Conversion tracking: why your numbers do not match

Three systems, three numbers. Google Ads reports 40 conversions, Google Analytics shows 25, and there are twelve enquiries in your inbox. The question we hear most often: which number is right?

Usually all three. They are simply not counting the same thing. That is the uncomfortable part of the answer, because as long as you believe one of the systems is broken, you are looking for the fault in the wrong place.

This article separates the two: the differences that are normal, and the errors that genuinely cost you money. At the end there is a self-test you can run in a quarter of an hour.

Four reasons Ads and Analytics never show the same number

None of them is a fault, and all four are in Google's own documentation.

The date. Google Ads books a conversion on the day of the click, not the day it happened. Somebody clicks your ad on Monday and submits the form on Thursday: Google Ads shows it on Monday, Analytics on Thursday. For services with a longer decision time, that shifts things by weeks.

The window. The conversion window in Google Ads can be set between one and 90 days, and the click itself expires after 90 days. Analytics works with a far longer horizon. If Ads is set to 30 days, you lose every enquiry that arrives later. It still shows up in Analytics.

The channel. Reports in Google Ads credit paid Google clicks by default. Analytics reports credit paid and organic by default. The same enquiry therefore sits in two reports under two different sources.

The counting method. A conversion action can count every instance or only one per click. A visitor who submits the form twice is therefore either two conversions or one.

On top of that comes a measuring mistake almost everyone makes: comparing too early. Google states that more than 95 percent of conversions are attributed within the first 14 days. Put the last seven days side by side and you are comparing an unfinished number with a finished one, and you will find a gap every time.

The errors that genuinely cost money

So much for the normal. Now the part we find in almost every account audit.

Nothing is being measured at all

The most common case, and it looks harmless: the campaigns are running, clicks are coming in, and the goal is set to "clicks" or to nothing at all. Google then optimises for exactly that. You get visitors, and you pay for them. Whether they turn into enquiries is something the system does not know, so it cannot work towards it.

The wrong moment is being measured

Almost as common: measurement exists, but the trigger does not match the form. The classic is the thank-you page that does not exist, because the form does not change the page and only shows a confirmation. The conversion then counts visits to a page nobody visits.

The reverse is just as expensive: the conversion hangs on the click of the submit button. It then also counts when the form was never sent because a required field was empty. That variant is particularly treacherous, because the numbers look good.

The tag fires, but consent blocks it

Since consent became mandatory, you only measure the share of visitors who agreed. Google closes that gap by calculation, through conversion modelling, but only if your account has enough volume.

This is where it pays to look closely: Google's own pages name two different thresholds. The older help page says 700 ad clicks over seven days per country and domain, while the newer page on improving modelling says 100 clicks per day. For most mid-sized accounts, both are out of reach. In plain terms: waiting for modelling will not help you. Your gap stays a gap, and you are better off accounting for it than explaining it away.

The deal closes offline and never comes back

For services that involve advice, the phone call decides whether an enquiry becomes an order. Google sees none of that. The system therefore optimises for enquiries rather than customers, and never learns which clicks were the valuable ones.

Enhanced conversions for leads exist for this: you send the close back to Google later, matched through the hashed contact details from the form. Anyone who has wired this up technically needs to know one date. Google moved these uploads to the Data Manager API as of 15 June 2026 and blocked them in the Google Ads API. If your upload still runs the old route, check whether it is arriving at all.

The self-test, fifteen minutes

You only need access to Google Ads, no extra tooling.

Open your goals. Is at least one conversion action set to "primary"? If not, no campaign is optimising for enquiries.
Check the status. Does the action say "No recent conversions"? Then the tag is either missing or not firing.
Check the counting method. For enquiries it should be "One", not "Every". For purchases it is the other way round.
Check the conversion window. If it is set to 30 days while your customers take weeks to decide, you are systematically losing the late closes.
Actually submit the form. Fill it in yourself, send it, and check the next day whether the conversion was counted. This is the only test that really matters.
Reconcile against your inbox. Take the last 30 days and put the reported conversions next to the actual enquiries. Fewer conversions than enquiries means a measurement gap. More means double counting.

Point five is the most important. Most of the tracking problems we find would have shown up from a single test submission in two minutes.

What to fix first

In this order, because each step is what makes the next one worth doing.

First, something correct has to be measured at all. Then that measurement has to hang on the right moment. Then you make sure as little of it as possible is lost to consent. And only then is it worth feeding closes back from sales.

Start at step four while step one is missing and you are building a very precise measurement on a number that does not exist.

If you want to know where else your budget is going, the most common patterns are in 5 ways businesses burn through their Google Ads budget. How we build and measure accounts is on the page about Google Ads and SEA.

Sources

Read on 28 October 2026, all from Google's own documentation: