Commercial electricity rates in Illinois

What businesses in Illinois actually paid per kilowatt-hour, from EIA's monthly utility filings. Updated monthly.

The last 36 months

Range over the period shown: 10.72¢ to 15.37¢ per kWh. Each point is a monthly state average, not an offered rate.

Illinois by the numbers

How commercial compares with other sectors

All figures are August 2026 averages for Illinois.

Commercial customers in Illinois pay 24% less per kWh than households there. Nationally the commercial price sits 20% below residential, so the gap here is wider than usual.

What this costs a typical account

The average commercial account in Illinois used 6,286 kWh in August 2026. At 14.67¢ per kWh that is about $922 for the month — computed from EIA totals, so it is the average account, mixing a large facility with a corner shop.

How the price has moved

Over the 36 months to August 2026, Illinois's commercial price rose 29.8%, from 11.30¢ in September 2023 to 14.67¢. The high point was 15.37¢ in May 2026 and the low 10.72¢ in December 2023 — a spread of 43% between the cheapest and dearest month, which is unusually volatile for a state-level average.

Across the same period the dearest month on average was July (13.62¢) and the cheapest December (11.64¢), a seasonal swing of 17%.

Illinois against its region

Illinois is in EIA's East North Central division, where the commercial average was 13.95¢ in August 2026. Illinois is 5% above that, and 4 of 5 on price within the region.

Others in the region: Ohio, Indiana, Wisconsin, Michigan.

States priced near Illinois

Source

EIA Electric Power Monthly, retrieved 2026-11-02 · methodology · all 51 states