Tri-County Electric Coop, Inc (SC) electricity rates in South Carolina, 2025
Tri-County Electric Coop, Inc (SC)’s 17,670 residential customers paid an average of 19.94¢ per kWh in 2025, 32% above the South Carolina average of 15.12¢. The typical home used 1,131 kWh a month, for an average bill of $225.
- 19.94¢avg ¢/kWh (2025)+1.43¢ (+7.7%) vs 2024
- $225Avg monthly billSouth Carolina: $161
- 1,131 kWhAvg monthly useSouth Carolina: 1,066 kWh
- 17,670Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 17,670 | 239,799 | $47,814,000 | 19.94¢ | 18.51¢ | +1.43¢ (+7.7%) |
| Commercial | 541 | 44,107 | $7,200,000 | 16.32¢ | 16.06¢ | +0.26¢ (+1.6%) |
| Industrial | 277 | 23,303 | $2,938,000 | 12.61¢ | 11.17¢ | +1.44¢ (+12.9%) |
| All sectors | 18,488 | 307,209 | $57,952,000 | 18.86¢ | 17.51¢ | +1.35¢ (+7.7%) |
How Tri-County Electric Coop, Inc (SC) compares
- South Carolina residential average, 2025: 15.12¢ per kWh, 1,066 kWh a month, $161 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 28 full-service utilities in South Carolina with at least 1,000 residential customers, Tri-County Electric Coop, Inc (SC) ranks 28 of 28 from lowest to highest average price.
- Latest monthly figure: South Carolina homes paid 15.76¢ per kWh in August 2026 (preliminary), against 15.16¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average rose 7.7%; the state average rose 6.2%.
- Tri-County Electric Coop, Inc (SC) is an electric cooperative, owned by the members it serves; its board sets rates. Balancing authority: SC.
Where Tri-County Electric Coop, Inc (SC) serves
EIA lists 6 South Carolina counties in its 2025 service territory: Calhoun, Kershaw, Lexington, Orangeburg, Richland, Sumter.
20 ZIP codes are matched to Tri-County Electric Coop, Inc (SC) in NREL’s 2024 ZIP file: 29018, 29030, 29044, 29047, 29048, 29052, 29053, 29059, 29061, 29112, 29115, 29118, 29125, 29135, 29142, 29148, 29160, 29163, 29209, 29448. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
South Carolina full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| Santee Electric Coop, Inc | 16.39¢ | $211 | 35,356 |
| Dominion Energy South Carolina, Inc | 16.41¢ | $169 | 712,679 |
| Mid-Carolina Electric Coop Inc | 16.83¢ | $195 | 57,067 |
| Newberry Electric Coop, Inc | 17.06¢ | $172 | 13,215 |
| Broad River Electric Coop, Inc | 17.16¢ | $185 | 23,660 |
| Aiken Electric Coop Inc | 17.51¢ | $192 | 50,850 |
| Edisto Electric Coop, Inc | 18.99¢ | $228 | 15,540 |
| Blue Ridge Electric Coop Inc (SC) | 19.82¢ | $198 | 68,647 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.
All South Carolina electricity providers · How we compute rates