# Reverse Sales Tax Calculator

Use this simple reverse sales tax calculator to determine your pre-tax price or amount. Simply enter the final price, or after-tax amount, and either the sales tax amount or the sales tax rate to see your results.

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$What is the after-tax amount? Enter either the sales tax amount in dollars (e.g. 20 for$20) or the sale tax rate (e.g. 8 for 8%)
Pre-tax amount
$92.59 Amount before tax Sales tax$7.41
8% sales tax rate
Final price
$100 After-tax amount Calculations Pre-tax amount = After-tax amount ÷ (1 + Sales tax rate) =$100 ÷ (1 + 8%)
= $92.59 Sales tax = Pre-tax amount x Sales tax rate =$92.59 x 8%
= $7.41 ## How to use this calculator This reverse sales tax calculator will calculate your pre-tax price or amount for you. You will need to input the following: • Final price: Enter the final price or amount. This is the after-tax amount. • Sales tax amount or rate: Enter either the sales tax amount in dollars (such as 10 for$10) or the sales tax rate (such as 8.5 for 8.5%0. Choose which one you are using in the drop-down menu.

Based on your inputs, the reverse sales tax calculator will determine what your pre-tax price or amount is.

• Pre-tax amount: This is the price or amount before any sales tax.
• Sales tax: This is the sales tax amount. For example, if an item costs $100, and the sales tax rate is 8%, then the sale tax is$8.
• Sales tax rate: This is the sales tax rate, which is a percentage to the pre-tax amount.
• Final price: The final price is the after-tax amount and includes the sales tax.

## How do you find the original price before tax?

### Using sales tax rate (percent)

If you know the final price and the sales tax rate, the formula for calculating the pre-tax price is:

Pre-tax price = Final price ÷ (1 + Sales tax rate)

For example, if the final price of an item is $25 and the sales tax rate is 9%, then the pre-tax price is: Pre-tax price = Final price ÷ (1 + Sales tax rate) =$25 ÷ (1 + 9%)
= $23.15 ### Using sales tax amount If you know the final price and the sales tax amount in dollars, then the formula for calculating the pre-tax price is: Pre-tax price = Final price − Sales tax amount For example, if the final price of an item is$25 and the sales tax amount is $8, then the pre-tax price is: Pre-tax price = Final price − Sales tax amount =$25 − $2 =$13

To calculate the sales tax rate, you would use the following equation:

Sales tax rate = Sales tax amount ÷ Pre-tax price

In the above example, the sales tax rate would be $2 ÷$16 = 8.7%.