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Cost per All Purchase measures the average ad spend required to generate one purchase event of any type—new customer, returning customer, subscription, or otherwise.

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Formula

Cost per All Purchase = Channel Spend ÷ All Purchases

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Formula Components

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Example

Your Shopify store spent $12,000 on ads this month and generated 400 total purchases across all customer types. Cost per All Purchase = $12,000 ÷ 400 = $30.00

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How It Works

This metric divides your total advertising spend by all purchase events tracked by the Upstack pixel. Unlike new customer CPA, which only counts first-time buyers, Cost per All Purchase includes every transaction—giving you a blended view of acquisition efficiency across your entire Shopify customer base.

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When to Use

See all Attributed Conversions metrics →