MADISON, Wis. (Sept. 3, 2025) — Alliant Energy (NASDAQ: LNT) today filed with the Public Service Commission of Wisconsin (PSC) a unanimous settlement agreement regarding electric and natural gas rates in Wisconsin for 2026 and 2027. Alliant Energy reached this settlement with all of the intervening parties who represent a broad array of stakeholders, including Blacks for Political and Social Action of Dane County (BPSA), Citizens Utility Board (CUB), Clean Wisconsin, International Brotherhood of Electrical Workers Local 965 (IBEW), RENEW Wisconsin, Wisconsin Industrial Energy Group (WIEG) and Walmart.
“The settlement filed with the Public Service Commission of Wisconsin reflects the collaborative effort among stakeholders to advance Alliant Energy’s commitment to provide cost-effective, reliable energy to customers,” said David de Leon, president of Alliant Energy’s Wisconsin energy company. “We appreciate the thoughtful, transparent engagement and are confident our balanced energy mix, along with increased customer offerings, will help grow the communities we serve while also powering customers forward.”
The settlement, subject to final approval by the PSC, includes:
- A 5.4% increase to electric rates in 2026 and 5% incremental increase in 2027
- A 5.6% increase to natural gas rates in 2026 and 3.9% incremental increase in 2027
- A financial equity layer of 53% and an authorized return on equity of 9.8%
- Recovery of electric rate base additions
- A 14% reduction in projected monitored fuel costs
During the two years covered by the settlement, Alliant Energy will pilot new customer offerings and affordability programs while continuing investments in its balanced energy portfolio. The settlement further aligns rate increases in Wisconsin with customer affordability and reflects the company’s continued operation and maintenance cost management practices.
Advancing Responsible Energy Solutions
- Launch of a pilot Customer Affordability Program with a $26 monthly bill credit for eligible low- and moderate-income customers
- Expansion of demand response and time-of-use programs to help customers save and manage energy use
- Building a Reliable, Resilient and Safe Energy Future
- Investments in solar projects, Columbia Energy Storage and vegetation management to enhance grid reliability and safety
Empowering Customers and Expanding Energy Options
- New EV programs: rebate program for residential Level 2 EV charger and fleet electrification advisory service
- Enhanced outreach and participation in existing programs
Supporting Regional Growth Through Long-Term Planning
- Commitment to developing another community solar site in Wisconsin by 2030
- Development of 3 megawatts of customer-hosted solar projects by 2030
Additional details are available on the PSC’s electronic filing system under Docket 6680-UR-125.
Media Contacts
Media contact: Taylor Adams (515) 868-9294 | [email protected]
Investor relations contact: Melissa Kehoe (608) 458-3124 | [email protected]
Forward-looking Statements
This media release contains information that may be considered forward-looking statements, including the terms of the rate review settlement impacting rates and financial parameters for 2026-2027. Actual results could differ materially because the realization of those results is subject to many uncertainties, including regulatory action by the Public Service Commission of Wisconsin on Wisconsin Power and Light Company's (WPL) rate review settlement agreement and other factors discussed in more detail in Alliant Energy Corporation’s (Alliant Energy) SEC filings. Alliant Energy and WPL cannot provide any assurance that the assumptions used in the forward-looking statements or otherwise are accurate or will prove to be correct. All forward-looking statements included in this media release are based upon information presently available, and Alliant Energy and WPL assume no obligation to update any forward-looking statements.
About Alliant Energy
Alliant Energy Corporation (NASDAQ: LNT) provides regulated energy service to approximately 1 million electric and 430,000 natural gas customers across Iowa and Wisconsin. Alliant Energy's mission is to deliver energy solutions and exceptional service customers and communities count on – safely, efficiently and responsibly. Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL) are Alliant Energy's two public energy companies. For more information, visit alliantenergy.com and follow Alliant Energy on LinkedIn, Facebook, Instagram and X.