Connecting Today.
Powering Tomorrow.
The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system. The IESO delivers key services across the electricity sector including: managing the power system in real-time, planning for the province's future energy needs, enabling conservation and designing a more efficient electricity marketplace to support sector evolution.
Electricity Planning for Toronto
Electricity demand in the city of Toronto is rising quickly. The IESO is in a new round of electricity planning to identify actions needed to ensure a reliable supply of electricity to the city for years to come. See our recent presentation or find information and resources in the Toronto Regional Plan Information Package.
2026 APO Demand Forecast
The IESO’s 2026 demand forecast projects significant increases in electricity demand throughout Ontario in the coming decades. It underscores the urgent need for investments in new electricity infrastructure to keep the system reliable, affordable and sustainable, and positioned to catalyze economic development in every corner of Ontario. See details of the forecast.
Stakeholder Engagement Meetings
The agenda for the December 16 and 18 stakeholder engagement meetings is now available.
Meeting materials and recorded presentations for the November stakeholder engagement meetings are also posted.
News and Updates:
- IESO Secures Resources via 2025 Capacity Auction December 04, 2025
- Transmission Rights Clearing Account Disbursement December 04, 2025
Upcoming Events:
- Adjustments to Real-Time Make-Whole Payments webinar December 16, 2025
- Updates to IESO Monitoring Requirements: Phasor Data webinar December 18, 2025