> ## 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 Cost per Initiate Checkout: Acquisition Efficiency

> Track your blended cost per checkout initiation across all ad platforms. Compare acquisition efficiency and optimize ad spend for checkout conversions.

<Tip>
  Blended Cost per Initiate Checkout measures how much you spend across all ad platforms to generate one checkout initiation.
</Tip>

## Formula

<Info>
  **Blended Cost per Initiate Checkout** = [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend) ÷ [**Blended Initiate Checkouts**](/reference/metrics/advertising/blended/blended-conversions/blended-initiate-checkouts)
</Info>

### Formula Components

| Metric                                                                                                                  | Definition                                                        |
| ----------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                 | Total ad spend aggregated across all connected platforms          |
| [**Blended Initiate Checkouts**](/reference/metrics/advertising/blended/blended-conversions/blended-initiate-checkouts) | Total checkout initiations attributed to ads across all platforms |

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

***

## Example

Your campaigns spent **\$2,400** across all platforms and generated **800** checkout initiations.

| Metric                                 | Value      | Calculation          |
| -------------------------------------- | ---------- | -------------------- |
| Blended Spend                          | \$2,400    | Sum across platforms |
| Blended Initiate Checkouts             | 800        | Attributed checkouts |
| **Blended Cost per Initiate Checkout** | **\$3.00** | \$2,400 ÷ 800        |

***

## How It Works

This metric divides your total ad spend across Meta, Google, and TikTok by the number of checkout initiations attributed to those ads. It provides a unified view of acquisition costs regardless of which platform drove the conversion.

***

## When to Use

| Scenario                                 | Action                                                  |
| ---------------------------------------- | ------------------------------------------------------- |
| Comparing overall acquisition efficiency | Benchmark against Blended CPA to assess funnel drop-off |
| Setting budget allocation targets        | Use as a cost ceiling for checkout-focused campaigns    |
| Evaluating funnel optimization impact    | Track changes after checkout UX improvements            |
| Measuring cross-platform performance     | Compare to platform-specific costs to identify outliers |

***

## Related Metrics

| Metric                                                                                                              | Relationship                           |
| ------------------------------------------------------------------------------------------------------------------- | -------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                 | Numerator in calculation               |
| [Blended Initiate Checkouts](/reference/metrics/advertising/blended/blended-conversions/blended-initiate-checkouts) | Denominator in calculation             |
| [Blended CPA](/reference/metrics/advertising/blended/blended-efficiency/blended-cpa)                                | Compare checkout cost vs purchase cost |

[See all Blended Conversions metrics →](/reference/metrics/advertising/blended/blended-conversions)