Integrated Grid Plan
Learn more about our plans to invest in a more reliable, cost-effective, and prosperous energy future.
Proposed Grid Plan (2028-2031)
Ameren Illinois is preparing to file its second multi-year integrated grid plan (2028-2031) with the Illinois Commerce Commission (ICC), in alignment with Illinois state laws—the Climate and Equitable Jobs Act (2021) and the recently passed Clean and Reliable Grid Affordability Act (2026). The proposal seeks approval of programs and investments to guide the infrastructure improvements and customer program upgrades needed to manage the shift to cleaner energy sources while ensuring that always-on, reliable power is available to meet growing demand.
Our Vision
Careful Cost Management
Grid upgrades will be executed in a manner that contains operating costs, improves efficiencies, and ensures that always-on power is delivered cost-effectively – for all customers.
Reliability and Resiliency
Infrastructure improvements will make the electric delivery system more reliable and resilient, and prepared to safely accommodate new sources of clean energy generation while withstanding the impacts of severe weather events.
Engaged and Empowered Customers
A more modern grid, along with energy efficiency and demand management programs, will give customers the tools to take control of their energy decisions, reduce their energy usage, and save money.
Economic Development
The grid will be equipped to serve new and expanding businesses, offering Illinois a competitive advantage in the race to attract and retain job-creating investment.
Current Grid Plan (2024-2027)
On December 19, 2024, the Illinois Commerce Commission (ICC) approved Ameren Illinois' multi-year (2024-2027) integrated grid plan — the Company's first approved plan under the new process established by CEJA. The plan outlines planned investments centering on maintaining safe and reliable service through modernization of the electric grid, replacement of aging infrastructure, preventative maintenance, and automation, while also directing more than half of the investments to benefit customers living in equity-eligible communities.
Frequently Asked Questions
An integrated grid plan is a requirement under CEJA, which is a 2021 state law that aims to move Illinois to 100% carbon-free energy sources by 2050. On January 20, 2026, Ameren Illinois filed its second multi-year integrated grid plan (2028-2031) since the law took effect.
The plan asks the Illinois Commerce Commission (ICC) for approval of programs and investments the company will make to strengthen the reliability and resiliency of the electric grid and prepare for an equitable transition to clean energy. Execution of the Multi-Year Integrated Grid Plan will enable Ameren Illinois to continue to deliver safe, secure, and reliable power in an equitable and cost-effective manner.
Illinois is at the forefront of a nationwide energy transformation as it transitions from fossil fuel energy generation to cleaner, carbon-free resources. Additionally, the electric grid that has reliably served homes and businesses for generations now faces new energy demands driven by factors such as the expansion of data centers, increased electrification, and growth of U.S. based manufacturing.
In order to facilitate this transition and allow for these growth opportunities, grid enhancements are needed to build a smarter, stronger, and more connected grid that unlocks the full range cost and energy savings benefits for customers.
The filing of the company's integrated grid plan will kickstart an 11-months long process at the ICC, in which stakeholders, customers, and interested parties will have the opportunity to offer feedback and input. The plan is likely to go through revisions before an official order on the proposal is given. An ICC final order is expected in December 2026.
The plan, if approved by the ICC, will go into effect January 2028.
As a delivery-only company, Ameren Illinois does not generate power, nor does it control the cost of electricity. The recent price spikes have been a result of supply and demand imbalances. However, we do have an obligation to ensure any new generation that comes online can be distributed to our business and residential customers safely and reliably. This plan will allow us to fulfill that need.
The integrated grid plan proposes capital and operational investments over the four years of the plan (2028-2031). In January 2027, the company plans to file a complementary rate plan to set new rates based on the approved investments in the grid plan.