Subcontractor billing control is the process of verifying that invoices from construction subcontractors match the signed contract, the agreed unit prices, and the work actually completed on site. In construction, where a single project relies on many subcontractors billing in stages, this control is a critical defense against overbilling.
The difficulty is structural. Subcontractor invoices arrive against progress statements, not simple purchase orders. Prices follow a contract schedule, quantities depend on site validation, and revisions stack up over months. Checking each invoice line against the right contract clause and the certified progress, by hand, is slow and easy to get wrong, which is exactly how overpayments slip through.
This pain point is acute in the construction segment (BTP), where margins are thin and a few uncontrolled lines per project add up fast.
Phacet automates the control. The agent that verifies invoices against contract terms checks each subcontractor line against the agreed rates and clauses, while the supplier billing control agent flags wrong prices and overcharges before payment. For staged deliveries, three-way matching ties invoice, order, and validated work together. Every decision is traceable through a native audit trail.
The result: subcontractor invoices are validated before payment, not audited after, and margin on each project is protected line by line.
