The short answer
The better discount depends on the item price
With 20% off versus $15 off, the break-even price is $75. Below $75, $15 off saves more. Above $75, 20% off saves more.
Compare 20% off with $15 off
A percentage discount grows with the original price. A dollar-off coupon saves the same amount as long as the offer applies.
Scroll the table horizontally if needed.
| Original price | 20% off | $15 off | Better offer |
|---|---|---|---|
| $50 | $10 saved | $15 saved | $15 off |
| $75 | $15 saved | $15 saved | Same |
| $100 | $20 saved | $15 saved | 20% off |
The label alone does not tell you which deal is better. Compare the actual dollar savings for the item you plan to buy.
Calculate the break-even price
Find the price where both offers save the same amount with this formula:
For 20% off and $15 off, $15 ÷ (20 ÷ 100) = $75. That makes $75 the break-even price.
- Below the break-even price: dollar off saves more.
- At the break-even price: both save the same amount.
- Above the break-even price: percent off saves more.
Read the coupon terms first
Real offers may not apply as a simple discount on the item price. Before relying on a comparison, check these details:
- Savings caps: A percent-off coupon may say “up to $10 off.”
- Minimum spend: You may need to spend a certain amount before a coupon applies.
- Eligible items: Sale items, taxes, shipping, or particular brands may be excluded.
- Stacking: Another coupon, reward, or code can change the final price or may not be allowed.
If an offer includes extra product rather than a lower price, compare the unit price with the Extra Product vs. Discount Calculator.
Frequently asked questions
What if the dollar-off amount is more than the item price?
A discount cannot reduce the item price below zero in this calculator. The savings are capped at the original price.
Should I compare before or after tax?
Use the amount specified in the offer terms. Some coupons apply before tax and others apply after tax or exclude tax entirely.
Can I compare rewards points this way?
Points may have expiration dates or restrictions, so their value can differ from cash savings. Check the program terms before treating points as equal to dollars.