keep it, because it is your proof if Medicare ever assesses a penalty. When that coverage ends, you get a Special Enrollment Period to join Part D without penalty, and it is time-limited, so act inside it. Details for veterans are in the VA and TRICARE article, and for people still working in the working-past-65 article.

What happens if you need something suddenly

This is the scenario people underestimate. If you are diagnosed in February with something requiring an expensive medication and you have no Part D, you generally cannot join a drug plan until the next Annual Enrollment Period in October, for coverage beginning the following January. That is up to eleven months paying the full retail price of a drug you need now, followed by a permanent penalty once you do enroll. Health events do not wait for enrollment windows, and enrollment windows do not open for health events. That timing mismatch, more than the penalty itself, is the strongest argument for carrying coverage you hope to waste.

What to do

If you have no other drug coverage: enroll in a low-cost plan during your initial window at 65, and re-shop it each fall. The 20-minute method works the same whether you take ten drugs or none.
If you have employer, VA, or TRICARE coverage: confirm in writing that it is creditable, file the notice, and diarize the date it ends.
If money is genuinely tight: check Extra Help, which can reduce or eliminate Part D premiums and deductibles entirely.
If you already skipped: enroll at the next opportunity anyway. The penalty is based on months uncovered, so every additional month you wait makes the permanent surcharge larger.

Questions people also ask

Do I need Medicare Part D if I don't take any prescriptions?

For most people, yes. Without creditable drug coverage, skipping Part D triggers a permanent late enrollment penalty of 1% of the national base premium per uncovered month, and you generally cannot join outside the annual window if you suddenly need medication. Low-premium plans make the insurance inexpensive.

How much is the Part D late enrollment penalty?

One percent of the national base beneficiary premium ($41.33 in 2027) for each full month you went without creditable coverage, added to your premium permanently. Going uncovered for three years adds roughly 36%, and the dollar amount grows as the base premium rises.

What counts as creditable drug coverage?

Coverage at least as good as standard Part D, which typically includes employer and union plans, VA benefits, TRICARE For Life, and some retiree plans. Your plan must send an annual notice confirming creditable status, and you should keep those notices as proof.

Can I join a Part D plan any time if I get sick?

Generally no. Outside your initial enrollment window, joining usually waits for the annual enrollment period (October 15 to December 7) with coverage starting January 1, unless a Special Enrollment Period applies, such as losing creditable coverage or qualifying for Extra Help.

What is the cheapest Medicare drug plan?

It varies by county and by your prescriptions. CMS projects that 88% of beneficiaries not receiving low-income assistance will have access to a basic Part D plan at $10.30 per month or less in 2027. Compare by total annual cost rather than premium alone.

Sources for this article

Medicare.govPart D costs: premiums, the late enrollment penalty, and coverage phases.
CMS.gov2027 plan landscape (September 28, 2026): projected plan availability and premium figures.
CMS.gov2027 Part D bid announcement: the $41.33 national base beneficiary premium.

Figures checked against these sources on September 30, 2026. We update within days when CMS publishes new amounts.

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