In this article, learn about:
How to become a Walmart supplier and navigate the application and onboarding processes
What EDI integration and compliance with Walmart requires
How to avoid costly chargebacks and scale successfully with Walmart
Partnering with Walmart offers suppliers access to one of the largest retail ecosystems in the world. Walmart represents a distribution opportunity that few retailers can match, but that scale cuts both ways. Walmart operates with enterprise-grade expectations, and suppliers who want a seat at the table must be prepared to meet rigorous standards across operations, data exchange, and ongoing compliance.
To become "retail-ready" with Walmart, suppliers need more than a strong product. They must demonstrate operational maturity, technical capability, and the ability to execute consistently at high volume. From strict compliance requirements to mandated electronic data interchange (EDI), Walmart expects precision at every step — and has the systems in place to measure it.
This guide walks through the full supplier journey: getting in the door, navigating onboarding, implementing EDI, and maintaining the compliance standards that protect your relationship with one of the world's most demanding retailers.
Getting in the Door: Becoming a Walmart Supplier
Walmart evaluates suppliers based on product-market fit, pricing competitiveness, and scalability. Beyond the product itself, reliability is critical. Suppliers must prove they can meet demand, maintain consistent quality, and operate efficiently at scale — not just for an initial order, but month after month.
How to Apply
Suppliers apply through Walmart's supplier application portal, where they will need to submit detailed product information, financial documentation, and applicable certifications. The portal serves as the first filter, ensuring basic eligibility before a submission reaches a merchant.
Walmart merchants (also called buyers) ultimately decide which products are selected, making it essential to have a compelling value proposition. That means understanding your target category, knowing who you're competing against on shelf, being able to articulate why your product belongs in Walmart's assortment, and why shoppers will choose it.
Some suppliers find it beneficial to start with Walmart Marketplace (a third-party, or 3P, selling model) before pursuing a first party (1P) retail relationship. The 3P model allows brands to build a performance history, validate consumer demand, and demonstrate operational reliability before expanding into brick-and-mortar stores. For newer or smaller brands, this staged approach can be a more accessible entry point into the Walmart ecosystem — and a credible one that buyers notice.
Related Reading: Walmart Marketplace Performance Standards
Onboarding: What Happens After You're Accepted
Once approved, suppliers enter formal agreements that define terms, payment structures, and operational expectations. These agreements set the foundation for everything that follows, so it's worth taking the time to understand them thoroughly before signing.
Suppliers gain access to Retail Link, Walmart's proprietary platform for data visibility, reporting, and performance tracking. Retail Link is where you'll monitor purchase orders, track inventory, review scorecards, and analyze sales trends.
Onboarding typically includes item setup and product data submission, receiving and fulfilling initial purchase orders, and establishing baseline performance metrics. This phase is critical. How you perform out of the gate sets the tone for your relationship with buyers and signals whether you're equipped to scale.
What Is EDI and Why Does It Matter?
Electronic Data Interchange (EDI) is the standardized, system-to-system exchange of business documents. Rather than emailing spreadsheets or manually entering order data, EDI allows two companies' systems to communicate automatically using agreed-upon formats and transaction codes. For a retailer like Walmart — processing millions of transactions across tens of thousands of suppliers — EDI is a requirement.
Walmart relies heavily on EDI to automate processes, reduce errors, and maintain efficiency at scale. To work with Walmart, suppliers must support a specific set of transaction types:
850: Purchase order (Walmart sends this to initiate an order)
855: Purchase order acknowledgment (supplier confirms receipt and details)
856: Advance ship notice / ASN (supplier notifies Walmart before shipment arrives)
810: Invoice (supplier requests payment)
Each of these transactions must be accurate, timely, and fully compliant with Walmart's specific EDI specifications, which can differ from other retailer implementations of the same transaction sets.
EDI Options for Suppliers
Suppliers typically choose between building direct EDI integration in-house or working with a third-party EDI solution provider. Direct integration offers more control but requires significant internal technical resources and ongoing maintenance. Given Walmart's strict and detailed requirements, many suppliers — particularly mid-market companies without large IT teams — opt for solution providers to reduce complexity, accelerate implementation, and ensure accuracy.
Whichever path you choose, EDI readiness should be prioritized early. Delays in EDI setup can hold up purchase orders, shipments, and payments, creating friction at the worst possible time in a new supplier relationship.
Compliance at Walmart
Operational Compliance
Walmart enforces detailed routing guides that govern how shipments must be packaged, labeled, and delivered. These guides specify everything from carton dimensions and pallet configurations to label placement and carrier requirements. Failure to follow routing guides can result in shipments being refused, delayed, or penalized even if the product itself is correct.
Financial and Invoice Compliance
Invoices must match POs and ASNs precisely. Even small discrepancies such as quantity mismatch, a price difference, a missing reference number, can trigger deductions or delayed payments.
Walmart's accounts payable processes are largely automated, which means errors don't get caught and corrected by a human before they become a problem. They get flagged, deducted, and require the supplier to dispute.
Performance Metrics
Walmart tracks supplier performance using metrics like On-Time, In-Full (OTIF), which measures whether orders arrive on time and complete. OTIF compliance is closely monitored, and suppliers that consistently fall short face chargebacks and potential limitations on future order opportunities. Scorecards are updated regularly, making consistent execution essential.
Avoiding Chargebacks and Common Compliance Errors
The most frequent compliance errors that result in chargebacks are:
Incorrect or incomplete EDI data
Late or inaccurate shipments
Non-compliant labeling or packaging
Many of these are preventable with the right processes in place.
Beyond the direct financial penalties, non-compliance strains your relationship with buyers and can reduce your visibility for future opportunities. A supplier that causes frequent operational headaches, even unintentionally, is less likely to be selected for new item tests, expanded distribution, or promotional placements.
Related Reading: How to Dispute a Walmart Deduction
Best Practices for Long-Term Success
Successful suppliers have strong internal process alignment between their supply chain, finance, and IT teams. It is important to invest in real-time monitoring of EDI transactions and shipments so issues are caught before they escalate. Suppliers should also treat Walmart's performance data as a continuous improvement tool rather than a report card to review after the damage is done.
Leveraging Walmart's Systems for Growth
Retail Link provides valuable insights into sales trends, inventory levels, and demand forecasting. Suppliers should actively engage with this data in order to better optimize replenishment cycles, reduce out-of-stock events, and align their production planning with real consumer demand.
As performance improves and trust builds, suppliers can expand from regional to national distribution, explore omnichannel opportunities across in-store and e-commerce channels, and position themselves for more strategic conversations with buyers.
Conclusion
Succeeding with Walmart demands operational excellence. Suppliers must invest in EDI capabilities, maintain strict compliance across every touchpoint, and build scalable systems that can support long-term growth without sacrificing accuracy or reliability.
For many suppliers, that readiness becomes a genuine competitive advantage at Walmart. Suppliers who can execute consistently, integrate seamlessly, and use Walmart's data tools effectively are best positioned to grow within one of the world's most powerful retail ecosystems.
Simplifying EDI With SPS Commerce
Connecting with Walmart doesn't have to mean navigating EDI complexity on your own. With SPS Commerce, suppliers can automate transactions, improve accuracy, and stay compliant with Walmart's requirements — without the overhead of managing it all in-house.
