Google Ads Call-Only Campaigns: Optimising for Phone Calls, Not Clicks

Introduction

Standard Google Ads campaigns send traffic to your website. Call-Only campaigns skip this step entirely — when a user clicks your ad on mobile, it calls your business directly. No website visit, no form to fill in, no opportunity for second thoughts. The conversion pathway from search to contact is compressed to its shortest possible form.

For service businesses where a phone call represents genuine intent and typically converts to a booked job at a rate of 40–70%, this is a fundamentally different proposition to generating website visitors who may or may not enquire.

How Call-Only Ads Work

Call-Only ads appear in Google's mobile search results (they're mobile-only by design) and display your business name, phone number, and a brief description — but no landing page link. The CTA is a call button. When tapped, the ad initiates a phone call to your number directly.

The ad format displays:

Your business name
Phone number (prominently)
Two short description lines (25 characters each)
A "Call" CTA button

You're charged per click, just as with standard search ads — except in this case, a "click" is a phone call connection.

When Call-Only Campaigns Are the Right Choice

Emergency services: For any service where the customer's primary action is calling (24-hour plumbing, locksmithing, emergency electrical), Call-Only campaigns remove every step between intent and contact. A customer with a burst pipe who sees your Call-Only ad gets connected to you in a single tap.

High-converting phone businesses: If your phone-to-booking conversion rate significantly exceeds your website visitor-to-enquiry rate (common for most trade businesses), directing ad spend specifically toward calls optimises your cost per acquisition.

Limited website conversion capability: If your website isn't optimised for conversion — poor mobile experience, slow loading, unclear CTA — Call-Only campaigns bypass the website bottleneck entirely.

Businesses that can consistently answer the phone: Call-Only campaigns generate real-time calls. If your team can't reliably answer during business hours, Call-Only ads create a poor customer experience (unanswered call = lost lead). Only use Call-Only if you have consistent phone coverage.

Setting Up a Call-Only Campaign

Campaign type selection: In Google Ads, create a new campaign with the "Leads" goal and select "Phone calls" as your conversion action. Google will prompt campaign type selection — choose "Search" and enable the "Call-only" ad format option.

Geographic targeting: Set your service area precisely. Call-Only ads are particularly important to geo-target accurately — a call from outside your service area is a wasted spend.

Schedule: Set your ads to run only during hours when someone will answer the phone. There's little value in running Call-Only ads at 3am if your team doesn't respond to calls until 8am. For genuine 24/7 emergency services, always-on scheduling is appropriate.

Bidding strategy: Start with Manual CPC or Enhanced CPC to maintain control over spend while gathering initial data. Once you have 30–50 calls tracked as conversions, Target CPA or Maximise Conversions bidding can optimise toward your cost-per-call target.

Writing Effective Call-Only Ad Copy

Call-Only ads have very limited text space. Every character counts.

Headline (30 characters): Lead with your primary service and location, or your most compelling differentiator:

"Emergency Plumber Leeds"
"24/7 Gas Engineer — Leeds"
"Electrician Manchester Now"

Description line 1 (25 characters): Your primary value proposition or availability signal:

"Fast Response Guaranteed"
"Available Now – Call Us"
"Gas Safe Registered"

Description line 2 (25 characters): Secondary differentiator or call to action:

"Free Quotes – Call Now"
"Same Day Service"
"No Call Out Charge"

The character limits force ruthless clarity — which is actually a strength. Call-Only ad copy that works is stripped of everything except the information the caller needs to tap the call button.

Tracking and Measuring Call-Only Performance

Call tracking is essential for measuring Call-Only campaign ROI. Key metrics:

Call duration: Google tracks call duration from Call-Only ads. Set a minimum call duration (typically 60 seconds) as your conversion threshold — calls shorter than this are likely wrong numbers or very early hang-ups and should not be counted as leads.

Cost per call: Total spend divided by number of qualifying calls. Compare this against your average job value and close rate to determine profitability.

Call time distribution: When are calls coming in? This helps optimise your ad schedule to match peak call periods.

Missed calls: A critical metric often overlooked. If you're missing a significant percentage of calls generated by your ads, this represents direct lost revenue and wasted ad spend. Improve call answering consistency before scaling budget.

Integration with call tracking software: Platforms like CallRail or Infinity allow you to record calls (with appropriate disclosure) and analyse conversation data, enabling deeper quality assessment of Call-Only leads.

Call-Only Campaigns vs. Call Extensions on Standard Ads

An alternative to a dedicated Call-Only campaign is adding call extensions to your existing search campaigns. Call extensions display your phone number alongside standard ads with a website link.

Call-Only campaigns are better when:

Phone calls are the primary conversion you want to optimise for
Your website conversion rate is significantly below your phone conversion rate
You want to specifically dominate the "call this business" intent

Call extensions are better when:

You want to capture both phone calls and website visits
You have a well-converting website that supplements phone leads
You want to give searchers the choice of how to contact you

Many service businesses run both: dedicated Call-Only campaigns for high-intent emergency terms, and standard campaigns with call extensions for broader service keywords.

Negative Keywords for Call-Only Campaigns

Negative keywords are especially important for Call-Only campaigns because every irrelevant click is a direct call to your business consuming your team's time. Standard negative keyword categories for service businesses:

"free" (free estimates, free advice — excludes price-shoppers unless you genuinely offer free estimates)
"DIY," "how to," "tutorial" — excludes information seekers
Competitor names (unless you're specifically targeting competitor searches)
Geographic terms outside your service area

Review your Search Terms Report weekly in the early weeks of a Call-Only campaign and add negative keywords aggressively. The quality of calls is as important as their volume.

Conclusion

Call-Only campaigns are one of the most direct and efficient advertising formats available to UK service businesses — particularly those in emergency or high-intent service categories where a phone call is the natural next step for a customer with an urgent need. Set up correctly, tracked properly, and supported by consistent phone coverage, they generate some of the highest-quality leads available through any paid channel.

Want a fully managed Google Ads strategy for your service business? Zava Build creates and manages high-performance ad campaigns for UK service businesses. Book a free strategy session →

Google Ads Call-Only Campaigns