How to Audit Your Commercial Property's Energy Bills for Hidden TDSP Fees

If you own or manage commercial property in Texas, you already negotiate the supply rate — the cents-per-kWh number a broker quotes you. But on a multi-tenant building, that's only half the bill. The other half — delivery, billed through your TDSP (Transmission and Distribution Service Provider) — is where money quietly leaks, year after year, because almost nobody audits it.

Here's how to find it.

Supply vs. delivery: the two halves of every Texas bill

Every commercial electricity bill in deregulated Texas has two sides:

• Supply — the energy itself, from your Retail Electric Provider (REP). This is the rate you shop and negotiate.
• Delivery (TDSP) — the regulated cost of moving that energy across the poles and wires, billed by your utility (Oncor, CenterPoint, AEP, TNMP and others) and approved by the PUCT.

You can't negotiate TDSP rates — they're regulated. But you can absolutely be billed the wrong ones, and on a building with multiple meters those errors compound. Auditing delivery isn't about haggling; it's about catching mistakes.

Where TDSP money actually leaks

1. The wrong rate class

Every meter is assigned a tariff class based on its size and usage profile. A meter that's grown — or shrunk — can sit on the wrong class for years, paying demand-based charges it shouldn't, or missing a cheaper bracket it qualifies for.

2. Demand charges vs. load factor

For larger meters, a big chunk of delivery cost is the demand charge — billed on your single highest 15-minute spike (kW), not your total usage (kWh). A building with a low load factor (short, sharp peaks from HVAC or elevators) pays disproportionately. If nobody's watching the peak, nobody's managing the charge.

3. House and common-area accounts on default pricing

The tenant meters get attention at lease time. The house account and common-area meters — lobby, parking, elevators, landlord-supplied loads — often sit on default or holdover pricing no one ever shopped or checked.

4. Metering multiplier errors

Larger services use current transformers with a multiplier applied to the meter reading. A wrong multiplier silently inflates (or deflates) every charge on that meter until someone reconciles it against actual consumption.

5. Unbundled riders no one reads

Delivery bills carry a stack of riders and pass-throughs. Most are legitimate. A few are misapplied — and they only get found when somebody reads the line items against the published tariff.

A six-step self-audit you can run this week

1. Pull 12 months of bills for every meter in the building or portfolio.
2. Separate supply from delivery on each — they're negotiated and corrected differently.
3. Confirm the rate class of each meter against the published TDSP tariff for its size.
4. Check demand charges against load factor — high demand with low usage is your red flag.
5. Flag anything you can't explain — multipliers, riders, "other" line items.
6. Look back 24 months for recoverable errors; billing mistakes can often be corrected retroactively.

Working through a portfolio? Our free Commercial Energy Cost Reduction Checklist walks the same process meter by meter.

What's actually recoverable — and how

When an audit turns up a genuine TDSP billing error — wrong class, bad multiplier, a misapplied rider — it's corrected through the utility, and overcharges are typically refunded or credited, often back across the period the error ran. The recoverable amount depends on the error and how long it persisted, but on multi-meter properties it's frequently four or five figures that nobody knew was leaving the building.

None of this requires installing anything. There's no solar, no batteries, no capex — just a careful read of bills you're already paying.

When to hand it to a specialist

A self-audit will catch the obvious problems. The subtle ones — multiplier reconciliation, rate-class optimization across a mixed portfolio, demand-charge strategy — are where a specialist earns their keep. That's exactly what UPG's free Energy Health Check does: we audit your TDSP charges line by line across every meter, flag what's recoverable, and hand you a written summary before you commit to anything.

Own or manage commercial property? Send one recent bill per building and we'll show you where it stands. See how we work with commercial real estate owners and managers, or start your free Energy Health Check.