Marketplace Coupon Discount Margin Calculator

Calculate marketplace margin after coupons or discounts, including COGS, fees, shipping, ads and target profit.

Need help with the calculation?
Marketplace Coupon Discount Margin Calculator

See how a coupon, sale price or promotion changes contribution margin after fees and order costs.

Set the promotion
Advanced assumptions
Profit after discount
$0.00
Discounted sale breakdown

For beginners: how to read this result
Discount lowers fee dollars tooPercentage fees are calculated on the discounted sale price, not the original price.
Fixed costs do not shrinkCOGS, shipping and fixed promo costs stay the same when price goes down.
Max discount protects profitThe max discount result is based on the target profit you enter.
Do not enter sales tax as revenue unless it is actually paid out to you and not remitted separately.
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Promotions can grow sales while shrinking contribution margin. This calculator converts a regular price and discount into sale price, fees, profit and the maximum discount that still protects your target profit.

Useful before

  • running a percent-off coupon;
  • joining a limited-time promotion;
  • testing whether a bundle can absorb a discount.

Note

The calculator treats the discount as a reduction in item revenue. It does not model lift in conversion rate or ranking.