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How to Plan a Discount Without Losing Your Margin

Check the final price, unit profit and extra sales needed before running a promotion.

A discount can attract customers, but a lower selling price also changes the amount left after product cost. Before announcing a promotion, calculate the final price and compare profit per unit before and after the discount.

Calculate the real effect

If an item sells for 80 and costs 50, it earns 30 in gross profit. A 25% discount reduces the price to 60 and profit to 10. The selling price fell by one quarter, but profit per item fell by two thirds. Use the discount calculator for the new price, then the margin calculator for the new gross margin.

How many extra sales are needed?

At 30 profit per item, 100 sales produce 3,000 gross profit. At 10 profit per item, you would need 300 sales to reach the same amount, before considering extra staff time, fees or returns. This does not mean every discount is bad; it means the target needs to be explicit.

Set a purpose and a limit

A promotion might clear slow stock, introduce a new product or bring back customers. Choose one goal, set an end date and track whether sales, gross profit and stock movement met it. Avoid stacking discounts without checking the combined final price.