> ## 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 Registration: Registration Acquisition Efficiency

> Track Meta Cost per Registration to measure sign-up campaign efficiency. Calculate average spend per registration and optimize your Meta ads.

<Tip>
  Meta Cost per Registration measures the average spend to acquire each registration from your Meta ads.
</Tip>

## Formula

<Info>
  **Meta Cost per Registration** = **Meta Spend** ÷ **Meta Completed Registrations**
</Info>

### Formula Components

| Metric                                                                                                                | Definition                                      |
| --------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------- |
| [**Meta Spend**](/reference/metrics/advertising/meta/meta-spend/meta-spend)                                           | Total amount spent on Meta ads                  |
| [**Meta Completed Registrations**](/reference/metrics/advertising/meta/meta-conversions/meta-completed-registrations) | Number of completed sign-ups attributed to Meta |

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

***

## Example

Your SaaS app spent **\$3,200** on Meta ads last month promoting free trial sign-ups and drove **640 registrations**.

| Metric                         | Value      |
| ------------------------------ | ---------- |
| Meta Spend                     | \$3,200    |
| Meta Completed Registrations   | 640        |
| **Meta Cost per Registration** | **\$5.00** |

***

## How It Works

Meta Cost per Registration divides your total ad spend by the number of CompleteRegistration events tracked via the Meta Pixel or Conversions API. A registration event fires when someone finishes your sign-up flow, creates an account, or completes a free trial registration. Lower cost per registration indicates more efficient acquisition.

***

## When to Use

| Scenario                     | Action                                                                    |
| ---------------------------- | ------------------------------------------------------------------------- |
| Evaluating sign-up campaigns | Compare cost per registration across ad sets to find efficient performers |
| Budget allocation            | Shift spend toward campaigns with lower registration costs                |
| Benchmarking against leads   | Compare to Cost per Lead to see funnel conversion efficiency              |
| Setting acquisition targets  | Use as a baseline for customer acquisition cost planning                  |

***

## Related Metrics

| Metric                                                                                                            | Relationship                                             |
| ----------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------- |
| [Meta Completed Registrations](/reference/metrics/advertising/meta/meta-conversions/meta-completed-registrations) | Denominator—total registrations used in calculation      |
| [Meta Spend](/reference/metrics/advertising/meta/meta-spend/meta-spend)                                           | Numerator—total spend divided by registrations           |
| [Meta Cost per Lead](/reference/metrics/advertising/meta/meta-conversions/meta-cost-per-lead)                     | Similar efficiency metric for earlier-funnel lead events |

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