Arizona Electricity Rates: Beat the Heat

Arizona electricity is cheap by the kilowatt-hour and expensive by the month. That contradiction defines the state's energy landscape. The average residential rate sits around 15 cents per kWh — roughly 10% below the national average. But the average monthly bill lands at $160-164, which is actually higher than the national average of $155. The culprit is air conditioning. When it's 115 degrees outside for weeks on end, your AC runs nearly around the clock, and that 10% per-kWh discount evaporates into a bill that can hit $200-250 in a typical summer month or $400-700+ for larger Phoenix homes.

Understanding how Arizona's electricity market works — who sets your rates, what plan you're on, and when you use power — is the difference between surviving summer bills and getting blindsided by them. This guide covers everything Arizona homeowners need to know in 2026, from the quirks of the state's regulated market to concrete strategies that can cut your cooling costs dramatically.

How the Arizona Electricity Market Works

Arizona is a regulated electricity market. Unlike states such as Texas where you can shop for a provider, Arizona consumers are assigned a utility based on where they live. You cannot switch to a competitor — your utility is your utility.

The Arizona Corporation Commission (ACC) is the primary regulatory body. Five elected commissioners oversee investor-owned utilities, approving or denying rate increase requests through a public process that typically takes over a year. When APS or TEP wants to raise your rates, they must file a formal rate case, present their justification, and face scrutiny from consumer advocates and the state attorney general.

In December 2024, the ACC adopted a new mechanism called Formula Rate Plans (FRPs), which allow utilities to adjust rates annually based on a pre-established formula rather than going through a full rate case. This is controversial — critics argue it reduces public oversight of rate increases.

The SRP Exception

Here's where Arizona gets unusual. Salt River Project is not like the other utilities. Created in 1903 as the nation's oldest multipurpose federal reclamation project, SRP is a quasi-governmental entity — a political subdivision of the state. The ACC does not regulate SRP. Instead, SRP sets its own rates through an elected board of directors.

This means SRP can move faster than APS or TEP. When the board approved a temporary 3% summer rate decrease for May through October 2026, it happened through a single board vote — no year-long regulatory proceeding required. That flexibility can benefit customers, but it also means there's less formal oversight of how SRP structures its rates and charges.

If you live in metro Phoenix, there's roughly a coin flip between being in APS territory or SRP territory. Knowing which one you're in shapes everything from your rate plan options to whether you'll deal with demand charges.

What Arizonans Actually Pay

Let's put real numbers on the table. Here's what electricity costs across Arizona in 2026:

The paradox jumps off the page. Arizonans pay less per unit of electricity but more per month because they use so much of it. Air conditioning accounts for up to 60% of summer electricity consumption. Phoenix routinely sees 80+ consecutive days above 100 degrees, with temperatures exceeding 115 degrees for extended stretches. Add monsoon humidity in July and August, and your AC system is working harder than anywhere else in the country.

Seasonal swings are dramatic. A spring bill of $134-164 can jump by $100 or more heading into summer. If you want a systematic approach to taming those spikes, our guide on how to cut your electric bill in half is a good starting point.

Rate Trends: Increases Are Coming

Arizona's rates have been relatively stable — the ACC noted that the average cost per kWh increased by less than 2% while national prices escalated more steeply through mid-2025. But bigger increases are on the way:

• APS: Filed for a 13.99% rate increase in June 2025, which would add roughly $20/month for a typical 1,000 kWh customer. New rates could take effect as early as July 2026. Arizona Attorney General Kris Mayes has vowed to "vigorously oppose" the increase, noting that APS parent company Pinnacle West reported $609 million in net income in 2024.
• TEP: Requesting approximately 14% residential rate increase, adding $16-19/month, targeted for September 2026.
• SRP: Approved a modest 2.4% overall increase effective November 2025, adding $5.61/month for the average customer. But the board also approved a temporary 3% summer decrease for 2026, saving $5.57/month from May through October.

Understanding your bill line by line matters more than ever as rates climb. Our guide on how to read your electric bill and spot overcharges walks you through every charge.

APS vs SRP vs TEP: Comparing Arizona's Three Major Utilities

Your utility determines your rate plan options, billing structure, and even whether you'll face demand charges. Here's how the three major providers stack up:

APS serves the largest territory across 11 counties, with straightforward time-of-use pricing and no demand charges on standard residential plans. Their current average rate of about 12.8 cents per kWh is competitive, though the pending 14% increase would change the math considerably.

SRP covers most of metro Phoenix with roughly 970,000 electric customers and also manages water delivery from the Salt River and Verde River watersheds. SRP's billing is more complex — some plans include demand charges that can significantly impact your bill based on a single high-usage hour. However, SRP introduced new TOU plans without demand charges in November 2025, giving customers more flexibility.

TEP serves the Tucson metropolitan area at higher rates — around 17 cents per kWh. UniSource Energy Services (UES), TEP's sister company under the same parent, serves about 278,000 customers in scattered areas of northern and southern Arizona.

Time-of-Use Plans: Essential in Arizona

Time-of-use pricing is not optional knowledge in Arizona — it's central to managing your bill. Every major utility offers TOU plans, and understanding peak versus off-peak hours can save you real money every month. For a deep dive on the concept, see our guide on time-of-use electricity rates and how to pay less.

APS TOU Rate Windows

APS peak hours run 3 PM to 8 PM, Monday through Friday, year-round.

The Saver Choice plan is the most popular for a reason: straightforward pricing with no demand charges. You pay roughly double during peak afternoon and evening hours, which creates a clear incentive to shift laundry, dishwashing, cooking, and pool pump operation to before 3 PM or after 8 PM.

SRP TOU Rate Windows

SRP uses seasonal definitions: Summer (May-June, September-October), Summer Peak (July-August), and Winter (November-April). Peak hours and rates vary by season.

Key SRP options include:

• Basic Plan: Flat rate with no time-of-use component — the simplest option but not the cheapest for most households
• TOU Plans: Higher on-peak rates, lower off-peak rates, with potential for significant savings if you can shift usage
• New Super Off-Peak TOU Plans (launched November 2025): Feature super off-peak daytime hours from 8 AM to 3 PM with rates approximately 50% lower than the basic plan — designed to encourage electricity use during peak solar production hours
• Monthly service charge tiers: $20/month (multifamily), $30/month (typical single-family), or $40/month (large electric service entrance)

TEP TOU Rate Windows

TEP peak hours run 3 PM to 7 PM, Monday through Friday during summer.

EV Charging: Special Off-Peak Deals

If you drive an electric vehicle, both APS and SRP offer plans designed for overnight charging:

• APS: Super off-peak rate of 8.47 cents/kWh from 11 PM to 5 AM, plus a $25 enrollment credit and $5/month participation incentive through the Smart Charge Program
• SRP: Super off-peak rates on TOU plans from 11 PM to 5 AM, averaging 8.6% annual savings for overnight charging, plus a $250 rebate on Level 2 EV chargers through the SRP marketplace

Understanding Demand Charges

Demand charges are one of the most confusing — and potentially expensive — elements of Arizona electricity billing, particularly for SRP customers. If you're on a plan with demand charges, one bad hour can set your cost for the entire month.

How Demand Charges Work

A demand charge is based on your single highest period of electricity usage during on-peak hours in a billing cycle. It's measured in kilowatts (kW), not kilowatt-hours (kWh). Think of it this way: your energy charge measures how much total electricity you used, while your demand charge measures the fastest rate at which you used it.

If you run your AC, dryer, oven, and pool pump simultaneously during a peak hour, that spike in demand sets your demand charge for the entire month — even if it only happened once.

SRP Demand Charges

SRP has historically used demand charges on residential plans, and they remain on the Customer Generation Plan for solar customers. Demand is measured during 30-minute intervals during on-peak hours.

The impact is significant:

• Without management: Demand charges can add $80-110/month for typical homes
• With battery storage: Demand can be reduced below 2-3 kW, cutting the charge to $18-27/month

The good news: SRP's November 2025 rate restructuring introduced TOU plans without demand charges. If you're an SRP customer not generating solar power, you now have the option to avoid demand charges entirely by choosing one of the new TOU plans.

APS Demand Charges

APS does not use demand charges on most standard residential plans, relying instead on straightforward TOU pricing. Some specialized plans (Saver Choice Plus, Saver Choice Max) include demand components, but these are opt-in — you will not be placed on one unless you choose it.

Why Demand Charges Are Controversial

Demand charges have drawn criticism because they are hard for consumers to understand, punish momentary spikes rather than overall usage, and disproportionately affect solar customers. On SRP's Customer Generation Plan, solar homeowners face demand charges that can significantly erode the financial benefit of their panels. This controversy was a factor in SRP adding non-demand TOU options in November 2025.

Surviving Arizona Summer Bills

Summer is when Arizona electricity bills go from manageable to painful. Here's what you're up against and how to fight back.

Why Summer Bills Are So High

• AC accounts for up to 60% of summer electricity consumption
• Phoenix sees 80+ consecutive triple-digit days annually
• Temperatures regularly exceed 115 degrees for extended periods
• Monsoon season (July-August) adds humidity, forcing AC systems to work harder
• Summer bills run 40-70% above the national average
• Arizona has the highest summer bill increases of any state

Summer Survival Strategies

Thermostat management is your biggest lever. Set your thermostat to 78-80 degrees when you're home and higher when you're away. Pre-cool your home during off-peak hours (before 3 PM) and let the temperature rise slightly during peak. A smart thermostat automates this strategy and can cut cooling costs by 10-15%.

Shade your west-facing windows. Afternoon sun hitting west-facing glass is the single biggest source of heat gain in Arizona homes. External shading — awnings, shade screens, or strategically placed trees — is far more effective than interior blinds, though closing blinds on south and west windows during peak sun helps too.

Use ceiling fans strategically. A ceiling fan costs roughly 1 cent per hour to run compared to 36+ cents per hour for AC. Fans do not cool rooms (they cool people), so turn them off when you leave. But when you're in a room, a fan can let you set the thermostat 3-4 degrees higher without sacrificing comfort.

Run appliances off-peak. On a TOU plan, running your dishwasher, laundry, and oven before 3 PM or after 8 PM (APS timing) saves real money. Consider batch-cooking or using a slow cooker instead of heating up the oven during peak hours.

Insulate aggressively. Arizona's extreme heat makes insulation even more valuable than in temperate climates. Attic insulation is critical — your roof absorbs enormous amounts of heat. Proper insulation can reduce energy bills by 30-50%, saving $600-1,200 annually. APS offers rebates: up to $400 for attic insulation, $500 for wall insulation, $450 for duct sealing (combined with insulation), and $200 for air sealing.

Monitor your usage in real time. A home energy monitor shows you exactly where your electricity is going and alerts you to unusual consumption patterns before they become bill shocks.

Pool Pump Optimization: An Arizona-Specific Win

About 40% of Arizona homes have swimming pools, and pool pumps are one of the biggest electricity hogs most homeowners overlook.

• Single-speed pump: Costs roughly $50/month to operate
• Variable-speed pump: Costs roughly $10/month — an 80% reduction

The physics are dramatic. Reducing pump speed by 50% decreases energy consumption by approximately 87%, thanks to the pump affinity laws. A variable-speed pump pays for itself in 12-24 months.

Beyond the pump upgrade, schedule your pump to run during off-peak hours (overnight on TOU plans) and use a pool cover to reduce evaporation by 40-50%, which also reduces the filtration load.

Solar in Arizona: Great Sun, Complicated Economics

Arizona is one of the top solar states in the country, with Phoenix averaging 299 sunny days per year. But the economics of rooftop solar have shifted significantly in recent years, and anyone considering panels needs to understand the current landscape.

Net Metering Is Gone — Net Billing Is Here

Arizona utilities no longer offer traditional net metering, which credited solar exports at the full retail rate. All three major utilities have transitioned to net billing, where the electricity you send back to the grid is credited at well below retail rates.

Homeowners who went solar before the transition to net billing are grandfathered for 20 years from their interconnection date. If you installed panels in 2020, your original net metering terms are safe until 2040.

For new solar customers, the economics now favor maximizing self-consumption — using your own solar power rather than exporting it. Every kWh you use directly from your panels saves you the full retail rate. Every kWh you export earns you only 30-50% of that. For a comprehensive look at panel options, see our solar panel buyer's guide.

Why Batteries Matter More Than Ever

With export rates so low, battery storage has become a crucial part of the solar equation in Arizona. A battery lets you store daytime solar production and use it during expensive peak evening hours instead of exporting it at a fraction of the value.

On SRP specifically, batteries are game-changing. For customers on plans with demand charges, a battery can reduce your demand charge from $80-110/month to $18-27/month by shaving your peak consumption. That demand charge reduction alone can justify the battery investment.

The 30% federal Investment Tax Credit applies to both solar panels and battery systems through 2032, then begins stepping down. For more on battery options and sizing, see our guide to the best solar batteries for home backup.

SRP and Solar: A Complicated Relationship

SRP's Customer Generation Plan for solar customers includes demand charges, which has drawn significant criticism from solar advocates. Solar panels help reduce summer demand (they produce during afternoon peak hours) but do almost nothing for winter demand, when peak hours fall before sunrise and after sunset.

SRP retired traditional net metering plans in November 2025. All new solar customers go on net billing with TOU pricing. If you're considering solar in SRP territory, modeling the demand charge impact is essential before you sign a contract.

Low-Income Assistance Programs

Arizona offers several programs to help households struggling with electricity costs:

APS Energy Support Program

• 25% discount (up to $95 off/month) for qualifying customers
• 60% discount (up to $165 off/month) for lower-income customers
• Eligibility: Gross monthly household income at or below 200% of federal poverty guidelines
• Medical program: Up to 35% or 60% discount for customers with life-threatening illnesses or medical equipment needs
• Bill assistance: Up to $500 through The Salvation Army partnership, available regardless of income through December 31, 2026

SRP Income-Qualified Discount

• $35/month credit for customers at 0-150% Federal Poverty Level (increased from $23 in November 2025)
• $10/month credit for customers at 151-200% FPL (new tier added November 2025)
• SRP contributes $5 million/year to bill assistance administered through Wildfire

Federal and State Programs

• LIHEAP: Heating/cooling benefits of $160-640 per year, plus up to $500 in crisis benefits. Income eligibility at 60% State Median Income. Arizona FY 2026 funding is $31.8 million. Apply through AZ Department of Economic Security: 1-866-494-1981.
• Power AZ: Expands LIHEAP eligibility to households up to 100% State Median Income, providing utility assistance beyond LIHEAP's income limits.
• Efficiency Arizona Program (launched February 2025): Up to $14,000 per household for energy upgrades including heat pumps, heat pump water heaters, insulation, air sealing, and electrical panel upgrades. Insulation and air sealing rebates go up to $1,600.

If you're exploring a full-home energy overhaul to permanently reduce your bills, our whole-home electrification guide outlines the process step by step.

Grid Reliability: Palo Verde and Arizona's Energy Future

Arizona's grid reliability story centers on one remarkable facility: the Palo Verde Nuclear Generating Station, the largest nuclear power plant in the United States.

Located about 50 miles west of Phoenix, Palo Verde's three pressurized water reactors produce a combined 3,810 MW of capacity — roughly 3.3 GW continuously. The plant generates about 32 million MWh annually, serving approximately 4 million people across Arizona, California, New Mexico, and Texas.

Palo Verde holds a unique distinction: it's the only nuclear plant in the world not located near a large body of water. Instead, it uses treated municipal sewage from the Phoenix metro area for cooling — an elegant solution for a desert location.

APS filed a Notice of Intent in March 2026 to seek a 20-year license extension that would keep the plant's three units operating through 2065-2067. Given that nuclear provides carbon-free baseload power running 24/7/365, the renewal is significant for both grid reliability and clean energy goals.

Arizona's Evolving Energy Mix

Beyond Palo Verde, Arizona's grid is diversifying:

• APS aims to add 6,000+ MW of solar and wind by 2027
• SRP is adding wind, solar, and battery storage to its generation portfolio
• Grid-scale battery storage is growing rapidly, capturing daytime solar production for use during evening peak hours
• Natural gas continues to provide peaking capacity for extreme demand days
• Coal plants are being phased out across the state
• All three major utilities are exploring additional nuclear generation, including small modular reactors (SMRs), and jointly applied for a DOE grant in 2025 to evaluate new nuclear sites

Arizona's peak electricity demand occurs in summer, and record-setting demand days are becoming more common. Grid stress is highest during extended heat waves with multiple consecutive days above 110 degrees. The combination of nuclear baseload, growing renewable capacity, and battery storage positions the grid reasonably well, though extreme events always carry risk.

Frequently Asked Questions

How much does electricity cost in Arizona?

The average residential rate is about 15 cents per kWh as of early 2026, roughly 10% below the national average. However, the average monthly bill is $160-164, which actually exceeds the national average because Arizona homes use significantly more electricity for air conditioning.

Why is my summer electricity bill so high?

Air conditioning accounts for up to 60% of summer electricity usage. Summer bills typically run $200-250/month for average homes and can reach $400-700+ for larger Phoenix homes. That's 2-3 times what you'll pay in winter. The combination of extreme heat (routinely 115+ degrees), monsoon humidity, and long cooling seasons makes Arizona summer bills among the highest in the country.

What is the difference between APS and SRP?

APS is an investor-owned utility regulated by the Arizona Corporation Commission. SRP is a quasi-governmental entity that sets its own rates through an elected board of directors. APS serves more customers statewide (1.4 million across 11 counties), while SRP serves most of metro Phoenix (970,000 customers across 3 counties). APS uses straightforward TOU pricing without demand charges on most plans. SRP has more complex pricing that may include demand charges, though they now offer non-demand TOU options.

What are demand charges and do I have to pay them?

Demand charges are based on your single highest period of electricity usage during peak hours in a billing cycle — measured in kilowatts (kW), not kilowatt-hours. SRP uses them on some plans, particularly the Customer Generation Plan for solar customers, where they can add $80-110/month. APS does not use demand charges on most standard residential plans. If you're on SRP, you can now choose TOU plans that do not include demand charges.

Is solar worth it in Arizona?

Arizona has some of the best solar resources in the country, but the economics have shifted. All utilities now use net billing rather than net metering, meaning exported solar power earns 3.7-6.3 cents per kWh — well below the 12-17 cents you pay at retail. Solar still makes financial sense, but the strategy has changed: maximize self-consumption of your solar power and consider adding battery storage. On SRP, a battery can reduce demand charges by $50-80/month, significantly improving the payback period. The 30% federal tax credit applies to both panels and batteries through 2032.

What time of day is electricity cheapest in Arizona?

Off-peak hours vary by utility. APS peak is 3-8 PM weekdays, so everything outside that window is cheaper. SRP's super off-peak runs 11 PM to 5 AM with the lowest rates. TEP peak is 3-7 PM weekdays. Weekends and holidays are typically off-peak for all utilities. Shifting major appliance usage to these cheaper windows is one of the simplest ways to lower your bill.

Are electricity rates going up in Arizona?

Yes. APS is seeking a 14% increase that could take effect in mid-2026, adding about $20/month for a typical customer. TEP is requesting a similar 14% increase for September 2026, adding $16-19/month. SRP's recent 2.4% increase was more modest, and the board approved a temporary 3% summer 2026 decrease. The APS and TEP increases are still pending ACC approval, and the Arizona Attorney General has signaled opposition to the APS request.

What low-income help is available for electricity bills?

Several programs exist. APS offers its Energy Support Program with 25-60% discounts (up to $165/month off) plus up to $500 in bill assistance through The Salvation Army. SRP provides an Income-Qualified Discount of $35/month for households at 0-150% Federal Poverty Level. The federal LIHEAP program offers $160-640/year plus crisis benefits. Power AZ extends help to households up to 100% State Median Income. The new Efficiency Arizona program can provide up to $14,000 for home energy upgrades. Call AZ Department of Economic Security at 1-866-494-1981 to start.

Your Arizona Electricity Action Plan

Here's a concrete plan to start lowering your electricity costs:

This week — know where you stand:

1. Log into your utility account (APS, SRP, or TEP) and pull your monthly usage history for the past 12 months. Note your summer peak months versus winter.
2. Identify which rate plan you're currently on. If you do not know, call your utility — this single piece of information determines everything else.
3. Compare your current plan to the alternatives. On APS, check whether Saver Choice (TOU without demand charges) beats your current plan. On SRP, look at the new super off-peak TOU plans launched in November 2025.

This month — shift your habits:

4. Program your thermostat to pre-cool your home during off-peak hours and let the temperature rise 3-4 degrees during peak. If you do not have a smart thermostat, this is the highest-impact upgrade you can make.
5. Move laundry, dishwashing, and cooking to off-peak hours (before 3 PM or after 8 PM on APS; check your specific plan for SRP and TEP).
6. If you have a pool, schedule your pump to run overnight. If you're still running a single-speed pump, get a quote for a variable-speed replacement — the $40/month savings means it pays for itself within two years.

Before summer hits:

7. Check your attic insulation. In Arizona's extreme heat, inadequate insulation is like leaving a window open. APS customers can get up to $400 in insulation rebates.
8. Install shade screens or exterior shading on west-facing windows. This is one of the most cost-effective cooling improvements for Arizona homes.
9. Check whether you qualify for the Efficiency Arizona program (up to $14,000 in rebates for energy upgrades) or any low-income assistance programs.

For longer-term savings:

10. If you're considering solar, get multiple quotes and make sure each one models your specific utility's net billing rates — not outdated net metering assumptions. Factor in battery storage, especially if you're on SRP with demand charges.
11. Consider a home energy monitor to identify hidden electricity drains and track whether your efficiency improvements are working.
12. Set calendar reminders to review your rate plan annually. Utilities update their offerings, and a plan that was best last year may not be best this year.

Arizona's electricity costs are manageable — but only if you're proactive. The difference between a homeowner who understands TOU pricing, shifts usage off-peak, and invests in basic efficiency upgrades versus one who runs everything during peak hours with poor insulation can easily be $1,000-2,000 per year. That is real money, and with summer rate increases coming from APS and TEP, it's worth claiming now.