Formidable Forms GTM Event Listener

Formidable Form

Overview

Formidable Forms is a feature-rich WordPress form builder. It dispatches a jQuery custom event frmFormComplete after a form submission is confirmed. This listener catches that event and pushes the form ID and a formidable_form_submitted event to the GTM dataLayer.

Event fired: formidable_form_submitted Variable: formID

Common Use Cases

• Track lead form and contact form completions
• Differentiate between multiple Formidable forms using form ID
• Fire Google Ads conversions on form confirmation
• Measure form conversion rates in GA4

Installation

<!-- GTM Custom HTML Tag: Formidable Forms Listener -->
<script>
jQuery(document).ready(function($) {
  $(document).on('frmFormComplete', function(event, form, response) {
    var formID = $(form).find('input[name="form_id"]').val();
    window.dataLayer = window.dataLayer || [];
    window.dataLayer.push({
      'event': 'formidable_form_submitted',
      'formID': formID
    });
  });
});
</script>

Fire on: DOM Ready. Requires jQuery (included with WordPress).

Data Layer Output

{
  "event": "formidable_form_submitted",
  "formID": "5"
}

Trigger Configuration

Variables to Capture

GA4 Mapping

Debugging

Best Practices

1. Use a GTM Lookup Table to convert numeric form IDs to human-readable names
2. If using Formidable for payment forms, test that the event fires after payment processing

Related Listeners

• Gravity Form
• Ninja Form
• WSForm
• Forminator Form