Average Electric Bill in Illinois

We dug into the U.S. Energy Information Administration’s data[1] to look at the average monthly electric bill for Illinois residential households. These averages are for the full year of 2018, not any specific month of 2019, given that electricity usage & prices fluctuate month-to-month.

average monthly residential electric bill in Illinois
*This is 19.3% less than the United States national average, which is $117.65.
average residential electric rate for households in IL
*This is 0.8% less than the United States average, which is 12.87¢/kWh.
744 kWh
average monthly residential electricity consumption in IL
*This is 18.5% greater than the national average (914 kWh) & the 17th lowest in the U.S..
Illinois ranking for lowest electric bill in the United States
*Relative to average monthly household income (1.86%), IL has the 6th highest bill.

Why Are Electric Bills in Illinois Comparatively Low?

The two factors that make up the cost an electric bill are (1) cost and (2) consumption. Looking at each, there’s not much to say when it comes to cost. With an average electric rate that’s only 0.8% less than the national average (12.77¢), the rates are only 10 cents cheaper. However, the average residential electricity consumption in Illinois is 18.5% lower than the national average (744%).

Reasons for Low Electricity Rates in Illinois

Even though electricity rates are only 0.8% less in Illinois than the national average, it’s important to understand what makes electricity more or less expensive. The factors affecting this number are:

  1. Supplyan increase in the supply of energy brings costs down. For example, weather events such as high amounts of rain or high wind speeds can temporarily increase the supply of energy where there are hydropower plants or wind turbines to take advantage, and as a result, lower electricity rates.
  2. Demand – an increase in the demand for energy causes costs to rise. This is because the use of more costly fuels, such as natural gas, help “fill in” for the rise in demand. For example, a heat wave might temporarily increase the demand for cooling and the subsequent need for fuels, and as a result, raise electricity rates.

Additional factors that impact electricity rates include state & federal regulations, global markets and even financial speculation.

Reasons for Low Electricity Consumption in Illinois

Given that electricity consumption in Illinois is much higher than the national average, it’s important to understand exactly what electricity is used for. The EIA looked at the end uses of electricity in the average American household and found the following breakdown:


“Other uses” includes small electric devices, heating elements, exterior lights, outdoor grills, pool and spa heaters, backup electricity generators, and motors not listed above. Does not include electric vehicle charging.

Tips for Lowering Electric Bill

  • Reduce space heating/cooling– given that heating & cooling make up a large part of the average electric bill, increasing energy efficiency in this area can have arguably the biggest impact on your bill. Here are some things you can do to reduce your usage in this area:
    • Use a programmable thermostat (can reduce heating/cooling by ~10%)
    • Use extra insulation
    • Dress up/down to the temperature
    • Replace your air filter more often
    • Check seals on windows/doors/appliances for openings/leaks
  • Reduce water heating – one of the next biggest portions of the average electric bill is from water heating, which can be reduced by showering at lower temperatures, taking shorter hot showers and by lowering the temperature on the water heater itself (ideally to 120 degrees Fahrenheit). 
  • Adjust fridge & freezer temperatures – ideally, your fridge should be at 38 degrees and your freezer at 5 degrees Fahrenheit.

Where Does Illinois Get Its Electricity From?

Illinois is the fifth-largest consumer of electricity, so it makes sense that it uses a variety of resources to source its electricity. Coal powers a decent chunk of the state, but clean energy has been growing in the state, with 12% of Illinois’ electricity generation coming from nuclear power.

Other sources of power in Illinois are ethanol, fuel oil, and other forms of renewable energy, such as biomass.

[1] Data from: https://www.eia.gov/electricity/data.php#sales 

Read About Electric Bills in Other States