Illinois · Municipal
City of Naperville - (IL)
14.61¢ per kWh, bundled, EIA-861 2025. Average bill $112.32 at 769.0 kWh a month, across 57,225 customers on that row.
Illinois averaged 17.67¢/kWh and $126.59 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 57,225, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$146.10
14.61¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 11.17¢ | $89.84 | 804.1 | 52,627 |
| 2016 | 12.21¢ | $103.02 | 843.6 | 52,824 |
| 2017 | 13.05¢ | $102.96 | 789.2 | 53,060 |
| 2018 | 13.55¢ | $112.05 | 826.6 | 53,274 |
| 2019 | 13.21¢ | $101.62 | 769.5 | 54,231 |
| 2020 | 13.42¢ | $107.81 | 803.6 | 54,483 |
| 2021 | 13.08¢ | $106.87 | 816.8 | 54,868 |
| 2022 | 13.01¢ | $101.40 | 779.2 | 55,329 |
| 2023 | 12.95¢ | $97.19 | 750.3 | 55,563 |
| 2024 | 12.98¢ | $98.85 | 761.7 | 56,117 |
| 2025 | 14.61¢ | $112.32 | 769.0 | 57,225 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
DuPage, Will.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool