EDI for Costco — full spec, timelines and integration
In short: Costco requires suppliers to exchange EDI 850, 855, 856, 810, 820, 852, 997 via EDI. This page covers the Costco EDI spec, AS2 or VAN transport, mandatory chargeback SLAs, ASN/label requirements, and how to get compliant in 2-4 weeks with a pre-built Costco template on EDIconnect.
Key capabilities
- Pre-built Costco spec: Every mandatory field, code, envelope value and validation rule from the current Costco EDI implementation guide.
- Chargeback-safe ASN: GS1-128 SSCC label generation, pack hierarchy, timing rules — the exact combination that survives Costco's DC receiving.
- AS2 or VAN transport included: Certificates, endpoints and connection testing with Costco's EDI/VAN team — end-to-end, not just software.
- Live in 2-4 weeks: From contract to first production PO with Costco — mapping, testing and go-live handled by EDIconnect.
Costco EDI onboarding — the critical steps
Costco's vendor onboarding is compressed and unforgiving: from vendor-code assignment to first production PO is typically 2-6 weeks, and any EDI failure delays merchandising launch. The winning pattern: assign the EDI spec to an experienced provider on day 1, run integration tests in parallel with item setup, and be certification-ready before the first PO drops.
EDIconnect's Costco template has been in production with dozens of suppliers — the spec quirks, the label format edge cases, the SLA windows are all pre-configured. Suppliers we've onboarded typically hit zero chargebacks in the first 90 days.
Frequently asked questions
What EDI documents does Costco require?
Costco typically requires EDI 850, 855, 856, 810, 820, 852, 997. Exact transaction set version and mandatory segments depend on your division/vendor category.
How do I get EDI-compliant with Costco?
1) Get the Costco EDI implementation guide from vendor portal. 2) Choose an EDI provider with a proven Costco template. 3) Complete Costco's EDI testing/certification. 4) Go live on the first PO.
Which transport protocol does Costco use?
Costco supports AS2 direct or major VANs (SPS, TrueCommerce, OpenText). Strict SSCC-18 label and ASN timing rules — DC receiving is fully automated.
What are Costco's EDI chargebacks?
Common categories: late ASN, missing SSCC label, PO-ship quantity mismatch, missing 997, mismatched carrier — each with a per-occurrence or percentage-of-invoice penalty.
Can EDIconnect handle this for me?
Yes. The Costco template is pre-built and battle-tested. Your team never touches EDI schemas — you focus on filling POs; we handle 850/855/856/810/997 automatically.