How to use this tool
Enter the original price and each successive discount percentage.
Enter your applicable tax rate separately. The result applies tax after the discounts and shows the combined discount.
Sale price = original × (1−discount1) × (1−discount2)
Worked example
$77.76 · total after tax
Fixed example using the settings below. Monetary examples use USD; dates and times use their stated reference values. This example stays unchanged when you edit your calculation.
Example inputs
- Original price: 100
- First discount (%): 20
- Second discount (%): 10
- Entered tax rate (%): 8
Method illustration: 20% then 10% off 100 gives 72 before tax, a combined 28% discount.
Assumptions and limits
- Successive discounts multiply; percentages do not simply add. Tax is applied after discounts.
Check or report a result
Check the units, selected calculation and assumptions first. Compare the fixed example above with your inputs to identify what changed.
Report a calculation issue with the page address, hypothetical inputs, result displayed and result expected. Do not include passwords, bank details or other private information.