Biennial rate review for 2026 and 2027 (Wisconsin) 

In December 2025, the Public Service Commission of Wisconsin (PSC) approved Alliant Energy’s unanimous rate review settlement covering years 2026 and 2027. Guided by our strategic plan and purpose-driven strategy, this settlement reflected investments in a balanced energy mix comprised of traditional, new and renewable energy sources. Collectively, this strategy positions us to deliver what matters most to our customers, communities, and the region – a responsible energy future that is cost-effective, reliable and safe.

For the average residential customer, the approved rate adjustment equates to:

• Electric: About $4 a month increase in 2026 (~3.5%) and another $8 a month in 2027 (~6%).
• Gas: About $2 a month increase in 2026 (~3%) and another $1.50 a month in 2027 (~2%).

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Changes to our electric and natural gas base rates for all customers in Wisconsin will take effect January 1, 2026, and January 1, 2027. For specific information about the approved settlement, call the PSC at 800-225-7729 or visit psc.wi.gov and search for docket number 6680-UR-125.

1. Cost-effectively advancing responsible energy solutions: Investment in a combination of traditional, new and renewable energy sources positions us to meet customer demand – today and long into the future.
2. Building a strong, reliable, resilient, safe energy future: Positions us to meet growing energy demands, maintain best in class reliability and promote long-term energy security.
3. Powering customers forward and expanding energy options: A variety of new innovative customer-focused options are included, such as new Time of Use and demand-response programs, EV rebates, and offerings to help low- to moderate-income customers with their utility bill.
4. Prudent, long-term planning supports community and business growth: Ongoing energy planning supports regional growth strategies designed to attract high-tech industries and other energy-intensive businesses that drive job creation and economic growth. This in turn helps to spread fixed costs over a larger base, keeping everyone's bills as low as possible.