A battle unfolding in Arizona could help determine whether families or technology companies pay for the massive electricity demands of artificial intelligence.

Arizona Public Service (APS), the state’s largest electric utility, is seeking approval from the Arizona Corporation Commission to increase rates on data centers by more than 45% while raising residential rates by about 16%, according to hearings that began on May 18 and continued into early June.

The proposal is part of a broader rate case APS filed in June 2025, seeking an overall 14% increase in customer rates. If approved, the utility estimates the average residential customer would pay roughly $20 more per month.

At the center of the debate are the giant data centers powering artificial intelligence and cloud computing. These warehouse-sized facilities consume enormous amounts of electricity and often require utilities to build additional power plants, substations, and transmission infrastructure.

APS argues that the companies creating that demand should pay a larger share of the costs rather than passing them on to families and small businesses.

The utility is also proposing a system of formula rates, allowing regulators to review costs annually and assign infrastructure expenses to the customer groups driving those costs. Under that approach, rapidly growing data centers could face significantly higher charges as their power consumption expands.

APS says the rate increases are necessary because the utility’s current rates are based largely on equipment costs from 2021 and 2022, while inflation has substantially increased the price of transformers, transmission equipment, labor, and other critical grid components.

The company argues that additional revenue is needed to maintain reliability during Arizona’s extreme summer heat, when air-conditioning demand reaches its highest levels.

The proposal has generated fierce opposition.

Arizona Attorney General Kris Mayes has criticized the residential increase, arguing that APS is seeking excessive profits and that customers could face smaller increases if the utility were compensated only for the actual costs required to provide reliable service.

Public hearings have drawn large crowds, with many residents, particularly seniors and those living on fixed incomes, warning that even modest increases could make summer cooling unaffordable.

The debate over data centers may ultimately become the most important part of the case.

According to the Electric Power Research Institute, data centers could account for more than 20% of Arizona’s electricity consumption by 2030. That rapid growth is forcing utilities nationwide to reconsider how electric systems are financed.

The question is simple but consequential: Should ordinary ratepayers help finance infrastructure built primarily to serve AI companies, or should those companies bear the costs themselves?

Arizona is one of the first major states attempting to answer that question directly.

The issue is drawing national attention because electric utilities across the country are facing similar challenges. Demand from artificial intelligence, cloud computing, and advanced manufacturing is increasing electricity consumption at a pace not seen in decades.

Meanwhile, major technology companies have sought to reassure regulators and consumers.

Earlier this year, Google, Meta, Microsoft, OpenAI, and Amazon Web Services joined a pledge stating that data-center expansion should not result in higher energy costs for residential customers.

Critics, however, argue that voluntary commitments may not fully address the infrastructure expenses associated with the largest AI projects.

A judge is currently reviewing testimony from more than 30 parties before issuing a recommendation to the five-member Arizona Corporation Commission, which is expected to make a final decision later in 2026.

If approved, the new rates could take effect during the second half of the year.

The outcome may reach far beyond Arizona.

As artificial intelligence continues expanding, so will its demand for electricity. Regulators nationwide are closely watching whether Arizona successfully requires data centers to pay a larger share of the costs they create—or whether those costs ultimately find their way onto household electric bills.

JBizNews Desk — Arizona

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