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Ameren Illinois Electric Choice Program

Integrys Energy serves residential and business customers in the Ameren Illinois electric service territories. Select where you're interest in electric supply service (home or business) and choose your Ameren Illinois Rate Zone (previously AmerenCIPS, AmerenCILCO, or AmerenIP) to view Integrys Energy's competitive electric rate plans.

Easy online enrollment can be completed in about 5 minutes, please have a copy of a recent Ameren electricity bill available to reference key account information.


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Save up to 23%1 on your electric rate for your home, apartment or condominium with Integrys Energy.

Choose Your Ameren Rate Zone

Integrys Energy Services offers a fixed price electricity rate that will bring you savings compared to Ameren’s current electricity Price to Compare. To enroll online, please be sure to have the following information about your Ameren account:

  • Account Number
  • Service and Mailing Address
  • Telephone Number

If you would prefer to enroll over the phone, please call us at (888) 619-7926.

The Ameren Illinois Electric Choice (PowerSwitch) program gives customers a choice in their energy supplier. Electricity delivery, meter reading and emergency response continue through Ameren. Electric choice competition can help you stabilize, or lower, your costs.

There are two main components of your electric service: supply (generation and transmission) and delivery (distribution). Delivery refers to the transmission facilities distributing the electricity provided by your electric supplier, as well as metering and related services. You have the option to purchase the supply portion of your electricity from an Alternative Retail Electric Supplier (ARES), like Integrys Energy Services, providing you the ability to proactively manage your energy costs.

Residential Power Purchase and Sale Terms and Conditions

ProgramAgreementFile Info
12-Month Fixed Price - Zone I(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages
24-Month Fixed Price - Zone I(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages
12-Month Fixed Price - Zone II(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages
24-Month Fixed Price - Zone II(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages
12-Month Fixed Price - Zone III(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages
24-Month Fixed Price - Zone III(Version #04-2011 electric fixed electronic)PDF: 115 KB / 2 pages

Residential Electric Pricing History

Integrys Energy Services, Inc. provides competitive rates for Ameren electric customers. You can find a history of our pricing here; prices may be updated at any time.

Rate PlanEffective MonthPrice (per kWh)
12-Month Fixed Price - Zone I12 Billing Cycle Term5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.18 ¢
October 2011 through 12 Billing Cycles5.18 ¢
24-Month Fixed Price - Zone I24 Billing Cycle Term5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.40 ¢
12-Month Fixed Price - Zone II12 Billing Cycle Term5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.18 ¢
October 2011 through 12 Billing Cycles5.18 ¢
24-Month Fixed Price - Zone II24 Billing Cycle Term5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.40 ¢
12-Month Fixed Price - Zone III12 Billing Cycle Term5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.10 ¢
through 12 Billing Cycles5.18 ¢
October 2011 through 12 Billing Cycles5.18 ¢
24-Month Fixed Price - Zone III24 Billing Cycle Term5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.25 ¢
through 24 Billing Cycles5.40 ¢

Residential Frequently Asked Questions

  • How do I sign up (enroll) with Integrys Energy?
  • Signing up with Integrys Energy for your home, condo or apartment is easy and takes about 5 minutes. You will want to have copy of a recent electric utility bill. From Integrys' Ameren program overview page click on the ‘Enroll’ button, and complete the Customer Information form. You will receive an email confirmation of your enrollment request, including your unique confirmation number and a links to the product Terms and Conditions.

    If you prefer to enroll by telephone, please call (888) 619-7926.

    Upon successful enrollment you will receive written notification from your current utility company, Ameren, confirming your choice and your utility bill will reflect the switch to Integrys Energy Services.

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  • Why do I need my utility account number for enrollment?
  • In order to enroll with we must have your active utility account number so that we can inform the utility of your choice to switch. The utility information is the key piece of information in communicating your electricity supply switch with your utility.

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  • Will I save money by switching?
  • Integrys Energy Services strives to offer a very competitive rate compared to the current standard utility. Integrys Energy's currently posted rate is 8.05% lower than Ameren’s current Price to Compare for residential non-heating customers. Savings result from a comparison of Integrys’ fixed rate for identified delivery classes for a 12 billing cycle (July 2011 meter read to July 2012 meter read) term, as compared to Ameren’s June 2011 to September 2011 fixed rate (Ameren’s electric supply charge, plus Ameren's fixed portion of the supply cost adjustment, plus Ameren’s transmission services charge). Comparison does not include Ameren delivery charges or Ameren’s “purchased electricity adjustment”. Ameren’s rates will change each June and October. Price to Compare is based on the ICC's Plug In Illinois website.

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  • Who do I call if I have questions about my bill?
  • If you have questions on the delivery portion of your bill, you should call your local utility. For questions about the supply portion of the bill, please call our customer service line at 1-888-619-7926.

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  • How will I be billed? Will I receive 2 bills?
  • You will continue to receive one bill from your electric utility (Ameren) that details the Integrys Energy (electric supplier’s) charges separately. Please see a sample Ameren bill.

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  • Is there a cancellation fee?
  • Yes, residential customers will be charged a one-time fee of $50 if your agreement is terminated without cause before the term has expired. Please see Terms and Conditions for full details.

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  • Who do I call if my power goes out?
  • Please call your utility, Ameren, at 1-800-755-5000 for all emergency or technical problems. The utility is still responsible for the safe and reliable delivery of the electricity you purchase, whether you purchase your electricity from the utility or a supplier.

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  • Do I have to enroll online?
  • No, you may call our 24/7 Customer Service line at (888) 619-7926 and they will be glad to take your enrollment over the phone.

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  • I currently get my electricity from my municipality. Can I switch to Integrys Energy?
  • No. The Integrys Energy Services program is for customers served by Ameren.

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