Required Notice of OEB Applications

The IESO's expenditure and revenue requirement, as well as the fees it charges, are regulated by the Ontario Energy Board (OEB), a provincial government agency. At any time, the IESO may be involved in proceedings before the OEB for applications which it has filed. The IESO may also be participating in proceedings for applications filed by others in which the IESO is an interested party.

OEB Applications filed by the IESO

2020 and 2021 Revenue Requirement Submissions

The IESO filed its 2020 and 2021 Revenue Requirement Submissions with the Ontario Energy Board on May 27, 2021. The submissions and other documents which form the record of the OEB’s proceeding are available on the OEB’s web site (Case Number EB-2020-0230). 

The IESO’s expenditures, revenue requirements and fees allow for the continuing collaboration with stakeholders to implement a competitive framework to address supply shortfalls emerging later this decade, and promote greater participation in the electricity markets. As the organization works to find new efficiencies and drive down costs, these and other investments will be critical to the IESO’s efforts to deliver value to Ontario’s electricity customers and ensure reliability over the long term. 

Learn more about the IESO’s priority initiatives and financial plans in its 2020-2022 Business Plan.

The Ontario Energy Board has issued its Notice of Hearing relating to the IESO’s 2020 and 2021 Revenue Requirement Submissions. See the Notice of Hearing (English) | (French).

If you are not able to access the documents through the links provided and would like a copy of the Notice or the IESO’s application, please email


For past applications filed by the IESO, see the OEB’s website.