Sales Tax Calculator
Find the total price including sales tax, or work back from a receipt total to the price before tax. Enter the state rate and any local (county or city) rate separately; the calculator combines them for you.
Calculate sales tax
Sales tax formulas
Add sales tax
Tax = price × (state% + local%) ÷ 100 · Total = price + taxReverse from a total
Pre-tax price = total ÷ (1 + combined rate ÷ 100)Don’t subtract the percentage from the total; divide by 1 plus the rate.
Worked examples
- Combined rate = 8.25%
- Tax = 49.99 × 0.0825 = 4.12; total = 54.11
- Pre-tax = 108.88 ÷ 1.08875 = 100.00; tax = 8.88
State-level sales tax base rates
| State | State rate | Local taxes? |
|---|---|---|
| California | 7.25% | Yes, district taxes |
| Texas | 6.25% | Yes, up to 2% |
| New York | 4% | Yes (NYC total 8.875%) |
| Florida | 6% | Yes, county surtax |
| Illinois | 6.25% | Yes |
| Washington | 6.5% | Yes |
| Alaska, Delaware, Montana, New Hampshire, Oregon | No state sales tax | Alaska and Montana allow some local tax |
Local rates differ by county and city and change during the year. Check your state revenue department’s lookup tool for the exact combined rate at an address.
Frequently asked questions
How do I calculate sales tax?
Multiply the price by the combined tax rate as a decimal. 80 at 6.5% is 80 × 0.065 = 5.20 tax, 85.20 total.
How do I find the price before tax?
Divide the total by 1 plus the rate. 107.25 at 7.25% is 107.25 ÷ 1.0725 = 100.
Is shipping taxable?
It depends on the state. Some tax shipping charges when they are part of the sale; others don’t. Check your state’s rules.
Related calculators
Rates shown are for general information and can change; verify with the relevant tax authority.