# Arizona Public Service Seeks $579.52M Rate Hike

Arizona Public Service (APS) has asked the Arizona Corporation Commission to approve a **$579.52 million** net base-rate increase. The proposal includes an approximately 14% increase for residential customers and an increase of more than 45% for extra-large-load customers, including data centers. For government contractors, data center developers, and other organizations planning Arizona projects, the proceeding could change electricity costs and how new generation and transmission expenses are allocated. The proposed rates were slated to take effect no earlier than July 8, 2026, if approved; that date has passed, and the supplied signal does not establish whether the commission approved the request or whether new rates took effect.

- Companies developing or operating large-load facilities in Arizona can model the proposed rate increase and cost allocation as a scenario in project operating-cost and power-planning estimates.
- Contractors supporting data centers or other extra-large-load customers should account for potential electricity-cost changes when developing Arizona project budgets and pricing.
- The Arizona Corporation Commission proceeding is the relevant state regulatory process; the signal provides no contract award, solicitation, or procurement deadline.

**Jurisdictions:** sled
**Industries:** Energy & Utilities
**Topics:** Regulatory Compliance
**Published:** October 02, 2026

### Government Entities
- Arizona Corporation Commission (ACC)
- Arizona Attorney General's Office

### Vendors
- Arizona Public Service (APS) ()

### Sources
- [Arizona desert households face $20 more a month after a utility asked regulators for a residential rate hike while also seeking more than 45 percent more from data centers](https://gcn.com/arizona-desert-households-face-month-after/22110) - gcn.com