Accounts payable is the highest-volume, most rules-driven process in the procure-to-pay chain, and it is usually the first place a mid-market finance team runs out of capacity. Invoices arrive through half a dozen channels, most of them match cleanly, and a stubborn minority do not — a price that moved, a partial delivery, a missing goods receipt, an invoice with no purchase order at all. Those exceptions are what actually consume the function.

Outsourcing the process means handing over the whole loop rather than just the data entry: intake and capture across every channel, two- and three-way matching against PO and goods receipt, exception triage and supplier chasing, approval routing, payment-run preparation, and supplier statement reconciliation.

Because the process is documented before it transfers, you also end up with something most finance teams do not have today: a written procedure, a measured baseline taken before we start, and monthly reporting on cycle time, exception rate and first-pass match rate against it.