Stored materials: the hardest line item to verify

Most line items on a G703 are straightforward in principle: work was performed, a percentage complete is claimed, that percentage times the scheduled value equals the amount due. Stored materials break this model. The materials haven't been installed. They may not even be on site. But the contractor has incurred costs procuring them, and the contract typically allows billing for stored materials - sometimes up to the full value of the materials, sometimes at a reduced rate, sometimes only once they're on the project site and tagged.

The documentation gap

A line item billed with stored materials requires documentation that a pure progress-billing line doesn't: bills of lading, delivery receipts, photos of tagged inventory, sometimes even a bill of sale transferring title to the owner. Most pay applications arrive with none of this attached. The number is on the G703. The backup is in a folder on the PM's desktop, or in an email thread from two months ago, or it doesn't exist. The reviewer either trusts the number or spends an hour chasing documentation that should have been in the package.

Stored materials are where the honor system in construction billing meets its real test: can the contractor prove they own what they're billing for?

The cumulative overbilling risk

The danger with stored materials isn't fraud - it's drift. A contractor is approved for $80,000 in stored HVAC equipment in application #5. In application #6 the equipment is still in the warehouse. In application #7 it arrives on site but hasn't been installed. If nobody is tracking the cumulative stored-materials balance against actual installation progress, a project can quietly pay for materials twice: once as stored, once as installed, with zero line items exceeding their scheduled value. The error is invisible at the line level and devastating at the project level.