South Carolina Electricity Cost Calculator

Homes in South Carolina paid an average of 15.64¢ per kilowatt-hour from August 2025 to July 2026, 13% below the U.S. average of 17.99¢. That is the 26th-highest of 51, between Texas (15.96¢) and Oregon (15.50¢).

The average South Carolina home used 1,057 kWh a month — the 10th-most of the 51 — so its typical bill came to $165 a month, the 13th-highest. At the national rate the same 1,057 kWh would cost $25 more a month.

In July 2026, the latest month published, the South Carolina rate was 15.47¢.

At 15.64¢ per kWh, every extra 100 kWh a month adds $15.64 to the monthly bill and $188 to the year. The table runs from half to twice the South Carolina average home's 1,057 kWh, using the same calculation as the calculator above.

The average South Carolina home's bill peaked at about $232 in July 2026 and was lowest, about $128, in November 2025. Use ran from 770 kWh in April 2026 to 1,499 kWh in July 2026, 1.9 times as much.

The rate moved too, from 14.82¢ in December 2025 to 17.06¢ in April 2026. A monthly rate includes that month's fuel and seasonal charges, which is why the calculator uses the 12-month average for a yearly estimate.

Among the 10 largest providers listed, average residential rates in 2024 ran from 11.38¢ at South Carolina Public Service Authority to 18.94¢ at Blue Ridge Electric Coop Inc. On the average South Carolina home's 1,057 kWh that is a difference of $80 a month.

These are 2024 figures, the latest final year. The South Carolina average was 14.23¢ that year and 15.64¢ over the last 12 months, up 10% — compare the providers with each other, not with today's average.

Together they serve 80% of South Carolina's 2,581,882 residential customers. The rates are each company's residential revenue divided by kilowatt-hours sold, so customer charges are included; a plan or tier can still differ.