Zepbound (tirzepatide) is the FDA-approved brand of tirzepatide for weight loss. It works well, but price is the biggest hurdle for most people. The good news: as of mid-2026 there are more ways to bring the cost down than there were a year ago. Here is what each path actually costs. (See our tirzepatide guide.)
The List Price
Without any discount, Lilly lists Zepbound at $499 to $1,086.37 per fill, depending on the product and the dose. Lilly counts a month as 28 days. This is the price before any insurance, savings card or self-pay program is applied. What you actually pay depends on your insurance, the program you use, and your dose.
LillyDirect Self-Pay
Eli Lilly sells Zepbound directly to cash-paying patients through LillyDirect, as a single-patient-use KwikPen or a 4-count single-dose vial. It is not sold this way as the single-dose pen. You pay out of pocket, with no insurance involved. These are the regular prices for a 28-day supply:
- $299 for the 2.5 mg dose and $399 for 5 mg
- $499 for the 7.5 mg dose
- $699 for the 10 mg, 12.5 mg and 15 mg doses
There is also a $449 purchase offer that covers your first KwikPen fill at 7.5 mg or above. It keeps applying only if each refill purchase is completed within 45 days of your previous delivery. It is for the KwikPen only, is capped at 11 fills a year, and ends December 31, 2026. Plan around the dose you expect to stay on: 2.5 mg is a starting dose, not an approved maintenance dose.
This is the route to look at if your insurance will not cover Zepbound at all. With the vial you fill a syringe yourself; the KwikPen is a pen you use directly. The medicine is the same either way. (See our GLP-1 pricing guide and savings calculator.)
The Lilly Savings Card
The savings card is for people with commercial insurance (a plan through work or one you buy yourself, not a government plan). How much it helps depends on your coverage:
- If your commercial plan covers Zepbound, the card can drop your cost to as little as $25 per month.
- If your commercial plan does not cover Zepbound, the card takes a few hundred dollars off the monthly cost instead.
Medicare and Medicaid plans can't use the savings card. Terms change often, so check Lilly's site for the current offer before you count on a number.
Insurance and Prior Authorization
More plans cover Zepbound now, but coverage is still uneven. Most plans require prior authorization. That means your provider asks the plan to approve the drug before the pharmacy fills it. You'll usually need to show a BMI of 30 or higher (or 27 or higher with a weight-related condition), and sometimes proof that you tried diet changes or another weight-loss medication first. (Not sure of your number? Use our BMI calculator.)
If your plan denies it, ask about an appeal. A clear letter from your provider can turn a no into a yes. (See our guide to GLP-1 insurance coverage and our insurance overview.)
New: Medicare Coverage in 2026
This is the big change. Starting July 1, 2026, a CMS demonstration called the GLP-1 Bridge covers the Zepbound KwikPen for obesity, for eligible Part D enrollees. It runs outside the normal Part D benefit, and single-dose vials and pens are not covered. If you qualify, your copay is a flat $50 per month. You'll need to meet BMI criteria, and prior authorization is required. The program runs through December 31, 2027. (See our full Medicare GLP-1 coverage guide.)
What About Compounded Tirzepatide?
Compounded tirzepatide used to be a cheap workaround during the shortage. The shortage ended in 2025, and on April 30, 2026 the FDA proposed excluding tirzepatide, semaglutide and liraglutide from the 503B bulks list, the list of bulk ingredients that large outsourcing facilities may compound from (FDA announcement). That is a proposal, not a ban on all compounding. Don't build your plan around it. The LillyDirect vials are now the dependable low-cost route.
Zepbound vs Mounjaro
Both are tirzepatide, so the medicine is identical. The difference is the label: Zepbound is approved for weight loss, and Mounjaro is approved for type 2 diabetes. Which one you get often comes down to what your plan covers. (See our Zepbound vs Mounjaro comparison and Mounjaro cost guide.)
The Bottom Line
Most people can get Zepbound well under the list price. With covered commercial insurance, aim for $25 a month. On Medicare, it's $50. Paying cash, LillyDirect starts at $299 for the 2.5 mg starting dose and runs to $699 at the higher doses. Talk to your doctor about which path fits your coverage and dose.
Ready to start? Find a clinic that prescribes Zepbound near you, or browse clinics by state to compare pricing and availability.