Google Ads is one of the fastest ways to get your business in front of people actively searching for what you offer. But "fast" does not mean "easy" or "cheap". For every business getting a 5x return on their ad spend, there is another burning through budget with nothing to show for it.
When Google Ads works well
Google Ads works best when three conditions are true:
1. People are actively searching for what you sell. If nobody searches for your service, there are no clicks to buy. 2. Your average customer value justifies the click cost. A plumber paying $15 per click to win a $500 job has very different economics to a cafe paying $3 per click for a $12 lunch. 3. Your website can convert the traffic. Sending paid traffic to a slow, confusing, or untrusted website is the most common way businesses waste their Google Ads budget.
Local service businesses - tradies, lawyers, accountants, medical practices - tend to see the best returns because search intent is high, customer values are substantial, and competition is often localised.
How to calculate if it is worth it
Here is a simple way to estimate your Google Ads ROI before you spend anything:
1. Find the average cost per click for your keywords using Google Keyword Planner. 2. Assume a 3-5% conversion rate on your website (industry average for local services). 3. Calculate your cost per lead: if clicks cost $10 and 3% convert, each lead costs $333. 4. Estimate your close rate: if you convert 1 in 3 leads, each customer costs $1,000 in ad spend. 5. Compare that to your average customer value.
If a new customer is worth $2,000+ over their lifetime, that $1,000 acquisition cost is excellent. If your average sale is $50, the numbers do not work. This is basic maths, but surprisingly few businesses do it before spending on ads.
The most common mistakes
After managing Google Ads for dozens of local businesses, the same mistakes come up repeatedly:
- Targeting too broadly. "Plumber Australia" will drain your budget. "Emergency plumber Ipswich" will get you jobs. - Not tracking conversions. If you do not know which clicks become phone calls and form submissions, you are flying blind. - Sending traffic to your homepage instead of a dedicated landing page. Each ad group should link to a page specific to that service. - Set and forget. Google Ads needs weekly attention - adjusting bids, pausing underperforming keywords, testing new ad copy. - No negative keywords. Without them, you will pay for irrelevant searches like "plumber jobs" or "plumber salary".
What budget do you need?
For most local businesses in Australia, a reasonable starting budget is $1,000 to $2,000 per month in ad spend, plus management fees. This is enough to generate meaningful data and leads in most markets.
Below $500/month, you generally do not get enough clicks to learn what works. Above $5,000/month, you need sophisticated tracking and attribution to ensure you are not scaling waste.
Start small, track everything, and scale what works. That is the formula.
Google Ads vs SEO
Google Ads and SEO are not either/or - they serve different purposes. Ads give you immediate visibility and are great for testing which keywords convert. SEO builds sustainable traffic over months and years.
The smartest approach is to use Google Ads to generate leads while your SEO builds momentum. Once your organic rankings are strong, you can reduce ad spend on keywords where you already rank well and reallocate to new opportunities.
If you can only afford one, and you need leads this month, start with Google Ads. If you are playing the long game, invest in SEO.