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How can I track 404 error pages using GTM and GA4?

Asked on Oct 07, 2025

Answer

Tracking 404 error pages using Google Tag Manager (GTM) and Google Analytics 4 (GA4) involves setting up a custom event to capture when users land on a 404 page. This can help you monitor and address broken links on your site.

<!-- BEGIN COPY / PASTE -->
    1. In GTM, create a new Trigger:Trigger Type: Page View
This trigger fires on: Some Page Views
Condition: Page Path contains "404"
    2. Create a new Tag in GTM:Tag Type: GA4 Event
Configuration Tag: Choose your GA4 Configuration Tag
Event Name: "404_error"
Trigger: Select the 404 Page View Trigger created earlier
    <!-- END COPY / PASTE -->

Additional Comment:

Ensure your 404 error pages have a consistent URL pattern (e.g., "/404") for the trigger to work effectively.
After setting up, test the trigger and tag using GTM's Preview mode to confirm they fire correctly on a 404 page.
In GA4, you can view these events under Reports → Engagement → Events to analyze the frequency and sources of 404 errors.

✅ Answered with Analytics best practices.

Ask any question about Analytics & Tracking here... and get an instant response.

How can I track 404 error pages using GTM and GA4?

Asked on Oct 07, 2025

Answer

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