South Carolina Electricity Rates and Average Bill
Data through June 2026 (the latest month EIA has published) · Updated September 04, 2026
As of June 2026, the average residential electricity rate in South Carolina is 15.55¢/kWh (the 21st-lowest in the U.S.) and the average monthly bill is $185.87, per EIA data. That rate is 2.8¢ below the U.S. average of 18.34¢/kWh.
Rate trend, last three years
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| July 2025 | 14.70 | 222.05 | 1510 |
| August 2025 | 14.98 | 188.35 | 1257 |
| September 2025 | 15.34 | 156.83 | 1022 |
| October 2025 | 15.65 | 129.85 | 830 |
| November 2025 | 15.53 | 128.49 | 827 |
| December 2025 | 14.82 | 167.20 | 1128 |
| January 2026 | 15.41 | 197.59 | 1282 |
| February 2026 | 16.15 | 183.11 | 1134 |
| March 2026 | 16.45 | 134.78 | 819 |
| April 2026 | 17.06 | 131.28 | 770 |
| May 2026 | 16.18 | 148.05 | 915 |
| June 2026 | 15.55 | 185.87 | 1195 |
South Carolina vs the U.S. average
| South Carolina | U.S. average | |
|---|---|---|
| Rate (June 2026) | 15.55¢/kWh | 18.34¢/kWh |
| Average monthly bill | $185.87 | $170.65 |
| Average monthly usage | 1195 kWh | 930 kWh |
| Rate change, 1 year | +5.1% | +5.0% |
| Rate change, 5 years | +20.2% | +32.6% |
South Carolina's average residential rate of 15.55¢/kWh for June 2026 ranks 21st of 51 (1 = lowest). Over the past year the rate moved +5.1% (South Carolina) versus +5.0% nationally; over five years, +20.2% versus +32.6% nationally. Average usage of 1195 kWh/month compares with 930 kWh nationally, which is why the bill and rate ranks can differ. For how South Carolina's recent increase ranks against every other state (12-month, 3-year and 5-year changes), see electricity rate increases by state.
Largest utilities in South Carolina
Average effective rates and bills for South Carolina's largest utilities, from EIA Form 861-M (June 2026). Or find yours by ZIP code.
| Utility | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) | Residential customers |
|---|---|---|---|---|
| Dominion Energy South Carolina, Inc | 16.83 | 201.94 | 1,200 | 719,006 |
| Duke Energy Carolinas, LLC | 13.87 | 163.41 | 1,179 | 594,264 |
| South Carolina Public Service Authority | 13.64 | 148.89 | 1,092 | 190,586 |
| Duke Energy Progress | 15.28 | 197.48 | 1,293 | 144,432 |
| Berkeley Electric Coop Inc | 16.09 | 216.79 | 1,347 | 121,475 |
| Palmetto Electric Coop Inc | 15.17 | 186.73 | 1,231 | 71,325 |
Average bill = rate × average usage. Utilities with similar rates can show very different average bills because their customers' average usage differs (housing mix, heating fuel, climate).
Estimate a bill at South Carolina rates
Worked example: 1,000 kWh at South Carolina's average rate of 15.55¢/kWh is about $155.50. The state's actual average usage is 1195 kWh/month, which is what produces the $185.87 average bill. These are average effective rates including all charges; your utility's tariff will differ.
Wondering what's behind rising rates nationally? See Why is my electric bill so high?, our data-led explainer on demand growth, data centers, and grid costs. Also: South Carolina gas prices and why they are what they are, and the cheapest way to heat a home by fuel and state.
Source: EIA retail sales data (residential sector, monthly), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. We do not project unpublished months. See methodology.