A plumber sends you an invoice for $1,400. You were not on-site. You do not know what the going rate for that repair is in Dallas. The vendor says the work is done. You pay it because you do not have the context to push back. This cycle repeats across every trade, every month, across every property you operate without facilities oversight.
You are not being overcharged because you are naive. You are being overcharged because no one on your side has the context to verify what was done, whether the scope was appropriate, or whether the pricing aligns with the DFW market. Here is how to start closing that gap.
Start with the scope of work
The single most important document in vendor management is the written scope of work, agreed upon before the vendor starts. If your vendors are performing work without a written scope, that is the first thing to fix. No scope means no basis for evaluating whether the invoice reflects what was authorized.
A scope should include: what specific work will be performed, what materials will be used, how many labor hours are estimated, what the total cost will be (or the not-to-exceed amount), and what is explicitly excluded. If the vendor cannot articulate the scope in writing before starting, that tells you something about how they operate.
Red flags on invoices
Not every questionable invoice is fraud. Most of the time, it is scope creep that no one authorized, or pricing that assumes you will not check. Look for these patterns:
- 1.Lump-sum line items with no breakdown. "Plumbing repair: $1,400" tells you nothing. A legitimate invoice breaks down labor hours, hourly rate, materials with quantities, and any trip charges.
- 2.Material quantities that do not match the job. A single toilet repair should not include 20 feet of supply line. If material quantities seem high relative to the repair described, ask for clarification.
- 3.Labor hours that exceed the scope. A 2-hour job that invoices for 4 hours needs explanation. If the vendor encountered complications, they should have communicated that before billing for the additional time.
- 4.Recurring "emergency" surcharges. Emergency rates are legitimate for after-hours calls. If every invoice has an emergency premium, your vendor is either classifying routine work as urgent or you need to address the root cause driving the emergencies.
- 5.Work performed beyond the original scope without authorization. "While we were there, we also replaced..." is scope creep. Additional work requires separate authorization, even if the vendor believes it was necessary.
What you can verify without trade expertise
You do not need to be a plumber to verify a plumbing invoice. Check three things: Does the invoice match the authorized scope? Are the quantities and hours proportional to the described work? Is the total consistent with prior invoices for similar work at this property or at your other locations?
Keep a simple log of vendor invoices by trade and property. Over 3-6 months, patterns emerge. You will see which vendors consistently bill at the high end, which ones have clean documentation, and which ones generate scope creep.
When to bring in independent verification
If your annual vendor spend exceeds $30,000-$50,000 across your DFW properties and you do not have a facilities professional reviewing those invoices, you are almost certainly overpaying. The cost of independent verification is a fraction of the savings it produces. A facilities coordinator adds a verification layer: confirming work was completed, validating scope against the invoice, and documenting what was done for your records.
This is not about distrusting your vendors. Most vendors do good work. But without independent verification, the incentive structure favors the vendor. Adding oversight realigns that incentive without damaging the relationship.