Discounts drive sales — and can quietly destroy profit. Because a discount comes straight off your margin, a small price cut needs a surprisingly large jump in volume just to break even. This guide shows the math, and how to discount in a way that protects your bottom line.
The hidden cost of discounting
A discount does not come off your revenue evenly — it comes off your profit. If your margin is 40% and you cut price 20%, you are giving away half your margin on every unit. To make the same profit you would need to sell far more, not just a little more.
Do the math before you discount
The lower your margin, the more extra volume a discount demands. A 10% discount on a 30% margin means you must sell about 50% more units just to make the same profit. Knowing your margin first is what keeps a "sale" from becoming a loss.
Discount deliberately, not habitually
- Make it time-boxed. A clear start and end creates urgency; permanent discounts just reset your price.
- Make it conditional. "Spend $X" or "buy 2, get 1" lifts basket size while you discount.
- Target it. Offer to lapsed customers or on slow stock, not across the board.
- Protect your best sellers. Discount what needs moving, not what already sells.
Alternatives to cutting price
Often you can add value instead of subtracting price: bundle related items, throw in a low-cost extra, or reward repeat purchases with a loyalty program. These lift sales without training customers to wait for the next sale.
Use discounts to clear, not to compete
Discounting is a great tool for clearing dead stock and rewarding loyalty — a poor one for competing on price long term. Price for profit first — see pricing for profit — and discount with intent.
See the margin impact instantly
RushFlow shows cost and margin on every sale, so you can see exactly what a discount does to profit before you run it — and which promotions actually pay.