> ## 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 ROAS: First-Time Buyer Ad Efficiency

> Measure return on ad spend for new customer purchases across all channels. See how many dollars of first-time buyer revenue you earn per dollar spent.

<Tip>
  How many dollars of new customer revenue you generate for every dollar spent on ads across all channels.
</Tip>

## Formula

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

### Formula Components

| Metric                                                                                                                                      | Definition                                                   |
| ------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| [**Blended New Customer Purchases Value**](/reference/metrics/advertising/blended/blended-conversions/blended-new-customer-purchases-value) | Total revenue from first-time buyers across all ad platforms |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                                     | Combined ad spend across Meta, Google, and TikTok            |

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

***

## Example

Your store spent **\$15,000** on ads this month and generated **\$37,500** from first-time customers:

| Channel     | NC Revenue   | Spend        | NC ROAS   |
| ----------- | ------------ | ------------ | --------- |
| Meta        | \$22,500     | \$8,000      | 2.81×     |
| Google      | \$10,500     | \$5,000      | 2.10×     |
| TikTok      | \$4,500      | \$2,000      | 2.25×     |
| **Blended** | **\$37,500** | **\$15,000** | **2.50×** |

***

## How It Works

Blended New Customer ROAS aggregates revenue from first-time buyers across all connected ad platforms and divides by total spend. A customer is "new" if they have no prior purchases in your store's history. This metric isolates acquisition efficiency from repeat purchase revenue.

***

## When to Use

| Scenario                          | Action                                                                    |
| --------------------------------- | ------------------------------------------------------------------------- |
| Evaluating acquisition efficiency | Compare NC ROAS to overall ROAS to see true acquisition cost              |
| Scaling new customer campaigns    | Identify which channels acquire customers most profitably                 |
| LTV-based budget planning         | Combine with customer lifetime value for long-term ROI                    |
| Diagnosing growth stalls          | Low NC ROAS with high overall ROAS signals over-reliance on repeat buyers |

***

## Related Metrics

| Metric                                                                                                                                  | Relationship                            |
| --------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------- |
| [Blended ROAS](/reference/metrics/advertising/blended/blended-efficiency/blended-roas)                                                  | Total return including repeat customers |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                                     | The denominator in this calculation     |
| [Blended New Customer Purchases Value](/reference/metrics/advertising/blended/blended-conversions/blended-new-customer-purchases-value) | The numerator in this calculation       |

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