St. Charles County
•
Missouri (MO)
17 ZIP Code
St. Charles County, MO Sales Tax Rates 2026
2026 sales tax rate guide for St. Charles County, MO. Average combined tax rate is 7.42% with local jurisdictions ranging up to 8.45%.
Average Combined Rate
7.42%
Estimated Tax Range: 5.95% - 8.45%
⚡ Direct Tax Answer & Key Takeaway
As of 2026, the local county sales tax rate in St. Charles County (Missouri) is 1.73%. Combined sales tax rates across cities in this county range from 5.95% to 8.45% (averaging 7.42%).
County Tax
1.73%
Average Combined Rate
7.42%
Max Local Rate
8.45%
Indexed Cities
13
Cities & Towns in St. Charles County
| City | Combined Sales Tax Rate | Action |
|---|---|---|
| St. Charles | 7.95% | View Tax Rates → |
| Lake St. Louis | 7.95% | View Tax Rates → |
| Dardenne Prairie | 8.45% | View Tax Rates → |
| Cottleville | 7.95% | View Tax Rates → |
| St. Paul | 5.95% | View Tax Rates → |
| Foristell | 7.95% | View Tax Rates → |
| Flint Hill | 6.95% | View Tax Rates → |
| West Alton | 6.95% | View Tax Rates → |
| New Melle | 7.95% | View Tax Rates → |
| Portage Des Sioux | 6.95% | View Tax Rates → |
| Augusta | 7.45% | View Tax Rates → |
| Weldon Spring Heights | 5.95% | View Tax Rates → |
| Defiance | 5.95% | View Tax Rates → |
📋 State Tax Rules & Compliance Guide
Sourcing Rule:
Destination-based
Groceries & Food:
Exempt (0% Tax)
Clothing & Apparel:
Taxable at standard rate
SaaS & Digital Goods:
Non-Taxable
Economic Nexus Threshold:
$100,000 in sales or 200 separate transactions
Official Tax Authority:
Missouri Department of Revenue ↗
Interactive Sales Tax Calculator
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ZIP Codes in St. Charles County
❓ Frequently Asked Questions
Key questions and answers regarding sales tax rates, exemptions, and compliance.