Zepbound Cost at Costco in 2026: Real Pricing Breakdown

Introduction

Zepbound® at Costco pharmacy runs about $1,020 to $1,069 per month in May 2026 for a 28-day box of four pens. That’s $50 to $115 below typical CVS or Walgreens pricing and one of the lowest retail cash prices available. Costco’s pharmacy operates on tight margins as a member loyalty driver, which lets the warehouse club undercut major drugstore chains.

You don’t need a Costco membership to use the pharmacy. Federal law requires Costco to fill prescriptions for any walk-in customer. The Costco Member Prescription Program adds small discounts on some medications, but Zepbound isn’t typically included due to Lilly’s contract restrictions on brand-name GLP-1 discounting.

This guide explains what Zepbound really costs at Costco in 2026, when the Lilly savings card applies, and how Costco compares to LillyDirect vials.

At TrimRx, we believe that understanding your options is the first step toward a more manageable health journey. You can take the free assessment quiz if you’re ready to see whether a personalized program is a fit for you.

How Much Does Zepbound Cost at Costco Without Insurance in 2026?

Without insurance, Zepbound at Costco costs about $1,020 to $1,069 per month for a 28-day box of four pens. That’s Costco’s typical low margin on top of Lilly’s wholesale price. The warehouse club’s pharmacy operates near break-even as a member loyalty driver, which translates to consistent retail discounts.

Quick Answer: Zepbound cash price at Costco is roughly $1,020 to $1,069 per month

Lilly flat-prices Zepbound across all six doses (2.5 mg through 15 mg). Cash price stays the same regardless of dose. The intentional flat pricing keeps titration affordable.

Annual cash cost at Costco works out to about $12,240 to $12,828. That’s marginally cheaper than CVS or Walgreens annual cost but still high enough to push most cash payers toward LillyDirect vials.

Do I Need a Costco Membership to Fill Zepbound?

No. Federal pharmacy law requires Costco to serve non-members at the pharmacy. You can walk in, hand over a prescription, and pay without showing a membership card. Most Costco locations have a pharmacy entrance path that bypasses warehouse entry verification.

Costco’s Member Prescription Program (free for members) adds small discounts on some medications, but Zepbound isn’t typically on the discount list because Lilly’s contract terms limit brand-name GLP-1 discounting. Members and non-members pay essentially the same cash price for Zepbound.

If you’re using Costco for other shopping, the membership pays off elsewhere. For Zepbound specifically, membership doesn’t matter.

Does Costco Accept the Lilly Zepbound Savings Card?

Yes. Costco pharmacies accept the Lilly Zepbound Savings Card. With commercial insurance covering Zepbound, eligible patients pay as little as $25 per month. Without commercial insurance, the card drops the price to about $650 per month at Costco. The card excludes Medicare, Medicaid, TRICARE, and VA patients.

The Zepbound savings card combined with Costco’s already-lower cash pricing makes it one of the best Zepbound deals available at any retail pharmacy.

What Does Zepbound Cost at Costco with Insurance?

With commercial insurance covering Zepbound, Costco copays typically run $25 to $150 per month. Coverage varies widely because many commercial plans exclude weight-loss medications entirely. Plans that cover Zepbound usually require prior authorization documenting BMI and weight-loss history.

Stacking the Lilly savings card on commercial insurance brings most commercially insured patients to $25 monthly at Costco, the same price as any other pharmacy. The cash-price advantage at Costco mainly matters for uninsured patients.

Medicare Part D plans rarely cover Zepbound because Medicare excludes most weight-loss medications. The 2003 Medicare Modernization Act prohibits Part D from covering drugs prescribed for weight loss, with limited exceptions. Patients on Medicare typically pay cash for Zepbound or use the LillyDirect uninsured pathway.

How Does Costco Compare to LillyDirect for Zepbound?

LillyDirect ships Zepbound vials for $349 (2.5 mg) to $499 (5 mg and higher) per month direct to cash-paying patients. That’s $521 to $720 below Costco’s pen pricing. The vials require self-drawing into a syringe rather than using the prefilled auto-injector pen.

For cash-paying patients comfortable with vial administration, LillyDirect is the clear price winner. The active ingredient is identical to Costco-dispensed pens.

For patients who prefer the auto-injector pen format, Costco is one of the cheapest brick-and-mortar options.

Is Zepbound Covered for Weight Loss at Costco?

Yes, when commercial insurance covers weight-loss medications. Zepbound is FDA-approved for chronic weight management (BMI 30+ or BMI 27+ with comorbidities). The SURMOUNT-1 trial (Jastreboff et al. 2022 NEJM) demonstrated 20.9% mean weight loss at 72 weeks on tirzepatide 15 mg.

Roughly 40% to 50% of commercial plans cover Zepbound for obesity as of early 2026. The rest either exclude weight-loss GLP-1s or require strict prior authorization.

Costco pharmacy will fill any valid Zepbound prescription. If insurance denies coverage, the patient pays the warehouse club’s cash price.

Key Takeaway: The Lilly Zepbound Savings Card drops eligible commercially insured patients to $25/month at Costco

What Are Cheaper Alternatives to Zepbound at Costco?

The three main alternatives in 2026 are Zepbound vials through LillyDirect, compounded tirzepatide through licensed telehealth, and compounded semaglutide. Each delivers significant savings versus Costco’s pen pricing.

LillyDirect vials at $349-$499 monthly are the most direct comparison. Compounded tirzepatide narrowed after the FDA’s October 2024 shortage resolution but remains available through some 503A pharmacies under individual medical necessity documentation. Compounded semaglutide remains more accessible at $179 to $349 monthly. TrimRx offers a free assessment quiz to identify which option matches a patient’s medical situation.

Does Costco Offer Mail-order Zepbound?

Yes. Costco Mail Order Pharmacy ships Zepbound to members and non-members at the same cash price as in-store. Some commercial insurance plans route to Costco Mail Order for 90-day fills at lower per-month copays.

Mail order doesn’t deliver meaningful savings for cash payers, since Lilly’s list price drives the price floor regardless of distribution channel. Insured patients with 90-day fills can sometimes drop copays $5 to $20 per month.

Zepbound requires cold-chain refrigerated shipping. Costco Mail Order uses overnight refrigerated delivery.

Can I Use HSA or FSA for Zepbound at Costco?

Yes, with proper documentation. HSA and FSA funds cover prescription weight-loss medications when the patient has a documented obesity diagnosis (BMI 30+) or weight-related comorbidity. Costco pharmacy processes the benefits card at checkout.

IRS Publication 502 requires the medication to treat a specific medical condition. A Letter of Medical Necessity from the prescriber typically supports the HSA/FSA claim. Pre-tax dollars save 22% to 37% depending on federal tax bracket.

How Does Costco Compare to Other Pharmacies for Zepbound?

Costco’s cash price for Zepbound runs $30 to $115 below most major drugstore chains. The typical 2026 pricing: Costco and Sam’s Club ($1,020-$1,075), Walmart ($1,060-$1,115), Kroger ($1,055-$1,120), CVS/Walgreens/Target ($1,069-$1,135), Rite Aid ($1,080-$1,140).

For insured patients with the Lilly savings card, every retailer ends up at $25 monthly. For cash payers, Costco is one of the cheapest brick-and-mortar options but still well above LillyDirect’s vial pricing.

Will Costco Have My Zepbound Dose in Stock?

Most Costco pharmacies stock common Zepbound doses (2.5 mg, 5 mg, 7.5 mg, 10 mg) consistently in 2026. Higher doses (12.5 mg, 15 mg) sometimes need a 1 to 3 day special order. The FDA’s October 2024 tirzepatide shortage resolution stabilized retail supply.

Costco’s regional pharmacy distribution is generally efficient. If your local Costco is out, the pharmacist can transfer the prescription to another nearby Costco or order through central fulfillment.

Bottom line: Compounded tirzepatide through telehealth runs $199 to $499 per month

FAQ

Is Zepbound Cheaper at Costco or LillyDirect?

LillyDirect’s Zepbound vials at $349-$499 monthly are significantly cheaper than Costco’s pen pricing at $1,020-$1,069. The tradeoff is that vials require self-drawing into a syringe versus using the prefilled auto-injector pen.

Does Costco’s Sam’s Club Match Zepbound Pricing?

Sam’s Club and Costco price Zepbound nearly identically, usually within $10 to $30 of each other. Both warehouse clubs serve members and non-members at the pharmacy.

Does Costco Accept GoodRx for Zepbound?

Costco accepts GoodRx coupons, but GoodRx pricing for Zepbound matches Costco’s cash price within a few dollars. Lilly’s contracts prevent third-party discount programs from offering meaningful savings on brand-name GLP-1 medications.

Can I Get Zepbound at Costco with Medicare?

Medicare Part D excludes most weight-loss medications under the 2003 Medicare Modernization Act. Patients on Medicare typically can’t get Zepbound covered and pay cash or use LillyDirect’s uninsured pathway.

Does Costco Price Zepbound Lower for Cash Than Through Insurance?

Sometimes. If your insurance copay is higher than Costco’s cash price (rare but possible with high-deductible plans), you can ask the pharmacist to run it as cash. The Lilly savings card works with cash transactions.

How Do I Switch to Compounded Tirzepatide?

A licensed prescriber needs to evaluate medical necessity and write a new prescription routed to a 503A compounding pharmacy. TrimRx offers a free assessment quiz to match patients with a personalized treatment plan and can connect eligible patients with telehealth providers offering compounded GLP-1 options.

Disclaimer: This content is for informational purposes only and does not constitute medical advice. It is not intended to diagnose, treat, cure, or prevent any disease or condition. Individual results may vary. Always consult a qualified healthcare professional before starting any weight loss program or medication.