Discount Calculator
See exactly how much you save. Pick a discount, add taxes if needed, done.
$
%
$0.00You save
$0.00Final price
Original price$0.00
Discount (20%)$−0.00
Final price$0.00
How the Discount Calculator Works
Enter the original price and select a discount percentage using the preset pills (10%, 15%, 20%, 25%, 30%, 50%) or type a custom value. The calculator instantly shows how much you save and the final price after the discount.
Toggle the tax option to add Québec taxes (GST 5% + QST 9.975% = 14.975%) on top of the discounted price — useful when shopping in stores that apply taxes after discounts.
Frequently Asked Questions
How is the discount calculated?
Savings = original price × (discount % / 100). Final price = original price − savings. For example, a 20% discount on $80 saves you $16, leaving a final price of $64.
Are taxes applied before or after the discount?
In Québec (and Canada generally), taxes are applied on the final selling price after discounts are applied. So a $100 item with a 20% discount becomes $80, and taxes are calculated on $80, not $100. This calculator follows that rule.
What are the tax rates used?
The calculator uses Québec rates: GST (Goods and Services Tax) at 5% and QST (Québec Sales Tax) at 9.975%, for a combined rate of 14.975%. If you are shopping in another province, rates differ — Ontario is 13% HST, BC is 12% HST, Alberta has no provincial sales tax.
You might also need
Complementary tools based on what you're doing