> ## 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.

# Meta Cost per Add Payment Info: Payment Entry Efficiency

> Track Meta Cost per Add Payment Info to measure payment entry efficiency. Calculate spend per payment submission to optimize checkout funnel costs.

<Tip>
  Meta Cost per Add Payment Info measures the average spend per add-payment-info event from your Meta ads, indicating checkout intent acquisition efficiency.
</Tip>

## Formula

<Info>
  **Meta Cost per Add Payment Info** = **Meta Spend** ÷ **Meta Add Payment Info**
</Info>

### Formula Components

| Metric                                                                                                  | Definition                                              |
| ------------------------------------------------------------------------------------------------------- | ------------------------------------------------------- |
| [**Meta Spend**](/reference/metrics/advertising/meta/meta-spend/meta-spend)                             | Total amount spent on Meta advertising                  |
| [**Meta Add Payment Info**](/reference/metrics/advertising/meta/meta-conversions/meta-add-payment-info) | Count of add-payment-info events attributed to Meta ads |

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

***

## Example

Your retargeting campaign spent **\$2,400** on Meta ads last week and generated **120** add-payment-info events.

| Metric                    | Value   | Calculation                            |
| ------------------------- | ------- | -------------------------------------- |
| Meta Spend                | \$2,400 | Total spent on Meta                    |
| Add Payment Info          | 120     | Payment submissions attributed to Meta |
| Cost per Add Payment Info | \$20.00 | \$2,400 ÷ 120                          |

***

## How It Works

Cost per Add Payment Info divides your total Meta ad spend by the number of add-payment-info events tracked via the Meta Pixel or Conversions API. An add-payment-info event fires when someone enters payment details during checkout after engaging with your ad. Lower cost indicates more efficient acquisition of high-intent users close to completing a purchase.

***

## When to Use

| Scenario                       | Action                                                         |
| ------------------------------ | -------------------------------------------------------------- |
| Evaluating checkout efficiency | Compare cost across campaigns to find best performers          |
| Optimizing bottom-funnel spend | Lower costs indicate better targeting or creative              |
| Diagnosing drop-off issues     | High cost may signal friction before payment step              |
| Budget allocation              | Shift spend toward campaigns with lower cost per payment event |

***

## Related Metrics

| Metric                                                                                              | Relationship                                       |
| --------------------------------------------------------------------------------------------------- | -------------------------------------------------- |
| [Meta Add Payment Info](/reference/metrics/advertising/meta/meta-conversions/meta-add-payment-info) | The denominator in this calculation                |
| [Meta Spend](/reference/metrics/advertising/meta/meta-spend/meta-spend)                             | The numerator in this calculation                  |
| [Meta CPA](/reference/metrics/advertising/meta/meta-efficiency/meta-cpa)                            | Similar efficiency metric for purchase conversions |

[See all Meta Conversions metrics →](/reference/metrics/advertising/meta/meta-conversions)