12.73¢
per kWh, 2025
[ Columbia Power System / TN ]
Columbia Power System electricity rates in Tennessee
CITY SETS RATES · DATA 2025
change in average rate, 2024→2025
+6.1%
vs 2024
32,032
residential customers
+19.1%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Columbia Power System's average effective residential rate (12.73¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 10.14¢ | — | 21,999 |
| 2016 | 10.47¢ | +3.3% | 22,462 |
| 2017 | 10.85¢ | +3.6% | 23,198 |
| 2018 | 10.75¢ | −0.9% | 23,968 |
| 2019 | 10.84¢ | +0.8% | 24,914 |
| 2020 | 10.69¢ | −1.4% | 26,874 |
| 2021 | 10.99¢ | +2.8% | 27,949 |
| 2022 | 12.12¢ | +10.3% | 28,917 |
| 2023 | 11.91¢ | −1.7% | 30,374 |
| 2024 | 12.00¢ | +0.8% | 31,166 |
| 2025 | 12.73¢ | +6.1% | 32,032 |
How this compares
13.22¢
Tennessee average, 2025
−3.7%
Columbia Power System vs TN 2025 average
−26.1%
vs US 2025 average
#55
priciest in TN
Serves 2 counties in Tennessee: Maury, Williamson. 2 ZIP codes.
What the numbers show
Since 2015, Columbia Power System's average residential rate has gone from 10.14¢ to 12.73¢ per kWh: +25.5% over 10 years, or about +2.3% a year. It rose in 7 of the 10 years we can compare, and the biggest one-year increase was +10.3% in 2022. The largest drop was −1.7% in 2023.
For a home using 1,180 kWh a month, the Tennessee average, Columbia Power System's 2025 rate works out to about $1,803 a year, $69 less than at Tennessee's average rate of 13.22¢. Of the 87 Tennessee utilities in our data with a 2025 price, it is the 55th most expensive.
Columbia Power System served 21,999 homes in 2015 and 32,032 in 2025 (+45.6%), about 1% of Tennessee's residential electricity customers.
Who sets Columbia Power System's rates
Columbia Power System is a municipal utility owned by the local government. The city council or a local utility board sets its rates, usually after a public meeting, and the Tennessee Public Utility Commission generally does not.
Commission contact: Tennessee Public Utility Commission. How we calculate every figure on this page: methodology.
Questions
Is Columbia Power System raising rates in 2026?
Columbia Power System's rates are set by the city council or a local utility board, not through a rate case at the Tennessee Public Utility Commission, so check its own notices for a change this year. Its average residential rate moved +6.1% from 2024 to 2025.
What does Columbia Power System charge per kWh?
Columbia Power System's average effective residential rate was 12.73¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Tennessee's 2025 average was 13.22¢.
How much have Columbia Power System rates gone up in five years?
+19.1% between 2020 and 2025, against +22.7% for Tennessee as a whole over the latest five-year window.
How many customers does Columbia Power System have in Tennessee?
32,032 residential customers in 2025, across 2 counties including Maury, Williamson, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey, which every US utility files. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)