You’re spending money on Google Ads every month. But when someone asks whether it’s working, do you actually know the answer?
Most business owners running Google Ads can tell you their cost-per-click or their monthly ad spend. Far fewer can tell you what that spend is generating in return. That’s where ROAS comes in. It’s the metric that cuts through the noise and tells you, in plain terms, whether your Google Ads investment is paying off.
This guide covers what ROAS is, how to calculate it, what a good number looks like in Australia, and what to do when yours isn’t where it should be.
Quick Summary
- ROAS (Return on Ad Spend) measures how much revenue you earn for every dollar spent on ads
- The formula is simple: revenue from ads divided by ad spend
- ROAS is not the same as ROI, it doesn’t account for margins, overheads, or agency fees
- Your ROAS figure is only reliable if your conversion tracking is set up correctly
- A “good” ROAS depends on your margins; calculate your break-even number before benchmarking
- Low ROAS is usually caused by poor landing pages, broad targeting, the wrong bidding strategy, or attribution issues
Already running Google Ads and not sure if the numbers stack up? Request a free Google Ads review from the Ape-X team and we’ll take a look.
What Is ROAS?
ROAS stands for Return on Ad Spend. It measures how much revenue you generate for every dollar you put into Google Ads.
The formula is straightforward:
ROAS = Revenue from Ads / Ad Spend
So if you spent $2,000 on Google Ads in a month and those ads generated $8,000 in revenue, your ROAS is 4. That’s often written as 4:1 or expressed as 400%.
That’s it. The maths is simple. The challenge isn’t calculating ROAS it’s making sure you’re measuring the right numbers on both sides of that equation.
ROAS vs ROI: Understanding the Difference
These two metrics are often confused, and it matters that you know which one you’re looking at.
ROAS measures revenue against ad spend only. It doesn’t account for your cost of goods, overheads, staff, or agency fees. It tells you how much the ads are bringing in relative to what you spent on them directly.
ROI (Return on Investment) measures net profit against total investment. It factors in everything: your product costs, fulfilment, management fees, and any other expenses tied to running the campaign.
A campaign might have a strong ROAS of 5:1 but a poor ROI once you subtract a 60% cost of goods and a management fee. Both numbers matter, but they tell you different things.
For day-to-day Google Ads performance monitoring, ROAS is the faster, cleaner signal. ROI is the number you use when evaluating whether the channel itself is worth continuing.
Why ROAS Only Works When Conversion Tracking Does
Here’s a problem that’s more common than most business owners realise: they check their ROAS in Google Ads and see a strong number, but their actual revenue tells a different story. The reason is almost always broken or incomplete conversion tracking.
ROAS in Google Ads is only as accurate as the conversion data being fed into it. If your conversions aren’t tracked correctly, the number is meaningless.
Before you trust your ROAS figure, check that:
- Conversion tracking is set up in Google Ads (not just GA4)
- Your conversion actions are tracking actual revenue, not just page visits or button clicks
- You’re using the correct attribution model for your business (last click vs data-driven can produce very different ROAS figures)
- If you’re an ecommerce business, dynamic conversion values are pulling through actual transaction amounts rather than a fixed estimated value
If you’re not sure whether your tracking is set up correctly, this is worth getting right before drawing any conclusions from your ROAS data. An agency review can identify tracking gaps quickly. Request a free Google Ads review from the Ape-X team if you want a second set of eyes on your account.
What Is a Good ROAS in Australia?
This is the question every business owner asks, and the honest answer is: it depends on your margins.
A 3:1 ROAS might be wildly profitable for a software business with 80% margins. The same number would be a disaster for a retailer running on 20% margins. The break-even ROAS, the point at which your ad spend is just covering its own cost, is different for every business.
To find your break-even ROAS:
Break-Even ROAS = 1 / Gross Margin
So if your gross margin is 40%, your break-even ROAS is 2.5. Anything above that is profitable. Anything below it means you’re losing money on every sale driven by ads.
That said, general benchmarks are useful as a starting point. Across Australian businesses running Google Ads, a ROAS of 3:1 to 5:1 is commonly cited as a healthy range for most industries. Some high-margin categories like professional services or software can sustain lower ROAS targets because the profit per conversion is higher. Ecommerce businesses, where margins are thinner and competition is fierce, often need to hit 4:1 or higher to stay profitable.
The most important benchmark is your own break-even number, not an industry average.
How to Check Your ROAS in Google Ads
Finding your ROAS in the Google Ads interface is straightforward once conversion tracking is in place.
- Log into your Google Ads account
- Go to Campaigns, Ad groups, or Ads depending on which level you want to analyse
- Click the Columns icon and add “Conv. value / cost” to your metrics view
“Conv. value / cost” is Google’s way of displaying ROAS. A value of 4.2 means a ROAS of 4.2:1.
You can view this at the campaign level to compare performance across different campaigns, at the ad group level to identify which product or service categories are driving returns, and at the keyword level to find your highest and lowest performing search terms.
For a broader picture of Google Ads performance and what the metrics in your account actually mean, our Google Ads foundations guide covers the key concepts in plain language.
Why Your ROAS Might Be Lower Than It Should Be
If your ROAS isn’t where you want it, the cause usually falls into one of a few categories.
Poor landing page experience
Your ad might be generating clicks, but if the page those clicks land on isn’t built to convert, the revenue won’t follow. A slow page, a confusing layout, a weak call to action, or a message that doesn’t match what the ad promised will all drain your ROAS.Landing page quality also affects your Google Ads Quality Score, which directly influences your cost-per-click. A low Quality Score means you’re paying more per click than you should, which compresses your ROAS from both sides: higher costs and lower conversion rates.
Here’s an example of what a high-converting landing page looks like in practice.
Broad or poorly structured targeting
If your campaigns are targeting keywords that are too broad, you’re likely paying for clicks from people who have no intention of buying. Wasted spend on irrelevant traffic is one of the fastest ways to destroy a ROAS figure. Reviewing your search terms report and adding negative keywords regularly is a basic but high-impact fix.
Incorrect bidding strategy
Google’s automated bidding strategies like Maximise Conversions or Target ROAS can work well, but they need enough conversion data to learn from. Google generally recommends at least 50 conversions per month before switching to Target ROAS bidding. Below that threshold, automated bidding often underperforms manual CPC because the algorithm is making decisions without a reliable data set. Moving to smart bidding too early is a common mistake in newer or lower-volume accounts.
Attribution issues
The attribution model you’re using determines how credit for a conversion is distributed across a customer’s journey. Last-click attribution assigns all credit to the final click before a purchase, which can inflate the apparent ROAS of bottom-of-funnel campaigns while undervaluing the campaigns that first introduced customers to your business. Switching to data-driven attribution, available once you have sufficient conversion volume, gives a more accurate picture of what’s actually driving results.
A Practical Checklist for Improving ROAS
If your ROAS needs work, start here before making any major changes to your campaigns:
- Confirm conversion tracking is accurate and recording revenue values correctly
- Calculate your break-even ROAS so you have a clear target to work towards
- Review the Search Terms report and add negative keywords for irrelevant traffic
- Check landing page load speed using Google PageSpeed Insights and fix any critical issues
- Audit message match between your ads and the pages they lead to
- Review Quality Scores at the keyword level and address any scores below 5
- Identify your lowest-performing campaigns and either pause, restructure, or reduce budget on them
- If using automated bidding, check whether your account has enough conversion volume to support it
Small, methodical improvements across these areas will compound. ROAS rarely improves dramatically overnight, but consistent attention to these levers will move the number in the right direction.
When to Get a Professional Review
Managing ROAS effectively means staying on top of search terms, bid adjustments, ad copy testing, landing page performance, and attribution. For most business owners, the time cost of doing this well outweighs the benefit of managing it themselves.
If your ROAS has been flat or declining for more than two to three months, or if you’re unsure whether your conversion tracking is giving you accurate data, it’s worth getting an independent review.
Understanding what Google Ads management costs in Australia is a useful starting point. Our guide to Google Ads management pricing breaks down what agencies charge and what you should expect for your investment.
If you’d like the Ape-X team to review your account and identify where your ROAS is being lost, request a free Google Ads review here. We’ll assess your tracking setup, campaign structure, and landing page performance and give you a clear picture of where the gaps are.
