Proposal reflects improvements already in service, keeps base rates well below the Midwest average and expands customer assistance
Key takeaways:
Ameren Missouri's base electric rates are not changing until mid-2027.
Regulators will review grid investments currently benefiting customers.
The request reflects expected base rate savings of $21 million over the next two years because of future large load customers.
The filing includes a new income-eligible rate discount that offsets the proposed rate adjustment for our most vulnerable customers.
Customers can visit AmerenMissouri.com/InvestingInMissouri for more information and resources to help manage their monthly energy bill.
ST. LOUIS, June 26, 2026 /PRNewswire/ -- Ameren Missouri has filed a request with the Missouri Public Service Commission (PSC) to recover the costs of electric system upgrades and construction of new power generation assets, providing significant reliability and economic benefits to Missouri families and businesses. The PSC will conduct a thorough, 11-month review before new base electric rates take effect in mid-2027.
"Our responsibility is to provide safe, reliable and affordable service for Missouri families and businesses. Those customers expect the lights to come on every time they flip the switch, especially during the ever more frequent extreme weather," said Aaron Melda, chairman and president of Ameren Missouri, a subsidiary of Ameren Corporation (NYSE: AEE). "The investments we are making today are supporting reliability and strengthening storm resilience. The results are already showing up in fewer outages and better service for the communities we serve."
Melda noted that from January 2025 through May 2026, the installation of storm-resistant electric infrastructure and smart technology helped prevent more than 260,000 customer outages during major storms, reducing service disruptions for customers.
If approved by regulators, the proposed change in mid-2027 would increase the average residential electric bill with 1,011 kilowatt-hours of usage by about $13 a month.
Today, residential rates for Ameren Missouri customers are approximately 27% below Midwest and national averages and are the lowest among Missouri's investor-owned utilitiesi. Ameren Missouri's residential base rates are expected to remain well below those averages even if this request is approved.
Key components of the rate adjustment request include:
Strengthening the grid and investing in smart technology through Ameren Missouri's Smart Energy Plan, which has made the electric system more dependable for families and businesses.
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Rebuilding electric distribution lines with storm-hardened upgrades throughout North St. Louis and Southeast Missouri after tornadoes and severe weather severely damaged critical infrastructure in spring 2025.
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Replacing aging infrastructure with new, upgraded power lines with increased capacity, supporting resiliency and providing flexibility to reroute power during an outage while crews safely make repairs.
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Adding and upgrading substations with smart technology to detect outages faster and restore power more quickly.
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Upgrading utility poles, many fortified with stronger composite materials, to better withstand severe weather, reduce damage and speed restoration of service.
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Utilizing Missouri-based suppliers and contractors to help deliver these projects, supporting local jobs and economic development.
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Upgrading energy generation sources to keep dependable power available when customers need it through improvements to the Labadie Energy Center and upgrades to the Audrain Energy Center to enable dual-fuel operation in extreme weather conditions.