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On the wire
The Stash EdgeISABELLA'S ISLAYSeptember 27, 20262 min readAd-free

Costco Adds $33 Billion Digital Channel Using DoorDash and Uber Eats as Fulfillment Rails

The warehouse retailer turned third-party platforms into owned distribution without building a last-mile fleet.

Jenny Huang Goodman MPA MSc MHSAThe Stash Edge · Huang GoodmanSource: Modern Retail ↗
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In plain words

Rent last-mile delivery from platforms already running the route instead of building a fleet from capital.

$33 billion
in digital sales in 2026
20 percent
according to Modern Retail
15 to 30 percent
platform fee and still return acceptable margin
40 percent
gross margin and the platform charges

Costco recorded $33 billion in digital sales in 2026, a year-over-year increase exceeding 20 percent, according to Modern Retail. The growth came primarily from partnerships with DoorDash and Uber Eats, which turned those platforms into fulfillment extensions of the warehouse without requiring Costco to operate delivery vehicles or hire drivers.

The company plugged its inventory system into the platform APIs and allowed both services to fulfill orders from local warehouses. A customer orders through DoorDash or Uber Eats, the order routes to the nearest Costco, a platform driver picks the order, and the warehouse fulfills from existing stock. Costco collects the sale, the platform takes a commission, and the customer receives bulk items without visiting the warehouse.

The mechanism works because Costco avoided the capital trap of owned last-mile logistics. Building a delivery fleet requires vehicles, insurance, labor, routing software, and management overhead. DoorDash and Uber Eats already carried those fixed costs across millions of restaurant and grocery orders. Costco paid variable fees per order instead of fixed infrastructure expense, converting a capital problem into a margin calculation. The partnership also placed Costco inventory in front of younger, urban customers who use delivery platforms as primary shopping interfaces but rarely drive to suburban warehouse locations.

The model extends to any physical product brand with predictable inventory and unit economics that survive a platform commission. A small brand selling direct does not need to build a delivery network. It needs to answer one question: can the product absorb a 15 to 30 percent platform fee and still return acceptable margin?

Start by listing the platforms already operating in your region. DoorDash, Uber Eats, Instacart, Gopuff, and regional players all maintain merchant APIs. Compare commission structures, delivery radius, and customer demographics. Choose the platform whose user base aligns with your product profile. A premium coffee subscription fits DoorDash. A bulk snack pack fits Instacart.

Next, structure the offer for platform economics. If your direct sale generates 40 percent gross margin and the platform charges 20 percent, you retain 20 percent after commission. That margin must cover pick, pack, and any platform-specific packaging. Run the math on your lowest-margin SKU first. If that product clears the hurdle, the rest of the catalog works.

Integrate inventory using the platform's merchant API or a middleware layer like Deliverect or Otter. Feed real-time stock levels so the platform never sells a product you cannot fulfill. Set geographic boundaries that match your fulfillment speed. A one-person brand operating from a garage can serve a five-mile radius. A brand with regional warehouses can cover metro areas.

Price for the channel. Do not discount to match your website. Customers using delivery platforms pay for convenience and speed, not price parity. Costco does not discount on DoorDash. The customer pays a delivery fee and accepts the trade. Your product can carry the same logic. If your direct price is $35, the platform price can be $42. The customer chose speed. Charge for it.

The broader lesson: distribution infrastructure is now rentable by the order. A small brand does not need to own logistics to reach customers in cars. It needs to identify where those customers already transact and place inventory in that stream. Costco proved the model works at $33 billion. The same rails accept a $100,000 brand.

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For the principal

Run margin math on your slowest SKU at a 20 percent platform fee before signing any merchant agreement.

For the operator

Integrate inventory APIs with two platforms in your top metro and measure incremental customer acquisition cost against owned-channel CAC.

For the house

Negotiate bulk delivery pricing with platforms for recurring corporate gifting orders instead of paying per-unit consumer rates.

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Sources and method
  • Primary report: Modern Retail, September 27, 2026.
  • Company figures can be checked against each filer's own reports on the boards: .
  • Written with artificial intelligence from public sources and published without individual human review. Corrections: jenny@pops4.com.
distributionfulfillmentplatform partnershipslast-mile logisticscost structure

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