What is the sales tax in Round Rock city? - The sales tax in Round Rock city of Texas is 8.25% as of 2025. Use the Round Rock sales tax calculator to calculate the sales tax for any purchase in Round Rock.
Round Rock Sales Tax Calculator |
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| Amount: | $ |
| Sales Tax: | % |
| Before Tax Price | $25.00 |
|---|---|
| Sales Tax | $2.06 |
| Final Price | $27.06 |
Sales Tax By Zip Code | |
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Below is a list of the state sales tax, city sales tax, and county tax rate for Round Rock.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Williamson | Texas | Round Rock | 78664 | 6.25% | 1.5% | 0% | 8.25% |