Compare The Best Illinois Electricity and Natural Gas Providers and Rates

Author:
Tim Wasson
Editor:
Matt Oberle
Last Updated:
10-23-2025
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About Constellation

Constellation prices were consistent, easy access to account info. We had no problems to contact them.

- Gustafson from Cherry Valley

Electricity Plan
  • 12 months
  • Plan MRC $0
12.990¢
effective rate per kwh

12 Month Home Power Plan

Call 866-630-0685
Natural Gas Plan
  • 12 months
  • Plan MRC $0
$0.599
effective rate per Therm

12 Month Home Natural Gas Plan

Call 866-630-0685
Rates as of Oct 31, 2025 at 04:08 PM

Illinois Electricity and Natural Gas Choice

In Illinois you can choose the company you buy electricity or buy natural gas from.

You can select from the best rates, plans, and terms that best fit you.

Power to choose

Illinois' Best Energy Providers

We've rated the energy companies in Illinois based on multiple criteria, including BBB and regulatory complaints, plan types and availability, ease-of-use, and much, much more.

Compare Companies
#1
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Recommended Illinois Electricity Plans

Select Your Utility

    • I normally use:
      1,000
      kWh per month
    6 Month Fixed Rate

    Recommended

    10.4 ¢ effective rate per kwh

    6 Month Home Power Plan

    or call call: 866-630-0685
    • 6
    • monthsmo.
    • Fixed Rate
    • 0% Green Energy
    • Plan MRCMRC
    • $ 0
    6 Month Home Power Plan Details

    Our Assessment:

    This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

    You will have more predictable bill based solely on your usage.

    Plan Renewal:

    If you order this plan and start it today, you will be up for renewal 6 months from now in May of 2026.

    Since this plan expires in May, you can take advantage of seasonally lower rates when you renew.

    Electricity rates are generally highest from June through September.

    • Early Termination Fee: $50
    • fixed-rate
    • 6 Months
    12 Month Fixed Rate

    Recommended

    10.9 ¢ effective rate per kwh

    SureLock 12

    Check Availability
    • 12
    • monthsmo.
    • Fixed Rate
    • 0% Green Energy
    • Plan MRCMRC
    • $ 4.99
    SureLock 12 Details

    Our Assessment:

    This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

    You will have more predictable bill based solely on your usage.

    Plan Renewal:

    If you order this plan and start it today, you will be up for renewal 12 months from now in October of 2026.

    Since this plan expires in October, you can take advantage of seasonally lower rates when you renew.

    Electricity rates are generally highest from June through September.

    • Early Termination Fee: $0.00
    • Monthly Recurring Charge: $4.9900
    • fixed-rate
    • 12 Months
    Check Availability
    12 Month Fixed Rate

    Recommended

    10.9 ¢ effective rate per kwh

    Think Clean 12

    or call call: 844-945-3737
    • 12
    • monthsmo.
    • Fixed Rate
    • 100% Green Energy
    • Plan MRCMRC
    • $ 0
    Think Clean 12 Details

    Our Assessment:

    This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

    You will have more predictable bill based solely on your usage.

    Plan Renewal:

    If you order this plan and start it today, you will be up for renewal 12 months from now in October of 2026.

    Since this plan expires in October, you can take advantage of seasonally lower rates when you renew.

    Electricity rates are generally highest from June through September.

    • Early Termination Fee: $0 (Residential Customers Only)
    • fixed-rate
    • 12 Months
    6 Month Fixed Rate

    Recommended

    12.3 ¢ effective rate per kwh

    6-Month Electric Choice Plan

    • 6
    • monthsmo.
    • Fixed Rate
    • 0% Green Energy
    • Plan MRCMRC
    • $ 0
    6-Month Electric Choice Plan Details

    Our Assessment:

    This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

    You will have more predictable bill based solely on your usage.

    Plan Renewal:

    If you order this plan and start it today, you will be up for renewal 6 months from now in May of 2026.

    Since this plan expires in May, you can take advantage of seasonally lower rates when you renew.

    Electricity rates are generally highest from June through September.

    • fixed-rate
    • 6 Months
    Plan Details
    • Digital Affiliate 6 Mo Fixed, No Frills
    View More Electricity Plans

    Recommended Illinois Electricity Plans

      • I normally use:
        1,000
        kWh per month
      12 Month Fixed Rate

      Recommended

      $ 0.519 effective rate per therm

      Guard 12

      or call call: (866) 605-8658
      • 12
      • monthsmo.
      • Fixed Rate
      • 0% Green Energy
      • Plan MRCMRC
      • $ 4.95
      Guard 12 Details

      Our Assessment:

      This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

      You will have more predictable bill based solely on your usage.

      Plan Renewal:

      If you order this plan and start it today, you will be up for renewal 12 months from now in October of 2026.

      You might consider a different length plan, because this plan will expire in October when rates are seasonally higher.

      Natural Gas rates are generally highest from October through February.

      • Monthly Recurring Charge: $4.95
      • fixed-rate
      • 12 Months
      12 Month Fixed Rate

      Recommended

      $ 0.499 effective rate per therm

      Fixed-Rate Gas 12

      or call call: (866) 605-5102
      • 12
      • monthsmo.
      • Fixed Rate
      • 0% Green Energy
      • Plan MRCMRC
      • $ 0
      Fixed-Rate Gas 12 Details

      Our Assessment:

      This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

      You will have more predictable bill based solely on your usage.

      Plan Renewal:

      If you order this plan and start it today, you will be up for renewal 12 months from now in October of 2026.

      You might consider a different length plan, because this plan will expire in October when rates are seasonally higher.

      Natural Gas rates are generally highest from October through February.

      • fixed-rate
      • 12 Months
      12 Month Fixed Rate

      Recommended

      $ 0.599 effective rate per therm

      SureLock 12

      Check Availability
      • 12
      • monthsmo.
      • Fixed Rate
      • 0% Green Energy
      • Plan MRCMRC
      • $ 0
      SureLock 12 Details

      Our Assessment:

      This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

      You will have more predictable bill based solely on your usage.

      Plan Renewal:

      If you order this plan and start it today, you will be up for renewal 12 months from now in October of 2026.

      You might consider a different length plan, because this plan will expire in October when rates are seasonally higher.

      Natural Gas rates are generally highest from October through February.

      • Early Termination Fee: $0.00
      • fixed-rate
      • 12 Months
      Check Availability
      View More Natural Gas Plans

      Featured Plan

        • I normally use:
          1,000
          kWh per month
        Plan Details

        6 Month Home Power Plan

        10.4 ¢ /kwh
        6 Months Locked Rate
        • 0% Green Energy
        $0 MRC per month
        Fixed Rate Plan Type
        $50 Termination Fee
        or call call: 866-630-0685

        Our Assessment:

        This is a "No Gimmicks" Fixed Rate plan which means you have a consistent energy charge of -¢ per kWh no matter how much (or little) energy you use.

        You will have more predictable bill based solely on your usage.

        Plan Renewal:

        If you order this plan and start it today, you will be up for renewal 6 months from now in May of 2026.

        Since this plan expires in May, you can take advantage of seasonally lower rates when you renew.

        Electricity rates are generally highest from June through September.

        • Early Termination Fee: $50
        • fixed-rate
        • 6 Months

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