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.
Cost per All Purchase = Channel Spend ÷ All Purchases
| Metric | Definition |
|---|
| Channel Spend | Total advertising spend across all connected ad platforms |
| All Purchases | Total purchase events tracked by the Upstack pixel, including all customer types |
| Metadata | |
|---|
| Type | Currency |
| Data Source | Upstack Pixel |
| Aggregation | Ratio |
Example
Your Shopify store spent $12,000 on ads this month and generated 400 total purchases across all customer types.
| Purchase Type | Count | Share |
|---|
| New Customer | 180 | 45% |
| Returning Customer | 160 | 40% |
| Subscription | 60 | 15% |
| Total | 400 | 100% |
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.
When to Use
| Scenario | Action |
|---|
| Benchmarking overall efficiency | Compare against target CPA to gauge campaign health |
| High returning customer rate | This metric reflects repeat purchase value that NC CPA misses |
| Budget planning | Use for total cost forecasting across all order types |
| Channel comparison | Compare blended efficiency across Meta, Google, and TikTok |
| Metric | Relationship |
|---|
| Conversions | Attributed conversions for ROAS calculations |
| Conversion Value | Revenue generated from all conversions |
| Average Conversion Value | Average revenue per conversion for break-even analysis |
