Discover Affordable Illinois Electricity Rates

‍Illinois Electric & Gas Utilities

Due to Illinois' deregulated status, you have the choice to separate who delivers and supplies your energy. Utilities, like ComEd and Ameren, own the poles, wires, and pipes that deliver energy to your home. They are also responsible for handling outages and maintaining infrastructure. Although you can’t change your utility company, you can choose who supplies your energy. Plugin Illinois provides consumers with the opportunity to shop for energy suppliers, especially if you’re currently with any of the following utilities:

Illinois Utilities:

• Ameren Illinois

• ComEd

• MidAmerican Energy Company

• Nicor Gas

• North Shore Gas

• People's Gas

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Illinois Data Center News & Trends

Illinois has become one of the country's biggest data center markets, with 228 facilities currently and even more in the planning stages. Chicago and the surrounding suburbs host most of the activity, and the Joliet City Council recently approved a 795-acre facility that would be the state's largest center. But the rapid expansion is putting serious pressure on the energy grid. Data centers currently consume 5.43% of all Illinois electricity, and PJM's market monitor attributed roughly $9.3 billion in capacity cost increases to data center demand. Governor Pritzker has proposed a two-year suspension of data center tax incentives starting July 2026. The facilities already approved aren't going anywhere, but future development faces more complicated regulations.

Seasonal Energy Trends in Illinois

Spring

Milder temperatures across Illinois mean heating and cooling systems get a break, and Illinois energy rates tend to settle a bit. Spring usually doesn't leave much of a negative effect on the Illinois energy grid, keeping prices steady.

Summer

Illinois summer months can get very hot and humid. This can push air conditioning usage up across the state, and that extra demand usually shows up in higher Illinois electricity rates. Summer capacity charges from PJM and MISO tend to hit bills hardest between June and September.

Fall

As temperatures start to cool off, nights start getting cold enough that furnaces kick on earlier than you'd expect. Usage is generally moderate, though natural gas demand starts creeping up as we get closer to winter.

Winter

Illinois winters tend to be very harsh. Heating costs spike, especially for homes on natural gas, and electricity usage stays elevated, too. This leads to demand spikes and grid congestion across the state.

Navigating the Illinois Natural Gas Market

Illinois natural gas prices fluctuate with seasonal demand, and winter months tend to hit hardest. Nicor Gas, the state's largest gas utility, filed a $221 million rate hike request with the Illinois Commerce Commission in early 2026, just weeks after a previous $168 million increase was approved. People's Gas filed its own $202 million request around the same time. If approved, natural gas rates will increase for businesses and residents. For customers looking for more predictable bills, shopping for a plan through an alternative supplier can help avoid volatility and rate hikes.

What Is Illinois' Deregulation Status?

Illinois deregulated its electricity market in 1997 when legislators passed the Electric Service Customer Choice and Rate Relief Law. At first, only large commercial customers could choose an alternative supplier. Residential customers had to wait until 2002 before they got the same opportunity, though the state did cut electric rates by 20% and freeze them for a decade as a stopgap. By 2007, those rate caps expired; prices jumped significantly, and more residents started shopping around. Today, both electricity and natural gas are deregulated for residential and commercial customers across ComEd, Ameren, and MidAmerican Energy territories.