Commercial Utility Bill Review for Illinois Businesses

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:

1. Account and meter — service address, rate class, billing days, meter, and current supplier.
2. Usage and demand — kWh, billed kW (for electric), therms (for gas), and any related demand fields.
3. Supply — energy, capacity, transmission, adjustments, and any supplier fees. This is the part a competitive supplier can price.
4. 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.

Reading in groups matters because a commercial bill mixes charges that behave in completely different ways. Supply responds to the market and to a supplier contract; delivery follows a regulated tariff and moves only when the utility's rates change; demand responds to how the facility operates. Collapsing them into one "cents per kWh" number hides which lever actually controls the bill — and that lever is different from account to account.

Where the cost actually sits

Before asking whether a supply rate is competitive, it helps to see how the total divides. On many commercial accounts, delivery and demand together make up a substantial share of the bill, which means a change to the supply rate moves only the portion it touches. A review makes that split explicit so expectations are grounded. Two accounts with identical usage can have very different cost structures — one dominated by a demand peak, another by supply exposure on an expired contract — and the right next step differs accordingly.

That is also why a headline "rate" quoted in isolation can mislead. A supplier's per-kWh figure applies only to the supply column; applying it against the whole bill overstates any difference. The review's job is to keep the comparison honest by putting supply against supply and naming what delivery and demand contribute on their own.

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.

What to gather, and what to ask

A sharper review starts with a little more than a single statement. Useful inputs:

• A full twelve months of bills for each account, so seasonality and demand patterns are visible rather than inferred.
• The current supplier contract (and any amendments), so the review can check the bill against the terms and locate the end date and notice window.
• Interval data for demand-billed or larger accounts, which shows when usage and peaks occur — detail a monthly summary can't provide (see the interval-data guide).
• The account/meter inventory for anything with more than one meter or site.

Good questions to carry out of a review: What share of my bill is delivery versus supply? When exactly does my contract end, and what is the notice deadline? Is demand the dominant driver here, and is it addressable? Am I on the rate class that fits my usage? Those answers frame the next decision without committing to one.

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: the audit confirms the bill is correct, the review assesses whether the pricing and timing are competitive. A number that is accurate can still be uncompetitive, and a competitive rate can still be billed incorrectly — which is why the two questions are worth asking side by side.

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. A review does not promise a savings figure; it produces a clear read of where the account stands so the next step — a contract review, a demand-charge look, or a pricing request — rests on the actual bill.