Commercial Utility Bill Review for Illinois Businesses
Last reviewed: 7/30/2026
By Illinois Commercial Energy editorial team · Reviewed by JakenEnergy commercial energy team
A commercial utility bill is the single best starting point for any Illinois energy decision. A bill review reads it deliberately — separating what you're paying for the electricity or gas itself from what you're paying the utility to deliver it — so a renewal or pricing decision rests on the actual account, not a generic rate.
Who this is for
Controllers, accounts-payable teams, and facility managers who want to understand a commercial electric or gas bill before renewing or shopping supply. It is not a residential exercise; it assumes commercial rate classes, demand charges, and supplier contracts.
What a review looks at
Read the bill in four groups:
- Account and meter — service address, rate class, billing days, meter, and current supplier.
- Usage and demand — kWh, billed kW (for electric), therms (for gas), and any related demand fields.
- Supply — energy, capacity, transmission, adjustments, and any supplier fees. This is the part a competitive supplier can price.
- Delivery and other — customer, distribution, metering, riders, taxes, and credits. This stays with the utility under its tariff.
The field-by-field ComEd bill guide shows how to build a consistent 12-month history from these groups.
What the review answers
- Is the supply rate exposed? Where the account sits relative to the utility benchmark and current market, and whether it is on a contract, holdover, or default rate.
- When does the contract end? Timing drives everything; post-expiration and auto-renewal terms are common cost traps (see contract review).
- How much is delivery? Delivery is often a large share of a commercial bill, which caps how much any supply change can move the total.
- Is demand driving cost? For demand-billed accounts, peak kW may be the biggest lever, independent of the supply rate.
Review vs. audit
A review is about pricing and timing; a bill audit is about accuracy — confirming rate class, multipliers, exemptions, and charges against the tariff. Both start from the same bill, and it is reasonable to run them together.
Getting started
Upload one or two recent commercial bills (electric, gas, or both). A full 12-month history and the current supplier contract make the review sharper, but a single recent bill is enough to begin. Utility bills carry confidential account data — share them only through the secure request, not by posting them anywhere public.
Frequently Asked Questions
QWhat is the difference between a bill review and a bill audit?
A bill review focuses on pricing and contract exposure — is the supply rate competitive, when does the contract end, how much of the bill is delivery, and where is demand driving cost. A bill audit focuses on accuracy — verifying rate class, meter multipliers, tax exemptions, and charges against the applicable tariff to find billing errors. They answer different questions and are often done together.
QWhat does a bill review need from me?
One or two recent commercial bills (electric, gas, or both) showing the account number, service address, usage, demand, and the supply and delivery detail. A full 12-month history and the current supplier contract make the review more useful, but a single recent bill is enough to start.
QWill a review tell me how much I will save?
No. A review identifies pricing exposure, contract timing, and where cost is concentrated, and it frames the options. Actual pricing depends on account usage and current market offers, and no savings figure can be promised in advance.
Related guides
Sources
Next scheduled review: 10/30/2026. Time-sensitive rate, tariff, capacity, and incentive details should be confirmed against the linked primary sources and a current bill.