Sales tax calculator
Enter your own combined rate (state + local). This tool does not know jurisdiction tables — it is math only, not filing advice.
- Subtotal
- $100.00
- Tax (8.25%)
- $8.25
- Total charged
- $108.25
Key takeaways
- Two modes: add tax to subtotal or peel tax out of a total.
- You supply the combined rate — we do not guess your city.
- Rounded to cents for simple invoices and quotes.
- Pair with your real tax engine before filing.
- All calculations stay in the browser.
Who built this
ContractorHQ is edited by Bernard Guido — 25+ years in trade operations and software. These utilities follow the same quality bar as our reviews: fast pages, honest disclosure, and tools that stay useful without selling your data.
Frequently asked questions
Where are the state tables?
Not here on purpose. Rates change by city and quarter. You paste the combined percent you already looked up from your accountant or state site.
Is this legal tax advice?
No. It is arithmetic. Filing, exemptions and use tax still need a CPA or your compliance team.
Reverse mode math?
We solve total = subtotal × (1 + r/100) for subtotal when you type a tax-included total.
Currency?
Display uses a dollar sign for familiarity; numbers are unitless — swap the symbol in your head if you bill in other currencies.