If your business gets leads over the phone, then one of the biggest mistakes you can make in Google Ads is to count every phone number click as a real lead.
And this is exactly where many advertisers get stuck.
They set up Google Tag Manager, track clicks on the phone number button, and think call tracking is done. But later they realize a big problem: a user can click the number and still never actually place the call.
So the question becomes simple:
How do you accurately track phone call conversions in Google Ads?
And even more importantly:
Can you do it without using a Google Forwarding Number?
Let’s break it down in a practical way.
The Real Problem With GTM Phone Click Tracking
A lot of businesses use GTM to fire an event when someone clicks a phone number link on mobile.
On paper, this sounds fine.
But in reality, it only tells you that someone tapped the button. It does not confirm that the call was completed, connected, or even lasted long enough to be valuable.
This means your data can become misleading very quickly.
You may think your campaigns are generating a high number of phone leads, while in reality many of those “conversions” are just taps with no actual conversation.
That creates three major issues:
First, your reporting becomes inflated.
Second, your smart bidding starts learning from weak signals.
Third, you may increase budget on keywords that are not truly producing quality leads.
Google’s own documentation makes this distinction very clearly: clicks on numbers from a mobile website can be tracked, but that does not mean the actual phone call itself was verified. For actual website call measurement, Google’s native setup uses a Google forwarding number on the site.
Do You Need a Google Forwarding Number?
If you want Google Ads to natively track actual calls from your website, then yes, Google’s website call conversion setup relies on a Google forwarding number. That forwarding number replaces the number on your site for users who came from an ad click, allowing Google to record call details such as whether a call happened and whether it met your minimum duration threshold.
That is the tradeoff.
The tracking becomes stronger, but some businesses do not like this setup because they want their real number to remain visible at all times. They want people to save the original number, recognize the brand, and feel confident they are calling the correct business line.
And honestly, that concern is valid.
What If You Do Not Want to Use Google Forwarding Numbers?
This is where many advertisers hope there is a perfect free solution.
Unfortunately, there usually is not.
Without a Google forwarding number, Google Ads does allow some call-related measurement, but it is limited:
- You can track call clicks from ads and assets without a Google forwarding number in some accounts.
- Google says this option is based on its estimate of whether a meaningful call occurred after the click.
- For numbers clicked on your mobile website, you are often just tracking the click action rather than a verified completed phone call.
So if your goal is:
“I only want to know whether a real call happened from Google Ads traffic.”
Then simple GTM click tracking is not enough.
So What Is the Most Accurate Option?
If you do not want to use Google forwarding numbers, the most reliable route is usually a third-party call tracking system.
This is why tools like CallRail have become popular.
A platform like CallRail uses dynamic number insertion, which swaps in a tracking number for users coming from a specific traffic source while routing the call to your real business line. That gives you proper attribution and actual call records instead of just button clicks. CallRail describes this as dynamic number insertion, where a unique tracking number is displayed based on the visitor’s source.
Now yes, there is a cost.
And yes, that cost can feel frustrating when you only want cleaner call tracking.
But if your business closes leads over the phone, this expense is often justified because it gives you better optimization data, cleaner lead attribution, and more trustworthy reporting.
Is CallRail the Only Way?
Not necessarily.
There are other call tracking tools in the market, and Google also supports importing phone call conversion information in some workflows. But once you want accurate, attributed, real-call tracking without relying on Google forwarding numbers, you are moving beyond basic GTM and into dedicated call tracking territory.
So the honest answer is this:
No, CallRail is not the only software.
But yes, you will usually need some form of dedicated call tracking solution if your requirement is accuracy without Google forwarding numbers.
What Should You Do in Practice?
Here is the simplest decision-making framework:
If you only want a lightweight signal and do not mind imperfect data, then GTM click tracking is acceptable.
If you are okay with Google forwarding numbers, Google’s native phone call conversion tracking can work well.
If you want accurate call attribution but want to keep control over the tracking setup and call reporting, then a third-party solution like CallRail is the stronger option.
That is really what this comes down to: do you want cheap tracking, or do you want accurate tracking?
Because those two are often not the same thing.
My Final Opinion
I’ll put it very directly.
If phone calls are a serious lead source for your business, do not optimize your Google Ads campaigns based only on click-to-call button taps.
That data is too weak.
A click is interest.
A call is intent.
A qualified phone conversation is a lead.
Those are three very different things.
So if you truly want to know whether someone made a call through Google Ads, and you do not want to use Google forwarding numbers, then investing in a proper call tracking platform is usually the right move.
It may feel expensive at first.
But inaccurate data is often even more expensive because it leads to wrong decisions, wasted budget, and false confidence in bad campaigns.
If you need help with Google Ads call tracking setup, conversion auditing, or campaign management, you can always reach out through aliraza.co.
Because in PPC, better tracking does not just improve reporting.
It improves decisions.
