Duke Energy Carolinas, LLC Electricity Rates and Average Bill (South Carolina)
Data through July 2026 (the latest month EIA has published) · Updated October 13, 2026
As of July 2026, Duke Energy Carolinas, LLC's residential customers in South Carolina paid an average effective rate of 13.98¢/kWh with an average monthly bill of $202.09, per EIA Form 861-M data. That rate is 1.5¢ below the South Carolina average of 15.47¢/kWh; the U.S. average is 18.31¢/kWh.
Rate trend vs the South Carolina average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| 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 |
| July 2026 | 13.98 | 202.09 | 1446 |
Duke Energy Carolinas, LLC vs South Carolina vs the U.S.
| Duke Energy Carolinas, LLC | South Carolina | U.S. average | |
|---|---|---|---|
| Rate (July 2026) | 13.98¢/kWh | 15.47¢/kWh | 18.31¢/kWh |
| Average monthly bill | $202.09 | $232.00 | $212.44 |
| Average monthly usage | 1446 kWh | 1499 kWh | 1160 kWh |
| Rate change, 1 year | +8.5% | +5.2% | +4.9% |
Estimate a bill at Duke Energy Carolinas, LLC rates
Worked example: 1,000 kWh at Duke Energy Carolinas, LLC's average effective rate of 13.98¢/kWh is about $139.80. The utility's actual average usage is 1446 kWh/month, which produces the $202.09 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.