> ## 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.

# signup_completed Event

> Track when a user completes signup and creates an account in your SaaS application.

Fires when a user completes signup and creates an account. This is a key conversion event for measuring acquisition success.

## JavaScript

```javascript theme={null}
window._upstack('track', 'signup_completed', {
  userId: 'usr_xyz789',
  accountId: 'acct_abc123',
  userEmail: 'jane@acme.com',
  planId: 'plan_pro_monthly',
  planName: 'Pro Plan'
});
```

## Properties

| Property  | Type   | Required | Description            |
| --------- | ------ | -------- | ---------------------- |
| userId    | string | Yes      | New user identifier    |
| accountId | string | Yes      | New account identifier |
| userEmail | string | No       | User email address     |
| planId    | string | No       | Selected plan          |
| planName  | string | No       | Plan display name      |

## When to Fire

* After signup form submission succeeds
* After email verification completes
* After OAuth signup flow finishes