Commonwealth Edison provides electricity service to Joliet and the surrounding Illinois area. The local climate significantly impacts energy costs throughout the year.
14.16¢/kWh
Average residential rate
The average Joliet residential customer pays approximately 14.16¢ per kilowatt-hour.
| Plan | Base Rate | Peak Hours | Best For |
|---|---|---|---|
| 6 Month Home Power Plan | 6.99 cents/kWh | N/A | Customers looking for a short-term fixed rate plan. |
| Price to Compare (PTC) | 6.47 cents/kWh | N/A | Customers who do not choose an alternative supplier. |
| Hourly Pricing | Varies hourly | Varies daily | Customers who can shift their electricity usage to off-peak hours. |
6 Month Home Power Plan: Customers looking for a short-term fixed rate plan.
Price to Compare (PTC): Customers who do not choose an alternative supplier.
Hourly Pricing: Customers who can shift their electricity usage to off-peak hours.
Joliet rates are approximately 1.7¢/kWh higher than in Chicago (12.5¢/kWh), which may be due to local infrastructure costs and demand patterns.
*Rates shown are approximate and subject to change. Verify current rates at https://www.comed.com.*
Joliet has a humid continental climate with long, warm, humid, and wet summers, and freezing, snowy, and windy winters.
| Season | Typical Bill Range | Primary Driver |
|---|---|---|
| Summer (Jun-Aug) | $100-$150 | Air conditioning |
| Winter (Dec-Feb) | $50-$60 | Heating |
| Spring/Fall | $70-$90 | Baseline usage |
Summer bills in Joliet can reach $150, while residents in Chicago typically see summer peaks around $300.
*Bill estimates based on average Joliet household usage of 800 kWh/month.*
Commonwealth Edison rates in Joliet have changed over the past several years:
The ComEd supply rate increased in June 2025 due to a spike in wholesale electricity costs and supply charges.
Time-of-use rates are expected to be implemented in 2026, and the transmission services charge will change in June 2026.
Serves Joliet and surrounding areas.
Common questions about Commonwealth Edison service in Joliet, Illinois — including current rates, billing, outage reporting, and how to verify your bill is accurate.
No upload required. Enter two numbers from your bill to see if it falls within typical ranges.
Most utility bills are calculated correctly.
This quick check helps you understand if your bill stands out from typical ranges. It cannot determine accuracy without a full bill review.
The "Total Amount Due" on your bill
Usually labeled "Total kWh" or "Usage"
Disclaimer: This tool provides a rough estimate based on typical residential rates. It does not account for fixed charges, demand charges, time-of-use pricing, taxes, fees, or other bill components. Results are for informational purposes only and should not be considered financial or legal advice. We cannot determine billing accuracy without reviewing your full bill.
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