Discount Impact Calculator

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.
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Pricing Inputs
Discount Impact
Effective Combined Discount
20,00%
Final Price After Discounts
80,00
Old Profit / Unit
40,00
New Profit / Unit
20,00
Profit Change / Month
−10.000,00
Units Needed to Match Profit
1.000
Required Volume Increase
100,00%
Discount Ladder Comparison
Discount %New PriceProfit/UnitBreak-Even UnitsRequired Uplift %
5%95,0035,0057114,29%
10%90,0030,0066733,33%
15%85,0025,0080060,00%
20%80,0020,001.000100,00%
25%75,0015,001.333166,67%
30%70,0010,002.000300,00%

Each row applies the listed single discount to the current price, using the current cost per unit and monthly volume. The highlighted row matches the Discount (%) input.

Insights
Max Safe Discount: 40,00%

To keep the same total profit, monthly volume must rise by 100,00% (500 extra units). If the promotion cannot achieve this, total profit will fall.

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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 includes a discount ladder table for comparing multiple discount levels at once, support for stacked or extra discounts applied on top of the base discount, and a maximum safe discount badge showing the deepest cut that still keeps the price above cost. It helps retailers, ecommerce sellers, and service businesses evaluate promotions before launching them.

Common Use Cases

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.
8
Use the discount ladder table to compare several discount levels side by side and see the profit impact of each.
9
Add an extra or stacked discount on top of the base discount to model combined promotions such as coupon plus sale price.
10
Check the maximum safe discount badge to find the deepest discount that still keeps the selling price above your unit cost.

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.

The discount ladder table applies the same price, cost, and volume inputs across a range of discount levels so you can compare profit impact and required volume increase for each level in one view.

Stacked discounts are combined multiplicatively rather than additively. For example, a 20% base discount with an extra 10% stacked discount yields a final price of 90% times 80% equals 72% of the original, a total reduction of 28%.

The maximum safe discount is the largest percentage cut that keeps the discounted price exactly at or just above the unit cost. Any discount beyond this point sells every unit at a loss.

Common Mistakes

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.

They apply multiplicatively, not additively. A 20% discount followed by an extra 10% discount gives a total of 28% off the original price, not 30%, because the extra 10% applies to the already discounted price.

It shows the deepest discount you can offer while still covering your unit cost. Discounting beyond that level means losing money on every sale, so treat it as a hard ceiling for promotions.

Related Topics

Profit margin analysisPricing strategyPromotion planningBreak-even analysisMarkup and marginEcommerce pricingRetail sales planningRevenue planningCost analysisMarketing strategySelling price calculationInventory management