Formulas
- Total = price × (1 + rate)
- Price before tax = total ÷ (1 + rate)
Sales tax calculator
- Methodology & sources
- Runs in your browser
Add sales tax to a price, or find the pre-tax price from a total, with your combined state and local rate.
Total with tax
$107.25
- Price before tax
- $100.00
- Sales tax
- $7.25
- Total with tax
- $107.25
Enter the combined rate for your location: the state rate plus county and city rates. Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire and Oregon.
Total with tax
Frequently asked questions
How do I calculate sales tax?
Multiply the price by the combined sales tax rate: $100 at 7.25% is $7.25 of tax, $107.25 in total. To find the price before tax, divide the total by 1 + the rate.
Which states have no sales tax?
Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax, although some Alaska localities charge one.
Why is my rate higher than the state rate?
Counties, cities and special districts add their own rates on top of the state rate. Your combined rate depends on the exact address of the sale.