Call Tracking: Which Ad or Page Made the Phone Ring

The sources used are Google Ads Help pages About phone call conversion tracking, About call reporting, About call assets and Set up tracking calls to a phone number on a website, plus Google's guidelines for representing your business on Google and its help page on adding phone numbers to a Business Profile. Prices of call tracking tools are not covered. For how Google Ads works in general, see our Google Ads basics guide.

How call tracking works

The idea is simple: show a different phone number depending on where the caller came from, and route every one of those numbers to your real line. When a call arrives on a given number, the system knows its source. In Google Ads, those numbers are Google forwarding numbers. Google's call reporting page says they share your business's area code or prefix "whenever possible", fall back to a local number for your region, and in some cases show a toll-free number instead.

Two practical points follow from Google's pages. First, caller ID "still works for calls routed through Google forwarding numbers (except for some calls in India and Japan)", so your staff still see who is calling. Second, the numbers belong to Google: they "can change or be reassigned", so "you can't use your Google forwarding number outside of call reporting and website call conversion tracking." Never print one on a van, a flyer or your Business Profile.

Five kinds of call conversion in Google Ads

Google's phone call conversion page lists five ways to track calls:

1. Calls from ads: calls made directly from call ads, or from call and location assets. You set a minimum call length, and calls at least that long count as conversions. Needs call reporting turned on.
2. Calls to a phone number on your website: someone clicks your ad, then calls the forwarding number shown on your site. Same minimum-length rule. Needs the Google tag and a phone snippet.
3. Clicks on a number on your mobile website: a tap on a phone link after an ad click. Google notes that "we can only track these clicks, not the phone calls themselves."
4. Clicks on call ads and assets without a forwarding number: a click counts "based on Google's estimation of whether a meaningful phone call occurred".
5. Imported call conversions: calls tracked in another system and uploaded to Google Ads, which lets you count only calls that led to a sale and add the sale value.

Google adds that calls from ads, calls from a website and imported call conversions all require Google forwarding numbers, which are only available in the countries on Google's list. The first two give you real call data; a tap on a phone link only tells you someone tried.

Calls from ads: call assets and call reporting

A call asset adds your phone number to a search ad. Per Google's call assets page, on phones that can make calls a clickable call button appears under the ad, and on desktop a "Call us" button. Google checks the number: "Phone numbers will be verified to confirm they represent the business being promoted", and "vanity numbers, premium numbers, and fax numbers" are not accepted.

Call reporting is an account setting. When it is on, Google assigns a forwarding number to your ad and reports "call duration, call start time, caller phone number" (for calls over 15 seconds, except in India) and whether the call connected. A tap on the number in the ad is charged like a normal click; Google says it does not charge for people who dial the forwarding number by hand. If you would rather show your own number, or use a separate call tracking tool, Google says you can turn call reporting off, but then Google Ads stops tracking those calls.

Calls from your website: the phone snippet

Many people click an ad, read your site, then call. To catch those calls, Google's website call setup has two parts: create a call conversion action, then install the Google tag and a phone snippet on every page where your number appears. The snippet replaces your number with a Google forwarding number for visitors who came from an ad, which Google describes as "without any cost to you". Other visitors still see your normal number.

Points from Google's setup page that matter for your developer:

• Your web team needs to be able to edit the site, both to add the tag and to add the JavaScript that swaps the number.
• "Only one number can be tracked on a single page using the default Javascript tag." Tracking several numbers on one page needs the manual installation route.
• Installing through Google Tag Manager "isn't recommended if your website uses Dynamic Number Insertion (DNI) or third-party call tracking". Our Google Tag Manager basics guide covers how GTM works in general.
• If your site swaps numbers itself, Google cannot verify the number by scanning your page source, and unverified numbers can get ads disapproved. Google recommends linking Search Console to Google Ads, or placing the Google tag directly in the page's HTML (a tag inside Tag Manager does not verify the domain).

Write the number on the page as plain text that the snippet can find and replace, and make it a tappable link on mobile so the click can be measured too. Google's page also notes that, with website call conversions enabled, call reporting appears in Google Analytics as Phone Analytics metrics.

Phone numbers on Google Business Profile

Calls from your Business Profile are a separate channel, and Google's rules for it are stricter. The guidelines say to provide "a phone number that connects to your individual business location", to use "a local phone number instead of a central call center helpline number whenever possible", and that "the phone number must be under the direct control of the business." They also forbid "phone numbers or URLs that redirect or 'refer' users to landing pages or phone numbers other than those of the actual business", and premium-rate numbers.

The guidelines do not mention call tracking numbers by name. A tracking number that you own and that rings your own location is not ruled out by that text; a number controlled by a lead-generation company that passes calls to whoever pays is. Google's help page on contact details says that "in addition to your primary business phone number, you can add up to 2 more phone numbers", mobile or landline but not fax. If you put a tracking number in the primary slot, keep your main number as an additional one so the profile still shows the number used on your website and elsewhere. Our Google Business Profile guide covers the rest of the profile.

Counting the calls that matter

Not every call is a lead. Wrong numbers, suppliers and existing customers all ring the same line. Google's minimum call length is the first filter: its own example is a travel agent who finds that calls over two minutes tend to lead to sales and counts only those. Pick a length that matches your business, and review it after a month of data.

The stronger filter is your own records. If your team logs which calls became jobs, you can import those as conversions with their value, so Google's bidding learns from sales rather than from rings. Our guide to offline conversion import explains how sales from a CRM get back to Google Ads. Call recording, where you use it, brings consent and notice rules of its own; check them for your country before you switch it on.

A practical checklist

• Decide which calls you want to measure: from ads, from your website, from your Business Profile.
• Check that Google forwarding numbers are available in your country.
• Turn on call reporting and add call assets with a verified business number.
• Create a website call conversion action, install the Google tag and phone snippet on every page that shows your number.
• If the site uses another call tracking tool, verify your domain through Search Console instead of relying on a page scan.
• Set a minimum call length you can justify, and review it after a few weeks.
• Never reuse a Google forwarding number in print or on your Business Profile.
• On the Business Profile, use only numbers you control that reach your location, and keep your main number listed.
• Where you can, record which calls became sales and import them.

Frequently asked questions

Can I see which ad led to a phone call?

Yes, if you use Google forwarding numbers. With call reporting turned on, calls from call assets, location assets and call ads go through a Google forwarding number, and Google Ads reports details such as call duration, start time and whether the call connected. Calls to a forwarding number shown on your website after an ad click can be counted too, through the Google tag and phone snippet.

Does a short call count as a conversion?

Only if you want it to. For calls from ads and calls to a number on your website, you set a minimum call length, and only calls that last at least that long are counted as conversions.

Can I use the Google forwarding number on flyers or my Business Profile?

No. Google says forwarding numbers are its property and can change or be reassigned, so you can't use one outside call reporting and website call conversion tracking.

Can I use a call tracking number on my Google Business Profile?

Google's guidelines do not mention tracking numbers by name. They say the number must be under the business's direct control, must connect to that business location, and must not redirect people to other businesses' numbers. You can add up to two phone numbers besides the primary one, which lets you keep your main number on the profile as well.

What if I already use a third-party call tracking tool?

Google says you can turn off call reporting so your own number appears on ads, and you can import call conversions from another system. If your site swaps numbers with dynamic number insertion, verify your domain through Search Console or a Google tag in the page source, because Google cannot check the number by scanning the page.

Want your website set up so calls from ads are measured properly? See our website development service and all our services, or email [email protected].