Central Maine Power Co Electricity Rates and Average Bill (Maine)
Data through June 2026 (the latest month EIA has published) · Updated September 04, 2026
As of June 2026, Central Maine Power Co's residential customers in Maine paid an average effective rate of 28.29¢/kWh with an average monthly bill of $128.31, per EIA Form 861-M data. That rate is 1.3¢ below the Maine average of 29.59¢/kWh; the U.S. average is 18.34¢/kWh.
Rate trend vs the Maine average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| July 2025 | 27.41 | 138.32 | 505 |
| August 2025 | 27.88 | 156.37 | 561 |
| September 2025 | 27.10 | 132.52 | 489 |
| October 2025 | 25.61 | 123.13 | 481 |
| November 2025 | 27.88 | 154.10 | 553 |
| December 2025 | 31.24 | 154.67 | 495 |
| January 2026 | 31.08 | 176.21 | 567 |
| February 2026 | 32.17 | 209.65 | 652 |
| March 2026 | 27.40 | 193.19 | 705 |
| April 2026 | 27.36 | 165.65 | 605 |
| May 2026 | 27.46 | 146.47 | 533 |
| June 2026 | 28.29 | 128.31 | 453 |
Central Maine Power Co vs Maine vs the U.S.
| Central Maine Power Co | Maine | U.S. average | |
|---|---|---|---|
| Rate (June 2026) | 28.29¢/kWh | 29.59¢/kWh | 18.34¢/kWh |
| Average monthly bill | $128.31 | $131.41 | $170.65 |
| Average monthly usage | 453 kWh | 444 kWh | 930 kWh |
| Rate change, 1 year | +3.4% | +5.2% | +5.0% |
Estimate a bill at Central Maine Power Co rates
Worked example: 1,000 kWh at Central Maine Power Co's average effective rate of 28.29¢/kWh is about $282.90. The utility's actual average usage is 453 kWh/month, which produces the $128.31 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Maine 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.