Discount Price Calculator
Sale price, saving, and what it does to margin.
Sale price
$60.00
$20.00 off
You would need 2.00 times the volume just to make the same profit as before the discount.
How the Discount Price Calculator works
The saving is the easy part. The number that decides whether a promotion was a good idea is what the discount does to margin — and because discounts come entirely out of profit, the damage is always larger than the percentage suggests.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I calculate a discounted price?
Price × (1 − discount ÷ 100). A 25% discount on £80 gives £60. The £20 saving comes wholly out of margin, not proportionally out of cost.
How much does a discount cost in margin?
Far more than the headline. On a 40% margin, a 20% discount removes half the profit. The lower your starting margin, the more destructive any given discount is.
How much extra volume does a discount need?
Enough that the smaller margin on more units beats the larger margin on fewer. At a 40% margin, a 20% discount needs volume to double just to hold profit level — which most promotions do not achieve.
Is discounting ever the right move?
For clearing stock that is costing you storage, for acquiring customers with genuine repeat value, and for genuinely seasonal cycles. As a habit to drive routine sales it trains buyers to wait, and the baseline never recovers.