Reverse Sales Tax Calculator
Find the pre-tax price from a tax-included total.
Enter your values
ⓘ Live results
Results
- Pre-tax price
- $100.00
- Sales tax amount
- $7.50
- Total paid
- $107.50
Quick answer
The pre-tax price equals the total paid divided by one plus the tax rate.
Pre-tax price = total / (1 + tax rate)
How to use the Reverse Sales Tax Calculator
- 1Enter the total amount you paid, including tax.
- 2Enter the sales tax rate that applied.
- 3Read the original pre-tax price and the tax portion of your total.
Worked example
Using the values the calculator loads with:
Inputs
- Total price paid (tax included)107.50 $
- Sales tax rate7.5 %
Results
- Pre-tax price$100.00
- Sales tax amount$7.50
- Total paid$107.50
Frequently asked questions
When is this useful?
Handy for expense reports, reimbursements, or figuring out a receipt that only shows the final total.
Does this handle multiple tax rates (state + local)?
Yes — just enter the combined total sales tax rate that applied to the purchase.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.