Alliant Energy Rate Hike for 2026-2027

In April 2025, Alliant Energy (Wisconsin Power & Light) filed a general rate case to increase rates in 2026-27.

        In PSC case 6680-UR-125, Alliant seeks:

Focus on profits

• • • Alliant proposes to increase its profit rate, or return on equity, from 9.8% to 9.9%. But that rate is still higher than the national average and is more than is needed to attract capital on Wall Street. Alliant is also requesting a different change that would allow it to profit more than it does already — allowinga greater portion of its spending to capture 9.9% returns.

Profits too high

• • • Alliant’s Wisconsin utility reported 2024profit of $689 million, or more than triple the size of the increased costs being sought over the next two years.
  • Customers across the country are overpaying by billions from profit rates that have remained far too high for far too long.

The cost of the energy transition

• • • Major drivers of Alliant’s electric rate case include items related to the company’s new capital investments, including upgrades to natural gas plants in Sheboygan Falls and Neenah, wind energy projects and a carbon dioxide energy storage project in Portage.
    • Overrun costs from solar projects that went over budget are also being sought in this case.
    • Alliant is citing the increase in transmission costs and investments in its distribution system as other drivers for the increase.
    • Fuel costs are expected to decline 6% next year.

Other proposals

• • • Affordability: Alliant is proposing to reduce reconnection fees for low-income customers and expand eligibility for its arrearage management program. Alliant proposes to shift customers who would benefit greatly to time-of-use (nights and weekends) rates. Alliant, CUB and other stakeholders are evaluating additional changes as part of an investigation to improve customer affordability.
  • EV pilot: Alliant is proposing an electric vehicle pilot program.
  • Outreach to high-use customers: Alliant is planning an outreach campaign to encourage customers who use significant amounts of electricity to shift to time-of-use, also known as “nights and weekends,” rates.
  • Divvying up the pie: CUB will be advocating for the PSC to protect homeowners, renters and small commercial and industrial customers from bearing the brunt of any approved increases. Separately, in response to a request from CUB, the PSC launched a divvying-the-pie investigation in 2024.

Timeline

• • • Spring/Summer: PSC Audit, Analysis
  • • August: CUB experts, PSC staff weigh in with testimony, briefs.
    • Sept./Oct.: Public Hearing (Date TBD)
  • November: PSC Discussion and Decision on the Case.
  • December: PSC Final Decision

Find out more

• • • See the filings in the case at the PSC here.
  • Create a “ERF-EZ Subscription” to see when new information is filed. (6680-UR-125)

Have your say

• • Check CUB’s Active Cases page and the PSC’s New Applications Page for current cases involving Alliant Energy.
  • Submit a written comments on PSC cases and find out about public participation here.