Sales Tax Calculator - St. Charles County (Missouri)
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Sales tax calculator to help you calculate tax amount and total amount. It gives you taxable amount, tax and total amount in St. Charles County.
Tax Calculation
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The different sales tax rates like state sales tax, county tax rate and city tax rate in St. Charles County are 4.23%, 1.73% and 1.92%. Check sales tax rates by cities in St. Charles County
What is St. Charles County sales tax rates in 2025?
St. Charles County sales tax rates in Oct 2025 are:
| State Tax Rate | 4.23% |
| County Tax Rate | 1.73% |
| City Tax Rate | 1.92% |
| Special Tax Rate | 1.00% |
| Combined Tax Rate | 7.54% |
Which city has highest sales tax rates in St. Charles County?
List of cities with highest sales tax rates in St. Charles County:
- Cottleville - 8.95%
- Flinthill - 8.45%
- Wentzville - 8.45%
- Saint Peters - 7.95%
- O Fallon - 7.95%
- Lake Saint Louis - 7.95%
- New Melle - 7.95%
- Saint Charles - 7.70%
- West Alton - 6.95%
- Portage Des Sioux - 6.95%
Which city has lowest sales tax rates in St. Charles County?
List of cities with lowest sales tax rates in St. Charles County:
- Foristell - 5.95%
- Augusta - 5.95%
- Defiance - 5.95%
- West Alton - 6.95%
- Portage Des Sioux - 6.95%
- Saint Charles - 7.70%
- Saint Peters - 7.95%
- O Fallon - 7.95%
- Lake Saint Louis - 7.95%
- New Melle - 7.95%
Sales Tax Rates by city - St. Charles County (Missouri)
| CITY | COMBINED RATE | STATE RATE | COUNTY RATE | CITY RATE | SPECIAL RATE |
|---|---|---|---|---|---|
| Foristell | 5.95% | 4.23% | 1.73% | 0.00% | 0.00% |
| Flinthill | 8.45% | 4.23% | 1.73% | 2.50% | 0.00% |
| Saint Charles | 7.70% | 4.23% | 1.73% | 2.00% | 1.00% |
| Augusta | 5.95% | 4.23% | 1.73% | 0.00% | 0.00% |
| Cottleville | 8.95% | 4.23% | 1.73% | 2.00% | 1.00% |
| Wentzville | 8.45% | 4.23% | 1.73% | 2.50% | 0.00% |
| West Alton | 6.95% | 4.23% | 1.73% | 1.00% | 0.00% |
| Saint Peters | 7.95% | 4.23% | 1.73% | 2.00% | 0.00% |
| Defiance | 5.95% | 4.23% | 1.73% | 0.00% | 0.00% |
| Portage Des Sioux | 6.95% | 4.23% | 1.73% | 1.00% | 0.00% |
| O Fallon | 7.95% | 4.23% | 1.73% | 2.00% | 0.00% |
| Lake Saint Louis | 7.95% | 4.23% | 1.73% | 2.00% | 0.00% |
| New Melle | 7.95% | 4.23% | 1.73% | 2.00% | 0.00% |