Ameren Illinois Raises Summer Supply Rate to 11.326 Cents
ameren illinois customers will pay more for electricity from June 1 through September 30 after the summer supply price rose to 11.326 cents per kilowatt-hour. For households trying to keep bills in check, the immediate choice is whether to stay with the utility’s supply or compare offers that may look cheaper at first glance.
11.326 Cents Through September 30
11.326 cents per kilowatt-hour is roughly 39% higher than Ameren’s summer supply rate two years ago. Rising electricity demand, including demand from new and proposed data centers, is among the forces pushing prices higher, and that leaves customers facing a hotter bill during the same months when usage typically climbs.
$2 billion is what Illinois consumers have lost to alternative electricity suppliers since 2015, according to the Citizens Utility Board. That history gives the latest summer rate change a sharper edge: a lower headline rate from another supplier does not automatically mean a lower bill once teaser pricing, added monthly fees, or contract terms are included.
Citizens Utility Board Warning
Citizens Utility Board says Ameren is the better deal, and it warns that many alternative supplier offers could end up costing customers more. The organization points to introductory rates that later rise, hidden fees, and automatic renewals, all of which can turn a short-lived discount into a longer stretch of higher charges.
Alternative suppliers only affect the supply portion of an electric bill, so they do not protect customers from future utility delivery-rate increases. Residents should also avoid sharing utility bills or account numbers with door-to-door sales representatives to prevent unauthorized supplier switches, known as slamming.
Ameren's Next Rate Window
October 2026 through May 2027 is the next supply-rate period Ameren expects to lower, although it has not been finalized. For now, customers who want to keep bills low have three concrete moves from CUB: improve energy efficiency, check payment-assistance programs, and compare any supplier offer carefully before switching.
