Commercial Energy Procurement in Illinois: A Worked Example

Buying energy for a commercial account can seem opaque until you see the whole process laid out in order. This article walks through a procurement from beginning to end using a hypothetical, illustrative business so the sequence is concrete. There are no real prices, savings figures, or client names here, and none are implied. The point is to show the shape of a sound process, the questions asked at each stage, and how the pieces connect, so you can run the same steps for your own accounts.

Our example business is a mid-sized operation in Illinois with a handful of metered locations. Some sit in ComEd territory in the north, and one sits in Ameren Illinois territory further south. That split matters, because northern accounts price into the PJM Interconnection market and the southern account prices into MISO. The process below is the same for both, but the two markets are quoted separately.

Step One: Gather Usage Data

Everything starts with knowing how much energy the business uses and when. The team pulls at least twelve months of billing history for each account, and for the meters that support it, they request interval data showing consumption hour by hour. Interval data reveals the load shape, whether usage is flat around the clock or spikes during certain hours, which is exactly what a supplier needs to price accurately.

At this stage the team also confirms basic account facts: the utility and rate class for each location, the meter numbers, and the current contract end dates. Accounts rolling off contract at different times may be grouped or handled separately. If any location is on the utility's default supply rather than a competitive contract, that is noted too. Clean data collected up front is what turns later quotes from vague estimates into firm, comparable numbers.

Step Two: Define Needs and Constraints

Before asking anyone for a price, the business decides what it actually wants. This is where preferences and constraints get written down so the request that goes out is precise.

Key questions include: How long a term makes sense given the business's plans and its view of the market? Does the business prefer the budget certainty of a fixed rate, or is it willing to accept an index or blended structure and the variability that comes with it? Our comparison of fixed vs index commercial electricity is the reference the team uses here. How much might usage grow or shrink over the term, and therefore what usage bandwidth does the contract need to accommodate? Who inside the organization has authority to approve a contract, and up to what threshold?

Answering these before quotes arrive means the business can act decisively later. Because wholesale forward prices move continuously, offers carry short validity windows, so a business that has not settled its own preferences risks watching an acceptable price expire while it deliberates.

Step Three: Prepare the Request

With data and needs in hand, the team assembles a request that goes to multiple competitive suppliers. A well-built request specifies the exact accounts and their usage, the term or terms to be priced, the rate structure sought, the required usage bandwidth, and how the business wants various cost components handled. The clearer the request, the more comparable the responses. Our overview of commercial energy procurement describes how a structured request underpins the whole exercise, and the competitive bidding guide goes deeper on the request itself.

A crucial detail is asking every supplier to quote on the same specifications and, ideally, to return offers on the same day. Because the market moves, quotes gathered on different days reflect different market conditions and are not truly comparable. Coordinating the timing removes that distortion.

Step Four: Solicit Offers Through a Competitive Process

The request goes to several licensed ARES suppliers at once. This is the competitive part of the process, and it is what disciplines pricing. When multiple suppliers know they are quoting the same load against the same terms alongside competitors, each has an incentive to sharpen its offer. Whether the business runs this itself or works with a broker or consultant, the mechanic is the same: comparable terms, multiple bidders, one coordinated timeframe.

On the pricing day, offers come back. Each names a rate, a term, the components included, the usage band, and a validity window that may be as short as a few hours. This is where the earlier preparation pays off, because the business now has to move quickly.

Step Five: Normalize the Offers

Raw offers are rarely directly comparable, because suppliers structure them differently. One offer might fold a cost into the rate that another lists as a pass-through. One might quote a slightly different term or a different usage band. Before comparing numbers, the team restates every offer on the same basis, matching term, matching scope of included components, matching bandwidth, and accounting for any fees consistently.

Only after this normalization do the numbers mean the same thing. Our guide on how to compare offers apples to apples and the broader resource on how to compare commercial energy proposals lay out exactly which line items to align. Skipping normalization is the most common way a business talks itself into the wrong offer.

Step Six: Decide

With normalized offers side by side, the decision becomes tractable. The lowest normalized number is meaningful now that it reflects the same terms as its peers, but it is not the only factor. The business also weighs the term against its plans, the flexibility of the usage band, and the specific terms and reputation of each supplier. Because the person with approval authority was identified in step two, the decision can be made and communicated inside the offer's validity window rather than lost to internal delay.

If the business also uses a broker or consultant, this is where it confirms how that party is compensated, whether through a flat fee or a margin embedded in the rate, because that compensation is part of the total price. Our article on ESCO vs broker vs consultant clarifies those roles.

Step Seven: Contract and Confirm

Once the business selects an offer, it executes the supplier's contract. The team reads the full terms, not just the rate: the exact term dates, the usage bandwidth and what happens outside it, how pass-through components are handled, the renewal and termination provisions, and any fees. After signing, the business confirms the enrollment took effect and watches the first bill to verify the supply rate and terms match what was agreed. The delivery utility continues to bill delivery charges and handle service exactly as before; only the supply portion reflects the new contract.

What the Example Shows

Laid out this way, procurement is less a negotiation and more a disciplined sequence: gather data, define needs, request quotes on identical terms, solicit competing offers, normalize them, decide within the window, and contract carefully. Each step feeds the next, and the preparation done early is what makes the fast-moving pricing stage manageable. Run in this order, the process gives a business genuine comparability and a defensible decision, without relying on any single supplier's framing of what a good deal looks like.

Sources

• Illinois Commerce Commission
• Plug In Illinois
• Illinois Power Agency
• PJM Interconnection

This article is educational and does not promise any specific savings, rate, or outcome for your business.