Illinois electricity rates (August 2026)

Average residential and commercial electricity prices in Illinois from EIA's monthly utility survey, with the trend, the largest utilities and what power costs a typical homeowner.

Residential rate

19.32¢

▲ 7.2% vs a year agoper kWh, August 2026; ranks 18 of 51 (1 = highest)

Commercial rate

14.67¢

per kWh, August 2026

Average home bill

$132

per month over the last 12 months, about 697 kWh

U.S. residential average

18.16¢

Illinois is 6% above the U.S. average.

Find your utility's rate by ZIP

Illinois vs U.S. residential rate

Cents per kWh by month, last 36 months.

Last 12 months in Illinois

Month	Residential	Commercial	U.S. residential	Avg kWh	Avg bill
August 2026	19.32¢	14.67¢	18.16¢	886	$171
July 2026	19.22¢	15.19¢	18.31¢	1,005	$193
June 2026	19.89¢	14.53¢	18.34¢	718	$143
May 2026	23.85¢	15.37¢	18.44¢	514	$123
April 2026	20.47¢	13.89¢	18.86¢	538	$110
March 2026	18.85¢	13.08¢	18.60¢	612	$115
February 2026	17.83¢	13.34¢	17.65¢	719	$128
January 2026	16.36¢	12.26¢	17.45¢	812	$133
December 2025	17.05¢	12.44¢	17.11¢	763	$130
November 2025	18.28¢	13.24¢	17.77¢	572	$105
October 2025	18.70¢	13.68¢	17.95¢	572	$107
September 2025	19.01¢	14.03¢	18.05¢	653	$124

Largest utilities in Illinois

Residential rates for the biggest utilities in Illinois that report monthly to EIA, ordered by number of homes served, for August 2026.

Utility	Type	Rate	Avg kWh	Avg bill	Homes
Commonwealth Edison Co	Investor Owned	19.28¢	747	$144	3,059,080
Ameren Illinois Company	Investor Owned	19.42¢	1,054	$205	634,558
MidAmerican Energy Co	Investor Owned	16.41¢	719	$118	73,380
Mt Carmel Public Utility Co	Investor Owned	21.61¢	1,219	$263	4,282

What electricity adds to owning a home in Illinois

A typical Illinois home is valued at $295,943 (Zillow). With 10% down at this week's 7.24% 30-year rate, principal and interest come to about $1,815 a month. The average electric bill of $132 adds about 7% on top of that, or $1,582 a year. See Illinois property tax and closing costs or run the monthly payment.

Bills follow the seasons: in Illinois the highest-use month of the last year averaged 1,005 kWh per home and the lowest 514 kWh. Budget for the expensive months, not the average.

Common questions

What is the average electricity rate in Illinois?

Homes in Illinois paid an average of 19.32 cents per kWh in August 2026, 6% above the U.S. average of 18.16 cents (EIA Form 861M).

How much is the average electric bill in Illinois?

Over the last 12 months the average Illinois home used about 697 kWh a month and paid about $132 a month.

Have Illinois electricity rates gone up?

The residential rate is 7.2% higher than in August 2025, when it was 18.03 cents per kWh.

What do businesses pay for electricity in Illinois?

Commercial customers in Illinois paid 14.67 cents per kWh in August 2026.

Electricity rates in all statesRanked table and ZIP lookup Illinois buying costsProperty tax, transfer tax and closing costs Illinois buyer programsDown payment help where you live

Sources: U.S. Energy Information Administration (EIA), Form EIA-861M monthly sales and revenue (state and utility data, latest month August 2026; EIA marks recent months preliminary and may revise them); ZIP-to-utility map: OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zip Code (2024), CC BY 4.0. Rates are average revenue per kWh (total bill divided by kWh sold), so they include fixed and delivery charges. EIA posts each month about eight weeks after it ends; this page checks for new data every morning.