What Your Prescriptions Cost
How much does insulin cost with Medicare in 2026?
Last reviewed: · Big Sioux Benefits Data Desk
You pay no more than $35 for a one-month supply of each covered insulin product, with no deductible applied (Medicare.gov). A three-month supply costs no more than $35 per month's supply, so no more than $105. The cap applies at any in-network pharmacy regardless of preferred status, and it applies to everyone with Part D drug coverage, including people who receive Extra Help, who often pay less still.
The qualifier: the cap is per covered insulin product. If you use two different insulins, a long-acting and a rapid-acting, the $35 applies to each, so your monthly insulin cost is up to $70 rather than $35. And the cap covers insulin under Part D. Insulin delivered through a durable medical equipment insulin pump falls under Part B instead, where a separate $35 cap applies.
What you pay, by situation
| Situation | Your cost |
|---|---|
| One covered insulin, one-month supply | No more than $35 |
| One covered insulin, three-month supply | No more than $105 |
| Two different covered insulins, one month | No more than $35 each, so up to $70 |
| Before you have met your deductible | Still no more than $35, the deductible does not apply |
| At a standard rather than preferred pharmacy | Still no more than $35 |
| With Extra Help | $35 or less, and often considerably less |
The detail worth knowing, because it works in your favor and almost nobody is told it: the amount you would have paid above the $35 cap still counts toward your annual out-of-pocket total. In other words, insulin pushes you toward the $2,100 cap much faster than your receipts suggest. If you also take expensive non-insulin drugs, that hidden accumulation can bring the whole year to $0 sooner than you would expect, which is worth checking rather than assuming.
Sources
- Medicare.gov — Costs for Medicare drug coverage — accessed 2026-08-21
- Medicare.gov — Help with drug costs (Extra Help) — 2026 limits and amounts; accessed 2026-08-21
- CMS — Announcement of Calendar Year 2026 Medicare Advantage Capitation Rates and Part C and Part D Payment Policies (Part D benefit parameters) — CY2026 parameters; accessed 2026-08-21
Related questions
Does the $35 cap apply to insulin used in a pump?
Insulin used with a durable medical equipment insulin pump is covered under Part B rather than Part D, and a separate $35 cap for a month's supply applies there. The practical result is the same ceiling, but it runs through a different part of Medicare with different billing.
I take two insulins. Is my cap $35 or $70?
The cap is $35 per covered insulin product per month's supply, so two different insulins means up to $70 a month. It is not a single combined $35 ceiling across all your insulin.
Drug costs turn on your specific prescriptions, so the arithmetic is worth doing once, properly: book a free, no-pressure conversation, see your county's South Dakota plan lineup, or browse all answers. SHIINE, the state's free counseling program, is at 1-800-536-8197 and sells nothing.
Big Sioux Benefits is a licensed insurance agency, not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Contact Medicare.gov, 1-800-MEDICARE, or SHIINE (South Dakota's SHIP) for all of your options.