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Organization & Participant Registration

Organizations must register if they intend to participate in the IESO-administered markets or programs, have a physical facility connecting to the IESO-controlled grid, or plan to have a physical facility that is a variable generator 5 MW or greater.

Organizations must also register if they intend to become a service provider such as a metering service provider.

For more information on IESO-administered markets and programs see Markets & Related Programs.


To Register An Organization

  • Complete this online form: Register An Organization
  • Submit two signed originals of the Participation Agreement upon request

To Register As A Market Participant

The IESO's Market Registration group will establish mandatory organization contacts and provide initial access to  Online IESO. The user with the Applicant Representative role will receive various tasks at the appropriate time via Online IESO to complete the Authorize Market Participant task, including, but not restricted to:

  • Paying the Market Registration application fee $1,130 ($1,000 + 13% HST)

  • Providing an Ontario Energy Board (OEB) licence

  • Providing a National Energy Permit (for Energy Trader - Exporter only)

  • Providing prudential support for those who plan to participate in the real-time IESO-administered markets

  • Providing details of a Canadian bank account

  • ​Providing an Emergency Preparedness Plan that describes how the organization will respond to emergencies affecting the supply or delivery of electricity. See Emergency Preparedness guidelines for assistance to develop emergency preparedness plans.

  • Establishing Participant contacts through Online IESO.

Note: Access by persons with specific roles is required in Online IESO to complete these tasks. See About Online IESO for details on the various roles.

Assistance is Available

Please contact the IESO at market.registration@ieso.ca  for assistance to complete required registration documentation.


Prudential Support is used to cover funds that might be owed to the market if the company were unable to make a payment. See the Guide to Prudentials and Chapter 2 of the Market Rules to learn more about prudential support.

To support organizations in meeting their prudential requirements, see the list of financial institutions eligible to provide support. The IESO's list of acceptable bond rating agencies is:

  • Standard & Poor's Corporation
  • Moody's Investor Service
  • Dominion Bond Rating Services

To Register As A Program Participant ​

The IESO manages programs relating to the energy market, operations and settlements.

Centralized Forecasting

All wind and solar generation facilities (variable generators) connecting to the IESO-controlled grid, or connecting to a distribution system with an installed capacity of 5 MW or greater, are required to register as both an Organization and as a Market Participant if connected to the IESO controlled grid; or a Program Participant if connected to the distribution system.

Market Registration will establish mandatory organization contacts and provide initial access to the Online IESO which will allow the applicant complete the remainder of the required  tasks.

A variable generator connecting to the IESO-controlled grid must also complete the Manage Facilities & Equipment task.

All variable generators greater than 5 MW must participate in the centralized forecasting service, which requires that meteorological and operational data are sent to us as outlined in the training guide.

A variable generator connecting to the distribution system must complete registration tasks prior to reaching commercial operation.

The Participant Technical Reference Manual outlines all the communication methods and protocols available for a variable generator to send data/information to the IESO.

For an explanation of the technical requirements and process necessary to register for the centralized forecasting program, see Training Guide.


Assistance is Available

Email market.registration@ieso.ca, for assistance to register as a program participant for Centralized Forecasting.