Long Lead-Time RFP

Ontario’s electricity sector continues to see a growing demand into the 2030s and beyond due to increasing industrial demand, data center growth and electrification. To meet these needs while maintaining flexibility, the IESO has taken a multi-pronged approach to secure energy and capacity resources under various term lengths.

Recent procurements have focused on securing medium term and long-term resources with 5- and 20-year term lengths respectively. The Long Lead-Time Request for Proposals (LLT RFP) is intended for eligible resources with unique development considerations that require longer lead times for project development and longer-term lengths, aligned with the expected resource lifetime.

LLT RFP Updates

The latest draft documents for the LLT(c) RFP have now been posted and can be found below. The IESO intends to post LLT(e) RFP draft documents in Q4 2025.

For further information about upcoming engagement sessions, please visit the IESO’s Long Lead-Time RFP Stakeholder Engagement webpage.

Any general enquiries regarding the LLT can be sent to LLT.RFP@ieso.ca.

Engaging Stakeholders

Learn more about the engagement plan, objectives, approach, timeline and considerations for engaging stakeholders.

Subscribe for Updates

Visit the IESO's subscribe page to sign up for future Long Lead-Time RFP updates.

LLT RFP Procurement Documents

LLT(c) RFP - Long Lead-Time – Capacity 

  1. Draft LLT(c) RFP (October 20, 2025)
  2. Draft LLT(c) RFP – Blacklined to Consolidated LT2(c-1) RFP (October 20, 2025)
  3. Draft LLT(c) Contract (October 20, 2025)
  4. Draft LLT(c) Contract – Blacklined to Consolidated LT2(c-1) Contract (October 20, 2025)