⏲️ 5 minutes

Google Ads Case Study: Cutting Cost Per Call by 94%

Lubble Team
[lmt-post-modified-info]
How we cut cost per phone call by 94% using Google Ads restructuring, negative keywords, manual bidding, and conversion-focused landing pages.

The Problem: $284 Phone Calls From Non-Branded Search

We’ve worked inside Google Ads accounts with budgets as large as $40 million per quarter and as small as $10,000 per quarter. Across that entire range, the mechanics that determine success do not change. Structure, intent, and cost discipline matter more than spend.

That perspective matters here.

Before we took over this particular Google Ads account, six agencies had already rotated through it with no improvement to the bottom line. Activity was constant. Efficiency was nonexistent.

This was not a branded advertiser. There was no existing brand demand, no navigational searches, and no low-cost conversions from people already searching for the company by name. Every phone call had to be earned through competitive, non-branded search terms.

To put the issue in context, the industry average cost for a qualified phone call in this market was $60.93.

This account was paying $284 per call.

Nearly $5,000 in ad spend produced just 17 phone calls, many of which never turned into customers.

The account was misaligned, optimized for activity instead of intent, and overpaying for traffic that should have been controlled.

What Changed After the Takeover

Once we assumed control, costs dropped quickly and predictably. Performance improved by correcting structural and intent mismatches inside the account.

Within months:

  • Average cost per call dropped to $16.87
  • Call quality improved
  • Call volume increased significantly
How to lower you PPC costs
Nov - Feb

1. Campaign Restructuring Into SKAGs

We rebuilt the account using Single Keyword Ad Groups (SKAGs). This allowed precise control over:

  • Query matching
  • Ad copy relevance
  • Quality Score
  • Cost per click

Broad, mixed-intent ad groups were replaced with tightly scoped groups aligned to purchase-ready searches.

2. Negative Question Words

A major source of wasted spend came from question-based searches, phrases such as:

  • “prices for…”
  • “cheap…”
  • “how much does…”

These searches are exploratory by nature. They are not wrong queries, but they sit higher in the funnel and signal research, not readiness to transact.

For large organizations with content teams, nurture programs, and dedicated sales follow-up, this traffic can make sense. Most small businesses do not have that infrastructure.

Instead, we concentrated paid search spend on queries that signaled clear purchase intent, including:

  • “10 yard dumpster”
  • “dumpster for rent”
  • “30 yard dumpster Arkansas”
  • “roll off dumpster rental near me”
  • “same day dumpster rental”

Dumpster rentals behave more like a utility than a discretionary purchase. Demand already exists, and paid search performs best when it captures that demand rather than attempting to manufacture interest.

Paid search was used to funnel users who were mostly ready to buy, not to resolve every question upfront. Once a caller reaches the phone, the conversation naturally expands.

Callers still ask about:

  • Pricing and availability
  • Delivery timing
  • Permit requirements
  • Weight limits and overage fees

Those questions are expected. They belong in the sales conversation, not in the keyword list. Search ads determined who called. The phone conversation handled what they needed.

By excluding question-based keywords from paid search and redirecting that intent elsewhere, costs fell without sacrificing lead quality.

Google Ads Case Study Keyword Negatives List

3. Manual CPC for Cost Control

Automated bidding strategies optimize for actions, not outcomes. In this case, the system was optimizing for phone calls regardless of whether those calls resulted in sales.

That meant automations bid aggressively on:

  • Job seekers
  • Competitor lookups
  • Information-only queries
  • General curiosity

Manual bidding restored control. We bid based on known commercial intent, not probabilistic signals.

Automation still has a role, but not when cost discipline is the priority.

$400 Cost/Conv and 1.48% Conversion Rate
Sitewide Conversion Rate Sep 2018 to Feb 2020 - 3.4% - $14,000 for 66 Phone Calls.

Why Negative Keywords Mattered So Much

Search queries signal where someone is in the decision process.

Someone searching “dumpster rental prices” is still comparing. Someone searching “dumpster rental Phoenix same day” is ready to order.

We focused spend on bottom-of-funnel intent and removed ambiguity from bidding decisions.

Lower intent queries weren’t discarded entirely, they became inputs for:

  • SEO content
  • Retargeting
  • Educational pages

Paid search stopped acting like a Q&A service and started acting like a sales channel.


Landing Page Optimization Multiplied the Gains

Lower CPC alone helps. Higher conversion rates multiply results.

The original landing page was a generic location page designed for organic search. It converted at 1.48% for paid traffic and produced phone calls at nearly $400 each.

Website Redesign Case study above the fold before and after
Website Redesign Case study above the fold before and after

Through A/B testing and iterative redesign:

  • Conversion rate increased to 26%
  • Call quality improved
  • Waste declined further

Above-the-fold changes mattered most:

  • No navigation menu
  • Clear product imagery
  • Trust signals and reviews
  • Immediate call clarity

This wasn’t cosmetic design. It was intent alignment.

Google Ads Case Study 26.06% Conversion Rate

End-to-End Attribution Confirmed the Outcome

Using CallRail and Salesforce, we tracked calls through to actual sales.

Bottom-of-funnel callers converted at a much higher rate than exploratory callers. The data confirmed what intuition already suggested, people who are ready to buy do not need convincing.


Final Outcome

Over roughly one year and $24,000 in ad spend, the account stabilized at a profitable $16.87 per qualified phone call, with more volume and better customers than before.

Adwords Yearly Review - Save Money on Google Ads
Adwords Yearly Review

The Numbers (Before vs After)

Cost Per Conversion

  • $284 → $16.87
  • 94.1% reduction

Cost Per Click

  • $13.88 → $4.27
  • 68.1% reduction (3.13× efficiency)

Conversion Rate

  • 3.41% → 26.06%
  • 764% improvement (7.64× lift)

Net Effect

3.13 × 7.64 = 23.9× more leads with the same budget

This wasn’t growth through spend. It was growth through structure.

This wasn’t about clever tactics.

It was about discipline.

The Takeaway

When you align:

  • Search intent
  • Bidding control
  • Landing page relevance

Costs fall, conversion rates rise, and growth becomes predictable.

That’s how this account achieved 23.9× more leads with the same budget, without chasing volume or relying on guesswork.

About the author

July 7, 2022
Lubble Team
July 7, 2022
Lubble Digital Marketing is a boutique, Denver-based paid search agency specializing in SEM and SEO for high-intent, service-driven businesses.
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