Discount Impact: 30% Off a $75 Item with $25 Cost
A 30% discount on a $75 product costing $25 reduces gross margin from 66.7% to 52.4%.
How to use this tool
- Enter original selling price, cost per unit (cogs) and discount offered in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your new gross margin after discount and the full breakdown beneath it.
Products with strong gross margins can sustain larger promotional discounts, but it is important to quantify the exact margin impact before running a sale.
Frequently asked questions
- Why does a small discount have a big impact on margin?
- Because the discount comes entirely out of your profit, not your cost. A 10% discount on a product with 40% margin reduces margin by 6.7 percentage points — a 17% reduction in profitability. The lower your margin, the more damaging each percentage of discount.
- How do I calculate the volume increase needed to offset a discount?
- Volume increase needed = (original margin / new margin) − 1. If original margin is 40% and discount reduces it to 33.33%, you need to sell 40/33.33 = 1.2× as many units — a 20% volume increase — just to maintain the same gross profit dollars.