Williamsville, Missouri sales tax rate: 8.475%
Last updated Checked monthly
The sales tax rate in Williamsville, Missouri is 8.475%. That’s the 4.225% state rate plus 4.25% in local taxes. It’s higher than 204 of the 228 Missouri cities we checked, and 5 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Williamsville combined rate
8.475%
- Missouri state
- 4.225%
- Wayne CountyCounty
- 1.75%
- WilliamsvilleCity
- 2.5%
Williamsville sales tax calculator
Enter a price and what you’re selling.
- MissouriState · 4.225%$4.23
- Wayne CountyCounty · 1.75%$1.75
- Williamsville City (Wayne County)City · 2.5%$2.50
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoWilliamsville sales tax rate breakdown
State, county and city taxes add up to 8.475%.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Missouri | State | 4.225% |
| Wayne County | County | 1.75% |
| Williamsville City (Wayne County) | City | 2.5% |
| Combined rate | 8.475% |
Rate history
- July 20237.475%
- July 20248.475%
- July 20258.475%
- July 20268.475%
- Today8.475%
Changed since July 2023.
Charge the right rate in Williamsville, on every order.
Zamp calculates tax at each customer’s address, then files and pays every Missouri return for you, with a sales tax team you can call.
Williamsville sales tax questions.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
What is the sales tax rate in Williamsville, Missouri?
The combined sales tax rate in Williamsville is 8.475% as of November 2, 2026. It’s made up of 4.225% Missouri state tax, 1.75% Wayne County, 2.5% Williamsville City (Wayne County).
Does the sales tax rate vary within Williamsville?
Williamsville has no special-district taxes, so most addresses in the city pay the same 8.475%: Missouri’s 4.225% plus 1.75% county tax plus 2.5% city tax. This rate was calculated for the centre of Williamsville; the calculator prices any exact address.
Is SaaS taxable in Williamsville?
No.
Do online sellers have to collect sales tax in Williamsville?
Yes, if they have nexus in Missouri: more than $100,000 in Missouri sales in the previous or current calendar year, or a physical presence in the state. They register with the Missouri Department of Revenue and charge the rate at the buyer’s address.
Sources. Missouri Department of Revenue · Zamp Sales Tax API, for the centre of Williamsville. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
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