Founders who ask us how to sell to Costco usually expect the answer to be about the pitch. It is not. Costco is the one major U.S. retailer where the decision is made almost entirely on two things you control before you ever meet a buyer: whether your cost structure survives club pricing, and whether you can physically supply the volume a single item generates across a 600-plus warehouse network. Brands that fix those two things first get meetings. Brands that lead with a deck do not.
Brand Refinery is a CPG consulting firm that helps consumer brands enter the U.S. market and win retail partnerships with Costco, Walmart, Target, Kroger and Whole Foods. This guide covers how Costco's buying model actually works, the margin math behind the club channel, the two realistic routes in, the operational requirements that sink unprepared brands, and how to judge whether Costco is right for you at this stage.
How Costco Buys: Fewer Items, Much Bigger Commitments
Costco is not a grocery store with a bigger footprint. It is a different business model, and every rule that follows comes from one fact: a typical Costco warehouse carries roughly 3,700 to 4,000 SKUs, against 30,000 or more in a conventional supermarket.
That constraint produces three consequences for your brand:
- Every item you get is taking a slot from something already selling. A Costco buyer is not adding your product to a set. They are replacing an item that works with one they believe will work better. Your pitch has to beat an incumbent, not fill a gap.
- One item does the volume of a whole line elsewhere. Because the assortment is narrow and the member base is enormous, a single accepted item moves quantities that would require dozens of doors in grocery. That is the upside, and it is also the risk: you have to be able to make it.
- The commitment is regional or national, rarely a handful of stores. Costco operates 12 U.S. regions. Buyers typically start you in one or two regions, not five test stores. As of fiscal 2026 Costco operates 931 warehouses worldwide, including 639 in the United States and Puerto Rico, having begun the year at 914 and guiding to roughly 940 by year end. Even one region is a serious production commitment.
If you cannot fund and produce a regional rollout, a yes from Costco is a cash flow crisis, not a win. Model this before you pitch.
The Costco Margin Math: The 14 Percent Markup Cap
Costco famously caps its own markup at 14 percent on national brands and 15 percent on Kirkland Signature, with an internal target closer to 11 percent across total cost of goods sold. This is an internal operating rule rather than a disclosed policy in Costco's SEC filings, but it is consistent, well documented, and it explains everything about how Costco negotiates.
Here is what it means for you in practice.
Costco does not take a big margin. It takes a low price. A conventional grocery retailer might take 30 to 40 percent of retail. Costco takes roughly 14 percent. That sounds generous until you realise where the pressure lands: Costco reaches its member price by pushing your cost down, not by accepting a thinner margin. The value the member sees is funded out of your cost of goods, not out of Costco's markup.
Your Costco price has to be materially below your other channels. Because Costco sells in club packs and prices to be the best value in the category, the per-unit cost it will accept typically sits well below what you charge a distributor or a grocery chain. Many brands find the workable gap is in the range of 15 percent or more below their standard wholesale rate once pack size is accounted for. Whether that gap is survivable depends entirely on your cost of goods at club volume.
Volume has to do the work your margin used to do. The model only functions if manufacturing scale drops your unit cost enough to protect contribution margin. If your co-packer cannot give you a materially better price at ten times the run size, Costco will be a low-margin or negative-margin channel for you. Run this calculation with your co-packer before the first conversation, not after the purchase order.
Channel conflict is real and it is permanent. A club pack priced at club value will be compared by your grocery buyer, your distributor and your DTC customers. Differentiated pack sizes, counts or formats are how established brands manage this, and Costco expects a distinct item anyway. Plan the architecture; do not improvise it.
Our guide to what it actually costs to launch a consumer brand in the U.S. walks through the wider cost stack that sits behind these numbers.
Route 1: The Roadshow
For most emerging brands, the roadshow is the realistic first door, and it is underused.
A Costco roadshow is a temporary in-warehouse event, typically a week or two, where your team demonstrates and sells the product from a dedicated space. The requirements to be accepted for a roadshow are meaningfully lighter than for full vendor status, which is precisely why it exists as an entry point.
What a roadshow actually asks of you:
- You staff it. Your people, not Costco's, work the booth for the duration.
- You deliver and manage the inventory. Getting product to the warehouse and keeping the display stocked is your responsibility.
- Product is generally on consignment. You are paid for what sells, which means unsold inventory comes back to you and the working capital risk is yours.
What you get in return is the only data a Costco buyer fully trusts: real sell-through, to real Costco members, in a real warehouse. Brands that perform strongly across a roadshow circuit frequently attract regional and then national buyer attention. Treat the roadshow as a paid trial that produces evidence, and budget for staffing, travel and unsold stock accordingly.
Route 2: The Buyer Introduction
The formal path is a vendor inquiry submitted to Costco's corporate buying organisation, directed at the specific buyer for your category and region. Costco buyers are few, they manage enormous categories, and the volume of inbound they receive means an unremarkable submission goes nowhere.
What improves the odds:
- A broker or manufacturer's representative with live Costco placements. The strongest club brokers know what a buyer is missing this quarter and can time your approach to the category review. Check references against brands they claim to have placed, and be wary of any broker without a current placement.
- Proof of velocity in a comparable channel. Strong performance at another club or mass retailer, or a documented roadshow result, is the evidence that converts.
- A single item, not a line. Lead with the one product that has the clearest value story at club pack size. Costco buyers are choosing an item.
- Regional focus. Approaching one regional buyer with a credible plan for that region is far more realistic than asking for national distribution.
What Costco Requires Before You Ship
These are the operational gates. Failing them after a yes is how brands lose the account in the first year.
Club packaging is a separate SKU. Costco items are multipacks or club sizes, designed to sell from a pallet or a steel shelf rather than a grocery gondola. That means separate artwork, a separate UPC, a separate case configuration and pallet specifications that meet Costco's requirements. Budget for the design and tooling as a distinct project.
EDI is mandatory. Purchase orders, advance ship notices and invoices run through EDI. Labeling errors, missed ship windows and inaccurate ASNs generate automatic chargebacks that are deducted from your invoices. If you do not have EDI capability, solving it is a prerequisite, not a follow-up task.
Production capacity has to be demonstrable. Buyers will ask directly what your co-packer can produce and how fast you can replenish. A commitment you cannot meet is worse than a smaller commitment you can.
Insurance, food safety and audit documentation. Expect requirements for product liability coverage, third-party food safety certification where applicable, and full regulatory compliance documentation. Our FDA labeling guide covers the labeling side.
Membership. Costco is a membership business and vendors are generally expected to hold one. A Gold Star membership runs $65 a year and the Executive tier $130 as of 2026.
The Pitch That Works at Costco
Strip out everything a grocery pitch contains that Costco does not care about, and what is left is short:
- The member value proposition in one sentence. What does a Costco member get here that they cannot get at this price anywhere else? If you cannot say it in a sentence, the item is not ready.
- The item, at club pack size, with the exact member price. Not a range. Not a line. One item, one price.
- Your delivered cost and where it goes at volume. Show the buyer you have done the manufacturing math.
- Proof of velocity. Roadshow results, club performance elsewhere, or hard category data from Circana, NielsenIQ or SPINS.
- Supply capability. Co-packer, capacity, lead time, replenishment plan, EDI readiness.
- The region you are asking for, and why that region.
Costco buyers reward brands that arrive with the answer already worked out. They have very little patience for brands that want to explore.
Is Costco Right for Your Brand Right Now?
Costco is the wrong first retailer for most emerging brands, and the right second or third one for many. The honest test is four questions:
- Does your cost of goods at ten times current volume leave a defensible contribution margin at club pricing?
- Can your co-packer produce a regional commitment without a capital raise you have not closed?
- Can you fund 30 to 60 day payment terms on a very large order?
- Do you have a plan for what club pricing does to your grocery and DTC pricing?
Four yes answers means go. Any no means fix that first. A club account you cannot service costs you the account and the reputation.
How Brand Refinery Helps
We work with founders on exactly this sequence: the club cost model, the pack architecture, the co-packer capacity conversation, the roadshow plan, the buyer materials and the EDI and compliance readiness that has to exist before the first purchase order. Our retail partnerships work covers Costco alongside Walmart, Target, Kroger and Whole Foods, and our Walmart guide covers the mass channel equivalent.
If you are weighing the club channel this year, book a call and we will pressure-test the numbers with you before you approach a buyer.
Frequently Asked Questions
How do you sell your product to Costco?
There are two realistic routes. The first is a Costco roadshow, a temporary in-warehouse selling event where you staff the booth, supply the inventory on consignment and generate real sell-through data that buyers trust. The second is a vendor inquiry to the buyer for your category and region, ideally introduced by a broker with current Costco placements. Both routes require club-specific packaging, EDI capability and proven production capacity before Costco will issue a purchase order.
What margin does Costco take from suppliers?
Costco caps its markup at approximately 14 percent on national brand items and 15 percent on its Kirkland Signature private label, with an internal target of around 11 percent across total cost of goods sold. This is substantially lower than conventional grocery, but it does not mean Costco is an easy margin channel for brands. Costco reaches its member price by negotiating your cost down rather than by accepting a wider retail markup, so the pressure falls on your cost of goods.
What is a Costco roadshow and how does it work?
A Costco roadshow is a temporary in-warehouse event, usually one to two weeks, in which a brand sells and demonstrates its product from a dedicated space inside the warehouse. The brand staffs the booth, delivers and stocks the inventory, and is typically paid only for units sold because product is on consignment. Requirements are lighter than full vendor status, which makes roadshows the most common entry point for small and mid-size brands.
Does Costco require different packaging from grocery?
Yes. Costco items are club packs or multipacks built to sell from pallets and steel shelving rather than a grocery gondola, so they require a separate SKU, separate UPC, separate artwork and a case and pallet configuration that meets Costco's specifications. A brand cannot ship its standard grocery item to Costco. Treat the club pack as a distinct product development project with its own design and tooling budget.
How many SKUs does a Costco warehouse carry?
A typical Costco warehouse carries roughly 3,700 to 4,000 SKUs, compared with 30,000 or more in a conventional supermarket. This narrow assortment is why Costco buyers are effectively replacing an existing item rather than adding to a set, and why a single accepted item generates volume that would take dozens of grocery doors to match.
This article is general information for brand operators and is not legal, regulatory or financial advice. Retailer requirements change; confirm current terms with Costco directly or with your broker before making commitments.