> ## 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.

# Blended New Customer CPA: Cost to Acquire New Customers

> Track your cost per new customer acquisition across all ad platforms. Calculate how much you spend on average to acquire each first-time buyer.

<Tip>
  Blended New Customer CPA measures how much you spend on average to acquire each new customer through your ads across all channels.
</Tip>

## Formula

<Info>
  **Blended New Customer CPA** = **Blended Spend** ÷ **Blended New Customer Purchases**
</Info>

### Formula Components

| Metric                                                                                                                          | Definition                                       |
| ------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------ |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                         | Combined ad spend across all connected platforms |
| [**Blended New Customer Purchases**](/reference/metrics/advertising/blended/blended-conversions/blended-new-customer-purchases) | First-time customer orders attributed to ads     |

| Metadata        |                                                                                                     |
| --------------- | --------------------------------------------------------------------------------------------------- |
| **Type**        | Currency                                                                                            |
| **Data Source** | [Meta Ads](/sources/facebook-ads), [Google Ads](/sources/google-ads), [TikTok Ads](/sources/tiktok) |
| **Aggregation** | Ratio                                                                                               |

***

## Example

Your store spent **\$12,000** across all ad platforms last month and acquired **150 new customers**:

| Platform    | Spend        | New Customers | Platform NC CPA |
| ----------- | ------------ | ------------- | --------------- |
| Meta        | \$6,000      | 80            | \$75.00         |
| Google      | \$4,000      | 50            | \$80.00         |
| TikTok      | \$2,000      | 20            | \$100.00        |
| **Blended** | **\$12,000** | **150**       | **\$80.00**     |

***

## How It Works

Blended NC CPA divides your total ad spend across all platforms by the number of new customers acquired. This metric specifically tracks first-time buyers, excluding repeat customers from the calculation.

***

## When to Use

| Scenario                                   | Action                                            |
| ------------------------------------------ | ------------------------------------------------- |
| Evaluating customer acquisition efficiency | Compare NC CPA to customer lifetime value         |
| Budget allocation decisions                | Shift spend toward platforms with lower NC CPA    |
| Scaling acquisition campaigns              | Monitor NC CPA as spend increases                 |
| Comparing to overall CPA                   | Higher NC CPA than CPA indicates strong retention |

***

## Related Metrics

| Metric                                                                                                                      | Relationship                           |
| --------------------------------------------------------------------------------------------------------------------------- | -------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                         | Numerator in NC CPA calculation        |
| [Blended New Customer Purchases](/reference/metrics/advertising/blended/blended-conversions/blended-new-customer-purchases) | Denominator in NC CPA calculation      |
| [Blended CPA](/reference/metrics/advertising/blended/blended-efficiency/blended-cpa)                                        | Overall CPA including repeat customers |

[See all Blended Efficiency metrics →](/reference/metrics/advertising/blended/blended-efficiency)