Reliable Service and Stable Prices

The Maine Public Utilities Commission (MPUC) has approved an annual adjustment of CMP electric delivery prices effective July 1, 2020. Most of the price adjustment is related to extraordinary costs associated with major storms including the October 2019 Nor’easter, when 230,000 customers lost power, and a subsequent November 2019 storm which caused 180,000 outages. Rather than collecting these costs all at once, CMP proposed, and the MPUC agreed, to extend the period for collecting the costs associated with storm recovery over three years instead of one year to alleviate immediate impacts on customers during the current economic crisis. The price change also includes costs related to an increase in funding for energy efficiency programs, changes in federally mandated transmission costs and several accounting and tax adjustments.

The average residential customer will see a price increase of 2.8% on their total bill. The average small business customer will see a price increase of 0.6% on their total monthly bill. Specific pricing information can be found below.

More Information 

To learn more about a particular rate, download a PDF description of its availability and charges.

 Rate (Rate Code)


  Rate Tariff Index
A  Residential Service
AL Area Lighting Service
A-LM  Residential Load Management Service


Residential Service - Time-Of-Use
A-TOU-OPTS  Residential Service - Optional Time-Of-Use
Optional Targeted Service Rate: B-DCFC General Service - Electric Vehicle Direct Current Fast Charger
Optional Targeted Service Rider: B-SVA General Svc - Steady Volume Advantage
GS-DF General Service - Dual Feed
IGS-P-TOU Intermediate General Service Primary Time-of-Use
IGS-S-TOU  Intermediate General Service Secondary Time-of-Use
LGS-P-TOU Large General Service - Primary Time-of-Use
LGS-S-TOU  Large General Service - Secondary Time-of-Use
LGS-ST-TOU Large General Service - Subtransmission Time-of-Use
LGS-T-TOU Large General Service - Transmission Time-of-Use
MGS-P  Medium General Service - Primary
MGS-P-TOU Medium General Service - Primary - Time-of-Use
MGS-S  Medium General Service - Secondary
MGS-S-TOU  Medium General Service - Secondary Time-of-Use
MMI  Optional Targeted Service: Maine-Made Incentive General Service - Economic Development Rider
O  Temporary Power Rate
PTZ  Optional Targeted Service:
Pine Tree Development Zone (PTZ) General Service Economic Development Rider
R  Retired Employee Residential Service
R-TOU  Retired Employee Residential Service Time-of-Use
SB Standby Service
SGS  Small General Service
SGS-TOU  Small General Service Time-of-Use
SL  Street Lighting Service
W-1 (cancelled) Wholesale Service (cancelled)

Pricing FAQs 


  • Can I pay the same amount each month?  
  • Can I enroll in AutoPay Service?  
  • What options do I have to pay my bill?  
  • What options do I have to purchase my electricity supply?