Walmart EDI Compliance Guide
Meet Walmart's EDI compliance requirements without the complexity
Quick Answer
Walmart requires EDI 850 (Purchase Order), EDI 855 (PO Acknowledgment), EDI 856 (Ship Notice (ASN)), EDI 810 (Invoice), EDI 997 (Functional Acknowledgment), EDI 846 (Inventory Inquiry) from all suppliers. Non-compliance triggers chargebacks including late ASN: $500+ per shipment.
Walmart is the world's largest retailer, requiring strict EDI compliance from all suppliers. Their OTIF (On Time In Full) program penalizes late or incomplete shipments, and their EDI requirements include mandatory ASN (856), purchase order acknowledgment (855), and invoice (810) transactions.
Required EDI Transactions
Walmart requires suppliers to support the following EDI transaction types. Click any transaction to view our detailed guide with segment breakdowns and examples.
Compliance Requirements
Here is what Walmart expects from EDI-compliant suppliers:
- EDI 850 Purchase Order receipt and processing
- EDI 855 PO Acknowledgment within 24 hours
- EDI 856 ASN with SSCC-18 barcodes before shipment arrives
- EDI 810 Invoice matching PO and ASN data
- EDI 997 Functional Acknowledgment for all inbound transactions
- OTIF compliance: 98% on-time, 95% in-full targets
- GS1-128 barcode labeling on all cartons
- Retail Link access for inventory and sales data
Chargeback Penalties
Non-compliance with Walmart's EDI requirements can result in significant financial penalties:
Common Walmart Chargebacks
- Late ASN: $500+ per shipment
- Missing or incorrect SSCC-18: $500 per carton
- OTIF failure: 3% of COGS for non-compliance
- Incorrect invoice data: deduction from payment
How to Achieve Walmart EDI Compliance
Getting compliant with Walmart 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 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 Walmart-specific compliance requirements before syncing to your ERP.
Related Guides and Articles
Learn more about Walmart EDI requirements and compliance best practices:
Test Your EDI Compliance
Upload your EDI documents to our free inspector and check for compliance issues before sending to Walmart.
Open EDI InspectorFrequently Asked Questions
What EDI transactions does Walmart require?
Walmart requires EDI 850 (Purchase Order), EDI 855 (PO Acknowledgment), EDI 856 (Ship Notice (ASN)), EDI 810 (Invoice), EDI 997 (Functional Acknowledgment), EDI 846 (Inventory Inquiry). Each transaction must meet Walmart's specific formatting and timing requirements.
What happens if I'm not EDI compliant with Walmart?
Non-compliance triggers chargebacks that can range from $200 to $5,000+ per incident depending on the violation. Repeated non-compliance can lead to supplier suspension or loss of the retail account.
Can OrderSync help with Walmart EDI compliance?
Yes. OrderSync supports all EDI transaction types required by Walmart 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.