How do I check for duplicate conversion tracking?

In 2026, the two primary ways to catch duplicates are by analyzing the Repeat Rate in the interface and using Segmented Reporting.

1. The “Repeat Rate” Indicator

The Repeat Rate tells you how many conversions are recorded, on average, for every unique person who converts.

Go to Goals > Conversions > Summary.

Look for the “Repeat rate” column in the table.

Note: If you don’t see it, click Columns > Modify columns, search for “Repeat rate,” and add it.

Analyze the Data:

1.0 to 1.1: This is normal (excellent).
1.5 or higher: This is a red flag for leads. It means for every 10 people who fill out a form, you are recording 15 conversions.
Exception: For E-commerce (Purchases), a higher repeat rate may be normal if customers frequently buy multiple separate items in a short window.

2. Segmenting by “Conversion Action”

This is the fastest way to see if two different tracking methods (e.g., a Google Ads Tag and a GA4 Import) are counting the same event.

Go to your Campaigns tab.
Click the Segment icon (three bars) above the table.
Select Conversions > Conversion action.
The Diagnosis: Look at a specific sale or lead. If you see two separate rows (e.g., “Purchase – Google Tag” and “Purchase – GA4”) both showing 1 conversion for the same campaign, you are double-counting.

3. Real-Time Testing with Tag Assistant

To see if a tag “double-fires” on a single page load:

Launch Google Tag Assistant in Preview mode.
Complete a test conversion on your site.
In the Tag Assistant timeline, look at the “Tags Fired” section.
The Red Flag: If you see the “Google Ads Conversion Tracking” tag appear twice under the same event, your trigger is duplicated or firing twice (e.g., once on “Page Load” and once on “Form Success”).

How to Fix Duplicates

If the cause is…	The 2026 Fix is…
GA4 & Google Tag overlap	Set one to Primary and the other to Secondary.
Page Refreshes	Add a Transaction ID to your tag. Google will ignore any second conversion with the same ID.
Wrong Counting Setting	Change your “Count” setting from “Every” to “One” (best for lead forms).
GTM Trigger Error	Ensure your trigger is set to “Once per page” or “Once per event.”

The “Transaction ID” Shield

Note for Guide: In 2026, the most robust way to prevent duplicates is to pass a unique transaction_id (like an order number) into the conversion tag.Even if a user reloads their “Thank You” page ten times, Google Ads will compare the ID and only record the very first instance.

Last Updated 2nd February 2026.

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