# 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.*

By **Jenny Huang Goodman MPA MSc MHSA, Principal** — The Stash Edge, Hako Shikin LLC.
Published 2026-09-27.

Canonical: https://www.pops4.com/stash/articles/costco-2026-09-27t18-1
Subject: Costco
Tags: distribution, fulfillment, platform partnerships, last-mile logistics, cost structure

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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.

## The takeaway

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

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## Publisher

**Hako Shikin LLC** — Virginia Beach, Virginia. Founded 1997. ASI 217876 · DUNS 18-204-6339.
Principal and author: **Jenny Huang Goodman MPA MSc MHSA**.

- Author: https://www.huanggoodman.com/about
- LLM context: https://www.pops4.com/stash/llms.txt
- MCP endpoint, for AI agents: https://mcp.pops4.com/mcp
- Client dashboard: https://dashboard.pops4.com/
- Catalogue: 70,000+ products, 200+ brands