Salt River Project (SRP) electric rates and bills
Salt River Project's 1,074,095 residential customers in Arizona paid an average of 13.98¢ per kWh in 2025, for an average bill of $159.71 a month on 1,143 kWh.1 Over the last 12 months (Sep 2025–Aug 2026) the average was 14.05¢, and 13.82¢ in August 2026.2
EIA-861 2025 final (released October 7, 2026) and EIA's monthly utility survey through August 2026 (preliminary); next monthly update expected November 24, 2026. Averages are revenue divided by kWh, all charges included: not the rate printed in a tariff.
3 of 15 Arizona counties served (EIA-861 2025)
Salt River Project's 1,074,095 residential customers paid an average of 13.98¢ per kWh in 2025, 8.4% below the Arizona average, while APS customers in the same metro area paid 17.03¢ per kWh1. A third of SRP's residential customers are on a time-of-use plan, and over the last 12 months August use per home was about three times February's.
SRP's average price, and what it covers
SRP is a public power utility: a political subdivision of the State of Arizona that runs the Salt River Project's water and power operations around Phoenix, rather than an investor-owned company. In 2025 its residential customers paid 13.98¢ per kWh on average, the 3rd lowest of the 12 Arizona utilities with 10,000 or more residential customers and 3.5% below the national average for public power1. The average is revenue divided by kWh across all residential price plans, so it includes monthly service charges and time-of-day differences.
Over the last 12 months (September 2025 to August 2026) SRP's residential average was 14.05¢ per kWh; in August 20263 alone it was 13.82¢ per kWh, −2.7%2 against the same month a year earlier.
Source: EIA-861M monthly sales and revenue by utility; EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Residential revenue divided by kWh in each month, as reported to EIA's monthly survey (EIA-861M; months since January 2026 preliminary).
Show the numbers
| Month | Salt River Project (¢/kWh) | kWh per customer | Bill per customer |
|---|---|---|---|
| January 2025 | 12.41¢ | 914 | $113.43 |
| February 2025 | 13.12¢ | 670 | $87.91 |
| March 2025 | 12.91¢ | 752 | $97.05 |
| April 2025 | 13.71¢ | 822 | $112.69 |
| May 2025 | 14.44¢ | 1,137 | $164.20 |
| June 2025 | 14.30¢ | 1,590 | $227.32 |
| July 2025 | 14.62¢ | 1,880 | $274.89 |
| August 2025 | 14.21¢ | 1,977 | $280.91 |
| September 2025 | 14.01¢ | 1,517 | $212.48 |
| October 2025 | 14.24¢ | 962 | $136.98 |
| November 2025 | 14.05¢ | 742 | $104.26 |
| December 2025 | 13.93¢ | 754 | $105.09 |
| January 2026 | 13.88¢ | 782 | $108.55 |
| February 2026 | 14.37¢ | 656 | $94.23 |
| March 2026 | 13.39¢ | 955 | $127.85 |
| April 2026 | 13.90¢ | 924 | $128.50 |
| May 2026 | 13.84¢ | 1,209 | $167.38 |
| June 2026 | 14.01¢ | 1,665 | $233.32 |
| July 2026 | 14.76¢ | 1,944 | $286.94 |
| August 2026 | 13.82¢ | 2,041 | $282.07 |
SRP or APS: set by the address
Phoenix-area homes are served by either SRP or Arizona Public Service, and the difference in what their customers pay is large. In 2025, APS residential customers paid 17.03¢ per kWh on average and SRP's 13.98¢ per kWh; Tucson Electric Power, the third large utility, 14.88¢ per kWh1. EIA's service-territory records list 134 distribution utilities in Maricopa County alone, so a city or ZIP code is not enough to know which one serves a home: SRP's and APS's own service-area maps decide by address.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | average residential price (bundled customers) |
|---|---|
| Salt River Project (AZ) | 13.98¢ |
| Tucson Electric Power (AZ) | 14.88¢ |
| APS (AZ) | 17.03¢ |
Bills are closer than prices because SRP homes use more electricity: 1,143 kWh a month on average in 2025, against 966 kWh for APS. SRP's average bill was $159.71, APS's $164.541.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | average monthly residential bill |
|---|---|
| Tucson Electric Power (AZ) | $116.62 |
| Salt River Project (AZ) | $159.71 |
| APS (AZ) | $164.54 |
The summer peak dominates
Air conditioning took 36% of household electricity in Arizona in EIA's 2020 household survey, against 19%5 nationally, and Arizona's population lives with one of the highest cooling loads in the country (2,655 cooling degree days a year on average, 3rd highest6 among the 48 contiguous states). SRP's monthly data show the effect: use per home rose from 656 kWh in February 2026 to 2,041 kWh in August 2026, and the average bills in those two months were $94.23 and $282.072.
Source: EIA-861M monthly sales and revenue by utility. kWh per residential customer in each month (EIA-861M; months since January 2026 preliminary). The table adds the average bill and price for the month.
Show the numbers
| Month | kWh per customer | Bill per customer | ¢/kWh |
|---|---|---|---|
| September 2025 | 1,517 | $212.48 | 14.01¢ |
| October 2025 | 962 | $136.98 | 14.24¢ |
| November 2025 | 742 | $104.26 | 14.05¢ |
| December 2025 | 754 | $105.09 | 13.93¢ |
| January 2026 | 782 | $108.55 | 13.88¢ |
| February 2026 | 656 | $94.23 | 14.37¢ |
| March 2026 | 955 | $127.85 | 13.39¢ |
| April 2026 | 924 | $128.50 | 13.90¢ |
| May 2026 | 1,209 | $167.38 | 13.84¢ |
| June 2026 | 1,665 | $233.32 | 14.01¢ |
| July 2026 | 1,944 | $286.94 | 14.76¢ |
| August 2026 | 2,041 | $282.07 | 13.82¢ |
A bill that fell while the price rose
From 2024 to 2025, SRP's residential average price rose 3.9%, from 13.46¢ per kWh to 13.98¢ per kWh. The average bill went the other way, from $162.97 to $159.71 (−2.0%), because use per home fell from 1,211 kWh7 to 1,143 kWh1 a month. Annual use in Arizona moves with the summer's heat, so a milder or hotter summer can outweigh a price change in either direction.
Time-of-use and rooftop solar
In 2025, 360,908 SRP residential customers, 33.6% of the total, were on a time-of-use plan, about three times the US share of 11.3% on time-varying rates, made possible by advanced meters at 99.9% of homes. Rooftop solar is common too: 63,437 net-metered residential installations (59.1 per 1,000 customers) with 435.4 megawatts8 of capacity. SRP publishes its current price plans and their peak hours on its website; the time-of-use guide explains how such plans change a bill.
Few outages
SRP customers averaged 66 minutes without power in 2025, including major events (fewer than the Arizona average of 74 minutes), and 50 minutes excluding them, with 1.02 interruptions per customer. Arizona as a whole ranked 3rd lowest among the states on outage minutes (74 minutes9).
Business customers
SRP's commercial customers paid 10.85¢ per kWh on average in 2025, and its few dozen industrial accounts 8.36¢ per kWh. Across all customers the average was 11.83¢ per kWh1. For the state picture, see electricity in Arizona.
Where Salt River Project serves
Source: EIA-861 2025, service territory; Census Bureau, Cartographic boundary file, counties. EIA-861 2025 service territory: 3 counties. Counts whole counties even where the utility serves only part of one; check the utility's own service-area map for an address.
Show the numbers
| County | Other utilities reporting service |
|---|---|
| Gila County | APS, Navopache Electric Cooperative, USBIA-San Carlos Project, WAPA-- Western Area Power Administration |
| Maricopa County | APS, City of Mesa, USBIA-San Carlos Project, Tohono O'Odham Utility Authority, Gila River Indian Utility Authority (GRICUA), Town of Wickenburg, Ocotillo Water Conserv. Dist., Buckeye Water C&D District, Harquahala Valley Power District, Maricopa County M W C Dist #1, Electrical Dist No8 Maricopa, WAPA-- Western Area Power Administration |
| Pinal County | APS, Trico Electric Cooperative, Electrical Dist No3 Pinal County, USBIA-San Carlos Project, Electrical Dist No2 Pinal County, Tohono O'Odham Utility Authority, Electrical Dist No4 Pinal County, Gila River Indian Utility Authority (GRICUA), Hohokam Irr & Drain Dist, Ak-Chin Electric Utility Authority, WAPA-- Western Area Power Administration |
Questions and answers
How much does SRP charge per kWh?
On average, 13.98¢ per kWh1 for residential customers in 2025, all charges included, and 14.05¢ per kWh2 over the last 12 months (September 2025 to August 2026). Individual price plans differ by season and time of day; the average covers all of them.
Is SRP cheaper than APS?
On average, yes: in 2025 SRP's residential customers paid 13.98¢ per kWh and APS's 17.03¢ per kWh1. You cannot choose between them, though: each serves its own territory, and Maricopa County is split among 134 utilities.
What is the average SRP electric bill?
$159.71 a month in 2025 for 1,143 kWh1, slightly lower than in 2024 because homes used less. In EIA's monthly data the average was $282.07 in August 2026, the month of highest use, and peaked at $286.94 in July 20262.
Related pages
Sources
- EIA-861 annual electric power industry report, 2025 final; table Sales_Ult_Cust_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861M monthly sales and revenue by utility; table sales_ult_cust_2025 and _2026; released October 23, 2026. www.eia.gov
- EIA, Electric Power Monthly / EIA-861M sales and revenue by state; table sales_revenue.xlsx (EPM Table 5.6.A); January 2001 to 2026-08; months since January 2026 preliminary; released October 23, 2026. www.eia.gov
- EIA-861 2025, service territory; table Service_Territory_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA, Residential Energy Consumption Survey 2020, state data; table CE4.1.EL.ST, CE5 state tables, state highlights; released June 28, 2023. www.eia.gov
- NOAA, Climate Prediction Center population-weighted degree days by state; table daily state files, base 65°F; 2016-2025 annual sums; 1981-2010 CPC normals; released November 13, 2026. ftp.cpc.ncep.noaa.gov
- EIA-861 annual electric power industry report, 2024 final; table Sales_Ult_Cust_2024; 2024, final (file updated December 3, 2025); released December 3, 2025. www.eia.gov
- EIA-861 2025, advanced meters, dynamic pricing and net metering; table Advanced_Meters, Dynamic_Pricing, Net_Metering 2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, reliability; table Reliability_2025; 2025, final; released October 7, 2026. www.eia.gov
- Census Bureau, Cartographic boundary file, counties; table cb_2025_us_county_5m; cb_2021_us_county_5m; 2025 (2021 for Connecticut). www.census.gov
How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.