Why Is My CPC in Google Ads High?

Alexandre Airvault
February 4, 2025
Many businesses experience high cost-per-click (CPC) rates in Google Ads and wonder why this happens. Understanding the factors that contribute to high CPC is crucial for managing and optimizing your ad spend effectively. This article outlines the main reasons behind high CPC and offers practical solutions to help you reduce costs and maximize your advertising efforts.

Factors Contributing to High CPC

1. Competitive Keywords

The level of competition for a keyword directly impacts its cost-per-click (CPC). When many advertisers bid on the same keyword, it drives up the price. For example, a keyword like "emergency plumbing services" may have a high CPC due to its competitive nature, as multiple plumbing companies vie for the top ad positions.

According to a study by WordStream, the average CPC for the plumbing industry is $6.40, with top keywords like "plumber" and "plumbing services" reaching up to $25 per click.

2. Low Quality Score

Google assigns a Quality Score to each keyword in your ad groups, ranging from 1 to 10. This score assesses the relevance and quality of your ads, keywords, and landing pages. A low Quality Score (typically below 5/10) can significantly increase your CPC.

For instance, if your keyword has a Quality Score of 3/10, you may need to pay twice as much per click compared to a competitor with a Quality Score of 6/10. Improving your Quality Score from 3/10 to 6/10 can reduce your CPC by up to 50%.

3. Ineffective Ad Targeting

Inaccurate targeting can lead to your ads being shown to the wrong audience, resulting in low click-through rates (CTR) and high CPC. If your ads are not reaching the right people, they are less likely to be clicked, which can drive up your costs.

For example, if a plumbing company targets a broad keyword like "plumbing" without specifying their service area, their ads may be shown to users searching for plumbing services in different cities or even countries. This ineffective targeting can lead to a CTR below 1%, which can increase CPC by up to 400% compared to a well-targeted ad with a CTR of 4% or higher.

4. Lack of Negative Keywords

Negative keywords help exclude irrelevant search terms from triggering your ads. Without a comprehensive list of negative keywords, your ads may appear for searches unrelated to your business, leading to wasted ad spend and higher CPC.

For instance, a plumbing company offering emergency services should add negative keywords like "DIY," "tutorial," and "how-to" to prevent their ads from showing up for users looking for plumbing guides rather than professional services. By reducing irrelevant clicks, negative keywords can improve CTR and lower CPC by up to 30%.

5. Suboptimal Ad Scheduling

Running your ads during ineffective times can result in low CTR and high CPC. By analyzing your ad performance data and identifying the best days and hours for your target audience, you can optimize your ad scheduling to maximize ROI.

For example, a plumbing company may find that running ads during business hours (9 AM to 5 PM) on weekdays yields the highest CTR and lowest CPC. By focusing their ad budget on these peak times and reducing spend during low-performing hours (like 3 AM), they can potentially decrease CPC by up to 20% [4].

Example Scenario: Local Plumbing Company

Let's consider a local plumbing company struggling with high CPC. They are bidding on competitive keywords like "emergency plumbing services" and "24/7 plumber," which have an average CPC of $15. Their Quality Score is 3/10, and they are targeting a broad audience without specific ad schedules or negative keywords.

To reduce their CPC, the plumbing company can take the following steps:

  1. Improve ad relevance and landing page experience to increase Quality Score from 3/10 to 6/10, potentially reducing CPC by 50%.
  2. Refine targeting by adding location-specific keywords (e.g., "plumber in [city name]") and demographics to reach the right audience, improving CTR from 1% to 4% and lowering CPC by up to 400%.
  3. Implement negative keywords like "DIY" and "tutorial" to avoid irrelevant clicks, reducing wasted spend by 30%.
  4. Optimize ad scheduling to focus on peak hours (9 AM to 5 PM) and high-performing days (weekdays), potentially decreasing CPC by 20%.

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Practical Steps to Lower CPC in Google Ads

1. Keyword and Ad Relevance Improvements

Improving the relevance of your keywords and ads is a crucial step in reducing your cost-per-click (CPC). Here's how to do it:

  • Refining keyword targeting: Conduct thorough keyword research to identify high-performing, relevant keywords. Use tools like the Google Ads Keyword Planner to find keywords with lower competition and higher relevance to your business.
  • Optimizing ad copy and landing pages: Ensure your ad copy and landing pages are highly relevant to your targeted keywords. Include the main keyword in your ad headline, description, and URL. Create compelling, clear ad copy that highlights your unique value proposition.
  • Utilizing negative keywords: Add negative keywords to your campaigns to prevent your ads from showing for irrelevant searches. This helps improve your click-through rate (CTR) and Quality Score, ultimately lowering your CPC.
  • Adjusting ad scheduling: Analyze your campaign data to identify days and times when your ads perform best. Adjust your ad scheduling to prioritize showing ads during these high-performing periods, which can help reduce your overall CPC.
  • Monitoring and adjusting bids: Regularly monitor your keyword bids and adjust them based on performance. Reduce bids on keywords with high CPC and low conversion rates, and increase bids on keywords that drive valuable conversions at a lower cost.

2. Advanced Optimization Techniques

Once you've implemented the basic optimization strategies, consider these advanced techniques to further reduce your CPC:

  • Use of exact and phrase match keywords: Utilize exact and phrase match keywords to better control the searches your ads appear for. This can help improve your ad relevance and click-through rate, leading to a lower CPC.
  • Geographic targeting adjustments: Analyze your campaign performance by geographic location. Identify regions with lower CPC and higher conversion rates, and prioritize your ad spend in these areas.
  • Ad scheduling tweaks: In addition to focusing on high-performing days and times, consider adjusting your bids based on ad schedule. Increase bids during peak performance periods and decrease them during low-performing times to optimize your CPC.
  • Implement automated bidding strategies to optimize your CPC based on your specific goals.