Discount Impact Calculator
See how a discount changes selling price, profit per unit and contribution margin. Free, instant and mobile-friendly.
Enter your numbers
Formula
Discounted price = Original price × (1 − Discount rate)
How to use this result
Use the result to compare scenarios, set targets and identify the number that most affects your decision. Recalculate when prices, costs, customer volume or campaign performance change.
This calculator provides an estimate based on your inputs and is not accounting, tax, legal or investment advice.
Understand your Discount Impact Calculator result
Discounts can increase conversion while reducing the contribution earned from every order. This tool makes the trade-off visible before a promotion is published.
Worked example
A €100 product costing €55 with a 15% discount sells for €85. Profit becomes €30 per unit and the contribution margin is about 35.3%.
How to interpret it
A positive per-unit contribution does not prove the campaign is profitable. Estimate how many extra units the discount must generate to replace the contribution lost on each sale.
Practical next steps
- Compare discounted and full-price contribution.
- Include advertising and fulfilment costs.
- Set an end date and measure incremental sales.
Questions to ask before deciding
Are all relevant costs included? Is the time period consistent? How would the result change if volume, price or cost moved by 10%? Save your assumptions so you can compare the estimate with actual performance later.