Ecommerce Discount Profit Calculator
See how a discount changes your selling price, profit per order, and profit margin before you launch a promotion.
Discount impact
Profitability detail
Test a promotion before the discount quietly wipes out order profit
Use this calculator when you know your regular price and costs and want to see what a planned percentage discount does to profit per order.
The calculator applies the discount to the regular selling price, then recalculates percentage selling fees on the discounted revenue.
It compares discounted profit with full-price profit and calculates both the break-even selling price and the maximum discount before the order reaches zero profit.
A discount reduces revenue immediately, but many costs do not fall with the selling price. That is why profit can decline much faster than the headline discount percentage suggests.
How the calculation works
The model compares the exact same order at full price and discounted price.
Calculate discounted revenue
The discount percentage is applied to the regular selling price.
Recalculate selling fees
Percentage fees are based on the lower discounted price.
Calculate discounted profit
Product and other order costs are subtracted from discounted revenue.
Find the break-even discount
The calculator determines the selling price and discount level where profit reaches zero.
Example discount profitability test
Suppose a $60 product is discounted by 30%:
The discounted selling price is $42.00. Profit falls to $3.96 and profit margin to about 9.4%. Full-price profit would be $21.60, so the promotion gives up $17.64 of profit per order. Break-even price is about $37.96.
What each result means
The most important result is not the discount itself but what remains after the discount.
Discounted selling price
The actual revenue per order after the percentage discount.
Profit per order
Discounted selling price minus all included costs.
Profit lost vs full price
The difference between full-price profit and discounted profit.
Maximum discount before break-even
The largest discount the current cost structure can absorb before profit reaches zero.
Discount profitability questions
Useful checks before launching a sale or coupon.
Why does a 30% discount reduce profit by more than 30%?
Because most product and fulfillment costs remain fixed while revenue falls. The discount is applied to revenue, not to your cost base.
Should ad cost change during a promotion?
If you expect acquisition cost to change, use the expected promotional ad cost. Otherwise the model assumes the entered cost stays constant.
What if the maximum break-even discount is lower than my planned discount?
Under the assumptions entered, the planned promotion would lose money per order unless another cost falls or another source of value offsets the loss.
Does the calculator account for higher conversion from discounts?
No. It evaluates per-order economics. A separate volume or conversion analysis is needed to decide whether more orders compensate for lower profit per order.