Electricity rates Illinois

How Illinois electricity rates work

Two utilities deliver most of Illinois's power: ComEd in the Chicago region and northern Illinois, and Ameren Illinois in central and southern Illinois. Customers who do not choose a supplier buy supply from their utility at its price to compare; the rest buy from a retail supplier or a municipal aggregation program, and the utility still delivers.^[eia861] Plug In Illinois, run by the Illinois Commerce Commission, posts each utility's price to compare: the electric supply charge plus the transmission services charge. Prices differ between summer (June through September) and non-summer months (October through May).^{[il_comed][il_ameren]}

A supplier's supply price below these numbers saves money on the supply part of the bill; delivery and taxes are charged on top either way. ComEd's figure excludes its monthly purchased electricity adjustment.^[il_comed]

• Supply: the price to compare, or your supplier's contract price.
• Delivery: the utility's distribution and customer charges, the same whoever supplies you.
• Taxes and riders: state and municipal taxes and other charges on the bill.

ComEd and Ameren electricity rates

In 2024 ComEd's full-service residential customers paid 15.22¢ per kWh all-in and Ameren Illinois's paid 15.26¢. For homes buying supply elsewhere, the utilities' delivery revenue averaged 7.93¢ per kWh at ComEd and 8.29¢ at Ameren.^[eia861] ComEd homes used 583 kWh a month on average against 853 at Ameren, which is why Ameren's average bill ($130.20) was higher than ComEd's ($88.72).

Do Illinois shoppers pay less?

1,345,866 Illinois homes (25%) bought supply from suppliers or aggregations in 2024. Their supply averaged 9.75¢ per kWh; adding the utilities' average delivery revenue of 8.09¢ gives roughly 17.84¢ all-in, against 15.11¢ for utility full-service customers.^[eia861] The averages mix many contracts and both utility areas, so check any offer against your own utility's current price to compare (10.103¢ at ComEd this winter).^[il_comed]

Illinois electricity price by month

The Illinois price peaks in summer: 23.85¢ in May 2026. The 12-month average moved from 17.10¢ to 18.91¢.^[eia861m]

Illinois ranks 16 of 51 for residential price. Neighbors: electric rates Ohio and the full electricity rates by state table. Many Illinois homes heat with natural gas; compare that bill on average gas bill, and test a heat pump on heat pump vs furnace cost.