Short answer: It is genuinely disputed. A 12News analysis found APS residential customers paid far more per unit of new load than the commercial sector from 2022 to 2025, but APS and SRP dispute that framing and say large loads pay their own way. The Arizona Corporation Commission is deciding the question now, with the APS rate case expected to conclude in late 2026.
The claim that lit the fuse
A 12News data analysis looked at APS load growth from 2022 to 2025 and found that residential customers paid much more per unit of new load than the commercial sector did. In their reading, commercial use, driven largely by data centers, accounted for most of the consumption growth but a smaller share of the extra revenue APS collected. The takeaway people drew: homeowners have been carrying the cost of the boom.
That is a striking finding, and worth taking seriously. It is also one news outlet's analysis of the numbers, not a ruling by regulators. So treat it as a serious claim that is now being tested, not as proven fact.
What the utilities say back
APS and SRP both reject the idea that data centers shift costs onto homeowners, and they point to specific mechanisms.
APS has proposed a separate rate class for extra-large loads, with rates well above standard commercial, explicitly framed as making sure residential customers do not subsidize data centers (APS, Daily Energy Insider). SRP points to its Large Customer Integration Process and an updated E-67 price plan that require customers above 20 MW to cover their own infrastructure and meet minimum billing, arguing data centers must pay for the grid built to serve them (Arizona Capitol Times). Other Arizona utilities have made similar public arguments (AP).
Where it actually gets decided
The venue is the Arizona Corporation Commission, which regulates APS. The ACC held a large-load and data-center workshop in April 2026 on how to handle this, and the pending APS rate case is expected to conclude in late 2026 (ACC). SRP, again, sets its own rates through its elected board. So whether large loads end up carrying their full share is a live regulatory question, not a thing any single side gets to declare.
For the bigger picture on why demand is surging in the first place, see why your Arizona electric bill keeps going up, and for the pending increase specifically, the APS 2026 rate increase.
Why this matters even if the utilities are right
Say the rate structures work exactly as APS and SRP claim. Demand is still exploding, the grid still needs billions in upgrades, and rate cases still reflect that. Either way, your bill has been climbing and the pressure is not letting up. Regulators move slowly; your monthly bill does not.
That is the case for taking the one lever you actually control. Owning solar fixes the cost of the power you generate, so however the data-center fight ends, the rate hikes you cannot control land on a smaller remaining bill. The federal 30% residential credit ended December 31, 2025, but the Arizona state credit (up to $1,000) still applies and $0-down financing is common. Get a first estimate with the savings calculator, or read is solar worth it in Arizona.
Common questions
Are data centers raising my electric bill in Arizona?
It is genuinely disputed. A 12News data analysis found APS residential customers paid much more per unit of new load than the commercial sector from 2022 to 2025, suggesting homeowners carried a heavy share of growth costs. The utilities dispute that framing and say large loads pay their own way through dedicated rate structures. The question is being decided at the Arizona Corporation Commission.
What did the 12News analysis find?
According to 12News, for every unit of new load added from 2022 to 2025, APS residential customers paid far more per unit than the commercial sector, while commercial use (driven largely by data centers) accounted for most of the consumption growth but a smaller share of the added revenue. It is one outlet's analysis of the data, not a regulatory finding.
How do APS and SRP say they protect homeowners?
APS has proposed a separate customer class for very large loads with much higher rates, explicitly so residential customers do not subsidize data centers. SRP points to its Large Customer Integration Process and updated E-67 plan, which require big customers to cover the infrastructure built to serve them. Both positions are on the record; whether they fully prevent cost-shifting is what regulators are weighing.
Who decides whether data centers pay their fair share?
For APS, the Arizona Corporation Commission, which held a large-load workshop in April 2026 and is reviewing the APS rate case expected to conclude in late 2026. SRP sets its own rates through an elected board. So the outcome runs through public bodies, not the utilities alone.
If regulators handle it, why would I go solar?
Because the outcome is uncertain and slow, and your bill keeps arriving in the meantime. Regulators may or may not make large loads carry their full share. Owning solar is the one lever you control directly: it fixes the cost of the power you generate regardless of how the rate fight ends.
This piece describes an ongoing regulatory dispute. Positions and figures may change as the ACC case proceeds. Your own savings depend on your home, usage, utility, and financing.