Duke Energy Carolinas, LLC Electricity Rates and Average Bill (South Carolina)
Data through June 2026 (the latest month EIA has published) · Updated September 04, 2026
As of June 2026, Duke Energy Carolinas, LLC's residential customers in South Carolina paid an average effective rate of 13.87¢/kWh with an average monthly bill of $163.41, per EIA Form 861-M data. That rate is 1.7¢ below the South Carolina average of 15.55¢/kWh; the U.S. average is 18.34¢/kWh.
Rate trend vs the South Carolina average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| July 2025 | 12.88 | 197.90 | 1537 |
| August 2025 | 13.56 | 152.23 | 1123 |
| September 2025 | 13.83 | 124.44 | 900 |
| October 2025 | 14.02 | 105.98 | 756 |
| November 2025 | 13.90 | 120.89 | 870 |
| December 2025 | 13.48 | 164.63 | 1221 |
| January 2026 | 13.78 | 190.66 | 1384 |
| February 2026 | 14.56 | 157.00 | 1078 |
| March 2026 | 13.52 | 111.49 | 825 |
| April 2026 | 15.07 | 114.30 | 758 |
| May 2026 | 14.49 | 130.34 | 900 |
| June 2026 | 13.87 | 163.41 | 1179 |
Duke Energy Carolinas, LLC vs South Carolina vs the U.S.
| Duke Energy Carolinas, LLC | South Carolina | U.S. average | |
|---|---|---|---|
| Rate (June 2026) | 13.87¢/kWh | 15.55¢/kWh | 18.34¢/kWh |
| Average monthly bill | $163.41 | $185.87 | $170.65 |
| Average monthly usage | 1179 kWh | 1195 kWh | 930 kWh |
| Rate change, 1 year | +6.7% | +5.1% | +5.0% |
Estimate a bill at Duke Energy Carolinas, LLC rates
Worked example: 1,000 kWh at Duke Energy Carolinas, LLC's average effective rate of 13.87¢/kWh is about $138.70. The utility's actual average usage is 1179 kWh/month, which produces the $163.41 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full South Carolina rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.