Illinois Competitive Energy Bidding for Commercial Accounts
By Illinois Commercial Energy editorial team
Reviewed by JakenEnergy commercial energy team
Illinois Competitive Energy Bidding for Commercial Accounts
A competitive bidding process is the most reliable way for an Illinois commercial account to get supply pricing it can trust. Instead of negotiating with a single supplier who has no reason to sharpen its offer, you invite several licensed suppliers to quote the same load under the same terms at the same time. The competition disciplines the pricing, and the shared specifications make the offers genuinely comparable. This article explains how the process works, what belongs in the request you send out, and how to evaluate the responses fairly.
How Competitive Bidding Works
At its core, competitive bidding means soliciting multiple Alternative Retail Electric Suppliers (ARES), each licensed by the Illinois Commerce Commission, to price your business's energy on identical terms. Each supplier knows it is quoting against competitors for a defined piece of business, which gives each an incentive to put forward its best available number rather than leaving room it would keep in a one-on-one negotiation.
The process applies equally in both Illinois markets. Accounts in ComEd territory in the north price into the PJM Interconnection market, and accounts in Ameren Illinois territory in the center and south price into MISO. The bidding mechanics are the same in each, though the two markets are quoted separately because they are distinct. Importantly, none of this alters your delivery service. Whichever supplier wins, the utility still owns the wires and meter, responds to outages, and bills delivery charges. Competitive bidding is only about the supply portion of your bill. Our overview of commercial energy procurement places bidding within the wider buying process.
Building the RFP
The quality of the offers you receive depends almost entirely on the quality of the request you send. A vague request produces vague, non-comparable indications; a precise request produces firm, comparable offers. A well-built commercial energy RFP includes the following.
Accounts and Usage Data
List every account to be priced with its utility, rate class, and meter identifier, and attach the usage history, at least twelve months of billing data and, where the meters support it, interval (hourly) data. Suppliers price your specific load shape, so this is the foundation of an accurate quote. The worked example shows how gathering this data early feeds the rest of the process.
Term and Rate Structure
State the term length or lengths you want priced, and the rate structure you are seeking, fully fixed, partially fixed, or index-linked. If you are undecided, you can ask suppliers to quote more than one option, but keep each option clearly separated so responses stay comparable. Our comparison of fixed vs index commercial electricity helps you decide what to request.
Usage Bandwidth and Component Treatment
Specify the usage bandwidth the contract must accommodate, so suppliers price against a realistic range rather than assuming a flat load. Say how you want each cost component handled, which should be fixed into the rate and which may be passed through. Defining this in the request means the offers come back already aligned on scope, saving you from reconstructing it afterward.
Response Deadline and Validity
Ask all suppliers to return offers by the same deadline, ideally on a single coordinated pricing day, with validity windows that overlap. Because wholesale forward prices move continuously, quotes gathered on different days are struck under different market conditions and cannot be compared cleanly. A coordinated deadline removes that distortion and is one of the most valuable things a well-run RFP does.
Evaluating Responses Fairly
When offers arrive, the goal is an objective comparison, not a reaction to whichever quote is presented most attractively. Fair evaluation has two parts: normalize first, then judge.
Normalize Before Comparing
Suppliers structure quotes differently even when responding to the same request. Before comparing prices, restate every offer on the same term, the same included components, the same usage bandwidth, and the same pass-through treatment, and account for any fees. Only after this normalization do the numbers describe the same product. Our guide on how to compare offers apples to apples details each dimension to align. Skipping normalization is the single most common way a fair-looking process reaches an unfair conclusion.
Judge on Pre-Defined Criteria
Decide before offers arrive what matters beyond price: the term that fits your plans, the flexibility of the usage band, the specific contract terms, and each supplier's standing. Evaluating against criteria you set in advance keeps the decision honest, because you are not tempted to rationalize a choice around whichever quote happens to look best on the surface. The guide to evaluating an Illinois ARES provider covers what to verify about a supplier itself.
Account for How Intermediaries Are Paid
If a broker or consultant runs the bid or advises on it, confirm how that party is compensated, whether through a flat fee or a margin embedded in the winning rate, because that compensation is part of the total price. Our article on ESCO vs broker vs consultant explains the roles and typical compensation models, so you know what to ask for in writing.
Common Pitfalls
A few mistakes recur often enough to name. Gathering quotes over several weeks and comparing them as if they were contemporaneous invites the market's movement to masquerade as a supplier difference. Sending a loosely specified request and then trying to normalize wildly different responses wastes effort that a precise RFP would have saved. And letting an offer's validity window expire because internal approval was not arranged in advance can forfeit an acceptable price. Each of these is avoidable with preparation, and each is worth guarding against deliberately.
Why the Process Is Worth It
Competitive bidding takes more upfront work than accepting a single supplier's number, but the work buys you two things a solo negotiation cannot: real competitive pressure on the price, and a set of offers you can compare with confidence. Combined with disciplined, criteria-based evaluation, that produces a supply decision you can defend to anyone in your organization, grounded in a fair process rather than in a persuasive pitch. For northern Illinois accounts specifically, our ComEd overview explains how the resulting supply rate appears alongside delivery charges on the bill.
Sources
This article is educational and does not promise any specific savings, rate, or outcome for your business.
Frequently Asked Questions
QWhat is a competitive energy bidding process?
It is a process that solicits multiple licensed suppliers to quote on the same commercial load under comparable terms at the same time. By putting suppliers in competition against one another for a defined, well-documented request, a business gets offers it can compare fairly, rather than negotiating with one supplier in isolation without a benchmark for what the market will bear.
QWhat should go in a commercial energy RFP?
Include the accounts and their usage history, the term or terms to be priced, the rate structure sought, the required usage bandwidth, how each cost component should be handled, and the response deadline. The more precisely the request is specified, the more comparable the responses will be, because every supplier is pricing the same thing on the same basis.
QWhy should suppliers quote on the same day?
Wholesale forward prices move continuously, so quotes gathered on different days reflect different market conditions. If suppliers respond on a coordinated day within overlapping validity windows, the differences between their offers reflect the offers themselves rather than the market having shifted between quotes. Same-day pricing is what makes a competitive comparison meaningful.
QDoes competitive bidding change my utility service?
No. Bidding only concerns the supply portion of your bill. Your delivery utility, ComEd or Ameren Illinois, continues to own the wires and meter, handle outages, and bill delivery charges no matter which supplier wins. A competitive supplier, licensed by the Illinois Commerce Commission, affects only the supply price, not the reliability or delivery of your service.
QHow do I evaluate responses fairly?
First normalize every offer to the same term, included components, bandwidth, and pass-through treatment, and account for any fees. Only then compare prices. Weigh the normalized numbers alongside contract flexibility and each supplier's terms and standing. Evaluating on identical criteria, defined before offers arrive, keeps the decision objective and defensible rather than driven by whichever quote is framed most attractively.