Why Is This Important?

Accurate tracking allows you to measure:

Conversion rates: Evaluate form submission performance.
Lead generation: Track the effectiveness of campaigns that drive form submissions.
UX improvements: Identify potential issues and friction in the form submission process.

Step 1/7: Understanding Contact Form 7 Events

Contact Form 7 uses specific JavaScript DOM events upon form submission:

wpcf7mailsent: Fired upon successful form submission.
wpcf7mailfailed: Fired when submission fails.

We'll use the wpcf7mailsent event to track successful submissions.

Step 2/7: Custom JavaScript to Push Events to GTM's Data Layer

To ensure reliable tracking, we’ll create a JavaScript listener that pushes a custom event to GTM's dataLayer when the Contact Form 7 form is successfully submitted.

Set Up in Google Tag Manager:

In GTM, navigate to Tags → New → Custom HTML.
Paste the following custom JavaScript snippet:

<script>
document.addEventListener('wpcf7mailsent', function(event) {
var formId = event.detail.contactFormId;
var formName = event.detail.contactFormTitle;

window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
  'event': 'cf7SuccessfulSubmit',
  'cf7FormId': formId,
  'cf7FormName': formName
});
}, false);
</script>

Explanation of the JavaScript Code:

Listens for Contact Form 7’s built-in wpcf7mailsent event.
Extracts useful data like the form’s ID and form’s title.
Pushes a clearly identifiable custom event (cf7SuccessfulSubmit) with relevant details into the dataLayer.
Save your Custom HTML tag with a clear name like "CF7 - Submission Listener".
Set the Trigger to fire on "All Pages".

Step 3/7: Create GTM Data Layer Variables

We’ll now create Data Layer Variables in GTM to capture form details:

Navigate to GTM → Variables → New → Data Layer Variable
Save each variable individually.

GTM Variable Name	Data Layer Variable Name
DLV - CF7 Form ID	cf7FormId
DLV - CF7 Form Name	cf7FormName

Step 4/7: Create GTM Custom Event Trigger

Create a trigger that listens specifically for our custom dataLayer event:

Go to GTM → Triggers → New → Custom Event.
Event Name: exactly match cf7SuccessfulSubmit .
Trigger fires on: All Custom Events.
Name your trigger clearly: "CF7 - Successful Form Submission".
Save this trigger.

Step 5/7: Create a GA4 Event Tag to Send Data to Google Analytics

Next, set up the GA4 event tag to log form submission data:

In GTM, navigate to Tags → New → Google Analytics: GA4 Event.
Configuration Tag: Select your GA4 configuration tag.
Event Name: Use a clear event name, such as cf7_form_submit.
Event Parameters (recommended for detailed reporting):

Parameter Name	Value (DLV Variable)
form_id	{{DLV - CF7 Form ID}}
form_name	{{DLV - CF7 Form Name}}

Under "Triggering," select the trigger: "CF7 - Successful Form Submission".
Name the tag clearly: "GA4 Event - CF7 Form Submission".
Save the tag.

Step 6/7: Preview, Debug, and Verify the Setup

Always test before publishing:

Click Preview in GTM.
Navigate to your Contact Form 7 page.
Submit the form.
In GTM preview mode, ensure:
-cf7SuccessfulSubmit event fires correctly.
-GA4 event tag "GA4 Event - CF7 Form Submission" fires properly with accurate parameters.

Step 7/7: Verify Data in Google Analytics (GA4)

Check in GA4 reports:

Log into your GA4 account.
Navigate to Reports → Engagement → Events.
Check for your new event cf7_form_submit.
(Data may take up to 24 hours, or use DebugView in GA4 for immediate verification.)

Set Up Custom Dimensions (Optional):

For deeper insights:

In GA4 Admin → Custom Definitions → Create custom dimensions:

Dimension Name	Event Parameter	Scope
CF7 Form ID	form_id	Event
CF7 Form Name	form_name	Event

Hot it Will Look in GA4

Your GA4 data will clearly show which Contact Form 7 forms perform best.

This granularity enables optimization based on real-world insights.

Event Name	Form ID	Form Name	Event Count
cf7_form_submit	123	"Contact Us Form"	215
cf7_form_submit	456	"Newsletter Signup"	580

How to track Contact Form 7 submissions with GTM and GA4

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