One of the most common questions businesses ask when starting with Google Ads is:
“How much should I spend?”
Many people assume you need a huge budget to run Google Ads successfully. In reality, a lot of businesses actually overspend because they try to target too many keywords or compete in very broad markets.
With the right keyword strategy and a focused campaign structure, it is often possible to run effective Google Ads campaigns with a relatively modest budget.
In this guide, we will look at how to estimate the right budget for your campaign and why being selective with keywords can often reduce costs significantly.
If you are still setting up your account, you may also find it useful to read my guide on how to set up your first Google Ads search campaign.
Key takeaways
- Many small businesses can start Google Ads with a test budget of £300 to £500 per month by focusing on specific local keywords instead of broad, expensive terms.
- At an average cost per click of £3, a £300 monthly budget buys around 100 clicks, which at a 5% to 10% conversion rate could produce 5 to 10 enquiries.
- Specific, location-focused keywords such as ‘boiler repair basingstoke’ tend to be cheaper and more relevant than broad terms like ‘plumber’, so you do not need to appear on every search.
- Keyword selection, advert quality, landing page experience and conversion tracking often affect Google Ads results more than the size of the budget.
- Increase a Google Ads budget when the campaign is limited by budget, cost per conversion is profitable and impression share is low for your best keywords.
Why Many Businesses Overspend on Google Ads
A common mistake is trying to appear for every possible search related to your industry.
For example, a local service business might attempt to bid on very broad keywords such as:
- plumber
- accountant
- wedding venue
- marketing agency
These keywords tend to be highly competitive, which means the cost per click can be significantly higher.
Instead, successful campaigns often focus on more specific and targeted keywords, which can attract people who are further along in the buying process.
You Do Not Need to Appear on Every Search
Another important thing to understand about Google Ads is that you do not need to appear for every single search.
Many businesses assume that if their advert is not showing all the time, the campaign is failing.
In reality, Google Ads works best when you focus on searches that are most relevant to your business.
For example, instead of targeting:
- plumber
you might focus on:
- emergency plumber basingstoke
- boiler repair basingstoke
- local gas engineer near me
These searches are usually more relevant and often cheaper because they are more specific.
This approach helps ensure that your budget is spent on the searches that are most likely to generate enquiries.
Example Keyword Research
Below is a simple example of how keyword costs can vary.
| Keyword | Avg Monthly Searches | Estimated CPC |
|---|---|---|
| plumber | 12,000 | £8.50 |
| plumber near me | 5,400 | £6.80 |
| emergency plumber basingstoke | 320 | £3.40 |
| boiler repair basingstoke | 210 | £3.10 |
| gas engineer basingstoke | 170 | £2.90 |
Example figures only; costs vary by industry and location.
The more specific and location-focused keywords tend to have lower competition and lower cost per click.
They also tend to attract users who are actively looking for a service right now.
Example Monthly Budget Calculation
Let’s assume your average cost per click is around £3.00 for targeted local keywords.
With a £300 monthly budget, this would roughly allow for:
£300 budget ÷ £3 CPC = around 100 clicks per month
If your website converts at around 5% to 10%, this could produce:
- 5 to 10 enquiries per month
For many small businesses, this can already make the campaign worthwhile.
The key is making sure the traffic is high intent and relevant, rather than just driving large amounts of clicks.
Starting Small Is Often the Best Approach
One of the advantages of Google Ads is that campaigns can be scaled gradually.
Instead of starting with a large budget straight away, many businesses begin with a smaller test budget, such as:
- £300 per month
- £400 per month
- £500 per month
This allows you to gather real data and see:
- which keywords perform best
- which ads generate clicks
- which searches lead to enquiries
Once the campaign is performing well, budgets can then be increased to capture more traffic.
Budget Works Alongside Your Keyword Strategy
Budget alone does not determine the success of a campaign.
The following factors often have a bigger impact:
- keyword selection
- advert quality
- landing page experience
- conversion tracking
Choosing the right keywords and writing clear adverts can often reduce wasted spend and improve the overall performance of the campaign.
If you want to improve your ads further, you may also want to read my guide on how to write good Google Ads.
When to Increase Your Budget
Once your campaign is generating consistent enquiries, increasing the budget can help capture additional searches.
Signs that you may want to increase your budget include:
- your campaign is limited by budget
- your cost per conversion is profitable
- impression share is low for your best keywords
At this stage, scaling the campaign can help generate more leads while maintaining efficiency.
Related guides: How to Set Up Your First Google Ads Search Campaign and How to Find Keywords for Google Ads.
Getting Help With Google Ads Strategy
Budget planning is just one part of running a successful Google Ads campaign. Proper campaign structure, keyword selection, and conversion tracking are equally important.
If you are looking for help improving your campaigns, you can learn more about my services as a Hampshire PPC consultant.
You can also see more details about my PPC consultancy services.
Need help with your Google Ads?
If you’re dealing with an account problem, want a second opinion or need practical PPC support, tell me what you need help with. I’ll reply by email first and let you know whether I can help. You can also select Google Ads review / audit on the form if you’d like a free account review.
If you are still preparing the account, check Google Ads billing and payment requirements before launch. For help turning the budget into a wider business plan, see marketing consultancy.