> ## 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.

# Subscription Churned: Track Subscription Cancellations

> Track when subscriptions churn (fail to renew). Measure revenue attrition from lost subscribers.

<Tip>
  Subscription Churned counts subscriptions that churned (failed to renew or were cancelled).
</Tip>

## Formula

<Info>
  **Subscription Churned** = **COUNT** ( subscription\_churned events )
</Info>

### Formula Components

| Metric                           | Definition                              |
| -------------------------------- | --------------------------------------- |
| **subscription\_churned events** | Events fired when a subscription churns |

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

***

## Example

Your SaaS application tracked **89 subscription\_churned events** in January.

| Metric               | Value | Notes             |
| -------------------- | ----- | ----------------- |
| Active Subscriptions | 2,340 | Start of month    |
| Subscription Churned | 89    | Lost during month |
| Monthly Churn Rate   | 3.8%  | Churn percentage  |

***

## How It Works

The Upstack pixel tracks `subscription_churned` events when a subscription ends due to non-renewal, cancellation, or payment failure. This metric captures involuntary and voluntary churn for retention analysis.

***

## When to Use

| Scenario            | Action                                       |
| ------------------- | -------------------------------------------- |
| Retention analysis  | Monitor churn rates over time                |
| Cohort analysis     | Compare churn by acquisition source          |
| Revenue forecasting | Factor churn into MRR projections            |
| Win-back campaigns  | Target churned subscribers for re-engagement |

***

## Related Metrics

| Metric                                                                                         | Relationship               |
| ---------------------------------------------------------------------------------------------- | -------------------------- |
| [Subscription Churned Cost](/reference/metrics/funnel/conversions/subscription-churned-cost)   | CAC wasted on churned subs |
| [Subscription Churned Value](/reference/metrics/funnel/conversions/subscription-churned-value) | MRR lost to churn          |
| [Subscription Cancelled](/reference/metrics/funnel/conversions/subscription-churned)           | Voluntary cancellations    |

[See all Conversions metrics →](/reference/metrics/funnel/conversions)