Integrated Resource Plan (IRP)
Source: https://www.icc.illinois.gov/informal-processes/Integrated-Resource-Plan
Archived: 2026-04-23 17:09
Integrated Resource Plan (IRP)
Home
Informal Processes
Integrated Resource Plan (IRP)
An integrated resource plan (IRP) is a roadmap for meeting forecasted electricity demand. New Illinois law tasks the Illinois Commerce Commission (ICC) Staff, the Illinois Power Agency, the Illinois Finance Authority, and the Illinois Environmental Protection Agency (collectively, the Agencies) with proposing an IRP that is likely to serve Illinois customers in a manner that is adequate, safe, reliable, affordable, efficient, environmentally sustainable, at the lowest cost over time, and consistent with the energy policy goals of the State. The IRP process provides regulators and stakeholders with information on power demand, reliability, resource adequacy, costs, risks, and other important factors affecting Illinois utility customers.
Workshops
February 18, 2026 Workshop (In-Person)
1-3 pm, ICC Main Hearing Room located at 160 N. La Salle, 8th floor, Chicago, IL
Workshop Agenda and Presentations
Workshop Recording
Agenda
Presentation - Jim Zolnierek
Presentation - Scott Metzger
Presentation - Tim Hermann
Presentation - Nicole Luckey
April 7, 2026 Workshop (Virtual)
11 am – 1 pm. CT
(Registration is required to attend this virtual workshop)
April 7 Workshop Presentation
April 7 Workshop Recording
This combined IRP and Mitigation Plan virtual workshop will focus on scenario design. An overview of stakeholder feedback received during prior ICC and IPA workshops will be provided as well as draft recommendations for scenario topics and key drivers for modeling purposes. Stakeholders will be invited to provide input on the proposed recommendations.
Workshop materials are expected to be released approximately one week in advance, with a follow-up communication issued once materials are available.
April 10, 2026 Workshop (Virtual)
11 am – 1 pm. CT
(Registration is required to attend this virtual workshop.)
April 10 Workshop Presentation
April 10 Workshop Recording
Illinois Resource Cost Workbook (Assumptions Workbook)
This combined IRP and Mitigation Plan virtual workshop will focus on proposed updates to the candidate resource types to be used, including Distributed Energy Resources (DERs) and Virtual Power Plant (VPP) definitions. Stakeholder feedback on the proposals, along with supporting data and modeling assumptions (e.g., VPP modeling), including development timelines and cost assumptions for emerging technologies will be invited.
Workshop materials are expected to be released approximately one week in advance, with a follow-up communication issued once materials are available.
Request for Comments
When preparing your responses for submission, please ensure they meet accessibility requirements as outlined in the
Accessibility Guides
, pursuant to the
Illinois Information Technology Accessibility Act
. The
Accessibility Guides
include links to guides for various file types. The most commonly submitted files are Word documents (see
Word Accessibility
) and Excel spreadsheets (see
Excel Accessibility
).
Request for Comments #1
Due on
February 9, 2026
.
Parties who want to reply to any or all of the 21 responses received to the first Request for Comments, are invited to do so by March 16. Please email your reply comments to
june.poon@illinois.gov
. All reply comments will be posted to this web page
Responses
Advanced Energy Response
Ameren Illinois Response
American Council for an Energy Efficient Economy Response
Clean Grid Alliance Response
Climate Jobs Illinois Response
ComEd Response
Constellation Energy Generation Response
Earthrise Energy Response
Form Energy Response
Illinois Clean Jobs Coalition Response
Illinois Farm Bureau Response
Illinois Industrial Energy Consumers Response
Illinois Manufacturers’ Association Response
Invenergy Response
Midwest Energy Efficiency Alliance Response
Nicor Gas Responses
Peoples Gas & North Shore Gas Response
REACT Response
SOO Green HVDC Response
Vistra Corp Response
Zenobe Response
Reply Comments
Ameren Illinois Comments
Clean Grid AllianceComments
Illinois Clean Jobs Coalition (ICJC) Comments
Illinois Industrial Energy Consumers (IIEC) Comments
Invenergy Comments
Oracle Comments
REACT Comments
SOO Green HVDC Link Comments
Get Involved
Stay up to date with the IRP process by joining our distribution list:
Join The Distribution List
Background
The Clean and Reliable Grid Affordability Act (CRGA,
Public Act 104-0458
) was enacted on January 8, 2026, and will be effective June 1, 2026. CRGA amends the Illinois Public Utilities Act (220 ILCS 5) to include, among other things, Sections 16-201 and 16-202, which pertain to IRPs that will “plan for sufficient electricity resources to serve Illinois customers in a manner that is adequate, safe, reliable, affordable, efficient, environmentally sustainable, at the lowest cost over time, and consistent with the energy policy goals of the State, including, but not limited to, the clean energy policy established by Public Act 102-0662.”
The Agencies, coordinated by ICC Staff, are required to propose an IRP, the first of which is due to the ICC on November 15, 2026. The second IRP report will be due September 30, 2029, with subsequent reports every four years thereafter. The ICC has 180 days from the IRP report submission to approve the IRP, with or without modification. If needed, the ICC may extend the IRP approval process by an additional 180 days.
To access materials from prior related engagements, the following links are provided below:
Resource Adequacy Study
Renewable Energy Access Plan
Home
Informal Processes
Integrated Resource Plan (IRP)
An integrated resource plan (IRP) is a roadmap for meeting forecasted electricity demand. New Illinois law tasks the Illinois Commerce Commission (ICC) Staff, the Illinois Power Agency, the Illinois Finance Authority, and the Illinois Environmental Protection Agency (collectively, the Agencies) with proposing an IRP that is likely to serve Illinois customers in a manner that is adequate, safe, reliable, affordable, efficient, environmentally sustainable, at the lowest cost over time, and consistent with the energy policy goals of the State. The IRP process provides regulators and stakeholders with information on power demand, reliability, resource adequacy, costs, risks, and other important factors affecting Illinois utility customers.
Workshops
February 18, 2026 Workshop (In-Person)
1-3 pm, ICC Main Hearing Room located at 160 N. La Salle, 8th floor, Chicago, IL
Workshop Agenda and Presentations
Workshop Recording
Agenda
Presentation - Jim Zolnierek
Presentation - Scott Metzger
Presentation - Tim Hermann
Presentation - Nicole Luckey
April 7, 2026 Workshop (Virtual)
11 am – 1 pm. CT
(Registration is required to attend this virtual workshop)
April 7 Workshop Presentation
April 7 Workshop Recording
This combined IRP and Mitigation Plan virtual workshop will focus on scenario design. An overview of stakeholder feedback received during prior ICC and IPA workshops will be provided as well as draft recommendations for scenario topics and key drivers for modeling purposes. Stakeholders will be invited to provide input on the proposed recommendations.
Workshop materials are expected to be released approximately one week in advance, with a follow-up communication issued once materials are available.
April 10, 2026 Workshop (Virtual)
11 am – 1 pm. CT
(Registration is required to attend this virtual workshop.)
April 10 Workshop Presentation
April 10 Workshop Recording
Illinois Resource Cost Workbook (Assumptions Workbook)
This combined IRP and Mitigation Plan virtual workshop will focus on proposed updates to the candidate resource types to be used, including Distributed Energy Resources (DERs) and Virtual Power Plant (VPP) definitions. Stakeholder feedback on the proposals, along with supporting data and modeling assumptions (e.g., VPP modeling), including development timelines and cost assumptions for emerging technologies will be invited.
Workshop materials are expected to be released approximately one week in advance, with a follow-up communication issued once materials are available.
Request for Comments
When preparing your responses for submission, please ensure they meet accessibility requirements as outlined in the
Accessibility Guides
, pursuant to the
Illinois Information Technology Accessibility Act
. The
Accessibility Guides
include links to guides for various file types. The most commonly submitted files are Word documents (see
Word Accessibility
) and Excel spreadsheets (see
Excel Accessibility
).
Request for Comments #1
Due on
February 9, 2026
.
Parties who want to reply to any or all of the 21 responses received to the first Request for Comments, are invited to do so by March 16. Please email your reply comments to
june.poon@illinois.gov
. All reply comments will be posted to this web page
Responses
Advanced Energy Response
Ameren Illinois Response
American Council for an Energy Efficient Economy Response
Clean Grid Alliance Response
Climate Jobs Illinois Response
ComEd Response
Constellation Energy Generation Response
Earthrise Energy Response
Form Energy Response
Illinois Clean Jobs Coalition Response
Illinois Farm Bureau Response
Illinois Industrial Energy Consumers Response
Illinois Manufacturers’ Association Response
Invenergy Response
Midwest Energy Efficiency Alliance Response
Nicor Gas Responses
Peoples Gas & North Shore Gas Response
REACT Response
SOO Green HVDC Response
Vistra Corp Response
Zenobe Response
Reply Comments
Ameren Illinois Comments
Clean Grid AllianceComments
Illinois Clean Jobs Coalition (ICJC) Comments
Illinois Industrial Energy Consumers (IIEC) Comments
Invenergy Comments
Oracle Comments
REACT Comments
SOO Green HVDC Link Comments
Get Involved
Stay up to date with the IRP process by joining our distribution list:
Join The Distribution List
Background
The Clean and Reliable Grid Affordability Act (CRGA,
Public Act 104-0458
) was enacted on January 8, 2026, and will be effective June 1, 2026. CRGA amends the Illinois Public Utilities Act (220 ILCS 5) to include, among other things, Sections 16-201 and 16-202, which pertain to IRPs that will “plan for sufficient electricity resources to serve Illinois customers in a manner that is adequate, safe, reliable, affordable, efficient, environmentally sustainable, at the lowest cost over time, and consistent with the energy policy goals of the State, including, but not limited to, the clean energy policy established by Public Act 102-0662.”
The Agencies, coordinated by ICC Staff, are required to propose an IRP, the first of which is due to the ICC on November 15, 2026. The second IRP report will be due September 30, 2029, with subsequent reports every four years thereafter. The ICC has 180 days from the IRP report submission to approve the IRP, with or without modification. If needed, the ICC may extend the IRP approval process by an additional 180 days.
To access materials from prior related engagements, the following links are provided below:
Resource Adequacy Study
Renewable Energy Access Plan