The Austin Combined Sales Tax Calculator applies Austin’s full 8.25% rate to any purchase and shows exactly where the money goes. Texas has no state income tax but leans on sales tax, and the headline rate is built from three layers stacked together. This tool computes the tax on a pre-tax price, extracts the tax hidden inside a tax-inclusive total, and respects the most common Texas exemptions so groceries and prescriptions are not over-taxed.
How it works
Austin’s rate is a sum of jurisdiction layers: 6.25% Texas state, 1% City of Austin and
1% transit/county, totaling 8.25%. In forward mode the tool computes
tax = price x 0.0825 and total = price + tax. In reverse mode it treats your amount as
tax-inclusive and recovers the base with base = total / 1.0825, then tax = total - base.
Item type controls the rate. Taxable goods use the full 8.25%. Common Texas exemptions — unprepared groceries and prescription/qualifying OTC medicine — are set to 0%, matching Texas Comptroller rules. The breakdown then splits the total tax back into its state, city and transit components so you can see each share.
Tips and example
A $100 taxable purchase generates $6.25 state, $1.00 city and $1.00 transit tax — a
$8.25 total tax and a $108.25 grand total. Run the same $108.25 through reverse mode and
the tool returns the $100.00 base and $8.25 embedded tax.
Remember 8.25% is the Austin city-limit and Texas maximum rate. Special districts can differ, so verify the precise jurisdiction for high-value or business purchases.