Quick example
Find 25% off an $80 item with 8.25% sales tax
A 25% discount saves $20, reducing the price from $80 to $60. Applying 8.25% tax to the discounted price adds $4.95, making the final price $64.95.
Two discount types
Percentage off versus fixed amount off
Percentage discount
Multiply the original price by the percentage divided by 100: price × (discount ÷ 100).
Fixed discount
Subtract the dollar amount directly: original price − fixed discount.
Amount saved
This is the discount itself. Sales tax is shown separately and does not reduce the reported savings.
Effective discount
For a fixed coupon, divide the amount saved by the original price to see its equivalent percentage discount.
Order of operations
Sales tax is applied after the discount
This calculator first subtracts the discount, then calculates the entered tax percentage from the reduced price. For example, 8% tax on a $75 discounted price is $6, not $8 based on an original $100 price.
Check local rules
The taxable price can vary
Tax treatment can depend on the jurisdiction, product, seller-funded promotion, manufacturer coupon, and included fees. Enter the rate that applies to the purchase and treat this result as an estimate when the discount's taxable treatment is uncertain.
Common questions
Discount calculator FAQ
How do I calculate a percentage discount?
Multiply the original price by the discount percentage divided by 100, then subtract that amount from the original price.
How do I calculate a fixed discount?
Subtract the fixed amount directly from the original price. The discount cannot be larger than the original price.
Is sales tax calculated before or after the discount?
This calculator applies tax after the discount. Actual taxable amounts can vary by local law and promotion type.
Can a 100% discount make the final price zero?
Yes. It reduces the discounted price to zero, and this calculator therefore reports zero tax and a zero final price.