How Much Should a Small Business Spend on Google Ads Per Month in Australia?

The honest answer most agencies won't give you: a small business in Australia should spend roughly 5–15% of its monthly gross profit on Google Ads — and only enough to win the number of new customers it actually needs. There is no single right dollar figure. The number is wrong until you tie it to your margin and your goals.

Most owners spend either A$0 or A$5000 a month, and almost nobody lands in the sensible middle. The reason isn't lack of willingness — it's that nobody tells them what the sensible middle is, and the platforms are happy to keep it that way. We run Google Ads for Australian small businesses on a flat, published management fee, so we have no reason to push your spend higher than it should be. Here is how we'd actually work it out with you.

The headline number is useless without context

You could spend A$500 and lose money. You could spend A$3000 and own your market. The monthly budget only matters against three numbers: your gross margin, how many customers you're already getting, and what a customer is actually worth to your business over a year.

Picture a salon doing blowouts at A$65 on a 60% margin — that's A$39 of margin per service, and the business lives on repeat traffic. Now picture a plumber whose emergency call nets A$340 in margin per job, with a happy customer returning a few times a year. The salon's sensible Google Ads spend is far lower than the plumber's, even on the same street. Your unit economics determine the floor and ceiling — not your industry, not your postcode, and definitely not what a competitor is rumoured to spend.

As a rule of thumb, we rarely recommend under A$300 per month or over A$4000 for a local service business. Below A$300, your budget is spread so thin across keywords that Google's system never gets enough data to optimise. Above A$4000, you're usually fighting diminishing returns in a typical Australian metro area unless you cover a wide region or sell high-ticket work. That's a range, not a target — most businesses sit well inside it.

The only question that matters first

Don't ask "how much should I spend?" Ask instead: "How many new customers do I need each month to stay profitable?" Once you know that, the budget falls out of the maths.

Picture a pool-cleaning business in Ipswich. It charges A$95 per clean on a 70% margin (A$66.50 of margin per job), with 40 existing fortnightly customers — about A$2660 of margin a month. If roughly half of those churn over a year, the owner needs around three new customers a month just to stand still. So the real budgeting question isn't "what's a click cost?" — it's "what would I happily pay to win three customers, given each one is worth A$66.50 a clean, many times over?" Whatever your cost per customer turns out to be in your account, multiply it by three and you have your starting budget.

Now contrast that with a Brisbane accountant selling tax-return prep at A$1200 on an 85% margin — about A$1020 of gross profit per return. That owner only needs one or two clients a month to make the channel pay for itself comfortably, so they can justify a higher budget per customer and treat everything past break-even as profit. Same city, wildly different budgets, purely because the unit economics differ. The lesson: work from your own numbers, never from a headline "average cost per click" you read somewhere.

Revenue and margin dictate the budget range

Here's the framework most businesses get backwards: they reverse-engineer from what competitors are "probably spending" instead of working from their own numbers.

Your monthly budget should sit between 5–15% of your monthly gross profit — not revenue. Say a tradie business turns over A$40k a month at a 55% margin (A$22k gross profit): that justifies roughly A$1100–3300 a month on Google Ads. A retail shop on A$80k revenue at a 35% margin (A$28k gross) justifies about A$1400–4200. Those ranges assume Google Ads is your only paid channel — if you're also running Meta Ads, you split that budget across both.

The lower end (5%) suits businesses with strong word-of-mouth, a solid existing customer base, or high customer lifetime value. The upper end (15%) suits competitive markets, low-margin volume plays, or businesses deliberately trying to scale fast. The maths is the same; where you sit in the band is a judgement call about how aggressively you want to grow.

One more thing the band buys you: room to scale without panic. Picture a property-management firm at A$1200 a month with a monthly gross margin of roughly A$8400. Lifting spend to A$2400 is still well inside the 5–15% band, so it can test a bigger budget — and a bigger budget gives Google's system more to learn from — without ever overcommitting. The point isn't any exact figure; it's that the band keeps you scaling within your means.

When A$0 is actually the right call

Stop. If you haven't sorted your own website, Google Business Profile, or customer-referral process, spending on ads is premature. It's common for a local service business to pick up noticeably more calls just from fixing its GBP photos, hours, and response time — for nothing.

If your website barely converts the traffic you already have, fix the website first. If you're not asking customers for reviews, spend A$0 and build a review habit. If most of your new business comes from referrals, you may not need Google Ads yet — you need a customer-reward program instead.

We typically recommend A$0 of ad spend until:

• Your website loads quickly and feels fast on a phone
• You have a healthy bank of recent GBP reviews
• Your booking or contact form is functional and clear
• You've tracked at least one month of conversion data so you know your baseline

Once those are locked, Google Ads start to make sense. Before that, you're pouring water into a bucket with a hole in the bottom.

The bootstrap case: A$300–600 per month

You've got the fundamentals in place but limited cash. A$300–600 a month is enough to test whether Google Ads work for your specific business, in your specific market.

What is the smallest you can realistically spend on Google Ads? Technically Google has no minimum — you can set a daily budget of a few dollars. But the smallest spend that actually works is around A$300 a month (roughly A$10 a day). Below that, your budget is spread so thin across keywords that Google's system never gathers enough data to optimise, so the clicks you do buy tend to underperform. If A$300 a month is a stretch right now, you're usually better off putting that money into your Google Business Profile and website first, then starting ads once you can fund a proper test. For a wider view of what each marketing channel costs in Australia, see our marketing costs in Australia breakdown.

Over three months at that level you'll generate real, measured data on what a customer actually costs you to acquire — your numbers, from your account, not an industry average. That data is worth more than any consultant's opinion. Run it, measure it, decide. Don't judge it after two weeks; judge it after you have a quarter of real figures.

Take a kitchen-design business as a hypothetical. Starting at A$450 a month for three months is enough to see whether the channel pays — a handful of new enquiries, measured against a lifetime value that runs into the thousands. Once the maths is proven in your own account, scaling up is an easy, confident decision. Your cost per lead may drift up a little as you push volume, but if the channel is profitable at small scale, you scale knowing the economics — not guessing.

When you're already profitable: A$1800–3600 per month

If you're comfortably covering payroll, rent, and a real profit margin, Google Ads becomes a scaling lever rather than a survival tool. The question shifts from "can we afford this?" to "is each new customer worth more than we're paying to win them?"

This is also where patience earns its keep. The pattern we see repeatedly:

1. Months 1–2: cost per acquisition is at its highest while the campaign gathers data. This is exactly when owners are tempted to switch it off — and exactly when they shouldn't.
2. Months 3–4: the system has enough conversions to learn from, and your cost per lead usually starts to settle. You're closer to profitable.
3. Month 5+: you're profitable and the question becomes "can we handle more volume?" rather than "is this working?"

Sitting tight through those early weeks is what separates businesses that build a durable channel from those that abandon it after six weeks of impatience.

What a paid result can actually look like

We won't quote you market "average" click costs as if they're facts — they vary wildly by industry, location and month, and most numbers floating around online are guesses. What we can do is show you one paid result of our own, honestly.

This post is about Google Ads, but the one paid campaign result we can prove was on Meta, not Google: a single lead-generation campaign for our client Dam Good Patios delivered 63 leads at A$8.33 each on A$525 of spend. We're telling you it was Meta on purpose — it would be easy to imply it was Google Ads, but that wouldn't be true, and a budget you set on a fudged number is a budget set on sand. The honest takeaway isn't "expect A$8.33 leads on Google." It's that a tightly-built paid campaign, measured against real cost per lead, can be genuinely cheap relative to the value of the work it brings in. Your figures will be your own — which is exactly why you start small, measure, then scale.

If you're trying to decide right now

Pull your last 12 months of revenue and work out your gross margin in dollars. Multiply that monthly figure by 5% and 15%. That's your range. If it lands around A$500–1200, start at the lower end. If it lands around A$1800–4200, start near A$1800 and commit to three months before you judge it.

If you're currently spending nothing and have solid fundamentals — a fast, working website, a healthy bank of reviews, and a clear conversion path — test at A$300–600 for three months. Ignore your competitor's strategy, and ignore every "average" figure (including ours) the moment your own unit economics contradict it. Your business is unique, and your account data is the only number that's actually true for you.

If you'd like a second opinion on whether your current spend is calibrated to your margin and acquisition costs, send through your numbers. We charge a flat management fee from A$700/mo plus your ad spend, with no lock-in — see our pricing — and we'll tell you honestly whether you're in the right ballpark or spinning your wheels.