> ## 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.

# Cost per Signed Out: Track Sign Out Acquisition Cost

> Track the average ad spend per signed out event. Calculate how much you spend to generate each user sign out action.

<Tip>
  Cost per Signed Out measures the average advertising spend required to generate one user sign out event.
</Tip>

## Formula

<Info>
  **Cost per Signed Out** = **Channel Spend** ÷ **Signed Out Events**
</Info>

### Formula Components

| Metric                                                            | Definition                              |
| ----------------------------------------------------------------- | --------------------------------------- |
| **Channel Spend**                                                 | Total advertising spend across channels |
| [**Signed Out**](/reference/metrics/funnel/engagement/signed-out) | Total user sign out events tracked      |

| Metadata        |                         |
| --------------- | ----------------------- |
| **Type**        | Currency                |
| **Data Source** | [Upstack Pixel](/pixel) |
| **Aggregation** | Ratio                   |

***

## Example

Your SaaS product had **\$5,000** in ad spend and **250 signed out** events last month.

| Metric                  | Value       | Calculation          |
| ----------------------- | ----------- | -------------------- |
| Channel Spend           | \$5,000     | Total ad spend       |
| Signed Out Events       | 250         | Users who signed out |
| **Cost per Signed Out** | **\$20.00** | \$5,000 ÷ 250        |

***

## How It Works

This metric divides your total channel spend by the number of signed out events tracked by the Upstack pixel. While sign outs aren't typically a conversion goal, tracking this metric helps understand session behavior patterns and user engagement cycles.

***

## When to Use

| Scenario                    | Action                                       |
| --------------------------- | -------------------------------------------- |
| Tracking session patterns   | Monitor sign out frequency relative to spend |
| Understanding user behavior | Compare sign out rates across campaigns      |
| Engagement analysis         | Analyze session completion patterns          |
| SaaS lifecycle tracking     | Track user session behavior over time        |

***

## Related Metrics

| Metric                                                                | Relationship                         |
| --------------------------------------------------------------------- | ------------------------------------ |
| [Signed Out](/reference/metrics/funnel/engagement/signed-out)         | Count of sign out events             |
| [Login](/reference/metrics/funnel/engagement/login)                   | Opposite action in session lifecycle |
| [Cost per Login](/reference/metrics/funnel/engagement/cost-per-login) | Compare sign in vs sign out costs    |

[See all Engagement metrics →](/reference/metrics/funnel/engagement)