How stacked discounts work
An extra discount applies to the already-reduced price, so 30% off plus another 20% off is not 50% off. The price becomes 70% × 80% = 56% of the original, a 44% total discount.
Sale price = Price × (1 − D1) × (1 − D2)
Stacked discounts aren't added together
A sale of 30% off plus an extra 20% off is not 50% off. The second discount applies to the already-reduced price: $100 becomes $70, then $56, so the real discount is 44%. Enter the extra discount above to see the combined effect.
Is it really a deal?
- Compare the sale price with what other stores charge, not just the "original" price on the tag.
- Check the price per unit (per ounce or per count) on groceries and household items.
- Remember sales tax is charged on the discounted price in most states, so you save a little tax too.
Frequently asked questions
Is tax charged on the original price or the sale price?
In most cases, sales tax applies to the price you actually pay after store discounts. Manufacturer coupons can be treated differently in some states.
How do I find the percent off from two prices?
Subtract the sale price from the original, divide by the original, and multiply by 100. Use the percent change box on the percentage calculator.