Reliability Assessment Forms Due April 1
March 6, 2026
Generators, electricity storage participants, and transmitters are obligated on an annual basis to provide information to enable the IESO to perform reliability assessments, via the forms outlined below:
Please ensure the applicable form is fully completed before submission.
The forms should be emailed to forecasts.assessments@ieso.ca no later than April 1, as per Market Manual 2: Market Administration, Part 2.8: Reliability Assessments Information Requirements. The information required is for the period from July 2026 to December 2036 (10 years and six months). Further information about submission timelines and links to the latest versions of the forms can be found on the Calendar for Submissions of Reliability Assessments Information.
Questions can be directed to customer.relations@ieso.ca.