South Carolina electricity rates
129 residential tariffs from 37 utilities. Across the 30 filed since 2020, the median costs $0.1585 per kWh at 1,000 kWh a month once fixed charges are included — the cheapest $0.1244, the most expensive $0.1865.
$0.1585median $/kWh
37utilities
129tariffs on file
40%time-of-use
27%filed since 2020
Rate structures in South Carolina
| Structure | Tariffs |
|---|---|
| Tiered | 39 |
| Flat | 38 |
| Time-of-use | 32 |
| Time-of-use + tiered | 20 |
Lowest effective rates at 1,000 kWh/month
Ranked across the 30 tariffs filed since 2020 — 27% of those on file here. Older filings are excluded because they are systematically below what utilities now charge; see methodology. Effective rate includes fixed charges, and availability restrictions may apply.
| Utility | Tariff | Structure | Filed | $/kWh | Annual |
|---|---|---|---|---|---|
| Berkeley Electric Coop Inc | Residential Time of Day | Time-of-use | 2025 | $0.1244 | $1,493.10 |
| Duke Energy Carolinas, LLC | RETC (Residential Service All-Electric Time of Use with Critical Peak Pricing)) | Time-of-use | 2026 | $0.1244 | $1,492.98 |
| Duke Energy Carolinas, LLC (South Carolina) | Residential Service Energy Star All-Electric ES | Tiered | 2025 | $0.1293 | $1,552.24 |
| Duke Energy Carolinas, LLC | ES (Residential Service Energy Star, All-Electric) | Time-of-use + tiered | 2026 | $0.1296 | $1,555.17 |
| Duke Energy Carolinas, LLC | RSTC (Residential Service Time of Use with Critical Peak Pricing) | Time-of-use | 2026 | $0.1314 | $1,577.00 |
| Duke Energy Carolinas, LLC | RE (Residential Electric Water Heating and Space Conditioning) | Time-of-use + tiered | 2026 | $0.1354 | $1,625.05 |
| Duke Energy Carolinas, LLC | ES (Residential Service Energy Star, Standard) | Flat | 2026 | $0.1354 | $1,625.09 |
| Duke Energy Carolinas, LLC (South Carolina) | Residential Electric Water Heating and Space Conditioning - RE | Tiered | 2025 | $0.1361 | $1,633.08 |
| Duke Energy Carolinas, LLC (South Carolina) | Residential Service Energy Star Standard ES | Tiered | 2025 | $0.1391 | $1,669.81 |
| Duke Energy Carolinas, LLC | RS (Residential Service) | Flat | 2026 | $0.1416 | $1,698.66 |