Central Maine Power Co. electricity rates
Investor-owned utility · Maine · NPCC region · ISONE
Central Maine Power Co. is a for-profit, investor-owned utility regulated by the state utility commission, serving 537,632 homes in Maine. Its residential customers pay an average of 28.81¢/kWh including fixed and delivery charges, 60% more than the U.S. average.
Rate basis: EIA-861M monthly utility data, 12 months ending 2026-07.
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Central Maine Power Co. bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $144.05 | $155.23 |
| 1,000 kWh | $288.10 | $287.07 |
| 1,500 kWh | $432.15 | $418.91 |
| 2,000 kWh | $576.20 | $550.75 |
*A Residential Standard Offer Service (Bundled) (effective 2026-01-01, $30.21/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.
Central Maine Power Co. residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| A Residential Standard Offer Service (Bundled) | 2026-01-01 | $30.21 | 12.72¢ first 50 kWh, 26.37¢ after |
| A-TOU Residential Service - Time-of-Usetime-of-use | 2026-01-01 | $26.71 | 50.3¢ (5pm–9pm) · 6.7¢ (12am–5pm, 9pm–12am) — summer weekdays |
| A-TOU Residential Service Time-of-Usetime-of-use | 2026-01-01 | $26.71 | 63.0¢ (5pm–9pm) · 19.5¢ (12am–5pm, 9pm–12am) — summer weekdays |
| A-TOU-OPTS Residential Service - Optional Time-Of-Use (Super Saver)time-of-use | 2022-07-01 | $13.44 | 23.0¢ (7am–12pm, 4pm–8pm) · 3.8¢ (12am–7am, 12pm–4pm, 8pm–12am) — summer weekdays |
| A-TOU-OPTS Residential Service - Optional Time-Of-Use (Super Saver)time-of-use | 2022-07-01 | $13.44 | 34.9¢ (7am–12pm, 4pm–8pm) · 15.7¢ (12am–7am, 12pm–4pm, 8pm–12am) — summer weekdays |
| R-TOU Retired Employee Residential Service - Time-Of-Usetime-of-use | 2018-01-01 | $10.00 | 7.4¢ (7am–12pm, 4pm–8pm) · 7.4¢ (12pm–4pm) · 3.5¢ (12am–7am, 8pm–12am) — summer weekdays |
| R-TOU Retired Employee Residential Service - Time-Of-Usetime-of-use | 2018-01-01 | $10.00 | 15.3¢ (7am–12pm, 4pm–8pm) · 15.3¢ (12pm–4pm) · 11.4¢ (12am–7am, 8pm–12am) — summer weekdays |
| A Residential Standard Offer Service | 2026-01-01 | $30.21 | 0.00¢ first 50 kWh, 13.65¢ after |
| R Retired Employee Residential Service Bundled Standard Offer | 2018-01-01 | $10.68 | 7.92¢ first 50 kWh, 12.60¢ after |
| R Retired Employee Residential Service Standard Offer | 2018-01-01 | $10.68 | 0.00¢ first 50 kWh, 4.68¢ after |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Central Maine Power Co. rate history
2015–2025: +88% change in the average residential rate (14.61¢ → 27.41¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Central Maine Power Co. | Maine avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 318 | 363 | 266 |
| Outages per customer (SAIFI) | 2.11 | 2.24 | 1.34 |
| Average restoration time (CAIDI) | 2 hr 31 min | — | — |
| Outage minutes excluding major storms | 177 | 192 | 121 |
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 Central Maine Power Co.'s counties, customers averaged 6 hr 24 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Hancock | 1,087 | 85 | 16,780 | 2025-11-26 |
| Piscataquis | 969 | 100 | 4,171 | 2025-12-20 |
| Lincoln | 919 | 106 | 7,307 | 2025-12-20 |
| Knox | 799 | 75 | 16,222 | 2025-12-26 |
| Sagadahoc | 772 | 55 | 9,221 | 2025-12-24 |
| Waldo | 575 | 63 | 6,361 | 2025-06-20 |
| Penobscot | 522 | 91 | 16,598 | 2025-12-20 |
| Somerset | 519 | 95 | 4,245 | 2025-08-19 |
| Franklin | 461 | 77 | 4,453 | 2025-12-20 |
| Oxford | 450 | 97 | 6,434 | 2025-10-07 |
| York | 360 | 83 | 12,037 | 2025-03-07 |
| Cumberland | 206 | 63 | 13,122 | 2025-12-19 |
| Kennebec | 166 | 50 | 8,775 | 2025-12-20 |
| Androscoggin | 150 | 45 | 6,435 | 2025-07-24 |
Central Maine Power Co. service area
Central Maine Power Co. serves 14 counties in Maine and 349 ZIP codes.
Androscoggin, Cumberland, Franklin, Hancock, Kennebec, Knox, Lincoln, Oxford, Penobscot, Piscataquis, Sagadahoc, Somerset, Waldo, York
Cities: Portland, Lewiston, Bangor, West Scarborough, South Portland, South Portland Gardens, Auburn, Biddeford, Sanford, Saco, Augusta, Westbrook, Waterville, Brunswick, York Beach, Wells Beach Station, Lisbon, North Bath, Old Orchard Beach, Bath, Buxton, Ellsworth, Winslow, Waterboro, South Berwick, Rockland, Gorham, Belfast, Eliot, Skowhegan, Topsham, Yarmouth, Gardiner, Turner, Lebanon, New Gloucester, Poland, Harpswell Center, Kennebunk, Paris
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Time-based rate programs | Time-of-use rates |
| Homes on time-based rates | 9,989 |
| Net-metered solar homes | 16,559 |
Central Maine Power Co. at a glance
| Ownership | Investor-owned utility |
| Services | Transmission, Distribution |
| Commercial rate | 25.07¢/kWh |
| Industrial rate | 23.61¢/kWh |
| Retail revenue (2025) | $1,218,496,900 |
| Electricity sold (2025) | 4,601,658 MWh |
| Peak demand | 1,720 MW summer · 1,584 MW winter |
| Balancing authority | ISNE |
| EIA utility ID | 3266 |
Other utilities in Maine
Frequently asked questions
What is Central Maine Power Co.'s electricity rate?
Central Maine Power Co. residential customers pay an average of 28.81¢ per kWh, all charges included (EIA-861M monthly utility data, 12 months ending 2026-07). That's 2% below the Maine average of 29.31¢ and 60% above the U.S. average.
What is the average Central Maine Power Co. electric bill?
About $155 a month. The average Central Maine Power Co. home uses 538 kWh a month. At 1,000 kWh the bill would be about $288.
How many customers does Central Maine Power Co. have?
Central Maine Power Co. serves 537,632 residential customers and 664,975 customers in total in Maine, across 14 counties.
How reliable is Central Maine Power Co.?
In 2025, the average Central Maine Power Co. customer was without power for 5 hr 18 min (SAIDI) over 2.11 interruptions (SAIFI), including major storms. Excluding major event days it was 2 hr 57 min. The Maine average was 6 hr 3 min and the U.S. average 4 hr 26 min.
Does Central Maine Power Co. offer time-of-use rates?
Yes. The OpenEI rate database lists 6 time-of-use residential plans, including A-TOU Residential Service - Time-of-Use. Running big appliances off-peak can cut their cost. Pick the plan in the calculator above to see by how much.
Does Central Maine Power Co. offer net metering for solar?
Central Maine Power Co. had 16,559 residential net-metered customers in 2025 with 139.5 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 Central Maine Power Co. before making decisions.