See how a discount changes your per-unit and total profit, and how many extra units you must sell to make up the margin given away.
Overview
The Discount Impact Calculator shows how a price discount changes per-unit and total profit, and how many additional units must be sold to keep total profit unchanged. It helps retailers, ecommerce sellers, and service businesses evaluate promotions before launching them.
Common Use Cases
Promotion planning
Sale campaign evaluation
Margin protection
Ecommerce discount strategy
Volume requirement analysis
Retail clearance pricing
Coupon and voucher planning
B2B volume discount decisions
Profit impact analysis
Pricing review
Inventory clearance
Marketing ROI planning
How to Use
1
Enter the current unit price.
2
Input the unit cost.
3
Enter the number of units sold per month.
4
Set the discount percentage being considered.
5
Review the discounted price and new profit per unit.
6
Check how total monthly profit changes.
7
See how many units must be sold to match the previous profit.
Example Scenario
Site-Wide Promotion
An ecommerce store plans a 20% discount and wants to know how many extra orders are needed to avoid a profit drop. The calculator provides the required volume increase.
Technical Notes
The discounted price is the current price reduced by the discount percentage.
Profit per unit is the selling price minus the unit cost.
Profit change compares total profit at the discounted price against profit at the original price at current volume.
Break-even units is the volume needed at the discounted price to earn the same total profit as before.
The required volume increase is the percentage rise in units needed to offset the margin given away.
If the discounted price falls at or below cost, no sales volume can restore the previous profit.
Common Mistakes
Assuming discounts always pay off in volume
Ignoring unit cost when setting discounts
Measuring success by revenue instead of profit
Forgetting that volume must rise at the same margin rate
Offering discounts on low-margin products
Stacking discounts without re-checking profit
Frequently Asked Questions
Divide your current total profit by the new per-unit profit to get the required unit volume, then compare it against realistic demand.
Because every discounted unit earns less profit, so revenue can grow while total profit falls.
The smallest discount that achieves the promotion objective while keeping the discounted price well above cost.
Yes. Treat the service price as the unit price and variable delivery cost as the unit cost.