City of Naperville electricity rates
Municipal utility · Illinois · RFC region · PJM
City of Naperville is a city-owned municipal utility, governed locally rather than by the state commission, serving 57,225 homes in Illinois. Its residential customers pay an average of 15.51¢/kWh including fixed and delivery charges, 14% less than the U.S. average.
Rate basis: EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend.
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City of Naperville bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $77.55 | $69.14 |
| 1,000 kWh | $155.10 | $122.27 |
| 1,500 kWh | $232.65 | $175.41 |
| 2,000 kWh | $310.20 | $228.54 |
*Residential (effective 2022-05-01, $16.00/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
City of Naperville residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Residential | 2022-05-01 | $16.00 | 10.63¢ |
| Residential Forward Energy | 2014-05-01 | $11.10 | 9.38¢ |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
City of Naperville rate history
2015–2025: +31% change in the average residential rate (11.17¢ → 14.61¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | City of Naperville | Illinois avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 20 | 148 | 266 |
| Outages per customer (SAIFI) | 0.27 | 0.87 | 1.34 |
| Average restoration time (CAIDI) | 75 min | — | — |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across City of Naperville's counties, customers averaged 119 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| DuPage | 128 | 11 | 20,530 | 2025-08-08 |
| Will | 110 | 13 | 14,999 | 2025-08-17 |
City of Naperville service area
City of Naperville serves 2 counties in Illinois and 3 ZIP codes.
DuPage, Will
Cities: Aurora, Naperville
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Customers with daily usage data online | 57,225 |
| Time-based rate programs | None reported |
| Net-metered solar homes | 1,252 |
| Residential efficiency incentives paid (2025) | $4,425 |
| Residential energy saved by programs | 197 MWh |
City of Naperville at a glance
| Ownership | Municipal utility |
| Services | Transmission, Distribution |
| Commercial rate | 12.09¢/kWh |
| Industrial rate | 14.69¢/kWh |
| Retail revenue (2025) | $159,643,800 |
| Electricity sold (2025) | 1,231,234 MWh |
| Peak demand | 320 MW summer · 206 MW winter |
| Line losses | 4.1% |
| Balancing authority | PJM |
| EIA utility ID | 13208 |
| Website | www.naperville.il.us/services/electric-utility/powering-our-community-for-the-future/energy-efficiency-grant-programs |
Other utilities in Illinois
Frequently asked questions
What is City of Naperville's electricity rate?
City of Naperville residential customers pay an average of 15.51¢ per kWh, all charges included (EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend). That's 17% below the Illinois average of 18.79¢ and 14% below the U.S. average.
What is the average City of Naperville electric bill?
About $119 a month. The average City of Naperville home uses 769 kWh a month. At 1,000 kWh the bill would be about $155.
How many customers does City of Naperville have?
City of Naperville serves 57,225 residential customers and 64,025 customers in total in Illinois, across 2 counties.
How reliable is City of Naperville?
In 2025, the average City of Naperville customer was without power for 20 min (SAIDI) over 0.27 interruptions (SAIFI), including major storms. The Illinois average was 2 hr 28 min and the U.S. average 4 hr 26 min.
Does City of Naperville offer net metering for solar?
City of Naperville had 1,252 residential net-metered customers in 2025 with 11.2 MW of capacity. Estimate solar savings at this utility's rate.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with City of Naperville before making decisions.