Zepbound Cost at Costco in 2026: Real Pricing Breakdown

Without insurance, Zepbound at Costco costs roughly $1,020 to $1,080 a month for a 28-day box of four single-dose pens, close to Eli Lilly’s list price of $1,086. Costco’s pharmacy runs on thin margins, so its cash price tends to sit at or just below what other major pharmacies charge. But the warehouse counter isn’t your only option, and for many people it isn’t the cheapest. Lilly’s own LillyDirect vials, the Zepbound savings card, and cash-pay telehealth programs can all land well below Costco’s pen pricing. Here’s the full breakdown for 2026.

What Zepbound costs at Costco

Lilly sets one list price for Zepbound across all six dose strengths, so your dose doesn’t change the cash number. Costco’s pharmacy adds a small margin on top of that wholesale price.

Costco Mail Order Pharmacy ships at the same cash price as the in-store counter, and Sam’s Club usually prices within $10 to $30 of Costco. You don’t need to be a member to use a warehouse pharmacy under federal rules, though membership helps for everything else.

The Zepbound Savings Card

If you have commercial (employer or marketplace) insurance that covers Zepbound, the Lilly savings card can drop your cost to as low as $25 for a one to three month fill. The card caps savings at roughly $100 per 28-day fill in 2026 (down from $150) and $1,300 a year, across up to 13 fills. If your commercial plan doesn’t cover Zepbound, the card still applies, bringing single-dose pens to about $499 a month. People on Medicare, Medicaid, or other government plans can’t use the card.

LillyDirect vials: usually the cheaper cash route

This is the number most people miss. Through LillyDirect’s self-pay program, Zepbound single-dose vials cost $299 (2.5 mg), $399 (5 mg), and $449 (7.5 mg through 15 mg) a month, effective February 23, 2026. That’s a meaningful drop from Costco’s pen pricing. The catch is format: vials require drawing the dose into a syringe yourself rather than clicking a pre-filled pen, though your provider can show you the technique. To keep the $449 ceiling on higher doses, you refill within 45 days. Since October 2025, you can also pick these up at Walmart pharmacies instead of waiting for home delivery.

Medicare, HSA, and FSA

Medicare Part D doesn’t cover Zepbound for weight loss, but Medicare enrollees can still buy LillyDirect vials on a cash basis. One exception: if Zepbound was prescribed for obstructive sleep apnea, which it’s FDA-approved to treat, Part D coverage may apply. A federal pricing pathway expected to roll out in mid-2026 may add a lower Medicare option, though the details are still settling. HSA and FSA dollars cover Zepbound at Costco when you have an obesity diagnosis documented, which effectively discounts the cost by your tax rate.

Lower-cost alternatives

The strongest weight-loss data behind Zepbound is real. In the SURMOUNT-2 trial, tirzepatide produced substantial weight reduction in adults with obesity and type 2 diabetes, which is part of why demand stays high. But strong results don’t mean you should overpay. Consider a scenario where someone’s commercial plan excludes weight-loss drugs entirely. Rather than paying Costco’s full cash price, they could compare LillyDirect vials against a cash-pay telehealth program. TrimRx offers physician-prescribed tirzepatide through a cash-pay model, with monthly pricing that runs from $179 to $1,579 depending on the medication and your situation, no insurance required.

To weigh your choices, our guides to the Wegovy cash price and the GoodRx Ozempic price show how the other major GLP-1s compare. You can also learn more about TrimRx’s cash-pay program on the homepage, or check whether you qualify through the free assessment quiz.

This article is for educational purposes only and is not medical advice. Drug prices change frequently, and the figures here reflect 2026 pricing that may shift; verify current costs with the pharmacy, your plan, and the manufacturer. Always consult a licensed healthcare provider about treatment decisions.