12.73¢
per kWh, 2025
[ Columbia Power System / TN ]
Columbia Power System electricity rates in Tennessee
NO RATE CASE ON FILE · 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.
Questions
Is Columbia Power System raising rates in 2026?
No rate case for Columbia Power System is on file with the Tennessee Public Utility Commission in our tracker. Its average residential rate moved +6.1% from 2024 to 2025. We check the commission docket monthly.
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; rate-case facts are from the Tennessee Public Utility Commission docket linked on this page. 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)