How do stacked discounts work (e.g. 20% off, then an extra 10% off)?

Stacked percentage discounts are applied one after another, not added together — 20% off followed by 10% off saves 28% total, not 30%, since the second discount applies to the already-reduced price.

Is sales tax calculated before or after the discount?

Typically after — most retailers calculate sales tax on the discounted price, not the original price.

Discount Calculator

Calculate the sale price and amount saved for any discount percentage.

Original price

Discount

You Save

$20.00

Final Price

$60.00

How It Works

The discount formula

The discount amount is the original price multiplied by the discount percentage. The final price is the original price minus that discount amount.

Example Calculation

An $80 jacket at 25% off saves $20, bringing the final price to $60.

Common Mistakes

Applying multiple discounts by adding the percentages together instead of applying them one after another (which usually saves less than the simple sum suggests).
Forgetting sales tax is typically calculated on the discounted price, not the original price.

Frequently Asked Questions

How do stacked discounts work (e.g. 20% off, then an extra 10% off)?: Stacked percentage discounts are applied one after another, not added together — 20% off followed by 10% off saves 28% total, not 30%, since the second discount applies to the already-reduced price.
Is sales tax calculated before or after the discount?: Typically after — most retailers calculate sales tax on the discounted price, not the original price.