Reverse Sales Tax Calculator
Enter the total price you paid (including tax) and the sales tax rate to back out the pre-tax price.
Reverse Sales Tax Calculator
Find the pre-tax price and tax amount from a total price that already includes sales tax.
This is an estimate for general informational purposes only, not tax advice. It assumes a single flat tax rate applied to the entire amount.
A reverse sales tax calculation starts from a tax-included total and works backward to find the original price and the tax amount — useful when a receipt only shows the final total, or when comparing prices across regions with different tax rates.
Example
- With the default values shown above, this calculator returns: Pre-Tax Price ≈ USD 100.00; Tax Amount ≈ USD 7.00.
Frequently Asked Questions
How is this different from a normal sales tax calculator?
A normal sales tax calculator starts from the pre-tax price and adds tax. This one works in reverse, starting from the tax-included total to find the original price.
Does this work for any tax rate or currency?
Yes — enter whatever sales tax, VAT or GST rate applies in your case, and use your local currency for the amount.