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Cost per Lapsed Purchase measures the average ad spend required to generate one purchase from a lapsed customer, tracked by the Upstack pixel.

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Formula

Cost per Lapsed Purchase = Channel Spend ÷ Lapsed Purchases

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Formula Components

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Example

Your Shopify store spent $8,500 on win-back campaigns in February and reactivated 170 lapsed customers who completed purchases.

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How It Works

Upstack tracks purchase events from your Shopify store and identifies lapsed customers—those who have been inactive beyond the typical repurchase window. When these dormant customers return and complete a purchase, the event is tracked as a lapsed purchase. This metric divides your total advertising spend by the number of these win-back conversions, showing the true cost to reactivate a churned customer.

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When to Use

See all Conversions metrics →