States › Arizona › Tucson Electric Power Co
investor-owned utility · EIA utility 24211
Tucson Electric Power Co
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.
In its Form EIA-861 filing for 2024, Tucson Electric Power Co, an investor-owned utility, reported 412,747 residential customers in Arizona, with a service territory that touches 2 counties.
Its average residential price that year was 15.63¢ per kilowatthour, 4.8% above the Arizona average of 14.91¢ and 5.2% below the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.
That works out to an average residential bill of $125.10 a month on average use of 800 kWh a month. Across Arizona the average bill was $160.24 on 1,075 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.
For reliability it reported a SAIDI of 113.2 minutes per customer with major event days included and 68.4 minutes with them excluded, calculated under IEEE 1366 standard. The median among Arizona utilities reporting was 113.2 minutes with major event days; this utility's figure is about the same as that median.
The average price is up 28.2% on 2019, against up 20.0% for Arizona as a whole, and up 4.4% on 2023.
Compared with Arizona, the US and other investor-owned utilities
| Measure, 2024 | This utility | Investor-owned utilities, US median | Arizona | United States |
|---|---|---|---|---|
| Average residential price per kWh | 15.63¢ | 16.17¢ | 14.91¢ | 16.48¢ |
| Average monthly residential bill | $125.10 | $131.47 | $160.24 | $142.26 |
| Average monthly use, kWh | 800 | 787 | 1,075 | 863 |
| Residential price change, 1 year | +4.4% | — | +6.3% | +3.0% |
| Residential price change, 5 years | +28.2% | — | +20.0% | +26.7% |
| SAIDI, all events (minutes) | 113.2 | 278.7 | 113.2 median | 184.5 median |
| SAIDI, without major event days | 68.4 | 106.5 | 80.9 median | 99.8 median |
State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. Among the 5 filings by investor-owned utilities in Arizona, the median price was 15.63¢. In Arizona this utility's price ranks 6 of 19, counting from the highest.
Average price by year
Tucson Electric Power CoArizona averageUS average
Year by year
| Year | ¢ per kWh | Arizona ¢ | Monthly bill | kWh a month | Residential customers | All sales |
|---|---|---|---|---|---|---|
| 2024 | 15.63¢ | 14.91¢ | $125.10 | 800 | 412,747 | 9 TWh |
| 2023 | 14.97¢ | 14.02¢ | $121.53 | 812 | 407,394 | 9 TWh |
| 2022 | 13.73¢ | 13.02¢ | $110.12 | 802 | 403,028 | 8.8 TWh |
| 2021 | 13.40¢ | 12.54¢ | $106.94 | 798 | 398,938 | 8.7 TWh |
| 2020 | 12.37¢ | 12.27¢ | $108.95 | 881 | 394,673 | 9.1 TWh |
| 2019 | 12.19¢ | 12.43¢ | $96.94 | 796 | 387,409 | 8.7 TWh |
| 2018 | 12.58¢ | 12.77¢ | $102.42 | 814 | 385,414 | 8.9 TWh |
| 2017 | 12.05¢ | 12.44¢ | $99.64 | 827 | 381,556 | 8.9 TWh |
| 2016 | 11.13¢ | 12.15¢ | $91.16 | 819 | 378,992 | 8.9 TWh |
| 2015 | 11.51¢ | 12.13¢ | $94.87 | 824 | 376,439 | 9.1 TWh |
| 2014 | 11.00¢ | 11.90¢ | $91.30 | 830 | 374,203 | 9.2 TWh |
| 2013 | 10.37¢ | 11.71¢ | $90.10 | 869 | 370,879 | 9.3 TWh |
Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12.
Month by month
Tucson Electric Power CoArizona average
Sales by sector, 2024
| Sector | Customers | Sales | Share of sales | Revenue | ¢ per kWh, bundled |
|---|---|---|---|---|---|
| Residential | 412,747 | 4 TWh | 44% | $619,593,900 | 15.63¢ |
| Commercial | 41,903 | 2 TWh | 22% | $306,959,000 | 15.58¢ |
| Industrial | 558 | 3 TWh | 34% | $302,414,000 | 9.98¢ |
| Transportation | 1 | 284 MWh | 0% | $51,100 | — |
Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 15.7 TWh in total, of which 81.2% was its own net generation and 3 TWh was bought wholesale; summer peak demand 2,764 MW.
Reliability
Minutes of sustained interruption per customer in 2024, as the utility reported them under IEEE 1366 standard. SAIFI: 0.99 interruptions per customer with major event days, 0.85 without; CAIDI 114.2 minutes per interruption. EIA's Arizona total across all reporting utilities was 87.5 minutes with major event days and 72.0 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.
| Year | SAIDI, all events | SAIDI, no major events | SAIFI, all events | SAIFI, no major events | Method |
|---|---|---|---|---|---|
| 2024 | 113.2 | 68.4 | 0.99 | 0.85 | IEEE 1366 |
| 2023 | 168.7 | 61.9 | 0.98 | 0.73 | IEEE 1366 |
| 2022 | 68.8 | — | 0.80 | — | IEEE 1366 |
| 2021 | 102.1 | — | 0.91 | — | IEEE 1366 |
| 2020 | 60.0 | — | 0.71 | — | IEEE 1366 |
| 2019 | 54.4 | — | 0.70 | — | IEEE 1366 |
| 2018 | 51.4 | 0.0 | 0.78 | 0.00 | IEEE 1366 |
| 2017 | 72.5 | 7.4 | 0.97 | 0.05 | IEEE 1366 |
| 2016 | 89.2 | 65.1 | 1.13 | 0.91 | IEEE 1366 |
| 2015 | 59.4 | 59.4 | 0.74 | 0.74 | IEEE 1366 |
| 2014 | 57.1 | 57.1 | 0.71 | 0.71 | IEEE 1366 |
| 2013 | 80.8 | 63.5 | 0.73 | 0.68 | IEEE 1366 |
Generation at plants it operates, 2025
- Coal 70.3% 5.5 TWh
- Natural gas 21% 1.6 TWh
- Wind 7% 550.8 GWh
- Solar 1.3% 101.2 GWh
- Petroleum 0.4% 28.4 GWh
Net generation of 7.8 TWh at power plants this utility operates, from Form EIA-923. It is not the mix delivered to customers: utilities also buy power wholesale (3 TWh in 2024), sell generation to others and may co-own plants that another company operates.
Counties in its service territory
Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.
Other utilities in Arizona
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Arizona Public Service Co | Investor-owned | 1,256,120 | 16.45¢ | $170.02 | 87.2 | 80.9 |
| UNS Electric, Inc | Investor-owned | 95,191 | 16.02¢ | $147.96 | 72.4 | 60.1 |
| Morenci Water and Electric | Investor-owned | 2,232 | 11.23¢ | $88.36 | — | — |
| Salt River Project | Public power district | 1,053,407 | 13.46¢ | $162.97 | 58.1 | 52.8 |
| Trico Electric Cooperative Inc | Cooperative | 52,450 | 14.17¢ | $133.48 | 150.2 | 83.2 |
| Sulphur Springs Valley E C Inc | Cooperative | 46,008 | 13.49¢ | $100.12 | 138.3 | 124.7 |
| Navopache Electric Coop, Inc | Cooperative | 41,569 | 13.47¢ | $81.64 | — | — |
| Mohave Electric Cooperative, Inc. | Cooperative | 41,009 | 11.20¢ | $110.45 | 170.8 | 117.8 |
All Arizona utilities · Investor-owned utilities nationwide
Questions and answers
How much does electricity cost from Tucson Electric Power Co?
Residential customers paid an average of 15.63¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.
How does that compare with Arizona?
The Arizona average residential price in 2024 was 14.91¢ and the US average 16.48¢; Tucson Electric Power Co was 4.8% above the state figure. Among 19 utility filings with a bundled residential price in Arizona, it had the 6th highest.
What is the average Tucson Electric Power Co bill?
$125.10 a month in 2024, on average residential use of 800 kWh a month (annual revenue and sales divided by customers and by twelve). The Arizona average was $160.24 on 1,075 kWh.
How reliable is Tucson Electric Power Co service?
It reported 113.2 minutes of interruption per customer (SAIDI) including major event days and 68.4 minutes excluding them, with 0.99 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.
Is the Tucson Electric Power Co price rising?
The average residential price was up 4.4% in 2024 compared with 2023 and up 28.2% compared with 2019.
Which counties does Tucson Electric Power Co serve?
Its Form EIA-861 service territory lists 2 counties: Cochise County, AZ and Pima County, AZ. A county can appear in several utilities' territories.
Provenance
Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Tucson Electric Power Co", utility number 24211. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. Generation by fuel is from Form EIA-923, 2025 final. All are US government works in the public domain. Page built 30 Sep 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.