State sales tax
4.2%, cities add up to 2% more
South Dakota starts at a 4.2% state rate, which is unusually precise next to most states' round numbers. Cities can add up to 2% more by ordinance, changeable only each January 1 or July 1, and some also add a separate 1% charge on alcohol, restaurants and lodging, which is why Sioux Falls and Rapid City commonly land around 6.0% to 6.2% combined while unincorporated areas pay just the 4.2% base. Storeveu inherits the state rate across every store in South Dakota and lets you set the municipal add-on per location, so a chain with stores inside and outside city limits does not need a separate build for each.