Google is changing the tracking code on websites: make sure your ads don't start "inventing" leads
Published: October 12, 2026 · 4 min read · By Septminor
Your website almost certainly runs an invisible piece of Google code. It tells your ads and analytics who visited, who sent an inquiry, who bought. Google Ads uses exactly this data to decide who sees your ads and how much to pay for them.
In May 2026 Google announced it is merging two of its tools for this code into one. Since late August the change has been reaching accounts gradually.
What changes for you
On the surface, nothing. Your site works as before and visitors won't notice a thing. But whoever has access to the settings (your marketer, developer, or a former contractor) will see an offer to "upgrade" everything in one click. There's also a new way to set up purchase tracking without a developer.
Sounds convenient. But conveniences like these are exactly where lead tracking usually breaks — and it breaks quietly.
The main risk: one lead counted twice
Imagine a single purchase being counted twice: once by the old setup and once by the new one. The report shows results twice as good as reality. The owner is happy, the ad system decides it's doing great and starts buying even more of that traffic. The budget grows, but real customers don't.
A made-up example: the ad account shows 40 leads for the week, but your sales manager received 22. The decision to "add budget because ads pay off" is made on numbers that don't exist. Even Google's own interface warns about the risk of double counting.
Two more things that are easy to miss
- Access. Which of the people you've ever worked with can still get into your site's settings and click "upgrade"? In most businesses, nobody knows.
- Cookie consent. If your site has an "I agree to cookies" banner, after the change analytics may start running before the visitor agrees. For customers in the EU, that's no longer a technical question but a legal one.
Signs something is wrong with your tracking
- The ad account shows noticeably more leads than actually reached you.
- After some "update," ad results suddenly improved even though nothing in the ads changed.
- Nobody can say for sure who has access to your site's settings.
Checking this yourself is hard: you need to reconcile several systems with each other and with real inquiries, find exactly where the duplicate comes from, and remove it without breaking the rest of your tracking. It's work worth doing once and doing right — ideally before the peak season. We explained why ads run blind without honest lead tracking in what a lead really costs without Google Analytics 4.
Let's match your real leads against what your ads report
We'll compare the numbers in your ad account and analytics with your real inquiries, remove duplicates and stale access, and make sure everything counts correctly after Google's update. You'll make budget decisions on honest numbers.
Sources: PPC Land, Google Help. The update is reaching accounts gradually. The 40 vs 22 example is illustrative.