# Track UTMs on Systeme.io Funnels

## UTM attribution overview

Systeme.io UTM Tracking Integration only records UTMs that land on the checkout URL at purchase time. UTM Grabber keeps them in cookies on your site. This page explains how to pass that data through before the customer pays.

### What to expect

Systeme.io funnels need UTMs on the entry URL. Capture on WordPress and append to funnel links.

### Steps

1. utm-out on links into Systeme.io
2. Hidden custom fields on opt-in pages where supported

### Append UTMs with utm-out

```
<a href="https://your-checkout-url.example/product" class="utm-out">Buy now</a>
```

UTM Grabber rewrites the link with cookie values. Details: [utm-out class guide](https://docs.utmgrabber.com/books/102-getting-started-for-handl-utm-grabber-v3/page/appending-utms-to-the-buttons-using-class-name-attributes-selectively).

For webhook-based attribution after purchase, see [Send Systeme.io UTMs via Webhook](https://docs.utmgrabber.com/books/systeme-io-integration/page/end-ysteme-io-s-via-ebhook).