How do I track form submissions in GA4?

Applies to: Google Analytics 4 (GA4)
Last updated: May 2025

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Problem

You want to track when users submit a form on your website—such as a contact form, newsletter signup, or lead capture form—but GA4 does not automatically track form submissions.

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Solution

To track form submissions in GA4, you’ll use Google Tag Manager (GTM) to detect the form interaction and send a custom event to GA4. This event can then be marked as a conversion if needed.

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Step-by-Step Guide Using Google Tag Manager

Step 1: Enable Form Variables (Optional but Helpful)

1. Go to https://tagmanager.google.com
2. Navigate to your GTM container
3. Go to Variables > Configure
4. Enable:
   • Form ID
   • Form Classes
   • Form Element
   • Form Target
   • Form URL

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Step 2: Create a Trigger for Form Submissions

1. Go to Triggers > New
2. Choose Trigger Type: Form Submission
3. Check Wait for Tags and Check Validation if needed
4. Configure trigger to fire on:
   • All Forms (if you only have one form)
   • Or Some Forms, with conditions like:
     • Form ID equals contactForm
     • Page Path contains /contact

Name and save your trigger (e.g., “Contact Form Submit”).

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Step 3: Create a GA4 Event Tag

1. Go to Tags > New
2. Choose Tag Type: GA4 Event
3. Set:
   • Event Name: form_submit or something descriptive like contact_form_submit
   • Event Parameters:
     • form_id: {{Form ID}}
     • page_path: {{Page Path}}
4. Link this tag to the form submission trigger you created
5. Save and publish

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Step 4: Test the Setup

1. Use GTM’s Preview mode
2. Submit the form on your site
3. Check that:
   • The trigger activates
   • The GA4 event tag fires
   • The event appears in GA4 DebugView

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Step 5: Mark the Event as a Conversion (Optional)

1. Go to Admin > Conversions in GA4
2. Click New conversion event
3. Enter the exact event name (e.g., contact_form_submit)
4. Save

Now this form submission is counted as a conversion.

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Advanced Notes

• If your form uses AJAX or JavaScript to submit (no page reload), standard form triggers might not work—you may need to use a Click Trigger or a Custom Event Trigger.
• You can track multiple forms by creating distinct triggers or by passing form identifiers (like ID or class) as parameters.
• For multi-step forms, consider tracking each step as a separate event.