Rapid City Sales Tax Rate — Economic Context & Calculation
Tourism (Mount Rushmore, Crazy Horse Memorial, Custer State Park — 5M+ annual visitors), military (Ellsworth AFB — 6,000+ personnel), mining (Black Hills gold/hardrock), healthcare (Monument Health), education (SD School of Mines), retail hub for western SD
The combined sales tax rate in Rapid City is 6.200%, composed of the South Dakota state rate of 4.200% plus a local portion of 2.000%. On a receipt, that stacks up as: 4.2% state rate + 2% City of Rapid City rate = 6.2% combined. Groceries are fully taxable in South Dakota at the combined rate — one of the few states with no grocery break; a 2024 ballot measure to exempt them failed. No state income tax. Ellsworth AFB-related purchases may have federal tax exemptions.
The formula to calculate sales tax for any purchase:
For a $150.00 purchase in Rapid City: tax is $9.30 ($150.00 × 0.06200), total is $159.30.
