Rate transparency information is posted in accordance with An Act To Provide Transparency in Electricity Pricing for Maine Ratepayers and the Commission’s Report on Transparency in Electricity Rates and Assessments. The purpose of the Act is to create increased transparency regarding the costs and effects of State energy policies on electricity rates. To put these costs in perspective and provide greater electric rate transparency, this reporting also itemizes costs associated with transmission, distribution, and supply.

A description of the benefits associated with each State energy policy is available below the charts.

Please note:

  • The rates presented represent average rates over all rate classes. 
  • Not all components apply to all rate classes.
  • Supply costs are inclusive of certain State energy policies, such as the Renewable Portfolio Standard and the Regional Greenhouse Gas Initiative.
  • Regional Greenhouse Gas Initiative costs reflect only the small class loads served by standard offer service.

CMP Cost Breakdown Table

CMP Cost Breakdown

Versant Cost Breakdown Table

Versant Cost Breakdown

MPD Cost Breakdown Table


MPD Cost Breakdown


Maine Public Utilities Commission Assessment: Provides funds for the operations of the Maine Public Utilities Commission, in addition to funds provided through assessments in other utility rates, including telephone, natural gas, and water utility rates. The Maine Public Utilities Commission regulates the rates and services of public utilities and oversees the competitive retail electricity market.

Office of the Public Advocate Assessment: Provides funds for the operations of the Office of the Public Advocate, in addition to funds provided through assessments in other utility rates, including telephone, natural gas, and water utility rates. The Office of the Public Advocate advocates on behalf of residential and small commercial ratepayers in Maine Public Utilities Commission, regional and federal proceedings.

Efficiency Maine Trust charge: The Efficiency Maine Trust (EMT) administers energy efficiency and conservation programs throughout the State for the purpose of lowering the costs of electricity for Maine’s residents and business. A portion of the Efficiency Maine Trust’s budget is funded by a charge included in electricity rates. The EMT website has information on available programs.

Low-income program costs: Maine statute provides for electricity bill discounts for low-income customers. The program is funded by a charge included in electricity rates. 

Renewable resource portfolio requirement costs: The renewable resource portfolio requirements in Maine and other New England states are designed to encourage renewable resource development and resource diversity in New England with the objective of promoting regional electricity cost stability and lower regional electricity costs as well as achieving environmental benefits. A 2011 MPUC report contains a discussion of the benefits and costs of the portfolio requirement: MPUC RPS Report 2011 - Review of RPS Requirements and Compliance in Maine

Regional Greenhouse Gas Initiative (RGGI) compliance costs: RGGI is a nine-state program to reduce greenhouse gas emissions from electricity generating power plants that serve New England, New York, Maryland, and Delaware. The costs of the program are paid directly by power plants that generate greenhouse gas emissions with Maine’s proceeds used for energy efficiency programs (RGGI website). 

Utility energy supply contract obligations: Electricity supply contracts are intended to facilitate the development of electric power generating plants and/or provide electric rate stability benefits. These contracts are also designed to provide benefits in the form of lower wholesale regional wholesale electricity costs and to encourage renewable energy development. This category includes both legacy stranded costs and post-restructuring long-term contracts costs/benefits.