How Much Does Google Ads Cost? Budget Calculation for Belgian SMEs

You're considering getting started with Google Ads, but the first question that comes to mind is naturally: how much is it going to cost me? The honest answer is that it depends on numerous factors. In this article, we explain how Google Ads pricing works, what influences costs, and how you as a Belgian SME can calculate a realistic budget.

How Does Google Ads Pricing Work?

Google Ads operates on an auction model. You don't pay a fixed price per click. Instead, you bid on keywords. Every time someone types in a search query that matches your keywords, an auction takes place.

The Auction Process in Brief

1. You set a maximum bid, which is the maximum amount you're willing to pay per click (CPC)
2. Google reviews all bidders competing on the same keyword
3. Your Ad Rank is calculated as a combination of your bid, your Quality Score, and the expected impact of your ad extensions
4. The winner pays just enough to beat the advertiser below you, not their full maximum bid

This means you often pay less than your maximum bid. The system rewards advertisers who create relevant, high-quality ads.

CPC, CPM, and CPA: The Different Cost Models

• CPC (Cost Per Click): you pay per click on your ad. This is the most commonly used model for Search campaigns.
• CPM (Cost Per Mille): you pay per 1,000 impressions. Primarily used for Display and YouTube campaigns focused on brand awareness.
• CPA (Cost Per Acquisition): you optimise for conversions. Google automatically adjusts your bids to achieve as many conversions as possible within your budget.

Which Factors Determine Your Google Ads Costs?

Google Ads costs vary enormously. Here are the key factors that influence your cost per click:

1. Industry and Competition

The sector you operate in has the biggest impact on your costs. In highly competitive markets such as insurance, legal services, or financial products, CPCs are significantly higher than in niche markets.

Typical CPC ranges per sector in Belgium:

• B2B services have a broad spectrum depending on the niche
• E-commerce (fashion, accessories) is generally lower due to high search volume
• Legal and financial tends to be higher due to intense competition and high customer value
• Local services (plumber, electrician) sits mid-range, strongly determined by region
• Hospitality and tourism shows seasonal fluctuations

2. Quality Score

Google evaluates the quality of your ads, keywords, and landing pages with a score from 1 to 10. A higher Quality Score means lower cost per click (Google rewards relevance), better positions where you can rank higher than competitors who bid more, and more impressions since your ads are shown more frequently.

The Quality Score is determined by three factors:

• Expected CTR: how likely is it that someone will click?
• Ad relevance: how well does your ad match the search query?
• Landing page experience: is your landing page relevant, fast, and mobile-friendly?

3. Geographic Targeting

In Belgium, you're dealing with a unique market dynamic. You can target:

• All of Belgium
• Specific regions (Flanders, Wallonia, Brussels)
• Provinces or even cities

The more specifically you target, the smaller the competition (and often the costs). Local campaigns in smaller cities are typically cheaper than broad national campaigns.

4. Keyword Selection

Not all keywords cost the same:

• A broad keyword like "buy shoes" has high volume, more competition, and higher costs
• A long-tail keyword like "red women's running shoes size 39" has lower volume and less competition, but a higher conversion rate

Pro tip: Long-tail keywords are often the smartest choice for SMEs. You reach people who know exactly what they're looking for and therefore convert more quickly.

5. Timing and Seasonality

Costs also fluctuate based on:

• Seasons, with retail seeing higher CPCs around holidays
• Day of the week, since B2B ads are more expensive on weekdays
• Time of day, where peak hours cost more than nighttime hours

How Do You Calculate a Realistic Starting Budget?

Now that the theory is clear, let's get practical. Here's a step-by-step method to calculate your starting budget:

Step 1: Define Your Goal

What do you want to achieve?

• Generate leads: how many leads do you need per month?
• Boost sales: what is your desired revenue through Google Ads?
• Brand awareness: how many people do you want to reach?

Step 2: Research Your Average CPC

Use the Google Keyword Planner (free in your Google Ads account) to view the estimated CPC for your keywords. Create a list of your 10-20 most important keywords and note the average CPC.

Step 3: Estimate Your Conversion Rate

An average conversion rate for Google Ads Search campaigns falls between 2% and 5%, depending on your industry and the quality of your landing page.

Step 4: Calculate Backwards

Say you need 20 leads per month:

• With a conversion rate of 3%, you need 667 clicks (20 / 0.03)
• At an average CPC based on your researched keywords, you can calculate your monthly budget

Step 5: Start Small and Scale Up

Never start with your maximum budget. Begin with a test budget over 2-3 months. Use this period to:

• Learn which keywords perform best
• Improve your Quality Score
• Optimise your landing pages
• Collect data for smarter decisions

Common Budget Mistakes

1. Giving Up Too Quickly

Google Ads needs data to learn. The first few weeks are an investment period. Many businesses stop too early and miss the point where campaigns become profitable.

2. Spreading Budget Across Too Many Campaigns

With a limited budget, it's better to do one or two campaigns well than ten campaigns half-heartedly. Focus on your most profitable products or services.

3. No Conversion Tracking

Without conversion tracking, you're flying blind. You don't know which keywords, ads, or campaigns are actually generating customers. Invest in proper tracking first before increasing your budget.

4. Only Looking at Costs

The question isn't "how much does it cost?" but "how much does it return?" A €5 click that delivers a €500 customer is an excellent investment.

Every Business Is Different

We can't provide a standard price list, and frankly, be wary of agencies that do. Every business has a unique situation: your market, competition, objectives, website, and offering together determine what the right budget is.

What we can do is conduct a thorough analysis of your market and opportunities. At Saerens Advertising, we always start with a free audit where we review your current situation, analyse your competition, and make a realistic proposal based on data, not on assumptions.

Curious about what a realistic Google Ads budget for your business looks like? Request a free audit and we'll calculate it together.