13.47¢
per kWh, 2025
[ Duke Energy Carolinas / SC ]
Duke Energy Carolinas electricity rates in South Carolina
NO RATE CASE ON FILE · DATA 2025
change in average rate, 2024→2025
−3.7%
vs 2024
582,062
residential customers
+17.3%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Duke Energy Carolinas's average effective residential rate (13.47¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 11.10¢ | — | 470,818 |
| 2016 | 11.01¢ | −0.8% | 478,509 |
| 2017 | 10.58¢ | −3.9% | 487,693 |
| 2018 | 10.83¢ | +2.4% | 495,483 |
| 2019 | 11.48¢ | +6.0% | 505,717 |
| 2020 | 11.48¢ | +0.0% | 517,863 |
| 2021 | 11.14¢ | −3.0% | 530,414 |
| 2022 | 11.55¢ | +3.7% | 540,420 |
| 2023 | 12.67¢ | +9.7% | 554,253 |
| 2024 | 13.99¢ | +10.4% | 568,586 |
| 2025 | 13.47¢ | −3.7% | 582,062 |
How this compares
15.12¢
South Carolina average, 2025
−10.9%
Duke Energy Carolinas vs SC 2025 average
−21.8%
vs US 2025 average
#23
priciest in SC
Serves 19 counties in South Carolina: Abbeville, Anderson, Cherokee, Chester, Edgefield, Fairfield, Greenville, Greenwood, Kershaw, Lancaster, Laurens, McCormick, Newberry, Oconee, Pickens, Saluda, Spartanburg, Union, York. 194 ZIP codes.
What the numbers show
Since 2015, Duke Energy Carolinas's average residential rate has gone from 11.10¢ to 13.47¢ per kWh: +21.4% over 10 years, or about +2.0% a year. It rose in 5 of the 10 years we can compare, and the biggest one-year increase was +10.4% in 2024. The largest drop was −3.9% in 2017.
For a home using 1,066 kWh a month, the South Carolina average, Duke Energy Carolinas's 2025 rate works out to about $1,723 a year, $211 less than at South Carolina's average rate of 15.12¢. Of the 29 South Carolina utilities in our data with a 2025 price, it is the 23rd most expensive.
Duke Energy Carolinas served 470,818 homes in 2015 and 582,062 in 2025 (+23.6%), about 22% of South Carolina's residential electricity customers.
Who sets Duke Energy Carolinas's rates
Duke Energy Carolinas is investor-owned, so it can change its base rates only by filing a rate case with the Public Service Commission of South Carolina. The commission holds hearings and takes public comment before it rules, and it usually approves less than the company asks for. Fuel and other pass-through charges can change between rate cases.
Commission contact: Public Service Commission of South Carolina. How we calculate every figure on this page: methodology.
Questions
Is Duke Energy Carolinas raising rates in 2026?
No rate case for Duke Energy Carolinas is on file with the Public Service Commission of South Carolina in our tracker. Its average residential rate moved −3.7% from 2024 to 2025. We check the commission docket monthly.
What does Duke Energy Carolinas charge per kWh?
Duke Energy Carolinas's average effective residential rate was 13.47¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). South Carolina's 2025 average was 15.12¢.
How much have Duke Energy Carolinas rates gone up in five years?
+17.3% between 2020 and 2025, against +22.8% for South Carolina as a whole over the latest five-year window.
How many customers does Duke Energy Carolinas have in South Carolina?
582,062 residential customers in 2025, across 19 counties including Abbeville, Anderson, Cherokee, 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)