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, Zepbound's list price is about $1,086 per month. Almost nobody should pay that, so treat it as the starting number you work down from. What you actually pay depends on your insurance, the program you use, and your dose.
LillyDirect Self-Pay Vials
Eli Lilly sells single-dose Zepbound vials directly to cash-pay patients through LillyDirect. You pay out of pocket, but the price is far below the list price. As of mid-2026 the vials run roughly:
- About $299/month for the 2.5mg dose and $399/month for 5mg
- About $449/month for the 7.5mg or 10mg dose
- About $449/month for the 12.5mg or 15mg dose, as long as you refill within 45 days
This is the most reliable option if your insurance won't cover Zepbound at all. You fill a syringe from a vial instead of using an auto-injector pen, but the medicine is the same. (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, Medicare Part D covers Zepbound for obesity through the GLP-1 Bridge program. 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. That door is closing. The shortage ended in 2025, and the FDA proposed a permanent ban on compounded tirzepatide on April 30, 2026. 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, the LillyDirect vials start at $299. 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.