> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aloftly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Checkout stage drop-off

> The share of visitors at one Shopify funnel stage who did not reach the next stage.

| Contract           | Value                            |
| ------------------ | -------------------------------- |
| Metric key         | `app.checkout_funnel.drop_off`   |
| Source             | Aloftly                          |
| Status             | active                           |
| Type               | application                      |
| Semantic version   | Application calculation          |
| Catalog visibility | Supporting or fixed-surface only |

## How it's calculated

```sql theme={null}
100 * (previous_stage - current_stage) / NULLIF(previous_stage, 0)
```

### Built from

* `ShopifyQL funnel counts`

## Known caveats

* Returns zero when the previous stage is zero; it does not infer missing stages.

## Where this appears

* Checkout Funnel widget
* Automated checkout-funnel checks

<AccordionGroup>
  <Accordion title="Grain and identity" icon="ruler">
    One transition between adjacent funnel stages over one selected period.

    **Join and identity keys**

    * Store and identical date window
  </Accordion>

  <Accordion title="Filters and boundaries" icon="filter">
    * All stages must come from the Shopify funnel dataset.
  </Accordion>

  <Accordion title="Timezone, currency, and freshness" icon="clock">
    **Timezone.** All stage inputs use the same Shopify reporting dates.

    **Currency.** Not applicable.

    **Freshness.** Same as Shopify daily analytics.
  </Accordion>

  <Accordion title="Version history" icon="clock-rotate-left">
    | Date       | Change                                                           |
    | ---------- | ---------------------------------------------------------------- |
    | 2026-08-03 | Bound funnel evidence to the certified Shopify commerce dataset. |
  </Accordion>
</AccordionGroup>