Market participants, energy developers and contract holders will find the information they need to interact with the IESO and its markets and programs
IESO Invites Comments on Exemptions to the Market Rules July 03, 2025
Active Stakeholder Engagements - Deadlines for Comments July 03, 2025
ERP Storage and Co-located Hybrid Integration Project webinar July 24, 2025
Additional Regulation Service Procurement webinar July 24, 2025
Advisories and Notifications
Stay informed with advisories and notifications, subscribe to available RSS feeds
Calendars
Events, settlement and payment schedules, as well as market participant deadlines
Change Management
Changes to market rules, processes and IT systems are managed through a defined baseline and IT release process
Connecting to Ontario's Power System
Comprehensive step-by-step guide through the process to connect to Ontario's electricity system.
Energy Efficiency
Investments in energy efficiency play a key role in the reliability of the electricity system.
Resource Acquisition and Contracts
Procurement opportunities for energy resources, as well as contract forms and administration
Engagement Initiatives
Engagements invite input to proposed changes affecting Ontario's electricity markets and initiatives
Market Operations
Resources and information to facilitate participation in Ontario's electricity market
Market Oversight
Role of monitoring and compliance enforcement with market rules and reliability standards
Feed-in Tariff Program
A program to facilitate renewable generating facilities using a standardized, open and fair process
News and Subscribe
Stay informed, read IESO news or releases and subscribe to the weekly Bulletin
Technical Resources
Resources in support of interacting with IESO systems
Market Renewal
The Market Renewal is introducing fundamental reforms to the province's electricity markets to improve how we supply, schedule and price electricity to meet Ontario's future needs at the lowest cost. Market Renewal webpages are now accessible through the top navigation.
Planning and Forecasting
Assessment of system adequacy and reliability looking out short to longer term timeframes
Registered Participants
A list of all registered participants (energy markets, transmission rights market, and programs) as well as service providers.
Settlements
Process for invoicing market transactions, Global Adjustment and other electricity charges
Smart Metering Entity
Resources for distributors in support of Ontario's MDM/R and access to smart meter data.
System Reliability
Resources in support of market participant reliability standards and emergency preparedness obligations
