Connecting Today.
Powering Tomorrow.
The Independent Electricity System Operator (IESO) works at the heart of Ontario’s electricity system, managing the grid in real time, planning for future energy needs, and delivering energy efficiency programs to ensure a reliable electricity system that supports economic growth and a changing energy future.
New Transmission Recommendations
In response to rising demand and evolving reliability needs, the IESO has developed three plans that outline recommendations for a phased approach to new and reinforced transmission infrastructure across Ontario. Learn more: North of Sudbury Bulk Plan | Eastern Ontario Bulk Plan | South and Central Bulk Plan
Industrial Energy Efficiency
A recently released third-party study has found that the IESO’s energy-efficiency programs have a positive impact on industrial productivity. For every dollar provided through incentives, $5.80 is invested into energy-efficiency spending in the form of capital deployment and reinvestment of energy savings. Learn more.
Stakeholder Engagement Meetings
The agenda for the October 14-16 stakeholder engagement meetings is now available.
Meeting materials and recorded presentations for the September stakeholder engagement meetings are also posted.
News and Updates:
- IESO Wins ENERGY STAR 2026® Utility of the Year Award October 13, 2026
- New Price Bias Adjustment Factors Posted for Period between December 2026 to May 2027 October 13, 2026
Upcoming Events:
- Stakeholder Engagement Meetings-October 14-16 October 14, 2026
- Technical Panel Meeting October 14, 2026