Deregulated Energy in Illinois: Compare Electricity, Internet & Home Services
If you live in Illinois, you have more control over your energy bills than most Americans realize. Illinois deregulated its electricity market in 1997, giving residents across the state the right to choose their own electricity and natural gas supplier. Whether you are in Chicago, the suburbs, or downstate Ameren territory, this guide covers the best deregulated energy Illinois electricity suppliers, how to switch, and what other household services you can shop to maximize your savings in 2026.
Illinois Energy Deregulation: What It Means for You
Illinois has two major electric utilities — ComEd (northern Illinois, including Chicago and suburbs) and Ameren Illinois (central and southern Illinois). Both are fully open to retail competition under the Illinois Commerce Commission (ICC). This means you can choose a licensed Alternative Retail Electric Supplier (ARES) for the supply portion of your electricity bill, while ComEd or Ameren continues to deliver the electricity, handle outages, and maintain the power lines.
The supply portion of your bill typically represents 40–50% of your total electricity cost. When you switch to a competitive ARES supplier offering a fixed rate below the utility default, that savings applies directly to that portion — month after month, for the length of your contract.
ComEd Territory: Chicago and Northern Illinois
ComEd serves Chicago, Naperville, Aurora, Elgin, Joliet, Waukegan, and most of the Chicago metro area. Dozens of ARES providers compete for ComEd customers, making it one of the strongest competitive energy markets in Illinois. Both renters and homeowners with electricity in their name can shop and switch freely.
Ameren Illinois Territory: Central and Southern Illinois
Ameren Illinois serves Peoria, Springfield, Champaign-Urbana, Bloomington, and Decatur. The Ameren territory has a smaller pool of competing ARES suppliers than ComEd, but the opportunity to beat the utility default rate still exists — particularly for longer-term fixed plans from national suppliers like Constellation and Direct Energy.
Top Electricity Suppliers for Illinois in 2026
Constellation Energy
Constellation is one of the largest and most established ARES providers in Illinois, with availability in both ComEd and Ameren territories. They offer 6, 12, and 24-month fixed-rate plans, renewable energy options, and combined electricity and gas supply. Constellation is an ideal choice for Illinois residents who want a nationally recognized supplier with transparent pricing.
Direct Energy
Direct Energy competes actively in the ComEd territory and frequently offers some of the lowest fixed rates available in the Chicago deregulated energy market. Their 12-month plans are popular with Illinois households. Always verify that the advertised rate applies for the full contract term before signing up.
Homefield Energy
Homefield Energy is an Illinois-based ARES with a focus on residential customers in ComEd territory. Their local presence gives them strong knowledge of the Illinois electricity market, and their customer service reputation is consistently excellent. Fixed-rate and green energy plans are available.
Verde Energy
Verde Energy specializes in 100% renewable electricity and is available in Illinois ComEd territory. For Chicago-area residents who want green energy at competitive rates, Verde is one of the better-priced renewable options in the state. Illinois has strong clean energy goals, and renewable ARES plans are growing in popularity across the Chicago market.
Illinois Natural Gas Deregulation: Also Worth Shopping
Illinois natural gas supply is also deregulated. Nicor Gas serves northern Illinois, and Peoples Gas serves the City of Chicago. Both territories are open to competitive gas suppliers. Given Illinois cold winters, natural gas is a major household expense. Locking in a fixed gas supply rate before heating season is one of the highest-value moves available to Illinois energy customers. Constellation, XOOM Energy, and Spark Energy all offer competitive gas supply plans for Illinois households.
Internet Providers in Illinois: Compare by City
While you are shopping your deregulated energy Illinois electricity supplier, it is worth comparing your internet provider too. The Chicago metro has one of the most competitive internet markets in the Midwest.
Chicago and Northern Illinois Internet Options
Xfinity (Comcast) is the dominant cable provider across the Chicago metro. AT&T Fiber has been expanding aggressively in Chicago neighborhoods like Wicker Park, Logan Square, Lincoln Park, and Lakeview, as well as many northern suburbs. Astound Broadband (formerly RCN) offers competitive pricing in select Chicago neighborhoods, often undercutting Xfinity on post-promo rates. T-Mobile Home Internet provides a flat-rate, no-contract 5G option that has grown significantly across the Chicago metro area.
Central and Southern Illinois Internet Options
In Ameren territory, Spectrum serves parts of central Illinois, while T-Mobile Home Internet is often the best no-contract alternative in smaller communities. Starlink is the top option for rural downstate Illinois where cable and fiber coverage is unavailable.
Home Security in Illinois: Vivint, ADT, and More
Vivint operates across Illinois, including Chicago and suburbs, offering professional smart home packages with cameras, smart locks, smart thermostats, and 24/7 professional monitoring. The Vivint smart thermostat is particularly useful in Illinois: paired with a competitive fixed-rate electricity plan and a locked-in gas rate, it actively reduces consumption on both energy sources — compounding your savings year-round. ADT also provides home security monitoring throughout Illinois. For DIY options, Ring and SimpliSafe offer self-monitored security without long-term contracts.
How to Switch Electricity Suppliers in Illinois
- Confirm your utility territory — Check your bill to see if you are a ComEd or Ameren Illinois customer.
- Find your current supply rate — Look for the supply or generation charge per kWh on your bill.
- Compare licensed ARES offers — Use a marketplace like Utility Search Marketplace to see current fixed rates from licensed Illinois suppliers side by side.
- Review the contract carefully — Confirm the rate, term length, early termination fee, and that the rate is not introductory pricing that changes after a few months.
- Enroll online — You will need your utility account number. Most enrollments take under 10 minutes.
- No service interruption — Your utility handles the switch automatically. Electricity continues flowing without any disruption during or after the switch.
Illinois Bundle Savings Estimate
- ⚡ Electricity (ARES switch): Beat the ComEd or Ameren default — save $10–$20/month ($120–$240/year)
- 🔥 Natural gas (competitive supplier): Lock in a fixed Nicor or Peoples Gas supply rate before winter — save $15–$30/month in heating season
- 🌐 Internet: Switch from an expired Xfinity promo to AT&T Fiber or Astound — save $20–$40/month ($240–$480/year)
- 🔐 Home security: Compare Vivint vs ADT vs DIY options — save $10–$25/month
Total potential annual savings for an Illinois household actively shopping all four services: $400–$900+
Frequently Asked Questions About Illinois Deregulated Energy
Can renters switch electricity suppliers in Illinois?
Yes. If the electricity bill is in your name, you can choose your own ARES supplier regardless of whether you rent or own your home. If electricity is included in your rent, the landlord controls the account and you would need to discuss it with them.
Is there a fee to switch electricity suppliers in Illinois?
No. Switching from your utility default rate to a competitive ARES supplier costs nothing upfront. Some ARES contracts carry an early termination fee if you cancel mid-contract, so always read the ETF terms before enrolling. Switching between suppliers when your contract ends is always free.
How long does switching electricity suppliers take in Illinois?
The enrollment process takes under 10 minutes online. The actual switch processes through ComEd or Ameren within 1–2 billing cycles. During this time your electricity continues uninterrupted — only the supply charge line on your bill changes.
What is the best time to shop for electricity in Illinois?
Spring (March through May) is generally the best time to lock in a new fixed-rate plan in Illinois. Wholesale energy prices are typically lowest during mild weather months before summer cooling demand drives rates higher. Shopping in spring gives you the best chance of locking in a below-average rate for the year ahead.
Related Illinois Energy and Internet Guides
📖 Best Electricity Plans in Illinois 2026: Chicago and Suburbs Guide
📖 Internet Choice in Deregulated Energy States: Complete 2026 Bundling Guide