Your conversions are counted twice, and it makes you spend more
The same enquiry measured by two tools installed in two eras counts twice. Your results look better than they are, and automated bidding, which relies on those same numbers, rises on a reality that does not exist.
The typical scenario repeats from one business to the next. A tag was placed directly in the code at launch. A tag manager arrived two years later with a new vendor, who rebuilt the tracking without removing the old one. Both work, nobody knows, and both count.
The costliest variant is tracking placed on a thank-you page in addition to a trigger on form submission. A visitor who refreshes the page or returns to it through their history adds a conversion each time.
The gap goes unnoticed because it points the right way. Nobody disputes numbers that go up, and platform reports cannot flag a duplicate they do not see as one.
Double counting has a quieter cousin: the same conversion recorded by the ad platform and by your analytics tool, then added together in a dashboard aggregating both. The figure presented to management then exists in neither system.
How to spot it
The method needs no tool. Take a completed month, count the enquiries that actually arrived in your inbox or your sales system, and compare to the number of conversions reported by the platform.
Do the exercise over a full month, not a week. B2B cycles are long enough that a week gives a misleading gap in either direction.
A gap of a few points is explained by delays, blocking and consent. A gap of two to one is explained by a duplicate, and finding it then takes a few minutes in the tag manager.
The two-minute check
- Compare last month's enquiries received to the conversions reported by each platform.
- Check the counting setting on each action: one conversion per person, or every conversion.
A report claiming more enquiries than your team handled is not informing you, it is costing you money in misdirected bidding.
Reconciling your actual files with your reports is part of what we cover in a paid audit.
For a product sold by quote, the correct setting is one conversion per person. Counting every submission rewards the undecided visitor who fills the same form three times.
The overall view of conversion is in what conversion rate optimization really fixes.
The most frequent gaps are listed in measuring conversions properly, and what server-side tagging solves in server-side tagging.
- Google Ads, documentation on conversion action counting settings, help centre, accessed February 2027.
Gabriel almost always takes your first call and carries out your audit. He builds the strategy starting from your growth goal: where to put your budget, which market to test and how to connect each lead to a real sale in your CRM. He mainly leads engagements for three goals: Optimize the profitability of your digital campaigns, Develop a new market, and Generate demand and growth. With Geneviève, he also works on organic search (SEO), AI visibility (GEO) and conversion rate optimization (CRO). The sales a Google Ads or Meta Ads campaign brings in depend on the page that receives the click. He writes mainly about marketing strategy, paid advertising and measurement.
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