Loss Leader Profit Recovery Calculator

About this calculator

A loss leader is a product priced below cost to pull customers into a store or checkout flow — think a supermarket selling milk near cost to get shoppers who then fill their cart with higher-margin groceries. This calculator works out how many units of an “attach” product (the higher-margin item bought alongside the loss leader) you need to sell to recover the loss taken on each leader unit.

The formula divides the total loss by the profit margin per attach unit: attach units needed = (loss per leader unit × units sold) ÷ attach margin. Sell 500 loss leaders at a $2 loss each, with a $5 margin on the attach item, and you need 200 attach sales just to break even — everything past that is genuine profit.

Retail and e-commerce merchandisers use this to judge whether a promotional pricing strategy is actually paying for itself through basket-size and cross-sell lift, rather than just moving inventory at a loss.