Why utility bills are the least-audited line on a multi-site P&L
Rent, payroll and freight get reviewed line by line. Utility bills get paid on approval. Here is why, and what it costs a 200-site operator.
Meera Kulkarni · October 14, 2026 · 6 min read
Key takeaways
- Utility bills are paid on a variance check against last month, which cannot catch an error that has been there for a year.
- The data needed to audit a bill (tariff, meter, interval data) sits outside AP, so nobody owns the review.
- A first audit across a multi-site portfolio typically finds 3% to 7% of spend overbilled, and the lookback window shrinks every month.
Every other big line has an owner who checks it
Ask a controller how rent is verified and the answer is specific: a lease abstract, an escalation schedule, a CAM reconciliation. Payroll is checked against headcount and rates. Freight is checked against rate cards and delivery confirmations. Each of these lines has a reference document that says what the amount should have been, and someone whose job is to compare the two.
Utility bills have a reference document too. It is the tariff, the published rate schedule on file with the state commission. But nobody in finance holds it, and nobody in facilities reads it. The invoice arrives, the account number matches, the total looks like last month, and the bill is approved for payment.
Approval by variance is not an audit
Most AP teams review utility bills with a variance rule: flag anything more than 10% or 15% above the same month last year or the prior month. That rule is reasonable for catching a burst pipe or a stuck meter. It is almost useless for catching a billing error, because a billing error is usually steady. A site placed on the wrong rate schedule at opening is on that schedule every month. A meter multiplier entered wrong is wrong in the same direction every cycle.
A steady error becomes the baseline. After three bills it is what the system considers normal, and the variance rule is now anchored to the overcharge. The only way to find it is to recompute the bill from the tariff and the meter data, independent of what the last bill said.
The data lives in three places, so nobody sees it whole
To recompute a commercial bill you need the tariff text, the account's rate assignment, the meter configuration including multiplier, and ideally the interval data showing when and how much power was drawn. AP has the invoice image. Facilities has some of the meter history. The utility holds the tariff and the rate assignment. No single role is positioned to put them side by side.
At 30 sites this is an annoyance. At 300 sites with 1,500 accounts across a dozen utilities, it is structurally impossible to do by hand. The review that would catch the error costs more analyst time than most companies will spend on a line item that looks stable, so it does not happen, and that is a rational decision made one account at a time.
What the unreviewed errors add up to
On a first audit of a multi-site portfolio, Trace Global typically finds 3% to 7% of utility spend overbilled, and about 1 in 9 commercial accounts carries at least one recoverable error. For an operator spending $20 million a year on utilities, that is $600,000 to $1.4 million that was billed in error, spread across dozens of small findings that no single reviewer would have seen as worth chasing.
The findings are mostly ordinary. A rate class that no longer fits the load, a demand reading inflated by a single outage restart, sales tax charged on usage that qualifies for an exemption, a closed site still on a standing bill. Each is a few hundred to a few thousand dollars a month. Together they are a line item.
The cost of waiting is measured in months of lookback
Refund rights are bounded by how far back a utility or commission will go to correct a bill, and that window varies by state and by tariff. Where the window is 24 months, an error that started two years ago loses a month of recoverable money every month it goes unreviewed. The overcharge is not just recurring, it is also expiring.
That is the argument for auditing as a program rather than a project. A one-time review recovers what is inside the window today. Continuous review catches new errors in their first or second bill, when the window is still fully open and the evidence is fresh. Either is better than the status quo, where the first person to read the tariff is the one who inherits the dispute.