Compare Illinois electricity rates and plans (May 2026)

Illinois electricity rates vary, but the average residential rate is around 17.04 cents per kWh, with a monthly bill averaging $116.38.

Find electricity plans in your area
Brogan Woodburn
Alex Zdanov
Fact checked by Alex Zdanov
Published March 31, 2025

What to know about electricity rates in Illinois

  • The average Illinois electricity rate is 17.04 cents per kWh while the average national rate is 16.82 cents
  • The cheapest electricity rate is 10.15 cents per kWh for Illinois residents
  • Illinois's deregulated electricity market includes 111 providers

Best Illinois electricity rates

Illinois electricity rates range from 10.15 cents to 23.63 cents per kWh. The rates you find vary depending on the providers and plans available to you, and comparing companies is the best way to find better rates. Below are some rates from popular electric companies in Illinois.

What is the cheapest electricity company in Illinois?

RankProviderServiceRate (c/kWh)Customers
1Homefield EnergyEnergy6.07106,072
2Dynegy Energy ServicesEnergy7.0150,654
3AEP EnergyEnergy7.0946,873
4ResCom EnergyEnergy8.1793
5MC Squared Energy ServicesEnergy8.45129,489
6CleanSky EnergyEnergy8.79346
7First EnergyEnergy9.18133,648
8Eligo EnergyEnergy10.0014,389
9MidAmerican EnergyBundled10.2486,115
10Realgy Energy ServicesEnergy10.2615,148

Because Illinois has a deregulated electricity market, you have the flexibility to shop around for a cheaper electricity bill. Many states don't offer this choice. If you're looking to reduce your energy bill, consider switching to a different provider or plan. Illinois electricity providers offer different types of plans for residents and businesses to satisfy a range of needs.

Average cost of electricity in Illinois

According to our data, the average electricity rate in Illinois is 17.04 cents per kWh. This equates to an average residential bill of $116.38 per month. The national average rate is 16.82 cents per kWh, and Illinois ranks as the 34th lowest priced state in the nation.

RateUsageBill
Illinois Average17.04c683 kWh$116.38
United States Average16.82c875 kWh$147.24

Since the average price is 17.04 cents per kWh or $116.38 per month for residential electricity, prices lower than these can be considered affordable. Electricity rates in Illinois depend on your home size and usage, so the kWh rate is more useful when comparing your rate to the average.

Best electricity plans

In Illinois, the best electricity plans provide competitive rates, renewable energy options, and fixed or variable pricing. Top providers offer reliability, transparency, and customer incentives so you can save money and enjoy responsive support.

We've analyzed the prices, terms, and conditions of popular Illinois electricity plans. Below are our picks for the best residential plans in the state.

Provider Contract Term Rate Plan
Constellation Energy logo
36
months
7.99¢
/kWh
Constellation Energy logo
12
months
8.19¢
/kWh
Energy Harbor logo
18
months
8.39¢
/kWh
Energy Harbor logo
24
months
8.48¢
/kWh
Energy Harbor logo
32
months
8.68¢
/kWh
Energy Harbor logo
36
months
9.09¢
/kWh
Just Energy logo
36
months
9.89¢
/kWh
Just Energy logo
24
months
10.09¢
/kWh
Just Energy logo
24
months
10.19¢
/kWh
Constellation Energy logo
36
months
10.59¢
/kWh
Constellation Energy logo
12
months
10.69¢
/kWh
Just Energy logo
36
months
11.39¢
/kWh
Just Energy logo
24
months
11.59¢
/kWh
Constellation Energy logo
36
months
55.9¢
/kWh
Constellation Energy logo
12
months
57.9¢
/kWh
Constellation Energy logo
36
months
57.9¢
/kWh
Constellation Energy logo
12
months
59.9¢
/kWh
Just Energy logo
36
months
70.9¢
/kWh
Just Energy logo
36
months
72.9¢
/kWh
Just Energy logo
36
months
77.9¢
/kWh
See All Plans

Compare Illinois electricity providers

There are 111 electricity providers in Illinois. While some providers only serve specific areas, you have multiple options for electricity wherever you are. Different providers can offer different specials, plan types, and sales throughout the year. However, always read the fine print of the energy plans you consider to avoid hidden penalties.

Residential electricity providers in Illinois

Provider Service Type Rate (c/kWh) Rate State Rank Bill Bill State Rank
Homefield Energy Energy 6.07 1 $61.27 2
Dynegy Energy Services Energy 7.01 2 $67.14 7
AEP Energy Energy 7.09 3 $63.90 4
ResCom Energy Energy 8.17 4 $9.55 1
MC Squared Energy Services Energy 8.45 5 $70.31 9
CleanSky Energy Energy 8.79 6 $164.08 82
First Energy Energy 9.18 7 $71.55 12
Eligo Energy Energy 10.00 8 $69.90 8
MidAmerican Energy Bundled 10.24 9 $76.68 13
Realgy Energy Services Energy 10.26 10 $78.42 15

Showing 10 of 111 providers

Business electricity rates in Illinois

Commercial rates are typically cheaper than residential rates in Illinois because businesses consume much more energy than homes on average. Businesses basically get a volume discount on electricity since they use so much. Our data shows the average business in Illinois pays 14.49 cents per kWh for electricity and has an average bill of $426.05 per month.

RateUsageBill
Illinois Average14.49c2,940 kWh$426.05
United States Average12.43c5,742 kWh$713.88

Finding ways to reduce overhead costs is essential as a business owner. You have the opportunity to do that in a deregulated electricity market. Even reducing your electricity by one or two cents per kWh can make a huge difference when you have a high monthly bill. Compare commercial electricity rates to find the plan that makes the most sense for your business.

Best commercial electricity plans

Below are the top commercial electricity plans in Illinois.

Provider Contract Term Rate Plan
Constellation Energy logo
3
months
33.11¢
/kWh
Constellation Energy logo
3
months
30.24¢
/kWh
Constellation Energy logo
6
months
39.42¢
/kWh
Constellation Energy logo
6
months
46.50¢
/kWh
Constellation Energy logo
6
months
46.00¢
/kWh
Santanna Energy logo
6
months
50.82¢
/kWh
Santanna Energy logo
6
months
51.29¢
/kWh
Santanna Energy logo
12
months
45.89¢
/kWh
Constellation Energy logo
12
months
41.87¢
/kWh
Constellation Energy logo
12
months
46.50¢
/kWh
Santanna Energy logo
12
months
46.89¢
/kWh
Constellation Energy logo
9
months
42.20¢
/kWh
Constellation Energy logo
9
months
46.50¢
/kWh
Constellation Energy logo
12
months
46.00¢
/kWh
Constellation Energy logo
9
months
46.00¢
/kWh
Constellation Energy logo
18
months
43.81¢
/kWh
Constellation Energy logo
18
months
46.50¢
/kWh
Santanna Energy logo
18
months
53.92¢
/kWh
Santanna Energy logo
18
months
53.12¢
/kWh
Constellation Energy logo
18
months
46.00¢
/kWh
See All Plans

How to switch Illinois electricity companies

Wondering how to make the switch to a new electricity provider in Illinois? The process is straightforward and won't disrupt your service.

First, review your current agreement's terms, then select either a new Retail Electric Supplier (ARES) or return to utility providers like ComEd or Ameren.

Key steps to switch providers:

  • Compare rates among certified suppliers through the Illinois Commerce Commission
  • Choose your preferred supplier and plan
  • Let the new supplier handle the transfer process
  • Wait for the change to take effect on your next meter reading

You won't need any home visits, and your electricity service will continue uninterrupted throughout the switch.

When is the best time to switch energy providers in Illinois?

Determining the ideal time to switch energy providers in Illinois requires careful consideration of market trends and seasonal price fluctuations.

You'll want to review your current rates during spring and fall when energy prices typically stabilize between peak seasons.

Before making a switch, you should:

  • Compare your utility's "Price-to-Compare" with alternative supplier rates
  • Review the Illinois Power Agency's procurement plans for upcoming price trends
  • Evaluate whether long-term contracts align with current market conditions

Remember that regulated utilities often provide the most stable rates year-round.

How deregulated electricity works in Illinois

Since Illinois deregulated its electricity market in 1997, you've had the power to choose your electricity provider from multiple Alternative Retail Electric Suppliers (ARES).

The system works through a split structure where utilities like ComEd and Ameren Illinois maintain the power lines while ARES compete to sell you electricity.

You'll receive two main services:

  • Delivery (from your utility company)
  • Supply (from your chosen ARES or utility)

The Illinois Commerce Commission oversees the market to guarantee fair competition, while the Illinois Power Agency helps secure competitive rates.

You can choose between fixed rates, variable rates, or green energy options through municipal aggregation programs.

Types of electricity plans in Illinois

Illinois offers four main types of plans that cater to different needs and preferences.

Fixed-rate plans provide stable pricing throughout your contract term, typically lasting 12-36 months. While you'll pay early termination fees for canceling, you'll enjoy predictable monthly bills.

Variable-rate plans adjust monthly based on market conditions. You won't face termination fees, but rates can spike during high-demand periods.

No-deposit and prepaid plans offer flexibility in payment structure. You can either start service without an upfront deposit or pay in advance.

Green energy plans support renewable sources through RECs, though they may cost slightly more than traditional options.

Compare Illinois electricity rates

Compare Illinois electricity rates to save money and avoid overpaying in the deregulated market. Your bill can vary greatly depending on the provider and plan structure. Take the time to read the fine print and do the math to figure out which is your best option.

Illinois electricity rates vs other states

Electricity rates for the biggest cities in Illinois

Illinois electricity rate FAQs

Brogan Woodburn
Written by
Content Lead

Brogan Woodburn is a writer who enjoys working with data to help people make informed purchasing decisions. With a keen eye for research and analysis, he creates content that breaks down complex topics—whether it’s choosing the right products, understanding consumer trends, or navigating important buying decisions. His work has been read by thousands and featured on sites like USA Today and MarketWatch. Whether diving into technical details or uncovering the best options for consumers, Brogan’s goal is to provide clear, reliable, and data-driven insights that help people make confident choices. Outside of writing, he’s also a professional guitarist, performing jazz and classical music throughout Central Oregon.

Alex Zdanov
Fact checked by
CTO of PowerOutage.us

Alex Zdanov is passionate about transforming complex data into clear, actionable insights. With extensive experience in data administration and pipeline management, Alex ensures data is delivered to consumers with the utmost accuracy. His background in electrical engineering further equips him to emphasize the real-world implications of the data he presents.

More energy solutions

Keep your home powered and your bills low.