Method
How to calculate final price
Discount is applied before tax. If local rules tax the original price or include tax in the displayed price, revise the inputs accordingly.
FORMULAFinal price = original price × (1 − discount) × (1 + tax)
Worked example
Discount and final-price calculator example
A 20% discount reduces $250 to $200 before an 8.25% tax is applied.
Change one assumption at a time to see what drives the result. The output is an estimate, not a quote, forecast or recommendation.
FAQ
Discount and final-price calculator FAQ
Is tax always calculated after discount?
Rules vary. This model applies tax to the discounted subtotal.
Can I stack two discounts?
Run them sequentially; two 10% discounts equal 19% overall, not 20%.
Does this include shipping or fees?
No. Add them to the final amount separately if applicable.