Data centers in Indiana

The Indiana Utility Regulatory Commission fully approved NIPSCO's special contract with Amazon Data Services and NIPSCO Generation's related power purchase agreement, covering two 1.3 gigawatt gas plants plus a 400 megawatt battery system, in an order dated June 17, 2026. NIPSCO says the 15 year deal is expected to save residential ratepayers about 1 billion dollars, with power deliveries to Amazon's Indiana data centers beginning January 1, 2027.

NIPSCO filed for about 368.7 million dollars in additional annual revenue in September 2024. The IURC approved a settlement on June 26, 2025 that cut the increase to about 257 million dollars, below NIPSCO's original request and above the 230.4 million dollars recommended by the state consumer counselor. The deal kept the fixed monthly residential customer charge at its existing 14 dollar level rather than raising it further.

AES Indiana originally sought a 192.9 million dollar rate increase. After a settlement with industrial customers, Walmart and the City of Indianapolis, the IURC voted 3 to 1 on June 17, 2026 to approve a smaller 71 million dollar increase, an overall bill impact of about 3.7 percent phased in over two steps in July 2026 and January 2027. For a typical residential customer using 1000 kWh a month, each phase adds less than 5 dollars. The state consumer counselor and a citizens group asked the IURC to reconsider the decision in July 2026.

Duke Energy Indiana asked the IURC for about 492 million dollars in additional annual revenue, a roughly 16.2 percent increase. The commission decided the case on January 29, 2025 and authorized about 295.7 million dollars instead, below what Duke requested and above what the state consumer counselor recommended. The increase was phased in two steps, with roughly an 8 percent rise starting February 27, 2025 and a further step of about 3 percent in early 2026.

After Amazon Web Services announced an 11 billion dollar data center campus near New Carlisle, Indiana, Indiana Michigan Power reached a settlement with AWS, Microsoft, Google, the state consumer counselor and the Data Center Coalition on how large new customers pay for the grid upgrades they require. The Indiana Utility Regulatory Commission approved the deal on February 20, 2025. It requires a 12 year minimum contract, requires large customers to pay for at least 80 percent of their reserved capacity whether they use it or not, and sets an exit fee that can exceed 1 billion dollars for a 1 gigawatt customer that leaves early.