Live Data: April 2026
Lake St. Louis, MO Sales Tax Rate 2026
Sales tax information for Lake St. Louis, Missouri.
Lake St. Louis Sales Tax Breakdown
Rate data is being processed for Lake St. Louis.
Which County Is Lake St. Louis In?
Lake St. Louis falls within St. Charles, Missouri. St. Charles imposes a 1.700% county-level sales tax in addition to the Missouri state base rate.
Business Nexus in Missouri
Economic Nexus Threshold
Selling into Missouri from out of state? Once you exceed
$100,000 in annual sales or
200 transactions,
you must register and collect Missouri sales tax.
FAQ: Lake St. Louis Sales Tax
The combined sales tax rate in Lake St. Louis, Missouri is N/A% as of 2026.
Multiply your purchase price by N/A% to find the tax owed. A $500 purchase would include $N/A in sales tax.
Groceries are generally taxable in Missouri. Check the official Department of Revenue for specific exemptions.
Vehicle purchases in Lake St. Louis are subject to the N/A% combined rate, though some states apply different rules for vehicle sales. Verify with the Missouri Department of Revenue or DMV.
Register for a sales tax permit through the official Missouri Department of Revenue website. Registration is typically free and required before collecting any sales tax.
Official Tax Authority
Missouri Department of Revenue
Filing Deadline: Monthly returns due the last day of the following month. File via MyTax Missouri.