Illinois Rate Facts Ameren Illinois Utilities

 More predictable rates

News - On April 19, 2013, the annual update for the electric formula rates was filed with the Illinois Commerce Commission.

Get information on the 2011 Energy Infrastructure Modernization Act and how it established a more predictable method of setting electric delivery service rates, called “formula” rates. Read more about MAP.


Energy-saving tips, tools and incentives at 

Get the Facts about energy prices and rate cases.

Every time you flip a light switch or turn the knob on the stove, we know you’re counting on us. It takes a lot of pipes, wires and people to deliver the electricity and natural gas you rely on, 24 hours a day, every day. Ameren Illinois covers nearly 44,000 square miles and serves millions of people at home and in businesses.

When delivery costs rise, we need to adjust our prices to keep serving your needs safely. But we’re regulated, so we first have to file a “rate case” and request regulatory approval. What does that mean to you? This site will answer all your questions.