Google Ads budget for a service business: how much to spend
Instead of guessing a monthly number, build the Google Ads budget backwards from your goals and adjust it with real data from the first weeks.
In summary
- There is no standard Google Ads budget: it depends on your competition, your area and what a customer is worth to you.
- Work it out backwards: customers wanted, close rate, enquiries needed, cost per enquiry.
- Start focused on one service and one area, so the budget produces data you can act on.
- Judge the budget by cost per customer and review it on a fixed date, not after a few days.
How much should a service business spend on Google Ads?
A service business should set its Google Ads budget backwards from its goals: decide how many new customers it wants a month, divide by its close rate to get the enquiries needed, and multiply by the real cost of an enquiry in its market. There is no universal number, because the cost of a click depends on how many businesses compete for the same searches in the same area.
Any fixed figure you read online is a guess about someone else's market. A busy city and a small town, or a high-value service and a low-value one, produce very different costs for the same keyword. The useful question is how much your business needs to spend to reach a specific goal, and whether that amount makes sense against what a customer is worth.
Why does the cost of Google Ads vary so much?
Google Ads is an auction. Each time someone searches, Google decides which ads to show and in what order, based on what advertisers bid and on the quality and relevance of their ads and landing pages. You pay when someone clicks. The price of that click moves with competition, with your Quality Score and with how specific the search is.
- Competition: more businesses bidding on the same terms in the same area push costs up.
- Intent: searches that signal hiring now tend to cost more, and are usually worth more.
- Relevance: an ad and a landing page that match the search well can lower what you pay for the same position.
- Geography: a metro area usually costs more than a smaller market.
How do you calculate a Google Ads budget?
- Decide how many new customers a month you want from Google Ads.
- Estimate your close rate: out of every enquiry, how many become customers. Use your CRM if you have one.
- Divide the customers wanted by the close rate to get the enquiries you need.
- Estimate the cost per enquiry. Use the forecast in the Google Ads Keyword Planner as a starting range, then replace it with your own data after the first weeks.
- Multiply the enquiries needed by the cost per enquiry. That is your starting monthly budget, in Canadian dollars.
Then check the result against the value of a customer. If the budget needed is higher than what a customer is worth to you, the problem is not the budget. It is the close rate, the price or the offer, and that is where to work first.
How do you make a small budget work?
A budget spread across many services, areas and keyword themes buys a little of everything and teaches you nothing. Start with the service that matters most, the area you really serve and keywords that show intent to hire. Expand once you know what a customer costs there.
- One campaign per service, so each has its own budget, keywords and landing page.
- Locations set to where you work, with the location option set to people who are in or regularly in those places, not people merely interested in them.
- An ad schedule that matches when someone can answer the phone or WhatsApp.
- Negative keywords added every week from the search terms report, to stop paying for searches that are not buyers.
- Conversion tracking for forms, calls and WhatsApp clicks before the first dollar is spent.
How long until you know whether the budget works?
The first weeks are for learning, both for you and for Google's automated bidding, which needs conversions to optimize. Judging a campaign after a few days usually means judging noise. Set a review date in advance, keep the budget and the settings steady until then, and decide with the data. The more enquiries a week, the sooner the data is reliable.
What does the ad budget not include?
Ad spend is paid directly to Google. If an agency manages the account, its fee is separate and should be agreed separately. Landing pages, tracking and the CRM that records each enquiry are other pieces of the system. Without them you cannot tell which part of the spend became revenue.
why ads get clicks but no customerswhat a landing page for paid ads needs
What are the most common budget mistakes?
- Choosing a number because it feels affordable, without checking it can produce enough enquiries.
- Splitting a small budget across Google and Meta at the same time.
- Leaving broad match keywords running without reviewing search terms.
- Changing bids and budgets every few days, which resets what the system learned.
- Measuring success by clicks or impressions instead of customers.
FAQ
Frequently asked questions
Is there a minimum budget for Google Ads?
Google does not set one. The practical minimum is the amount that produces enough clicks and enquiries to learn from in your market, which is why the backwards calculation matters more than a fixed figure.
Should Google Ads run on evenings and weekends?
Only if someone, or an AI agent, can answer the enquiries that arrive then. An enquiry that waits until Monday is often lost to a competitor who replied first.
How long until I know if the budget works?
It depends on volume: the more enquiries a week, the sooner you can judge. Set a review date in advance and avoid changing everything in the first days.
Is the agency fee part of the ad budget?
No. Ad spend goes to Google and the management fee is separate. Agree on both before starting, in writing.
Should I use the Keyword Planner estimate as my budget?
Use it as a starting range, not as a promise. Replace the estimate with your real cost per enquiry as soon as you have a few weeks of data.
Next step
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