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Discount Calculator
The sale price, what you save and the total with GST/HST for your province.
The price
How discounts and sales tax work together
Stores take the discount first and charge sales tax on the sale price. 25% off $120 is $90, and with 13% Ontario HST you pay $101.70.
Stacked discounts don't add up: 25% off and then an extra 10% off is a 32.5% total discount, not 35%, because the second one comes off the lower price.
Want the tax on its own? Use the GST/HST calculator or the Ontario HST calculator. Eating out? The tip calculator adds tax and tip.
Frequently asked questions
Is sales tax charged before or after a discount?
After. The discount comes off first, and GST/HST or PST is charged on the lower sale price.
What is 25% off $120 with tax in Ontario?
$90 before tax, $101.70 with 13% HST. You save $30 plus the $3.90 of tax you'd have paid on it.
How do I calculate 20% off plus an extra 10%?
Multiply by 0.8, then by 0.9: the total discount is 28%, not 30%.
How do I calculate a discount percentage?
Divide the amount saved by the original price. $30 off $120 is 30 ÷ 120 = 25%.
Keep planning your taxes
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