Rates by state / Illinois / Green Mountain Energy Company
Retail Power Marketer · 6,670 residential customers
Green Mountain Energy Company electricity rates
Residential customers paid an average of 22.1¢ per kWh in 2025, 18% above the Illinois average of 18.8¢ for the latest 12 months.
Green Mountain Energy Company reports the energy (supply) part of the bill only. The rate above adds the Illinois average for the other part, so treat it as an estimate.
Average rate
22.1¢/kWh
2025, all residential revenue ÷ kWh
Average bill
$123/mo
At 558 kWh a month
1-year change
+7.1%
5 years: +23.0%
Average rate by year
202018.0¢
202118.9¢
202220.6¢
202320.4¢
202420.6¢
202522.1¢
Green Mountain Energy Company bill at different usage levels
Estimated monthly bill at Green Mountain Energy Company's 2025 average rate of 22.1¢ per kWh. Actual bills vary with your plan, fixed charges and taxes.
| Monthly use | Green Mountain Energy Company | Illinois average |
|---|---|---|
| 500 kWh (about average here) | $111 | $94 |
| 750 kWh | $166 | $141 |
| 1,000 kWh | $221 | $188 |
| 1,500 kWh | $332 | $282 |
| 2,000 kWh | $442 | $376 |
Other utilities in Illinois
| Utility | Customers | Rate |
|---|---|---|
| Commonwealth Edison Co | 3,753,924 | 17.7¢ |
| Ameren Illinois Company | 1,062,810 | 16.7¢ |
| MC Squared Energy Services, LLC | 263,681 | 17.0¢ |
| Homefield Energy | 147,108 | 19.5¢ |
| Reliant Energy Northeast LLC | 142,167 | 20.8¢ |
| Constellation NewEnergy, Inc | 125,423 | 18.3¢ |
| MidAmerican Energy Co | 73,481 | 10.0¢ |
| City of Springfield - (IL) | 59,366 | 13.1¢ |
Green Mountain Energy Company: common questions
- How much does Green Mountain Energy Company charge per kWh?
- Green Mountain Energy Company residential customers paid an average of 22.1¢ per kWh in 2025, counting all charges, according to EIA Form 861 data. This is an estimate: Green Mountain Energy Company reports only part of the bill, so the Illinois average for the other part is added.
- What is the average Green Mountain Energy Company electric bill?
- The average Green Mountain Energy Company household used 558 kWh a month in 2025, which works out to about $123 a month at the average rate.
- Is Green Mountain Energy Company cheaper than other utilities in Illinois?
- Green Mountain Energy Company's average rate is 18% above the Illinois average of 18.8¢. 55 of 77 utilities in Illinois have a lower average rate.
- Did Green Mountain Energy Company raise rates?
- Green Mountain Energy Company's average residential rate changed +7.1% from 2024 to 2025 and +23.0% since 2020.
- Is my Green Mountain Energy Company bill too high?
- Enter the kWh and amount from your bill in the free bill check on AverageElectricBill.com. It compares your use with similar Illinois homes and your rate with Green Mountain Energy Company's average.
Got a Green Mountain Energy Company bill?
Check my billSource: U.S. EIA Form EIA-861, 2025 final data.