| Missouri | 4.225% |
| St. Louis County | 2.263% |
| City + District Rates Range | 1.75% – 5.50% |
| Combined Sales Tax Rates Range | 8.238% – 11.988% |
Businesses are required to collect sales tax in St. Louis County if they have a sales tax nexus in Missouri and sell to residents of St. Louis County, whether at a physical location within the county or online.
Physical Nexus: This occurs when a business has a tangible presence in the state. Examples include having a store, warehouse, office, or employees in Missouri if your business operates any of these within the state, you have a physical nexus and must collect sales tax from customers in St. Louis County. Economic Nexus: This is based on the volume of sales or number of transactions a business conducts in the state. For instance, if your business exceeds a certain threshold of sales or transactions in Missouri which is often defined as a specific dollar amount or number of transactions, you establish economic nexus. This means even if you don’t have a physical presence in the state, you are still required to collect sales tax from customers in St. Louis County.
