Round Rock Sales Tax Calculator
The combined sales tax rate in Round Rock, Texas is 8.25% in 2026 — a 6.25% Texas state rate plus 2% in local add-ons. That is the 437th lowest rate of the 1210 Texas cities we track, and it runs above Texas's 8.2% average. On a $100 purchase that's $8.25 in tax for a $108.25 total.
$100.00 total
Before tax: $100.00 · Sales tax: $0.00 (0%)
State & average combined rates: Tax Foundation 2026. Local rates vary by city/county — adjust the rate for an exact figure. How we calculate →
How Round Rock's 8.25% sales tax rate breaks down
Round Rock's combined 8.25% rate is built from: 6.25% Texas state rate + 2% city rate. Texas caps combined local sales tax at 2% on top of the 6.25% state rate, for a statewide ceiling of 8.25% — Round Rock sits right at that cap.
The city portion funds Round Rock directly, while any remaining local share funds county or special-purpose districts where they apply. Source: Texas Comptroller, city rates data.
Round Rock vs the rest of Texas
At 8.25%, Round Rock runs above Texas's 8.2% statewide average combined rate by 0.05%. Among the 1210 Texas cities we track by combined rate, Round Rock ranks the 437th lowest.
That puts Round Rock on the higher end for Texas — worth double-checking against the official lookup tool if you're quoting a price to a customer or filing a return.
Sales tax examples in Round Rock
At Round Rock's 8.25% combined rate:
$100 → $8.25 tax, $108.25 total · $1,000 → $82.50 tax, $1,082.50 total · $25,000 car purchase → $2,063 tax, $27,063 total.
Working backwards: a $1,080.00 receipt total in Round Rock means the pre-tax price was $997.69 and $82.31 was tax — use “Remove tax” mode above to reverse any total instantly.
A note on Round Rock's exact rate
The 8.25% rate applies within Round Rock's official city limits as published by Texas Comptroller — Sales Tax Rate Locator. Addresses with a Round Rock mailing address but outside the incorporated city line — a common situation on the edges of any city — can fall under a different, usually lower, rate.
For an address-exact rate, use the official lookup tool: Texas Comptroller — Sales Tax Rate Locator. This calculator pre-fills the published city-limits rate as a reliable starting point.
Round Rock sales tax — frequently asked questions
What is the sales tax rate in Round Rock, Texas?
Round Rock's combined sales tax rate is 8.25% in 2026 — 6.25% Texas state tax plus 2% in local add-ons. That's the 437th lowest rate of the 1210 Texas cities we track.
How much is sales tax on $100 in Round Rock?
At Round Rock's 8.25% rate, sales tax on a $100 purchase is $8.25, for a $108.25 total.
How much sales tax will I pay on a $25,000 car in Round Rock?
At Round Rock's 8.25% combined rate, sales tax on a $25,000 vehicle purchase is about $2,063, for a $27,063 total before any trade-in credit or registration fees.
Is Round Rock's sales tax higher or lower than the Texas average?
Round Rock runs above Texas's 8.2% statewide average by 0.05%, ranking the 437th lowest of the 1210 Texas cities we track.
How do I calculate sales tax backwards from a total in Round Rock?
Divide the total by 1 plus the rate. A $1,080.00 total in Round Rock works back to a $997.69 pre-tax price and $82.31 of tax. Use “Remove tax” mode above to do this automatically.
Does Round Rock's sales tax rate apply everywhere in the Round Rock area?
The 8.25% rate applies within Round Rock's official city limits. Nearby addresses outside the incorporated boundary can be taxed at a different rate — check Texas Comptroller — Sales Tax Rate Locator for an address-exact figure.
Compare nearby cities in Texas
See all 1210 Texas cities ranked by combined sales tax rate, or compare:
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →