Insight
How to verify contractor invoices against the work actually done
To verify a contractor invoice against the work actually done, match every invoice line to a work order and an approved scope item, then to dated, located before and after photos of that exact spot. Approve the lines that carry that evidence, hold the ones that do not, and keep the whole record with the building so the next invoice is easier to check.
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Why invoices are hard to check across many buildings
An owner with one building can walk the roof after a repair. An owner with forty sites usually approves invoices from a desk, days or weeks after the crew has left, against a line that reads "repair roof leaks, labor and material" and nothing to compare it to. The Department of Energy's Federal Energy Management Program puts the question plainly in its O&M Best Practices Guide: when assessing how maintenance is tracked, ask how you verify that the work was done efficiently and correctly, and whether you can see the last time a system was serviced, by whom and in what condition. If the answer is an inbox and a shared drive, invoice review runs on trust rather than evidence.
What every invoice line should trace back to
Federal construction contracts are a useful model because they spell out what a payment request must carry. FAR 52.232-5 asks for an itemization of the amounts requested, related to the various elements of work, plus supporting data in the form and detail the contracting officer requires. Owners can ask for the same discipline in plain terms.
- A work order or service request, with the reported problem and the building, floor or roof section
- The approved scope item or change order the line is billing against
- Quantities that can be checked, such as square feet of membrane, units serviced or parts replaced
- Before photos of the condition, taken at the spot named in the work order
- After photos from the same spot and angle, with capture date, time and location kept
- Model and serial numbers for any equipment or major part that was replaced
What makes a photo count as evidence
A photo proves little on its own. A close-up of a clean seam could come from any roof on any day. Photos become evidence when they carry their capture date, time and location, when the before and after shots frame the same spot so a reviewer can see what changed, and when a wide shot shows where on the building the close-up was taken. Ask contractors to photograph nameplates when equipment is serviced or replaced, and to include a tape measure or other reference in the frame when a quantity is being billed. Photos forwarded later by email or text often lose their time and location data, so the record is stronger when photos are captured into the work order in the field rather than attached afterward.
A review routine that scales
The goal is not to inspect every line in person. It is to make every line checkable, then spend site visits where the evidence is thin.
- Approve lines whose quantity, location and before and after photos agree with the work order and scope
- Hold lines that bill for work outside the approved scope until a change order is approved
- Query lines whose photos are missing, undated or taken somewhere other than the location in the work order
- Check repeat repairs at the same location against earlier work orders before paying for the same fix twice
- Sample a few approved jobs each quarter for a site check, and record what you find
Inspection records belong with the work, not in the inbox
The federal inspection clause for construction contracts, FAR 52.246-12, requires the contractor to maintain complete inspection records and make them available, and it says government inspection does not relieve the contractor of responsibility for its own quality control. The same split works for private owners: contractors document their own work, owners review it, and the record stays with the building. The DOE guide lists the same idea among core maintenance management functions, with work orders tracked by equipment and a history that can be sorted by equipment, date and the person who responded. With that history, an owner can see that a rooftop unit has been repaired four times in a year and decide whether it belongs in the capital plan instead.
How GC 360 handles proposals, change orders and the client portal (opens in new tab)
How Pulsix AI ties the invoice to the evidence
Pulsix AI is one system for your buildings, your work, your money and your risk. Contractors work inside it, so a work order moves from request to verified close with its change orders, and each invoice carries the photos and findings behind it. An owner reviewing an invoice sees the work order, the scope and the located photos in one place, and can approve, hold or question a line without chasing attachments. Seeing the financial impact of each work order and invoice in budget vs actual is in pilot with owners now. Your books stay in the accounting system you already run, and payment is still made there.
Questions
- How do I verify contractor invoices against the work actually done, with photos?
- Match each invoice line to a work order and an approved scope item, then to dated, located before and after photos of the same spot. Approve lines with that evidence, hold lines outside the approved scope, and query lines with missing or undated photos.
- What should a contractor include with a building repair invoice?
- An itemized list of amounts tied to specific elements of work, the work order or change order each line bills against, checkable quantities, before and after photos with capture date and location, and model and serial numbers for replaced equipment.
- Do I need to visit every site to check invoices?
- No. When every line carries its work order, scope and located photos, most lines can be reviewed remotely. Save site visits for lines with thin evidence and for a small quarterly sample of approved jobs.