Integrated Resource Planning

The Illinois Integrated Resource Plan (IRP) is a comprehensive planning process designed to evaluate Illinois customers’ present and future energy and demand needs relative to the resources available to provide the necessary supply – evaluating if supply matches the energy needs over time. Further, the IRP develops solution sets to solve shortfalls or prospective reliability challenges and grid constraints to ensure consistent, sufficient, reliable, and cost-effective resources are available.

The IRP provides a structured framework for assessing the state’s electric supply, demand trends, and system reliability considerations over the near-and-long-term planning horizon.

Statutory Authority

The IRP is authorized under the Clean Reliable Grid Affordability Act (CRGA), which charges the Illinois Commerce Commission (ICC), in collaboration with the Illinois Power Agency (IPA), the Illinois Environmental Protection Agency (IEPA), and the Illinois Finance Authority (IFA), with conducting an initial IRP.

The initial IRP report is required to be issued by November 16, 2026, with updated plans to be developed on a four-year cycle thereafter.

Process and Coordination

The IRP process is led by the ICC and conducted in coordination with the IPA, IEPA, and IFA. The IRP process is expected to be informed by related reliability and resource adequacy analyses conducted by IPA, ICC, and IEPA, including the Resource Adequacy Study Mitigation Plan process. Throughout the IRP process the Agencies will work to align the Mitigation Plan and IRP processes. This may results in the merging of workshops, requests for stakeholder feedback, scenario and sensitivity design, data inputs and or other activities.

Timeline and Public Engagement

The initial IRP report will be issued by November 16, 2026. To access information on milestones, timeline, stakeholder engagement opportunities, please visit the Workshop Information page on the IPA website and the IRP web page on the ICC’s website.

Agencies to hold workshops on April 7 and April 10 - see the Workshop page for details

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