Transaction set guide

EDI 810 Invoice

The 810 is how suppliers bill retailers electronically. Get it wrong and you don't get paid until you fix it — that's typically a 7-to-30-day delay on top of standard net terms.

Required segment overview

Segment	Purpose	Required?
BIG	Beginning of invoice — invoice number, date, PO number	Yes
REF	References (vendor #, BOL, ASN ID)	Often
N1 / N3 / N4	Remit-to address (where to mail the check)	Often required (N1*RI)
ITD	Terms of sale (net 30, 2/10 net 30)	Often
DTM	Invoice date, due date	Often
IT1	Line item	Yes (one per line)
PID	Item description	Often
TDS	Total monetary value due	Yes
SAC	Service / allowances / charges (freight, fuel surcharge)	Optional
CTT	Total line item count	Yes

BIG segment — invoice header

BIG*20250506*INV789*20250504*PO12345~

• BIG01 — invoice date, YYYYMMDD.
• BIG02 — your invoice number. Must be unique per supplier; some retailers reject duplicates indefinitely.
• BIG03 — date of the original PO (BEG05 from the 850).
• BIG04 — PO number — must match the 850's BEG03 character-for-character.

IT1 segment — line items

IT1*1*5*EA*12.50**VC*ABC123~

Mirrors the PO1 from the 850 — line number, quantity, UOM, unit price, qualifier, vendor part. The retailer cross-references each IT1 to the matching PO1 and rejects if quantities or prices don't match what was on the PO (within tolerance).

TDS segment — total amount due

TDS*6250~

Amount in cents (no decimal). $62.50 = TDS*6250. This must equal the sum of (IT1 quantity × IT1 unit price) plus any SAC charges minus allowances.

The five most common 810 rejections

1. PO number mismatch. BIG04 doesn't match the 850's BEG03 exactly (case, leading zeros, dashes).
2. Duplicate invoice number. The retailer's AP system rejects the second submission of the same BIG02 — even if the first was wrong.
3. Quantity mismatch with 856. Retailer compares IT1 quantity to what was actually received per the 856 / dock receipt. If the 810 invoices for more than was received, it rejects.
4. Price mismatch with 850. IT1 unit price doesn't equal PO1 unit price (within retailer tolerance, often 0%).
5. TDS calculation wrong. Doesn't equal sum of line totals + SAC. Retailer's AP system flags it.

Pre-flight checklist before sending an 810

• BIG04 PO number matches the 850 exactly.
• Each IT1 line corresponds to a PO1 from the 850.
• IT1 quantity ≤ 856 SN1 quantity for that line.
• IT1 unit price = PO1 unit price.
• TDS = sum(IT1 qty × IT1 price) + SAC charges − SAC allowances.
• Invoice number BIG02 is unique across your invoice history with this retailer.
• REF*VR vendor number matches the partner profile.

Validating an 810 in EDI-X12

1. Paste the 810 into the validator.
2. Click Validate for structural checks.
3. If a rejection email exists, paste the 810 + rejection text into the AI explainer with task "Explain rejection."

Related

• 850 PO — the document you're invoicing against
• 856 ASN — what was actually shipped
• 997 — confirms structural acceptance, not payment