Ameren serves customers in Illinois. This guide covers current rates, billing structure, common charges, and how to verify your bill is accurate.
Quick Facts
Service Area: Eastern and central Missouri (St. Louis metro, Jefferson City, Cape Girardeau)
Rate Range: 10¢–16.4¢/kWh
Standard Rate: ~12.6¢/kWh (Standard Residential (1M))
Off-Peak Rate: 10¢/kWh (Smart Savers)
Rates Updated: January 2026
Current Rates
Ameren residential rates range from 10¢–16.4¢/kWh depending on your rate plan. The standard Standard Residential (1M) plan has an effective rate of ~12.6¢/kWh. Time-of-use customers on the Smart Savers plan pay 10¢/kWh off-peak and 40.6¢/kWh during peak hours. Rates last updated January 2026.
Understanding Your Bill
Your Ameren bill includes several components: base charges, energy charges, fuel adjustments, taxes, and fees.
Ameren residential rates vary by state and service territory. In Illinois, rates range from 8–14¢/kWh for delivery, with supply charges separate. In Missouri, bundled rates typically range from 10–16¢/kWh. Your effective rate depends on your rate plan and whether you have an alternative supplier.
Why is my Ameren bill so high?
High Ameren bills can result from seasonal usage changes, fuel adjustment clause increases, or being on a suboptimal rate plan. Illinois customers may also see high bills from alternative supplier markups. Upload your bill to verify all charges are calculated correctly.
What is the Ameren fuel adjustment clause?
The Fuel Adjustment Clause (FAC) on your Ameren bill adjusts based on actual fuel costs for electricity generation. It changes periodically and can increase or decrease your bill. Utility Check verifies this adjustment against Ameren's published FAC rates.
How can I verify my Ameren bill is correct?
Upload your Ameren bill to Utility Check. We recalculate supply charges, delivery charges, fuel adjustment clause, and all applicable riders. If you have an alternative supplier in Illinois, we verify those charges against your contract terms.
Does Utility Check support Ameren?
Yes. Utility Check supports both Ameren Illinois and Ameren Missouri bill verification. We verify supply charges, delivery charges, fuel adjustments, and all applicable surcharges for both service territories.