Free tool
US sales tax calculator
Add or remove US sales tax on an amount. There is no national rate: enter the combined state and local rate for the customer's location, using the state table as a starting point.
- Reference state rate
- 0%
- Local-rate range shown by source
- Use exact customer city/county/ZIP rate
Source table dated 2026-07-01. Use the state row to orient yourself, then enter the exact combined rate for the customer's city/county/ZIP. State and local rates can change monthly.
- Net
- $100.00
- sales tax Tax
- $0.00
- Gross
- $100.00
Add tax multiplies net by 1 + rate. Remove tax divides gross by 1 + rate.
Use this for invoice and checkout maths. It does not decide whether you must register, collect, or file.
Common questions
Why do I need the customer's exact location?
Local rates change by city, county and ZIP on top of the state rate. The table orients you by state; checkout systems should use an exact-rate lookup.
Does charging tax here mean I have nexus?
No. Whether you register, collect and remit in a state depends on economic-nexus thresholds and physical presence, which the threshold calculator and the free self-check outline.
The arithmetic is the last step. Whether you register and who collects the tax depends on channels, stock and imports, which the free self-check reviews market by market.
Start the free checkThis is a preliminary self-check, not tax advice. Decisions on registration, tax charging or collection, return filing and payment should be confirmed with a qualified professional. Questionnaire answers are used only to generate the result; see the Privacy Policy for details.