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 (CMS). 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
- CMS — Costs for Medicare drug coverage — accessed 2026-08-21
- CMS — 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. Big Sioux Benefits handles the enrollment steps with you, so nothing is missed, at no cost to you.
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. We run these numbers for your own situation at Big Sioux Benefits, at no cost to you.
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.
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 or 1-800-MEDICARE for all of your options.