Call tracking: the conversion most accounts do not see

Call tracking is the mechanism that turns a ringing phone into a reported conversion in the ad account. For service businesses, the phone often brings more enquiries than the form. If these calls are not counted as conversions, the account optimises on incomplete data and systematically pulls away from the campaigns that make people call. This is a hole that does not show up in any report, because what is missing is not displayed anywhere. There are several options: a call directly from the ad, dynamic number swapping on the website, importing the result from a CRM. A conversion is counted for a call above a minimum duration, which in Google Ads by default is 60 seconds. Check whether an action of the call type exists at all in the conversion list.

My name is Hristiyan Panov — a performance marketing consultant with over 5 years’ experience and over €2 000 000 managed advertising budget for over 90 companies on Google and Meta. Below are the tracking options, what to count as a conversion, and what the traps are.

What options are there?

• A click on the phone number. The simplest — it counts the tap, not the conversation. Useful as a start, but it overstates the result.
• A call from the ad extension. Google records the duration and can count a conversion only above a certain threshold of seconds.
• A swapped number on the website. Every visitor sees a different number, linked to their source. The most accurate, but it requires a separate tool.

The third is the only one that links a specific call to a specific campaign and keyword.

What should you count as a conversion?

Not every call. A duration threshold — usually between 30 and 60 seconds — filters out wrong numbers and job enquiries. The threshold is chosen according to how long a real conversation lasts for you.

The better option, if you have the discipline for it: mark which calls were genuine enquiries and feed that back as offline conversion. Then the algorithm learns from quality, not from duration.

What are the traps?

• Double counting. A click on the number and a recorded call for the same person — two conversions for one enquiry.
• An unchanged number in the Google Business profile. Calls from maps get mixed in with the advertising ones.
• A forgotten number somewhere on the website. One old page with a fixed number is enough to leak part of the statistics.
• A threshold set too low. Then you also count the people who hung up after “hello”.

How does it affect bidding?

Directly. A campaign that brings calls and zero forms looks like a loser — and the algorithm starves it. Automated bidding distributes the budget by what it sees: when calls are missing from the data, the money goes to the enquiries that end with a form, and the campaign is gradually pulled out of the auctions in which people simply pick up the phone.

After tracking is switched on, the same campaign often turns out to be the best in the account. So also check the box showing whether the action counts in the main conversions column — an action that is recorded for observation only does not enter bidding and changes nothing in how the budget is distributed.

Keep in mind, too, that after switching it on the account goes through a new learning period. The number of conversions jumps, the target CPA no longer matches the new baseline and has to be recalculated before you judge the campaigns by it. Give the campaign time to come out of learning and only then compare.

That is why, for service businesses, this is among the first things I check — before the structure and before the creatives.

And with Meta?

There the usual route is a call from the ad or from the landing page. The principle is the same: the event must reach the pixel and the server with a shared identifier, so that it is not counted twice.

The difference is that Meta does not give you the duration of the call. The seconds threshold falls away and one of two options remains: either you count the tap on the call button itself, which overstates the result, or you feed the outcome of the call back as an offline event.

The second requires that you can link the call to the person who clicked. UTM parameters do not survive a phone call, so the linking is done by number and by the time of the call, not by the page address.

Also check at ad set level which conversion event is selected. If you optimise for a completed form while people call, delivery will look for form-fillers and pass over the callers. Also check that the call button leads to the number you are tracking, and not to the old one in the ad text.

What to check today?

The check takes an afternoon and is done in this order:

• Open the conversion list and see whether an action of the call type exists at all, and whether it counts towards bidding and not only towards observation.
• Call from a phone and see whether the conversion appears in the account.
• Hang up once below the threshold and once above it — this confirms that the seconds are really being read, and that it is not just the dialling that is counted.
• Compare the number of recorded calls with the real ones in your phone exchange or call log.
• Check that all the numbers on the website are included in the tracking — including the one in the footer, on the contact page and on the thank-you page.
• Open the website from a phone: the number must be a tap-to-call link, not text the visitor copies by hand.
• See whether the call extension is approved and whether it is scheduled for the hours when someone actually answers the phone.
• Cross-check the number in the Google Business profile — if it is the same as the advertising one, the two sources get mixed.

FAQ — Frequently asked questions about call tracking

Do I have to notify the people who call?

If you record conversations — yes, and this is an obligation you should consult a lawyer about. Tracking the source itself is a different thing from recording the call.

Will my number change for customers?

With a swapped number, the visitor sees a temporary number that is redirected to yours. The customer speaks with you as usual.

Does it work at a small volume?

Tracking — yes. Optimisation on calls requires enough events per week to be stable.

How much does it cost?

A click on the number and calls from the extension are free. Swapped numbers are a separate service with a monthly fee depending on volume.

How does it combine with the form?

The two are separate conversion actions with separate values. If phone enquiries close more often, give them a higher value.

Conclusion

An account that does not see calls is not inaccurate — it is blind to half of the result. And the more automated the bidding, the faster this blindness turns into lost money.

If a large share of your customers call, but the advertising reports only forms, start with an independent review.

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Related articles: offline conversions · enquiry form · Google Ads account audit