The IESO offers services, information and analysis to support Ontario's diverse electricity system. A central hub connecting its many stakeholders, the IESO reliably operates the system in real time, while ensuring its extensive planning, conservation, market and procurement capabilities serve the province's long-term needs.
Every five minutes, the IESO forecasts the demand for electricity and ensures sufficient supply to meet that demand. It does this through the wholesale market where the price of electricity is set.
The IESO works with a broad range of industry partners and stakeholders across the province to plan the electricity system for the long term, and secure clean electricity resources.
Working with our partners, the IESO guides the province's electricity conservation efforts by supporting programs that foster a culture of conservation, build market capability and promote innovation.
Save on Energy programs
Ontario Planning Outlook provides planning context for the public, policy makers and industry stakeholders and serves as an early input into the Ministry of Energy’s LTEP consultation process. It includes a 10-year review and a 20-year outlook for Ontario’s electricity system.
Current Hour's Demand
Hourly Output by Fuel Type
Installed capacity of wind and solar generation connected to local distribution systems.
as of March 31, 2016
Current Hourly Price
Hourly Ontario Energy Price ($/MWh)
The IESO ensures there is enough power to meet the province’s real-time energy needs while also planning and securing energy for the future.
About the IESO
Board of Directors
Stakeholder and community engagement is integral to the IESO’s decision-making process – providing individuals and organizations opportunities to provide input about proposed changes that affect them.
IESO Engagement Initiatives
Community Engagement on Regional Planning
Stakeholder Advisory Committee