Ameren Illinois Commercial Energy Rates

Published: February 14, 2019

Ameren Corporation is the parent company of Ameren Illinois, based in Collinsville, Ill., and Ameren Missouri in St. Louis. It is a publicly traded (NYSE:AEE) Fortune 500 company created by the combination of three Illinois utilities (CIPSCO Incorporated, CILCO Inc. and Illinois Power Company) and Union Electric Company of St. Louis.

As a utility Ameren owns the energy grid, lines and meters to your location. However, customers of Ameren Illinois have the choice of purchasing the natural gas and electricity supply from a third party supplier, as known an ESCO (Energy Services Company).

Ameren Service area map

  • What is the difference between a utility and a supplier?
    • A Third Party Supplier supplies the energy your business consumes and the utility delivers it through wires and poles to your facility.
  • Does it cost money to switch your business to another supplier?
    • There is no cost to enroll. To get find out how much you can save, simply enter basic information on your energy spend and shop rates from top supplier.
  • How many energy suppliers are in the market?
    • There are A LOT of natural gas suppliers in the Illinois energy market. Some serve all rate classes of customers, some specialize in small/medium and others only large customer classes. Diversegy only works with reputable commercial energy supply companies and will match you with energy suppliers that serve Ameren and your commercial rate class.
  • How do I find the best rate for me?
    • Step 1: Find a list of all licensed third party suppliers in your area of Illinois that serve your rate class. Step 2: reach out to every one of them. Step 3: request pricing. And finally, step 4: do a full rate comparison and choose which one that works best. But you would be missing a few key pieces. Did they price the same day? Did you know that energy prices could change daily? What does their contract say? Are they reputable? Is the price for consolidated billing or dual billing? Is the price fixed or index? Will it go up after 3 months or stay the same for the length of the contract. OR Contact us for a free complimentary analysis today and we can do all that for you, without having to be on your payroll.
  • When does Ameren change their rates?
    • Ameren changes their electric rates for residential customers by season. It is broken into two periods: for winter months, October through May and for summer months June through September. They do not publish their commercial rate price to compare. This can also change monthly through the ‘purchased electricity adjustment’ and ‘supply cost adjustment’.
  • What is a supply cost adjustment?
    • The Supply Cost Adjustment is designed to allow the utility to recover costs associated with procurement, working capital and uncollectible charges. The Supply Cost Adjustment is largely a fixed charge that changes only when the ICC makes changes to Ameren Illinois' delivery service rates, after an annual power supply procurement update, or pursuant to other Commission Orders.
  • What is ‘Purchased Electricity Adjustment’?
    • The "Purchased Electricity Adjustment" is a monthly charge that causes the electric supply charges to fluctuate above or below the established electric supply rate from one month to the next. The purpose of the Purchased Electric Adjustment is to "true-up" any difference (over or under) between what Ameren Illinois previously paid to acquire electric supply and what Ameren Illinois previously charged its customers for that electric supply.
  • Will suppliers charge anything similar to ‘Purchased Electricity Adjustment’ or ‘Supply Cost Adjustment’?
    • Some. However, the rates we display on our website include ‘all-in’ fixed rates that remain the same throughout the contract and will not have adjustments like the above. There are suppliers that will over an introductory rate, that is usually followed by a higher rate. There are other rate plans the only fix certain components of the rate. Diversegy reserves those types of plans for larger, more sophisticated customers where and when it makes sense. We do not display any of these types of rates on the website.
  • Do commercial energy taxes fluctuate?
    • Yes, federal, state and local government taxes contribute to the cost of energy for your business. Natural Gas prices have risen over the past few years due to the increase price in original materials cost. For more information:
  • Who is my current energy supplier?
    • You can look on your electricity bill under the supply section to identify your current supplier.
  • Who should I call about outages and repairs to my business?
    • You should still call Ameren. In case of a power outage, please call 1-800-755-5000. F
  • Where do I pay my bill? Do I pay it with Diversegy?
    • Most companies still pay your bill with Ameren.
  • Will I be double charged by both Ameren and the supplier I choose?
    • No, you will not be double charged. If you started off with the Ameren’s rates, your bill already has a supply and a distribution charge. Now that you are working with a third-party supplier, they will be the “supply” charge. The “distribution” charge will be the flat rate by Ameren for the lines and poles to deliver your power. Nothing else will change.
  • What does my bill look like for Ameren?
    • Click here to see a common natural bill for Ameren. Notice where the items on the bill are located that we need in order to do a full energy analysis for your business. These steps allow us to price to compare with over 35 third party energy suppliers.
  • What is the benefit of working with a company like Diversegy?
    • We help businesses in the commercial, industrial, and municipality sectors reduce costs, mitigate risk, and improve their bottom line by incorporating an energy strategy into their business. We offer a full energy rate comparison where we compare gas and electric rates from over 35 suppliers to help get you the best energy deal best suited for you and your business. While other brokers may do the same, with our state-of-the-art technology and techniques, we can get you what you need faster than ever before. Additionally, we offer a full suite of products and services to serve most of your commercial energy needs, including solar.
  • Why shouldn’t I stay with Ameren for energy supply?
    • You could stay with Ameren, but having a third party supplier often helps reduce energy costs and offers price stability. The service to your business will still be provided by Ameren, but the rate on your bill will be from a third party supplier. Please click on the free analysis button below to receive your complimentary commercial energy analysis to see if having a third party supplier is what’s best for you.

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