Commonwealth Edison Co Electricity Rates and Average Bill (Illinois)
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, Commonwealth Edison Co's residential customers in Illinois paid an average effective rate of 19.28¢/kWh with an average monthly bill of $143.96, per EIA Form 861-M data. That rate is in line with the Illinois average of 19.32¢/kWh; the U.S. average is 18.16¢/kWh.
Rate trend vs the Illinois average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 18.62 | 100.21 | 538 |
| October 2025 | 18.04 | 88.22 | 489 |
| November 2025 | 17.63 | 87.38 | 496 |
| December 2025 | 18.03 | 105.96 | 588 |
| January 2026 | 16.89 | 111.31 | 659 |
| February 2026 | 17.71 | 104.66 | 591 |
| March 2026 | 18.33 | 95.52 | 521 |
| April 2026 | 20.91 | 95.83 | 458 |
| May 2026 | 28.89 | 115.18 | 399 |
| June 2026 | 20.92 | 121.27 | 580 |
| July 2026 | 19.64 | 169.72 | 864 |
| August 2026 | 19.28 | 143.96 | 747 |
Commonwealth Edison Co vs Illinois vs the U.S.
| Commonwealth Edison Co | Illinois | U.S. average | |
|---|---|---|---|
| Rate (August 2026) | 19.28¢/kWh | 19.32¢/kWh | 18.16¢/kWh |
| Average monthly bill | $143.96 | $171.18 | $209.23 |
| Average monthly usage | 747 kWh | 886 kWh | 1152 kWh |
| Rate change, 1 year | +4.7% | +7.2% | +3.4% |
Estimate a bill at Commonwealth Edison Co rates
Worked example: 1,000 kWh at Commonwealth Edison Co's average effective rate of 19.28¢/kWh is about $192.80. The utility's actual average usage is 747 kWh/month, which produces the $143.96 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Illinois rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.