Arizona’s largest electric utility just put a price tag on the AI boom, and data center operators are not going to like it.
Arizona Public Service (APS) filed a rate case requesting a revenue increase of approximately $662 million, or roughly 16%. The headline number: a more than 45% rate hike for extra-large electricity users like data centers. Residential customers, meanwhile, would see their monthly bills climb by about $20, translating to a 14-16% increase.
Why data centers are getting squeezed
APS forecasts its peak load growing by up to 40% by 2031, with data centers as the primary driver. That kind of demand surge requires enormous capital investment in generation capacity, transmission lines, and grid upgrades. The utility’s argument is straightforward: the customers causing the demand spike should bear a proportional share of the cost.
The rate case, filed under Docket E-01345A-25-0105, includes revised cost allocations specifically designed to prevent residential customers from subsidizing high-demand commercial users.
