Missouri sales tax Calculator
Missouri has one of the most complex sales tax structures in the US — a modest 4.225% state rate that balloons significantly once city, county, and special district taxes are layered on top, pushing combined rates in Kansas City and St. Louis above 10% in some zip codes.
This calculator is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional for your specific situation. Rates last verified May 2026.
Verify rates on May 2026How it's calculated
Start with the purchase price: $20,000.00
Multiply by the combined tax rate to get the tax amount: $1,644.00
Add tax to the purchase price for the total amount due: $21,644.00
Missouri sales tax rates by county
| Location | Combined rate |
|---|---|
| St. Louis City | 10.49% |
| Jackson County (Kansas City) | 10.25% |
| St. Louis County | 7.86% |
| Greene County (Springfield) | 8.22% |
| Clay County (North KC) | 8.25% |
| Jefferson County | 6.72% |
| Boone County (Columbia) | 7.56% |
| Cass County | 6.72% |
Common examples in Missouri
Based on county rates shown above. Select your county in the calculator for a precise result.
Used car purchase
$12,000.00 purchase
$986.40
tax owed
New car purchase
$28,000.00 purchase
$2,301.60
tax owed
Electronics (laptop)
$1,000.00 purchase
$82.20
tax owed
Home appliance
$600.00 purchase
$49.32
tax owed
Missouri tax-free weekends
Shop during these periods and pay no sales tax on qualifying items.
Back-to-School Sales Tax Holiday
First Friday–Sunday of August (3 days)Clothing $100 or less per item, school supplies $50 or less per purchase, computer software $350 or less, personal computers and peripherals $1,500 or less