A 6 percent rate decrease for Ameren customers in Missouri will take effect on Wednesday.
The rate cut is $167 million. It was approved last month, to savings resulting from the federal Tax Cuts and Jobs Act of 2017. It reduced tax rates to 21 percent from 35 percent.
The rate cut for Ameren customers was allowed by a state law that changed the way utilities like Ameren are regulated by the Missouri Public Service Commission.