For 2026, the sales tax rate in Charleston County, South Carolina stands at 9% — a combination of the 6% state rate and 3% local levy. The county's 408,235 residents make it an important market in the region.
For a $500 purchase in Charleston County, the sales tax would be $45.00, bringing the total to $545.00.
Business Compliance in Charleston County
Businesses must register with the South Carolina Department of Revenue to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 408,235, Charleston County offers significant market potential for businesses of all sizes.