Reverse Sales Tax Calculator

Have a receipt total but need to separate the sales tax from the item price? Enter the total paid and the tax rate to work backwards instantly.

Total Amount Paid ($)

Sales Tax Rate (%)

Or Select State Base Rate:

Pre-Tax Price

$0.00

Sales Tax Amount

$0.00

How the Reverse Tax Formula Works

To extract the pre-tax price from a total that already includes sales tax, you cannot simply multiply the total by the tax rate. You must use the reverse tax formula:

Pre-Tax Price = Total Paid / (1 + Decimal Tax Rate)

For example, if you paid $108.50 total and the tax rate is 8.5% (0.085):
$108.50 / 1.085 = $100.00 pre-tax price.