EDI 846 is a powerful tool to streamline a company’s business. Using it, trading partners can identify products’ inventory in warehouses and distribution centers. EDI 846 is a ‘catalog’ that provides real-time access to current product availability and updated inventory data.
Understanding EDI 846 is the first step toward automating supply chain operations and processes.
What is EDI 846? Inventory Inquiry/Advice Explained
EDI 846, also known as an Inventory Inquiry/Advice, is an electronic data interchange (EDI) transaction set used to communicate inventory levels between trading partners. This bi-directional document allows both buyers and sellers to share real-time updates on product availability, stock quantities, and restocking information across warehouses, distribution centers, and retail locations.
EDI 846 is essential in drop shipping and eCommerce environments where retailers manage online storefronts and need up-to-date supplier inventory without relying on manual portals or phone calls.
How the 846 Transaction Set Works
The EDI 846 can be sent by either party in a trading relationship. Retailers send an inventory inquiry to request current stock levels from suppliers. Suppliers send an inventory advice to share what products are available, out of stock, discontinued, or expected to be replenished. Because the 846 is bi-directional, it supports continuous, automated communication in both directions.
Most retailers transmit EDI 846 documents daily or multiple times per day to keep eCommerce listings accurate and avoid overselling. Suppliers also send frequent updates so that trading partners can adjust ordering, plan warehouse replenishment, and display accurate product availability to consumers.
ANSI X12 Format and EDI Standards
The 846 transaction set follows the ANSI X12 format, a standard maintained by the American National Standards Institute (ANSI) and the Accredited Standards Committee (ASC X12). This standard defines how electronic business documents are structured and exchanged across industries in North America. Outside North America, the UN/EDIFACT standard serves a similar purpose, with both systems sharing comparable structure and functionality.
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What are The Key Components of an EDI 846 Document?
An EDI 846 document contains structured data about current and forecasted inventory. Manufacturers, suppliers, and resellers use this transaction set to communicate stock availability, inventory location, and product status to their trading partners.
EDI 846 Data Elements
The information found in an EDI 846 file typically includes:
- Date and time of the inquiry or advice
- Retailer and vendor identification
- Product identifiers (SKU, UPC, GTIN)
- Unit of measure
- Current inventory levels by location
- Estimated restock or replenishment dates
- Notices of discontinued or back-ordered items
- Forecasted inventory quantities
Inventory Quantity Types in an EDI 846
On-Hand, In-Transit, Backorder, and Committed Quantities
The 846 transaction set can express inventory in several ways, giving trading partners a detailed picture of stock status:
- Quantity on hand — products physically available in a warehouse or distribution center
- Quantity in transit — stock currently being shipped between locations
- Committed quantity — inventory already allocated to existing orders
- Backorder quantity — items ordered but not yet available
- Quantity in float — stock moving through internal processes
- Returns — products returned and potentially available for resale
This level of detail helps buyers make informed purchasing decisions and helps suppliers manage fulfillment more effectively.
EDI 846 Segment Structure
ISA, GS, ST, BIA, and LIN Segments Explained
EDI 846 documents are transmitted in a structured X12 format designed for machine-to-machine processing. The raw EDI data is typically translated by EDI software into a human-readable format. Key segments include:
- ISA (Interchange Control Header) — identifies the sender and receiver, along with the date and time of the EDI transaction
- GS (Functional Group Header) — marks the beginning of the transaction group and assigns a functional identifier code
- ST (Transaction Set Header) — identifies the document type; an EDI 846 is recognized by the “ST*846” sequence
- BIA (Beginning of Inquiry/Advice) — signals the start of the inventory content
- LIN (Line Item Identification) — contains product-level inventory data; each LIN loop identifies a product by its UPC or other identifier and includes quantity (QTY), product description (PID), and date recorded (DTM)
- CTT (Transaction Totals) — summarizes the total number of line items in the document
How is EDI 846 Used?
1. When Sent by a Retailer (Inventory Inquiry)
Retailers send an EDI 846 inventory inquiry to request up-to-date stock levels from their suppliers. This is common in drop shipping and omnichannel fulfillment models where the retailer does not hold physical inventory. Frequent transmission — often multiple times per day — keeps eCommerce storefronts accurate, reduces overselling, and ensures customers see real-time product availability.
2. When Sent by a Supplier (Inventory Advice)
Suppliers send an EDI 846 inventory advice to share their current stock status with trading partners. This includes notifying buyers about available inventory, out-of-stock items, discontinued products, and expected replenishment dates. Suppliers may also use the 846 to advise partners of overstocked inventory available at discounted prices, giving buyers the opportunity to place special orders.
EDI 846 in Drop Shipping and eCommerce
EDI 846 is particularly critical in drop ship environments. Because the retailer never physically handles the product, accurate and frequent inventory updates from the supplier are essential. Without timely EDI 846 transmissions, eCommerce websites risk displaying inaccurate stock levels, leading to customer frustration, cancelled orders, and lost trust.
What Are the Benefits of Using EDI 846?
Real-Time Inventory Visibility for Trading Partners
The EDI 846 provides clear, up-to-date visibility into stock levels for both buyers and sellers. Retailers can monitor supplier inventory and adjust their eCommerce listings accordingly. Suppliers gain insight into stock movements to support better demand planning and replenishment strategies.
Reduced Manual Processes and Data Errors
Because EDI 846 transactions can be fully automated, trading partners no longer need to exchange inventory information through email, phone calls, or manual data entry. Automated inventory updates save time, improve communication speed, and ensure data accuracy across connected systems.
Better Warehouse Management and Demand Planning
With accurate, frequent inventory data, retailers can create better strategies for warehouse ordering and store replenishment. Suppliers can identify trends in stock movement, anticipate demand, and optimize their fulfillment operations. EDI 846 data also allows businesses to display scarcity messaging on eCommerce sites — such as “only 5 left!” — to create urgency and drive conversions.
Need Help Automating EDI 846?
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What are Common EDI 846 Challenges?
Inventory Accuracy
The EDI 846 relies on accurate inventory data from the sender. If a company does not maintain a reliable inventory system or stock status is not properly updated, the 846 will communicate incorrect information — leading to overselling, stockouts, or missed sales opportunities.
Transmission Frequency and Timeliness
Retailers often have strict requirements for how frequently suppliers must send EDI 846 documents. Meeting daily or intra-day transmission schedules can be complex and time-consuming without the right EDI automation in place. Delayed or missed transmissions directly impact eCommerce accuracy and customer experience.
How Often Should You Send an EDI 846?
Businesses that handle drop shipping or direct-to-consumer fulfillment for trading partners should send EDI 846 files at least once daily. Many retailers expect to receive inventory updates several times per day, especially for high-volume or fast-moving products. The more frequently the 846 is transmitted, the more accurate the inventory picture remains for all parties involved.
How EDI 846 Connects to Other EDI Documents
The EDI 846 does not operate in isolation. It is part of a broader ecosystem of EDI transaction sets that work together to facilitate supply chain communication.
EDI 997 Functional Acknowledgment
After an EDI 846 is transmitted, the receiving party typically sends back an EDI 997 Functional Acknowledgment. This confirms that the 846 document was properly received and processed, providing a clear audit trail for both trading partners.
EDI 850 Purchase Order and Auto-Replenishment
In some cases, the inventory data contained in an EDI 846 can trigger an EDI 850 Purchase Order. If an automatic replenishment agreement exists between trading partners, low stock levels reported via the 846 may automatically generate a purchase order to restock inventory — reducing lead times and preventing stockouts.
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EDI 846 Format Example
Raw EDI vs. Translated Format
EDI 846 documents are transmitted in a raw, structured format designed for machine-to-machine processing. EDI software translates this raw data into a human-readable format that integrates with business systems.
Simplify EDI 846 with Vantree’s EDI Services
Vantree provides EDI solutions that make transmitting and managing EDI 846 documents faster and more reliable. Since 1994, Vantree has helped over 1,000 businesses automate their EDI processes with dependable support and competitive pricing.
EDI Automation and ERP Integration
Vantree’s EDI Automation integrates directly with leading ERP systems — including SAP, Microsoft Dynamics 365, Oracle, NetSuite, Sage, QuickBooks, Acumatica, and Infor — so inventory data flows seamlessly between your business systems and your trading partners. This eliminates manual data entry, reduces errors, and ensures your EDI 846 transmissions are always timely and accurate.
Vantree’s Web EDI for Inventory Management
Vantree’s Web EDI is a cloud-based solution that allows businesses to send and receive EDI documents — including EDI 846 — through an easy-to-use web interface. With 24/7 transaction visibility, connections to all major EDI networks, and personalized workflows, Web EDI simplifies inventory management for businesses of any size.
