> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Returning Customer CM4 per Order: Repeat Order Operating Profit

> Track Returning Customer CM4 per order for your Shopify store. Measure operating profit per repeat buyer order.

<Tip>
  RC CM4 per Order measures the average operating profit per returning customer order—your true profit from each repeat buyer transaction.
</Tip>

## Formula

<Info>
  **RC CM4 per Order** = **RC CM4** ÷ **Returning Customer Orders**
</Info>

### Formula Components

| Metric                                                                             | Definition                          |
| ---------------------------------------------------------------------------------- | ----------------------------------- |
| [**RC CM4**](/reference/metrics/orders/contribution-margin/returning-customer-cm4) | Returning customer operating profit |
| [**Returning Customers**](/reference/metrics/orders/customers/returning-customers) | Count of returning customer orders  |

| Metadata        |                                                                      |
| --------------- | -------------------------------------------------------------------- |
| **Type**        | Currency                                                             |
| **Data Source** | [Shopify](/sources/shopify), [Upstack Costs](/sources/upstack-costs) |
| **Aggregation** | Average                                                              |

***

## Example

Returning customers generated **\$13,000** CM4 from **750** orders.

| Component            | Value       | Calculation      |
| -------------------- | ----------- | ---------------- |
| RC CM4               | \$13,000    | Operating profit |
| RC Orders            | 750         | Repeat orders    |
| **RC CM4 per Order** | **\$17.33** | \$13,000 ÷ 750   |

***

## How It Works

RC CM4 per Order shows your true operating profit per returning customer order after all costs. This is typically higher than NC CM4 per Order since repeat orders don't carry acquisition cost. Multiply by expected repeat orders to project lifetime value.

***

## When to Use

| Scenario               | Action                                                |
| ---------------------- | ----------------------------------------------------- |
| LTV calculations       | RC CM4 per Order × expected orders = LTV contribution |
| Comparing segments     | Benchmark against NC CM4 per Order                    |
| Retention investment   | Set loyalty program budget against RC CM4 per Order   |
| Profitability analysis | Track true profit per repeat transaction              |

***

## Related Metrics

| Metric                                                                                       | Relationship                              |
| -------------------------------------------------------------------------------------------- | ----------------------------------------- |
| [RC CM4](/reference/metrics/orders/contribution-margin/returning-customer-cm4)               | Total returning customer operating profit |
| [NC CM4 per Order](/reference/metrics/orders/contribution-margin/new-customer-cm4-per-order) | Operating profit per new customer order   |
| [LTV](/reference/metrics/orders/ltv/ltv)                                                     | Total customer lifetime value             |

[See all Contribution Margin metrics →](/reference/metrics/orders/contribution-margin)