What is three-way matching?
Three-way matching is an accounts-payable control that compares three documents — the purchase order, the goods receipt note (GRN), and the supplier invoice — before a payment is approved. The invoice is paid only if quantities and prices agree across all three.
Three-way matching answers a simple but critical question before any money leaves the building: *did we get what we ordered, and is the bill correct?* It does this by cross-checking three documents — the purchase order (what we ordered), the goods receipt note (what we received), and the supplier invoice (what we are billed) — and only releasing payment when all three agree.
The three documents matched
- Purchase order (PO) — the agreed items, quantities, and prices.
- Goods receipt note (GRN) — proof of what was actually delivered and accepted.
- Supplier invoice — the amount the vendor is charging.
If the PO says 100 units at ₹500, the GRN confirms 100 received, and the invoice bills 100 at ₹500 — it matches and pays. If the invoice bills 110 units or ₹540 each, the mismatch is flagged for review before any payment.
Three-way matching example
A PO orders 200 cartons at ₹140 = ₹28,000 + 18% GST. The warehouse receives and books a GRN for only 185 cartons (15 damaged). The supplier invoices for all 200. Three-way matching catches the 15-carton gap, so finance pays for 185 (₹25,900 + GST) and raises a debit note for the shortfall — saving the cost of goods never received.
Tolerances keep it practical
Most teams allow a small tolerance (e.g. ±2% on price or quantity) so trivial roundings auto-pass, while anything larger is held for a human to review. This is where automation pays off.
Why three-way matching matters
- Prevents overpayment — you only pay for what was ordered and received.
- Catches fraud and errors — duplicate, inflated, or phantom invoices get flagged.
- Audit and compliance — a clean, evidenced trail supports statutory audit and GST input claims.
- Vendor accountability — short or damaged deliveries surface before payment, not after.
Three-way matching is the financial control at the tail end of the procure-to-pay cycle — the gate between receiving goods and releasing cash. Some organisations add a fourth check (the inspection report) for a four-way match on quality-critical items.
Frequently asked questions
What are the three documents in three-way matching?
The purchase order (what was ordered), the goods receipt note or GRN (what was received), and the supplier invoice (what is being billed). Payment is released only when quantities and prices agree across all three.
What is the difference between two-way and three-way matching?
Two-way matching compares only the purchase order and the invoice. Three-way matching adds the goods receipt note, so you also verify that the goods were actually received before paying — a stronger control.
What happens when a three-way match fails?
The invoice is held as an exception and routed for review. The buyer investigates the discrepancy — short delivery, price difference, or wrong quantity — and resolves it with a corrected invoice, debit note, or approved override before payment.