How to Track Form Submissions with GTM

TL;DR

Three methods: GTM Form Submission trigger (enable Form Variables, create trigger with Form ID or Form Action filter — works for standard HTML forms), custom Data Layer event (your form handler pushes dataLayer.push({event: 'form_submit'}) on success — most reliable), or thank-you page trigger (fire tag when URL contains '/thank-you'). The Data Layer method is best because it only fires on successful submissions, not failed validations. Create GA4 Event and platform conversion tags triggered by the form event.

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Overview

Three methods: GTM Form Submission trigger (enable Form Variables, create trigger with Form ID or Form Action filter — works for standard HTML forms), custom Data Layer event (your form handler pushes dataLayer.push({event: 'form_submit'}) on success — most reliable), or thank-you page trigger (fire tag when URL contains '/thank-you'). The Data Layer method is best because it only fires on successful submissions, not failed validations. Create GA4 Event and platform conversion tags triggered by the form event.

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