Average Electric Bill in Illinois (2026)

Illinois Electricity Cost Comparison

Electricity Rates in Illinois Are Rising

Electricity rates across the United States have been increasing at an average of 2.5% per year, and Illinois is no exception. At the current rate of 17.69¢/kWh, your average monthly bill of $157 could grow to $178/month within 5 years and $201/month within 10 years — that's an increase of $44/month without changing your usage habits at all.

Solar energy effectively locks in your electricity cost at today's prices. Once your system is installed and paid off, the electricity it produces is free for the remaining lifespan of the panels (25-30+ years). This hedge against rising rates is one of the most compelling financial arguments for going solar, especially in states like Illinois where rates are at or above the national average.

Illinois homeowners with solar typically reduce their electricity bills by 70-100%, saving approximately $1601 per year. Over the 25-year lifespan of a solar system, total savings in Illinois typically range from $$32,020 to $$48,030 when factoring in rate increases.

How Solar Reduces Your Illinois Electric Bill

When you install solar panels, they generate electricity during daylight hours that directly powers your home. Any excess electricity is typically sent back to the grid through net metering, earning you credits on your utility bill. Illinois offers full retail net metering, meaning you receive full credit for every excess kWh — this maximizes your savings.

With 4.2 peak sun hours per day in Illinois, a properly sized 8kW solar system produces approximately 12,264 kWh per year — enough to offset most or all of an average Illinois household's electricity consumption.

The best way to determine exactly how much solar can save on your specific Illinois electric bill is to get a personalized quote from a licensed installer. They'll analyze your actual usage data, roof conditions, and local utility policies to provide an accurate savings projection.