According to a report issued by Strategen Consulting, Inc., Ameren and Spire customers have experienced significant recent increases in their utility bills, outpacing both national inflation (25.4%) and Missouri average weekly wage growth (32%). This report focuses on the years 2020 – 2025.

Ameren Missouri customers saw major electricity bill increases that outpaced both inflation and wage growth.
• Average summer bills rose 34.3%
• Average winter bills rose 32.9%
These increases are not driven by fuel costs. Ameren’s fuel charge has stayed relatively steady. Higher rates tied to infrastructure investments were the main driver.

Spire Missouri customers faced even steeper increases in natural gas bills.
• Spire West winter bills rose 95.1% for a typical household using 120 ccf
• Spire East winter bills rose 60.8%  for the same usage
Winter gas bills rose far more than summer bills because gas is mainly used for home heating. 

Read the full report here: MO IOU Rate Analysis 2025

On June 28, 2024, Ameren Missouri filed a request for approval of a +15% increase in electric utility rates designed to increase Ameren’s gross revenues by approximately +$446.2 million. Consumers Council has intervened in this case.