Google Ads Call Tracking: What It Is And How To Track It

Google Ads can track phone performance in a few different ways:

1. Actual calls from your ads or website (when Google forwarding numbers are available)
2. Clicks on phone numbers (a proxy for calls)
3. Imported call conversions from a third-party tracker/CRM.

In Singapore, Google forwarding numbers (GFNs) are not currently supported. That means the most reliable path is: track tel: clicks for basic engagement and use a third‑party call tracking platform with dynamic number insertion, then import qualified call conversions to Google Ads for optimization.

Types Of Google Ads Call Tracking

Google Ads call tracking includes Google groups phone interactions into several conversion sources:

• Calls from ads: Calls made directly from call ads or call/location assets. You can set a minimum call length to count as a conversion. Requires call reporting with Google forwarding numbers (GFNs).
• Calls to a number on your website: After a paid click, Google dynamically replaces your site number with a GFN and tracks qualifying calls as conversions. Requires GFNs and the site tag.
• Clicks on a number on your mobile website: Tracks taps on tel: links. This measures click intent; it doesn’t confirm a connected call.
• Clicks on call ads and assets (without GFN): Counts a conversion based on Google’s estimation that a meaningful call occurred after the click.
• Import call conversions: Send call outcomes from a third‑party tracker or CRM into Google Ads (often matched by GCLID) so you only optimize to sales‑quality calls.

Why availability matters: GFNs and country support

GFNs are necessary for tracking actual calls from ads and website call conversions, and for Google’s native call reporting. Google provides GFNs in a defined list of countries; Singapore is not currently on that list.

If GFNs aren’t available in your market, you can still:

• Track mobile tel: clicks as a conversion (proxy).
• Use a third‑party call tracker (e.g., CallRail, WhatConverts, Nimbata) to measure real calls with dynamic number insertion (DNI) and then import qualified outcomes into Google Ads.

How to set up each Google Ads Call Tracking method?

1. Calls from ads (GFN markets only)

In Google Ads: Tools & Settings > Conversions > New Conversion Action > Phone calls > Calls from ads.

Enable call reporting in Account Settings. 

Configure:

• Conversion window (typically up to 60 days).
• Call length threshold (e.g., 60 seconds).
• Count (usually “One” for lead gen).
• Include in Conversions (Yes, if it’s a meaningful KPI).
• Add call assets or use call ads. Google will use GFNs to attribute calls.

2. Calls to a phone number on your website (GFN markets only)

• Create “Calls to a phone number on your website” conversion.
• Install the Google tag (via gtag or GTM).
• Google will replace the site number with a GFN after an ad click and track qualifying calls. Set a sensible call length threshold to filter spam/short calls.

3. Clicks on a number on your mobile website (works everywhere)

• Create “Clicks on your number on your mobile website” conversion.
• Implement via GTM: Trigger on Click URL contains tel:. This is a lightweight proxy metric (doesn’t verify call connection).
• Use for directional optimization when actual call tracking isn’t possible.

4. Clicks on call ads/assets (no GFN)

Create a conversion for clicks on call ads/assets without relying on GFNs.

Google may estimate when a call was likely meaningful after the click; treat as directional.

Import call conversions (recommended in Singapore)

5. Turn on auto-tagging so GCLID populates landing pages.

Use a third‑party call tracking platform with DNI to assign unique numbers per session/source.

Capture GCLID on the call session and evaluate lead quality (duration, agent disposition, sale outcome).

Import conversions to Google Ads (via Google’s offline import or direct integration) using GCLID to tie the call back to the click. Include only qualified calls in the Conversions column for Smart Bidding.

Third‑party trackers: when and why

Advantages over native:

• Works without GFNs; supports Singapore numbers.
• DNI for multi‑channel attribution (Google, Meta, Microsoft, organic).
• Call recording/transcripts, spam filtering, IVR paths, and lead scoring.
• GCLID capture and robust offline conversion imports so you optimize to revenue/SQLs, not just call length.

What to require from your vendor:

• Reliable DNI and number pools sized to your traffic.
• GCLID/GBRAID/WBRAID capture for privacy‑safe matching.
• Flexible integrations to Google Ads offline conversions and your CRM.

Attribution, counting, and settings that matter

• Call length threshold: Set a minimum duration (e.g., 60–90s) to filter accidental/spam calls.
• Count: For lead gen, use “One” to avoid inflating conversions when a user calls multiple times.
• Include in Conversions: Turn on only for outcomes that represent true success; keep “observational” metrics (e.g., tel: clicks) in All conversions if you don’t want them driving Smart Bidding.
• Attribution model: Use Data‑driven when eligible; otherwise, Last click is common for calls.

Singapore‑specific implementation plan 

Phase 1: Fast, no‑GFN setup

• Create “Clicks on number (mobile site)” conversion.
• Implement tel: click triggers in GTM; QA with Tag Assistant.
• To be used as an upper‑funnel signal while you prepare Phase 2.

Phase 2: Real call tracking with imports

• Pick a call tracking vendor with Singapore‑based numbers and robust DNI.
• Map your sales stages: MQL, SQL, booked appointment, sale.
• Capture GCLID on landing and pass it to your call tracker/CRM.
• Define “Qualified call” rules (e.g., >60s, correct IVR path, agent disposition).
• Import only qualified call outcomes back to Google Ads as offline conversions tied to GCLID.
• Assign conversion values if you have LTV or average order data to improve bidding.

Phase 3: Optimization and QA

• Monitor spam rates and increase call length thresholds if needed.
• Audit number replacement coverage (DNI should swap numbers in all places—header, footer, contact page, landing pages).
• Test routing and availability, simply put, more calls won’t help if you miss them.
• Calibrate bidding: keep “qualified calls” in the Conversions column; keep “tel: clicks” in All conversions if they’re too noisy.

Common pitfalls and how to avoid them

• Counting tel: clicks as conversions for Smart Bidding: Good for directional measurement, risky for optimization. Prefer qualified calls (offline imports) for bidding.
• Incomplete DNI coverage: Make sure every visible phone number is swappable; otherwise, you’ll lose attribution.
• Auto‑tagging off: Without GCLID, you can’t accurately import offline call conversions for Google Ads.
• Privacy/compliance: Confirm call recording and consent requirements in Singapore before enabling recordings.

Conclusion

Google Ads call tracking is a powerful tool for small businesses looking to measure and optimize phone call conversions effectively. By using Google’s built-in tracking methods or third-party platforms, businesses can gain valuable insights into customer interactions and optimize their campaigns for better results. In markets like Singapore, where Google Forwarding Numbers (GFNs) are not available, leveraging alternative call tracking solutions like dynamic number insertion (DNI) can still provide accurate data and enhance optimization.

If you need help setting up or optimizing your Google Ads call tracking strategy, First Page Digital offers expert services to help you get the most out of your campaigns. Learn more about our Google Ads Services, and see how we can improve your paid search strategy and drive better results for your business.