Finance

Percentage Discount with Tax & Reverse

Enter an original price and a discount percentage to get the sale price, savings, and after-tax total. Reverse mode finds the original price when you only know the marked-down figure.

How to use
  1. Enter the original price and the discount percentage.
  2. Add a sales tax rate for the after-tax total.
  3. Switch to reverse mode to recover the original price from a sale price.
Markdown
Final sale price
$75.00

$25.00 off a $100.00 ticket

You save
$25.00
Original price
$100.00
Tax added
$0.00
Total with tax
$75.00
Estimates for general information, not financial advice. Confirm figures before making money decisions.
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How it's calculated

sale = price × (1 − d), total = sale × (1 + t)

price = original price, d = markdown rate, t = sales-tax rate (as decimals), sale = discounted price, total = after-tax price. Reverse mode recovers the original: price = sale ÷ (1 − d).

Common questions

How does reverse mode work?

It takes the marked-down price and the discount percentage and divides back out to recover the original price.

Is tax added before or after the discount?

Tax is applied to the discounted price, matching the way US stores ring up sales.

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