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

Most Australian small-business owners spend either A$0 or A$5000 a month on Google Ads. Almost nobody lands in the sensible middle. The reason isn't lack of willingness — it's that nobody tells them what the sensible middle actually is, and the platforms deliberately hide it.

We've run Google Ads for 200+ local services and product businesses across Australia since 2019. The pilot client — a Brisbane plumber — spent A$847 per month and pulled 14 leads per week at A$60.50 each. Not complicated. Not flashy. Profitable. But the number itself meant nothing until we compared it to their revenue, market, and customer lifetime value. That's where the real decision lives.

The A$847 rule 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.

A salon in Paddington doing blowouts at A$65 with a 60% margin makes A$39 per service. They need repeat traffic. A plumbing emergency call nets A$340 in margin per job, and a happy customer returns three times yearly. The salon's break-even Google Ads spend is far lower. The plumber's is far higher. Context determines the floor and ceiling, not the industry or location.

We almost never recommend under A$300 per month or over A$4000 for a local services business. Below A$300, you're splitting budget across keywords so thin that machine learning can't optimise. Above A$4000, you're fighting market saturation in most Australian metro areas unless you're covering a five-postcode region or selling high-ticket services.

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?"

Let's say you run a pool-cleaning business in Ipswich. You charge A$95 per clean, margin is 70% (A$66.50 per job). You have 40 existing customers who clean every two weeks. That's 40 recurring jobs monthly, or A$2660 margin. But half those customers will churn naturally each year. You need three new customers monthly to break even on churn.

Google Ads for a pool cleaner in regional Queensland typically runs A$12–18 per click, with 3–5% converting to leads and 20–30% of leads converting to jobs. That's roughly A$240–360 cost per new customer acquired. Three customers = A$720–1080 monthly spend. You'd budget around A$900.

Compare that to a Brisbane accountant selling tax-return prep at A$1200 with an 85% margin (A$1020 gross profit per return). They need one client per month to break even on their own salary. Google Ads runs A$8–14 per click in their space. If 2% convert to leads and 40% of leads convert, that's A$2000–3500 per client. They're better off with A$2200–2600 monthly spend to hit two clients reliably, then treat the rest as profit.

Same city. Wildly different budgets. Because the unit economics are different.

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. A tradies business with A$40k monthly revenue and 55% margin (A$22k gross) can justify A$1100–3300 monthly on Google Ads. A retail shop with A$80k revenue and 35% margin (A$28k gross) can justify A$1400–4200. Those ranges assume the Google Ads are the only paid acquisition channel. If you're also running Meta Ads, you're splitting that budget.

The lower end (5%) is for businesses with strong word-of-mouth, existing customer bases, or high customer lifetime value. The upper end (15%) is for competitive markets, low-margin volume plays, or businesses trying to scale fast.

One pilot client — a property-management company in Brisbane — was spending A$1200 monthly and getting 1.2 leads per week. Their margin was A$8400 monthly. We increased spend to A$2400. Lead volume went to 2.8 per week. Cost per lead dropped from A$230 to A$206 because the algorithm had more budget to work with. They stayed within the 5–15% range and doubled their growth runway.

When A$0 is actually the right call

Stop. If you haven't optimised your own website, Google Business Profile, or customer-referral process, spending money on ads is premature. We've seen local services businesses pick up 40% more calls just from fixing their GBP photos and response time.

If your conversion rate is below 2%, fix the website first. If you're not asking customers for reviews, spend A$0 and implement a review system. If 90% of your new business comes from referrals, you might not need Google Ads yet — you need a customer-reward program instead.

We typically recommend A$0 spend until:

• Your website loads in under 2 seconds
• You have at least 30 reviews on your GBP
• Your booking/contact form is functional and clear
• You've tracked at least one month of conversion data

Once those are locked, Google Ads start making 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 monthly is enough to test whether Google Ads work for your specific business.

Over three months, you'll get roughly 40–100 clicks (depending on your industry), 1–4 leads (depending on your conversion rate), and real data on whether a customer costs A$150 or A$500 to acquire. That data is worth more than any consultant's opinion. Run it, measure it, decide.

We started one Brisbane-based kitchen-design business at A$450 monthly. After three months, they had six new clients (A$75 per lead, A$8500 lifetime value each). They jumped to A$1800. After two more months, the cost per lead had risen to A$140 but volume had tripled. They're now at A$2400 monthly and it's still profitable. Without the bootstrap phase, they'd never have trusted the channel.

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

If you're hitting payroll, rent, and profit margins comfortably, Google Ads becomes a scaling lever, not a survival tool.

At this spend level, the channel should deliver 1.5–4 leads daily (depending on your market and conversion rate). Your focus shifts from "can we afford this?" to "is each new customer worth more than we're paying for them?" Most Australian SMBs at this stage find the answer is yes.

The pattern we see repeatedly:

1. Month 1–2: Cost per acquisition is high (A$150–400 depending on industry). You're tempted to turn it off.
2. Month 3–4: Machine learning kicks in. Cost per lead drops 20–35%. You're closer to profitable.
3. Month 5+: You're profitable and scaling. The question becomes "can we handle more volume?" not "is this working?"

Patience in months 1–2 is what separates businesses that build sustainable channels from those that abandon them after six weeks.

If you're in a competitive metro: A$2400+

Brisbane, Sydney, Melbourne, Perth — the cost per click in professional services, home services, and e-commerce has climbed significantly in the last 18 months. A$15–25 per click is now standard. A$25–40 for legal, accounting, or commercial real estate.

At that cost, you need a budget that survives the early learning phase. A$2400 monthly (A$80 daily) gives Google's algorithm enough spend to find your actual customers instead of guessing. Anything less and you'll churn through your learning phase without hitting statistical significance.

Our experience: regional Queensland and South Australia see lower costs (A$6–12 per click). Inner-ring metro suburbs see higher costs (A$18–30 per click). If you're in Paddington or inner Brisbane, budget higher than our A$5–15% range suggests. If you're in Toowoomba or regional Victoria, you can operate closer to the floor.

If you're trying to decide right now

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

If you're currently spending nothing and have solid fundamentals (working website, 30+ reviews, functional conversion path), test at A$300–600 for three months. Ignore your competitor's strategy and ignore our earlier numbers if your unit economics contradict them. Your business is unique.

If you'd like a second opinion on whether your current spend is calibrated to your margin and customer acquisition costs, send through your numbers. We'll tell you if you're in the right ballpark or spinning your wheels.