Shipping to Walmart: Marketplace, WFS, EDI, and OTIF

Marketplace, WFS, DSV, and 1P

Walmart runs four distinct supplier programs and the operational requirements differ sharply between them. Pick the wrong lane and your unit economics will not work.

Walmart Marketplace and Seller Center

Walmart Marketplace went live broadly in 2016 and has grown to serve hundreds of thousands of third-party sellers. Onboarding is gated. You apply through Seller Center, you provide a US business tax ID, primary product categories, and your UPC count. Approval typically takes 1 to 2 weeks. Walmart vets sellers more strictly than Amazon, prioritizing brands with ecommerce track record^[1].

Once approved you have two fulfillment paths: ship from your own warehouse (Seller Fulfilled) or ship via Walmart Fulfillment Services. Seller Fulfilled requires you to hit Walmart’s shipping performance metrics, the most important being on-time delivery rate (target 99%), valid tracking rate (target 99.5%), and cancellation rate (under 1.5%). Miss any of these for sustained periods and Walmart caps your account or removes the buy box.

Walmart Fulfillment Services in detail

WFS launched in 2020 as Walmart’s answer to FBA. Inventory ships from your facility into a Walmart fulfillment center. From there Walmart picks, packs, ships, handles returns, and provides customer service. WFS items get the 2-day delivery badge on walmart.com and qualify for Walmart+ free shipping. WFS pricing is generally lower than FBA on small standard units but the gap closes on bulky items^[2].

The WFS inbound process: create the shipment in Seller Center, generate warehouse-direction labels, apply WFS-specific item labels (similar to FNSKU), palletize per spec, and book through Walmart’s preferred carriers or arrange your own. Walmart enforces case-pack consistency tightly. If you say a master case holds 24 units, every case better hold exactly 24, because mixed-quantity cases get flagged at receive and the SKU stays unsellable until reconciled.

EDI requirements (850, 856, 810, more)

For 1P vendor and DSV, EDI is mandatory. Walmart uses ANSI X12 transactions. The minimum stack you must support before your first PO:

Walmart partners with several VANs (Value-Added Networks) and direct AS2 connections. Most mid-size suppliers use a managed EDI provider (SPS Commerce, TrueCommerce, DiCentral) to translate to and from their ERP. Direct AS2 is cheaper at scale but requires in-house integration work.

“Walmart fines suppliers 3% of the cost of goods sold for any pallet, case, or unit that arrives outside the on-time, in-full window.”

OTIF: On-Time In-Full

OTIF is the metric that defines whether you can profitably supply Walmart at scale. On-Time means the truck arrives at the DC within the appointment window. In-Full means every line and every quantity on the PO actually shows up. Walmart raised the OTIF bar to 98% for full-truckload suppliers and 95% for less-than-truckload, with a 3% fine on the cost of goods sold for any miss^[3].

What counts as a miss: arriving even one minute outside the appointment, short-ship on any line item, wrong UPC, wrong case-pack, missing ASN, ASN sent after the truck arrived. Walmart also fines for over-shipment because it disrupts DC slotting.

The two mistakes most often miss OTIF: appointments scheduled too tight to absorb traffic or weather, and ASN data that does not match what is on the truck. Build a buffer of 24 to 48 hours between case-ready date and appointment date, and reconcile the ASN against the BOL before the driver leaves your dock.

The Walmart Routing Guide

The Walmart Routing Guide is the master document for inbound freight. It specifies carrier selection, freight terms, appointment scheduling through the Carrier Pickup Request (CPU) system, label placement, pallet specs, and chargebacks for non-compliance. It is published through Supplier Center and updated several times a year^[4].

Two routing programs dominate. Prepaid means you select the carrier and pay for freight; Walmart specifies the appointment and the lanes you may use. Collect means Walmart selects the carrier and pays freight, then deducts the cost from your invoice; you must tender the freight to the assigned carrier within the routing window.

Supplier Center and Retail Link

Supplier Center is Walmart’s portal that consolidated several legacy tools (Retail Link, Supplier One, NOVA) into a unified merchant-and-supplier interface. You manage POs, ASNs, scorecards, OTIF performance, item setup, fines, and disputes inside Supplier Center^[5].

Retail Link still exists for deep analytics: store-level POS, weekly sell-through, inventory positions, traited assortment, and forecasting. If you have a category buyer, they live in Retail Link. If you have an ops team, they live in Supplier Center.

Drop-Ship Vendor program

DSV lets you sell on walmart.com without sending inventory to Walmart. You receive an EDI 940 for each consumer order, you ship from your warehouse, and you send back an EDI 945 with tracking. The brand of record on the package is Walmart, not yours.

DSV onboarding is more selective than Marketplace. Walmart looks for brands with an existing 1P relationship or with retail credibility, plus warehouse capability to hit 1- and 2-day SLAs. The DSV program also requires the same EDI stack as 1P, plus inventory-feed integration via EDI 846 to keep walmart.com stock in sync^[6].

DSV economics are appealing for low-velocity, high-margin SKUs and for oversized items where shipping into a Walmart DC is uneconomic. The risk is the SLA: Walmart measures your ship-by-date compliance and penalizes lateness, missing tracking, and cancellations.

Common deductions and how to fight them

Walmart deducts non-compliance fees automatically against your remittance. The largest categories:

File disputes through APDP (Accounts Payable Dispute Portal) within 6 to 12 months of the deduction date. Disputes need backing documents: signed BOL, proof of delivery, ASN receipt, photos of pallet condition, and DC receipt records. Brands that build a deduction-recovery process recover 30 to 50% of disputed deductions in our experience.

“Compliance is not a cost center, it is a margin center. The supplier with clean data wins on the scorecard and gets favored in joint business planning.”

The supplier tech stack you actually need

For a brand selling 1P or DSV at scale, the minimum tech stack is: an ERP or NetSuite instance with item master and PO management, an EDI translator (SPS Commerce or equivalent), a WMS that supports GS1-128 case labels and SSCC generation, and a transportation management layer (in-house or 3PL-provided) that can produce Walmart-compliant BOLs.

For Marketplace and WFS only, the minimum is far smaller: a listing tool (Channel Advisor, Helium 10, or your ecommerce platform’s integration), inventory sync, and order routing. Most Shopify-native brands run Walmart Marketplace with the same stack they already use for Amazon SFP.

Practical patterns for working with Walmart

Three patterns we see in brands that scale on Walmart:

1. 1
   Hire a Bentonville-based broker for 1P launch
   A category broker with Walmart relationships shortens line review cycles from a year to a quarter. Pay 3 to 5% of revenue, expect to renegotiate yearly.
2. 2
   Treat OTIF as a daily metric, not a quarterly one
   Build a Slack alert against your OMS that pings if any open PO is at risk of missing the MABD window 72 hours out. The cost of expediting is almost always lower than the OTIF fine.
3. 3
   Build a deductions recovery workflow
   One person, one dashboard, one weekly cadence to file disputes through APDP. The recovery rate funds the role several times over.

What changed in 2025 to 2026

Walmart has tightened on three fronts. Marketplace listing approvals are more selective, with category restrictions on supplements, beauty, and electronics requiring brand registry or authorized-reseller documentation. WFS expanded to more DCs and added bulky-item support, narrowing the gap with FBA on big and tall categories. And Supplier Center continues to consolidate legacy tools, with NOVA (the deductions tool) folded into the unified portal in 2024^[7].

Externally, Walmart’s push into automated fulfillment (the Symbotic-powered high-tech distribution centers) has changed receiving cadence at certain DCs. Cases now need to be palletized in a way that supports automation: consistent face, consistent label orientation, consistent SSCC placement. The routing guide reflects these changes DC by DC.

Pre-flight compliance checklist

1. [src-1]Sell on Walmart Marketplace (Walmart)— Walmart
2. [src-2]Walmart Fulfillment Services overview— Walmart
3. [src-3]Walmart raises OTIF threshold— Supply Chain Dive
4. [src-4]Walmart Supplier Routing Guide— Walmart Supplier Center
5. [src-5]Supplier Center help— Walmart Supplier Center
6. [src-6]Drop ship vendor program— Walmart
7. [src-7]Walmart automation and Symbotic— Walmart Corporate
8. [src-8]Walmart 10-K fiscal 2024— SEC EDGAR
9. [src-9]EDI 850 / 856 / 810 reference— X12
10. [src-10]GS1-128 label specification— GS1