Sales tax by street address.
Get the combined rate, jurisdiction breakdown, and source. Published government data, through one open-source API. See sources
or try one
One address, every part of its rate, and the line that decided it.
-
Resolved by street address
One ZIP can cross several tax boundaries. We use state address ranges and geographic boundaries to resolve your street address.
-
Sources you can check
Each answer names the published data used. Rates carry effective dates; historical coverage varies by state.
-
Clear when it’s uncertain
When the evidence cannot settle one rate, we explicitly decline the lookup. Missing data is never treated as zero.
What it doesn’t do. OpenTaxRate gives the general sales tax rate at an address. It doesn’t decide whether a product is taxable, apply exemptions or holidays, choose sourcing rules, or file returns, so it is a rate lookup, not a replacement for a compliance service.
Why boundaries matter: Stripe’s engineering team shows how two houses in the same ZIP can face different taxes. Read their explanation ↗
Measured against official answers.
Random addresses in every state, each checked against the state’s own published rate. Development benchmark, 2026-10-23.
- addresses matched the state’s rate.
- 5,301/5,317
- wrong rates*
- 4
- declined lookups
- 12
- per 1,000 lookups. Free without a key.
- $1.95
2 of the 4 in Missouri.