Costco EDI Compliance Guide
Meet Costco's supplier EDI and compliance standards
Costco requires EDI 850 (Purchase Order), EDI 856 (Ship Notice (ASN)), EDI 810 (Invoice), EDI 997 (Functional Acknowledgment) from all suppliers. Non-compliance triggers chargebacks including invoice mismatches: payment holds and deductions.
Costco Wholesale requires EDI compliance from suppliers shipping to their 600+ warehouse locations. Costco uses both depot (cross-dock) and direct delivery models depending on product category. Their requirements focus on accurate purchase order processing, timely ASN submission, and invoice accuracy to support their high-volume warehouse model. Costco uses an internal item numbering system separate from UPC codes.
Required EDI Transactions
Costco requires suppliers to support the following EDI transaction types. Click any transaction to view our detailed guide with segment breakdowns and examples.
Costco-Specific Transaction Requirements
- EDI 810 (Invoice): Costco matches invoices against the PO exactly. Price variances trigger payment holds rather than partial payments.
- EDI 850 (Purchase Order): Costco POs reference Costco item numbers, which are separate from your UPCs. Your item cross-reference table has to be right or every downstream document inherits the error.
- EDI 856 (Ship Notice (ASN)): ASNs must arrive before the truck does, with SSCC-18 pallet labels that scan against the ASN contents. Depot cross-dock shipments are unforgiving on this point.
Compliance Requirements
Here is what Costco expects from EDI-compliant suppliers:
- EDI 850 Purchase Order receipt and processing
- EDI 856 ASN submission before shipment arrival
- EDI 810 Invoice matching PO data exactly
- EDI 997 Functional Acknowledgment
- Pallet-level tracking with SSCC-18 barcodes
- Costco supplier portal compliance
- Strict routing guide adherence
- Product labeling per Costco specifications
Chargeback Penalties
Non-compliance with Costco's EDI requirements can result in significant financial penalties:
On the missing dollar amounts. Costco publishes its fee schedule to suppliers through a portal that requires a login, so we have no public document to cite. Rather than print a number we cannot stand behind, we list the consequences and leave the amounts to their own guide. Confirm both the amount and the unit there, because programs charge per PO, per shipment or per carton and the unit changes what you owe more than the figure does.
Common Costco Chargebacks
- Invoice mismatches: payment holds and deductions
- Labeling non-compliance: shipment rejection
How to Set Up EDI with Costco
- Get your vendor agreement and routing instructions from your Costco buyer.
- Register your EDI identifiers with Costco's EDI team and confirm the document set for your delivery model (depot cross-dock versus direct).
- Build your Costco item number cross-reference and validate it against the first test POs.
- Test 850 receipt, 856 timing, and 810 matching until they run clean, then go live.
How to Achieve Costco EDI Compliance
Getting compliant with Costco requires three things: an EDI platform that supports all required transaction types, automated validation that catches errors before they trigger chargebacks, and integration with your ERP so orders flow through without manual re-entry.
EDI transaction formats follow ASC X12 standards, and product identification uses GS1 GTIN and GS1-128 barcode specifications. Both are required by virtually every major US retailer.
OrderSync handles all three compliance layers. Our purchase order automation platform processes EDI transactions (850, 855, 856, 810, 997) alongside PDF, CSV, and email orders through a single pipeline. Automated validation checks every order against your product catalog, pricing rules, and Costco-specific compliance requirements before syncing to your ERP.
Related Guides and Articles
Learn more about Costco EDI requirements and compliance best practices:
Related Resources
How to Answer "Are You EDI Capable?"
A buyer asked, and you need to answer this week. The four things they are checking, what you can say yes to today, and a realistic date for the rest.
- What a buyer is really asking when they ask this
- The minimum set-up that makes the answer yes
- What you can answer today versus what needs building
- Rough timelines, so you can give a date rather than a maybe
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Test Your EDI Compliance
Upload your EDI documents to our free inspector and check for compliance issues before sending to Costco.
Open EDI InspectorFrequently Asked Questions
Costco requires EDI 850 (Purchase Order), EDI 856 (Ship Notice (ASN)), EDI 810 (Invoice), EDI 997 (Functional Acknowledgment). Each transaction must meet Costco's specific formatting and timing requirements.
It depends on the violation and on how Costco charges for it: programs bill per purchase order, per shipment or per carton, and the unit changes what you owe more than the headline figure does. Beyond the deductions, repeated non-compliance affects your vendor scorecard and can lead to supplier suspension or loss of the account. Costco publishes its current schedule to suppliers directly.
Yes. OrderSync supports all EDI transaction types required by Costco and includes automated validation to catch compliance errors before documents are sent. Our platform processes EDI alongside PDF, CSV, and email orders through a single pipeline.
Yes, for ongoing warehouse suppliers. Costco transmits purchase orders by EDI and expects ASNs and invoices back electronically. Some regional or one-off programs start on manual ordering, but volume suppliers are expected to trade EDI.
The core set is the 850 purchase order inbound, with the 856 ASN, 810 invoice, and 997 functional acknowledgments going back. Specific programs can add documents, so confirm the exact set with Costco's EDI team during onboarding.
Costco's depot model cross-docks freight within hours of arrival. If the ASN is late or does not match the pallets, receiving falls back to manual checking, and Costco bills that disruption back to the supplier.