Is a Google ad agency worth it?
Is a Google Ads Agency Worth It?
The honest answer from someone who runs one.
Here’s what most agencies won’t tell you: it depends. Not on whether Google Ads works (it does), but on whether your business is set up to make it work.
Let me break it down properly.
The Short Answer
If you’re a service-based business turning over $10,000+ a month, and you don’t have time to manage ads, landing pages, and your sales process yourself yes, the right agency is worth it.
If you’re under that? You’re probably better off learning to do it yourself. And I say that as someone who runs an agency.
The Bit Most People Get Wrong: ROI vs ROAS
These are not the same thing, and confusing them is where businesses get burned.
Return on Ad Spend (ROAS) is what the ad platform tells you. You spent $1,000, you got $10,000 in revenue. Looks amazing, right?
Return on Investment (ROI) is what actually hits your bank account.
Here’s a real example. Say you’re a landscaper. An agency gets you $100,000 worth of jobs from Google Ads. Sounds incredible. But if your profit margin is 30%, that’s $30,000 in actual profit. Now subtract the ad spend, subtract the agency fee, subtract your time quoting jobs that didn’t convert, and suddenly that number looks very different.
The question isn’t “did the ads generate revenue?” It’s “did the ads generate profit after everything is accounted for?”
A good agency knows the difference. A bad one will wave the revenue number in your face and hope you don’t do the maths.
When a Google Ads Agency IS Worth It
You’re a service-based business. Plumbers, lawyers, mediators, training providers, accountants, tradies. High-value services where one new client can be worth thousands. Google Ads is close to a money printer for these businesses when it’s set up properly.
You don’t have time to do it yourself. And I don’t just mean the ads. I mean the landing pages, the conversion tracking, the testing, the ongoing optimisation. That’s a part-time job on its own.
The maths works in your favour. This comes down to one thing: your cost per sale versus your profit per sale. Say you spend $2,000 a month on ads and agency fees, and that generates 20 leads. Ten of those turn into paying customers. Your cost per sale is $200. Now — if your service is worth $2,000 and your profit margin is 50%, you’re making $1,000 profit per job, minus the $200 it cost to win them. That’s $800 net profit per customer, times ten. $8,000 in your pocket from a $2,000 spend. That works.
But flip it. If you’re charging $300 for a job and your cost per sale is $200, you’re making $100 per customer before you even account for your own time and overheads. That doesn’t work. The ads are “working” technically you’re getting leads, but the profit isn’t there to justify the spend.
Now here’s where it gets exciting. When the strategy, the landing pages, and the sales process are all dialled in — the cost per sale drops dramatically. We’re doing this right now with a client: cost per sale sitting around $10, with a minimum $300 return per customer. That’s not a typo. Ten dollars to acquire a paying customer worth three hundred. At that point, Google Ads isn’t a marketing expense. It’s a tap you turn on and money comes out.
That’s what happens when the whole system works together — the right keywords, a landing page that actually converts, and a follow-up process that doesn’t let leads go cold. Most businesses never get there because they’re only focused on the ads. The ads are the easy part.
This is why ROI and ROAS are different conversations. A 3x ROAS sounds great until you realise your margins ate most of it. But get your cost per sale low enough, and the ROAS conversation becomes irrelevant — you’re just printing profit.
You want someone who’s done it before in your industry. An agency with case studies in your niche (or close to it) will get results faster. They’ve already made the mistakes on someone else’s budget.
We work with service businesses, education providers, and trades clients. One of our mediation clients went from zero online presence to consistent leads across Australia within months. An RTO client saw 400% growth in student enrolments. Those results come from knowing the niche, not just knowing the platform.
When a Google Ads Agency is NOT Worth It
You’re launching a book. Unless it’s a very specific “how-to” book, search ads aren’t the play. Nobody is searching Google for your novel. Use social media, content marketing, or Amazon ads instead.
You’re an ecommerce store with thin margins. If you’re selling $30 products with a 15% margin, the maths gets brutal fast. Google Ads agencies tend to charge a minimum of $1,000-$2,000 a month in management fees. You need serious volume to make that work on low-margin products.
You’re turning over less than $10,000 a month. I know this sounds like a chicken-and-egg problem — you need clients to afford the agency, but you need the agency to get clients. The truth is, at that stage, you’re better off learning the fundamentals yourself. It’s not as complicated as agencies make it sound, and you’ll understand your own business better for it.
What a Good Agency Actually Does (That You Probably Can’t)
Most people think Google Ads is just… writing ads. Set up some keywords, write some headlines, press go.
That’s about 20% of it.
The other 80% is everything that happens after someone clicks your ad. And this is where most agencies — and most DIY advertisers — fall down.
Landing pages. Your ad sends someone to a page. That page needs to convert. Not your homepage. Not your “About Us” page. A dedicated landing page built to do one thing: get that person to take action. Every keyword group should have its own landing page with messaging that matches exactly what they searched for.
The sales process. What happens when someone fills in the form? Do they get an instant response? Is there a follow-up sequence? How quickly does someone call them back? We’ve seen businesses spend thousands on ads that work perfectly — and then lose the lead because nobody called them back for three days.
Conversion tracking. If you don’t know which keywords and ads are actually generating paying customers (not just clicks, not just form fills — actual customers), you’re flying blind. A lot of agencies set up basic tracking and call it a day. Proper tracking means you can tell Google exactly which clicks turned into money, so it can find you more of those people.
Ongoing optimisation. Google Ads isn’t set-and-forget. Keywords need pruning. Ad copy needs testing. Landing pages need tweaking. Budgets need reallocating based on what’s actually converting. This is where the ongoing value of an agency comes in — or where a lazy one costs you money by doing nothing after the initial setup.
How to Spot a Bad Agency
They talk about clicks and impressions instead of leads and revenue.
They lock you into long contracts.
They won’t show you what they’re spending your money on.
They use the word “synergy” unironically.
They do retargeting and display ads by default — which, for most service businesses, is just a sophisticated way of wasting your budget.
They can’t show you case studies or results from businesses like yours.
They charge you through the nose and your phone isn’t ringing any more than it was before.
If any of that sounds familiar, you’ve got the wrong agency.
How to Spot a Good One
They care about your results, not just your retainer.
They can explain where every dollar is going in plain English.
They understand your industry, your margins, and your sales process — not just the ad platform.
They build landing pages that actually sell, not just look pretty.
They track real outcomes: phone calls, form submissions, booked jobs, actual revenue.
They’re honest when something isn’t working and pivot quickly.
We operate on a low retainer plus a percentage of results. Because if we’re not generating a return, we shouldn’t be getting paid like we are. That model keeps us invested in your numbers, not just our own.
The DIY Option
If you’re not ready for an agency — or you want to understand Google Ads before handing it over — that’s a smart move.
Here’s what you need to learn:
Keyword research. What are people actually typing into Google when they need your service? Not what you think they’re searching. What they’re actually searching.
Ad copy that converts. This is part creativity, part psychology. You need to interrupt someone’s scroll, mirror their problem back to them, and give them a reason to click your ad instead of the other three on the page.
Landing pages. This is the part most people skip, and it’s the part that matters most. A dedicated page with a clear headline, a clear offer, proof that you’re legit, and one obvious action to take.
Conversion tracking. Set it up properly from day one. If you can’t measure it, you can’t improve it.
Your sales process. What happens after the lead comes in? Speed matters. Follow-up matters. Having a system matters.
We actually have a Google Ads course that covers all of this, including how to build landing pages and set up proper tracking. Because honestly, if you understand the fundamentals, you can get results on your own — especially if you’re just starting out.
The Bottom Line
A Google Ads agency is worth it when:
- You’re a service business with healthy margins
- You’re turning over $10,000+ a month
- You don’t have time to manage it yourself
- The agency actually cares about your results
- They understand your industry
A Google Ads agency is NOT worth it when:
- You’re in ecommerce with thin margins
- You’re under $10,000/month revenue
- The agency can’t show you case studies in your niche
- You’re paying for activity, not outcomes
- They can’t explain what they’re doing in plain English
The ads are just one piece. It’s the landing pages, the tracking, the sales process, and the ongoing optimisation that turn ad spend into actual profit.
Choose carefully. Ask hard questions. And if they say “synergy,” run.