How it works
Add sales tax
Tax = pre-tax price × rate ÷ 100, rounded to the nearest cent. Total = pre-tax + tax. Example: $100 in California at the 7.25% statewide rate → tax $7.25, total $107.25.
Remove sales tax
When you know the tax-inclusive total: pre-tax = total ÷ (1 + rate ÷ 100), rounded to the cent; tax = total − pre-tax. Example: $107.25 at 7.25% → pre-tax $100.00, tax $7.25.
State vs local rates
Each state option applies that state’s 2026 statewide sales tax rate. Tick “Include average local sales tax” to also add the Tax Foundation population-weighted average local rate for that state (midyear 2026). Your city or county may be higher or lower than the average — use Custom rate when you know the exact combined rate on your receipt. Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax; Alaska still allows local sales taxes.
Frequently asked questions
What is the sales tax rate in my city?
Statewide rates are listed here. Cities and counties often add local option taxes. The optional average local rate is a population-weighted statewide average from Tax Foundation — not your exact ZIP. For the precise combined rate, check your state DOR lookup or the rate printed on a local receipt, then enter it as a custom rate.
Is sales tax charged on the discounted price?
In most U.S. states, yes — tax applies to the sale (discounted) price. Use our Discount Calculator to apply percent-off first, then bring the sale price here.
Which states have no sales tax?
Delaware, Montana, New Hampshire and Oregon have neither state nor local general sales taxes. Alaska has no statewide rate but many localities levy local sales taxes.
Sources
- Tax Foundation: State and Local Sales Tax Rates, Midyear 2026 (as of July 1, 2026)
- Tax Foundation: State and Local Sales Tax Rates, January 1, 2026