Illinois Electricity Rates and Average Bill
Data through June 2026 (the latest month EIA has published) · Updated September 04, 2026
As of June 2026, the average residential electricity rate in Illinois is 19.89¢/kWh (the 16th-highest in the U.S.) and the average monthly bill is $142.84, per EIA data. That rate is 1.6¢ above the U.S. average of 18.34¢/kWh.
Rate trend, last three years
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| July 2025 | 17.22 | 184.49 | 1072 |
| August 2025 | 18.06 | 163.36 | 905 |
| September 2025 | 19.05 | 125.23 | 657 |
| October 2025 | 18.74 | 107.98 | 576 |
| November 2025 | 18.31 | 105.46 | 576 |
| December 2025 | 17.07 | 131.23 | 769 |
| January 2026 | 16.36 | 132.88 | 812 |
| February 2026 | 17.83 | 128.25 | 719 |
| March 2026 | 18.86 | 115.24 | 611 |
| April 2026 | 20.47 | 110.07 | 538 |
| May 2026 | 23.85 | 122.65 | 514 |
| June 2026 | 19.89 | 142.84 | 718 |
Illinois vs the U.S. average
| Illinois | U.S. average | |
|---|---|---|
| Rate (June 2026) | 19.89¢/kWh | 18.34¢/kWh |
| Average monthly bill | $142.84 | $170.65 |
| Average monthly usage | 718 kWh | 930 kWh |
| Rate change, 1 year | +8.7% | +5.0% |
| Rate change, 5 years | +55.0% | +32.6% |
Illinois's average residential rate of 19.89¢/kWh for June 2026 ranks 36th of 51 (1 = lowest). Over the past year the rate moved +8.7% (Illinois) versus +5.0% nationally; over five years, +55.0% versus +32.6% nationally. Average usage of 718 kWh/month compares with 930 kWh nationally, which is why the bill and rate ranks can differ. For how Illinois's recent increase ranks against every other state (12-month, 3-year and 5-year changes), see electricity rate increases by state.
Largest utilities in Illinois
Average effective rates and bills for Illinois's largest utilities, from EIA Form 861-M (June 2026). Or find yours by ZIP code.
| Utility | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) | Residential customers |
|---|---|---|---|---|
| Commonwealth Edison Co | 20.92 | 121.27 | 580 | 3,047,638 |
| Ameren Illinois Company | 18.36 | 169.52 | 923 | 640,117 |
| MidAmerican Energy Co | 10.71 | 91.65 | 856 | 73,394 |
Average bill = rate × average usage. Utilities with similar rates can show very different average bills because their customers' average usage differs (housing mix, heating fuel, climate).
Estimate a bill at Illinois rates
Worked example: 1,000 kWh at Illinois's average rate of 19.89¢/kWh is about $198.90. The state's actual average usage is 718 kWh/month, which is what produces the $142.84 average bill. These are average effective rates including all charges; your utility's tariff will differ.
Wondering what's behind rising rates nationally? See Why is my electric bill so high?, our data-led explainer on demand growth, data centers, and grid costs. Also: Illinois gas prices and why they are what they are, and the cheapest way to heat a home by fuel and state.
Source: EIA retail sales data (residential sector, monthly), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. We do not project unpublished months. See methodology.