How to Track Contact Form Submissions in GA4 Using Google Tag Manager (Thank You Page Method)

Tracking contact form submissions in GA4 is one of the most common and most important steps in building a reliable analytics setup.

In this tutorial, we walk through a straightforward method using a thank you page redirect to track form submissions with Google Tag Manager.

In this step-by-step walkthrough, you’ll learn how to:

• Create a GA4 event tag in Google Tag Manager
• Use a thank you page URL as a trigger for form submissions
• Configure your GA4 measurement ID using a constant variable
• Set up a page view trigger that fires only on the thank you page
• Test your setup using GTM preview mode
• Validate that your event is firing correctly in GA4
• Publish your changes to ensure tracking is live

This approach is ideal for websites where forms redirect users to a dedicated thank-you page after submission. It’s a simple, reliable way to track conversions without needing more advanced event listeners or custom scripts.

At Geear, this is one of the foundational tracking setups we implement to help credit unions and organizations measure conversions and understand what’s driving engagement on their website.