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Rate Case 2025
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In May 2025, APS filed a notice of intent with the Arizona Corporation Commission (ACC) indicating that we plan to file a request for new rates to take effect in the second half of 2026. This is the first step in a public, collaborative process that typically takes about a year.
We’re asking the ACC to review investments we’ve made in 2024 and 2025 to determine the appropriate amount APS is allowed to be paid back. This process – known as a “rate case” – is a legal procedure that ultimately will set the price we charge customers going forward.
We understand it's never easy to hear bills may go up in the future, but this case supports our commitment to:
- Invest in reliable and resilient energy: We’re investing in our energy infrastructure to provide all customers with the industry-leading reliability they count on and to increase our energy grid’s resilience under all weather conditions.
- Powering opportunity for Arizona’s growth: The investments in this rate case help APS support the needs of a rapidly growing Arizona, while making sure growth pays for growth.
- Improve support for customers: We continue ongoing efforts to support our customers through programs, technologies, and services that deliver them excellence in service and make it easier to do business with us.
- Keep costs as low as possible: We know prices are rising everywhere so we’re doing what we can to keep our own costs down through various efficiencies, and making sure each customer group pays for their cost of service.
More information will be available here when we file our rate case request in the coming months. To follow this rate case, view docket #E-01345A-25-010 on azcc.gov.
If you have any questions concerning our filing and application, you may contact APS at: 400 N. 5th St, M.S. 9708, Phoenix, AZ, 85004, Attn: Rate Case Manager; by calling
602-250-4220; or emailing ratecase@aps.com.
Frequently Asked Questions
Unlike most companies who can independently set their own prices for the goods and services they provide, APS is a regulated utility that must file a request with the Arizona Corporation Commission (ACC) to open a public process called a rate case. APS typically files such a request every few years and asks the ACC to review expenses and investments (in this case, made in 2024 and 2025) to determine the appropriate amount APS is allowed to be paid back. This robust legal process and review will set the prices we charge customers going forward.
It generally takes about a year to process a rate case depending upon the complexity of the issues and number of participants.
- APS files a notice of intent to file a rate case.
- APS files its rate case, which includes details of its request.
- Participants and ACC staff have an opportunity to provide testimony.
- Public is invited to provide comment on the proceeding.
- ACC administrative law judge (ALJ) hears the case.
- ALJ issues a recommended opinion and order (ROO).
- Commissioners hold an open meeting to discuss and vote on the ROO.
It is normal for a utility to file a rate case every 2-3 years, particularly when there have been significant changes since its previous case. APS’s last rate case was filed in 2022 so current rates are based on expenses from 2021/2022 which do not reflect today’s costs. Since then, we have spent more than $2 billion every year maintaining and improving our infrastructure to reliably serve our customers. The case we are filing this year seeks to recover investments made in 2024 and 2025.
Our focus is to strengthen the reliability of Arizona’s electricity infrastructure, provide power to new customers while protecting existing customers from bearing those expenses, support continuous improvements in meeting the needs of our customers, and keeping costs as low as possible. A key element of our request is a formula rate proposal, which allows for smaller, annual price changes – that can be reductions or increases – based on the previous year’s expenses and investments. We are still in the process of finalizing the request, which will be publicly available when we file our rate case in the coming months.
We’re making the grid more resilient during extreme weather with our fire mitigation efforts such as pole replacement and vegetation management. We’re also installing smart grid technology that allows our crew to isolate and reroute power for quicker restoration times. These are just a few of the many improvements that help provide customers with reliable power.
All of the details of our request, including the proposed customer rates, are still under development and will be a part of our rate case filing.
APS offers the highest discount and funding for limited-income utility customers in Arizona. In 2024, more than 82,000 limited-income customers received a 25%, 35% or up to 60% discount on their bill for approximately $46 million in savings. In addition, nearly 60,000 customers received more than $21 million in assistance from state, federal, APS shareholders and other sources. We highly encourage and work closely with customers to find the financial assistance that will help them with their energy bills.
We also offer energy efficiency programs and resources to help customers learn more about ways they can conserve energy, find their Most Economical Plan, and tips to save on their bills all year long. Budget Billing is also available for customers to levelize monthly bills and reduce the seasonal swings Arizona weather can cause to bill. Learn more.
