EDI 850 Purchase Order Builder

What an 850 Purchase Order Is

The X12 850 is the electronic purchase order — the buyer's instruction to a vendor to ship a set of items under agreed terms. Retailers, distributors, manufacturers, and procurement teams send 850s to their suppliers as the opening move in the EDI procurement loop: the supplier responds with an 855 (PO acknowledgment), ships and sends an 856 (advance ship notice), invoices with an 810, and gets paid via 820. A valid 850 carries the PO number and date, the purpose and type codes (BEG segment), requested ship date, FOB / freight terms, buyer and vendor identification, optional ship-to and bill-to addresses, line items with quantity, unit, and unit price, any allowances or charges, and a line-count trailer — all wrapped in the standard ISA/GS/ST envelope.

Who This Tool Is For

Large buyers run EDI through a VAN or their ERP's built-in translator. Anyone without that infrastructure — a small retailer placing orders with a manufacturer, a procurement team testing a new vendor's integration, a supplier reverse-engineering a buyer's implementation guide, or a developer building against a sample 850 — can use this tool to produce a valid file in a few seconds. Save the vendor's trading-partner profile once and every future PO is a short form and a download. Import from QuickBooks Desktop IIF (PURCHORD records) to skip retyping existing POs.

How This Tool Generates a Valid 850

The tool composes a standard ANSI X12 4010 envelope: a fixed-length 106-character ISA, a GS functional group header with PO (purchase order) identifier, and an ST*850 transaction set containing a BEG header (purpose, type, PO number, date), optional CUR (currency), REF segments for vendor reference and department, an optional FOB segment, a DTM*002 for requested ship date, N1/N3/N4 loops for buyer, vendor, ship-to, and bill-to, PO1 segments for each line with a PID description, optional SAC segments for freight and allowances, and a CTT line count. Control numbers auto-generate from the current timestamp; override them if your trading partner requires sequential numbering. The generated file parses cleanly through the EDI File Parser, useful for verifying the output before submission. For segment-level reference, see the X12 Segment Reference. The companion EDI 810 Invoice Builder shares the same trading-partner store.

What This Tool Isn't

This is a lightweight, draft-builder tool. It produces a syntactically valid 850 that most trading partners will accept with minor tweaks, but it doesn't handle partner-specific implementation guides (Target / Walmart / Amazon qualifier codes, 5010 variants, per-partner SAC code preferences, blanket-release nesting, or drop-ship-specific segments). It also doesn't handle transmission — you still need a way to deliver the file (AS2, SFTP, VAN, email). If your vendor rejects a PO for a spec reason, Ask James — I can adjust the output to match their guide.

EDI Integration with Your Systems

Most of the EDI integration work I do bridges X12 and whatever formats your systems produce and consume — modern APIs, database tables, spreadsheet exports, flat files, or legacy platform-native formats. Inbound direction: a partner's 850/856/997 lands in the exact shape your order entry, WMS, or AP system expects. Outbound direction: validator-clean 810/850/855/856/820 built from your systems' native data — handling partner-specific variations, acknowledgments, and exception workflows.

Need the Full PO Loop (855/860/865/856/810)?

A standalone 850 is the easy part. The real work is the loop around it: 855 acknowledgments that tell you whether the vendor accepted, changed, or rejected each line; 860 change orders when quantities or ship dates shift after the fact; 865 change acknowledgments closing that loop; 856 ASNs with SSCC-18 license plates tied back to the originating PO; 810 invoices that match against the PO for three-way match; and 820 payment remittance that closes the cycle. I build these integrations to your trading partner's exact spec, validator-tested, with the glue to your ERP or receiving system so the whole loop runs without manual intervention. For help with full EDI onboarding, automating the 850/855/860/856/810 loop between your system and a new vendor, or tying POs to receiving for three-way match, Ask James.