Central Maine Power Co Electricity Rates and Average Bill (Maine)
Data through July 2026 (the latest month EIA has published) · Updated October 13, 2026
As of July 2026, Central Maine Power Co's residential customers in Maine paid an average effective rate of 32.51¢/kWh with an average monthly bill of $137.64, per EIA Form 861-M data. That rate is 0.1¢ above the Maine average of 32.41¢/kWh; the U.S. average is 18.31¢/kWh.
Rate trend vs the Maine average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| 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 |
| July 2026 | 32.51 | 137.64 | 423 |
Central Maine Power Co vs Maine vs the U.S.
| Central Maine Power Co | Maine | U.S. average | |
|---|---|---|---|
| Rate (July 2026) | 32.51¢/kWh | 32.41¢/kWh | 18.31¢/kWh |
| Average monthly bill | $137.64 | $142.80 | $212.44 |
| Average monthly usage | 423 kWh | 441 kWh | 1160 kWh |
| Rate change, 1 year | +18.6% | +15.8% | +4.9% |
Estimate a bill at Central Maine Power Co rates
Worked example: 1,000 kWh at Central Maine Power Co's average effective rate of 32.51¢/kWh is about $325.10. The utility's actual average usage is 423 kWh/month, which produces the $137.64 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.