How Much Should a Small Business Budget for Google Ads in Australia?

One of the first questions I get asked is: “How much should I spend on Google Ads?”

The short answer: it depends on your industry, location, and goals. But I can give you realistic ranges and a simple formula to figure out what makes sense for your business.

The Numbers: What Australian Small Businesses Actually Spend

Let’s start with data from current 2026 market research:

Most small Australian businesses start in the $1,500–$3,000/month range, which is enough to get meaningful data without huge risk.

Cost Per Click by Industry (Australia 2026)

Your budget goes further or shorter depending on your industry:

The rough math: If your average CPC is $3 and you have a $1,500/month budget, you’d get approximately 500 clicks per month, or about 16–17 clicks per day.

How to Set Your Budget: A Simple Formula

Start here:

Monthly Budget = (Target Monthly Leads) × (Average Cost Per Lead)

Here’s how to fill this in:

Step 1: How many leads do you need per month?

Think about your sales process. If you convert 30% of leads into customers and you need 3 new customers per month, you need an average of 10 leads per month.

Step 2: What’s your realistic cost per lead?

Your cost per lead = (Monthly Ad Spend) ÷ (Leads Generated)

If you spend $2,000 and get 10 leads, your cost per lead is $200.

Is that worth it? If each customer brings in $1,500 average revenue and you close 30% of leads, yes — your customer acquisition cost is $200 and your lifetime value is higher.

Step 3: Calculate backwards.

If you need 10 leads per month and your cost per lead is $200, your monthly budget should be $2,000.

Factor in Management Fees

Don’t forget: if you’re not managing ads yourself, you need to add management fees.

Total cost = Ad Spend + Management Fee

So if you’re spending $2,000/month on ads and paying a freelancer $1,000/month to manage, your total monthly investment is $3,000.

The Budget vs. ROI Equation

Here’s what matters: not how much you spend, but what you get back.

Let’s say you’re a plumber:

Scenario A: $1,000/month spend

• Average CPC: $4
• Clicks per month: 250
• Conversion rate (clicks to leads): 5%
• Leads per month: ~12–13
• Cost per lead: ~$77
• If you close 20% of leads into jobs and average job = $800, you’d make roughly 2–3 jobs = $1,600–$2,400 in revenue
• ROI: 60–140% (profit after ad spend)

Scenario B: $3,000/month spend

• Average CPC: $4
• Clicks per month: 750
• Conversion rate: 5%
• Leads per month: ~37–38
• Cost per lead: ~$79
• If you close 20% of leads into jobs and average job = $800, you’d make roughly 7–8 jobs = $5,600–$6,400 in revenue
• ROI: 87–113% (profit after ad spend)

The second scenario costs more but brings more predictable, higher-volume leads.

Budget Ranges by Business Goal

Goal: Test whether Google Ads works for my business

• Budget: $500–$1,500/month
• Duration: 1–2 months
• Expected Outcome: 50–250 clicks, 2–10 leads, enough data to decide if it’s worth scaling

Goal: Generate consistent leads and grow

• Budget: $2,000–$5,000/month
• Duration: 3–6 months
• Expected Outcome: 500–1,500 clicks, 25–75 leads, established baseline for optimisation

Goal: Dominate my local market

• Budget: $5,000–$15,000+/month
• Duration: 6–12 months
• Expected Outcome: 1,500–5,000+ clicks, 75–250+ leads, market leadership position

The “Too Low” and “Too High” Traps

Budget too low ($300–$500/month):

• You get 75–150 clicks per month
• Not enough data to see what’s working
• Ads pause frequently, no consistency
• Hard to judge ROI or optimisation potential
• Result: You’ll think Google Ads “doesn’t work” when really you just didn’t spend enough

Budget too high (starting at $10,000+/month):

• If you don’t know what you’re doing, you’ll waste money fast
• High daily budget + poor keyword targeting = wasted money
• Better to start smaller, optimise, then scale what works
• Result: Big spend with poor ROI instead of proving the model first

The sweet spot for first-time small business owners: Start at $1,500–$2,500/month for 1–2 months, then adjust based on results.

How to Adjust Your Budget Over Time

Month 1–2: Establish baseline

• Run your initial budget
• Track leads, costs, and conversions
• See which keywords and ads work best

Month 3–4: Optimize and scale

• Pause worst-performing keywords (save 10–20% of budget)
• Increase budget for best performers (add 10–20%)
• Test new ad variations

Month 5+: Scale or maintain

• If ROI is positive, you can increase budget 10–20%
• If ROI is flat, focus on optimization before scaling spend
• Never double budget unless you’ve proven the strategy works

Questions to Ask Before Setting Your Budget

1. How much revenue do I need from Google Ads to make it worthwhile?
2. What’s my realistic customer conversion rate from lead to sale?
3. What’s the average customer lifetime value?
4. Can I afford to run ads for 2–3 months before seeing strong ROI?
5. Do I have the time or money to manage them (or hire someone)?

If you can’t answer these clearly, start with a smaller test budget ($1,000–$1,500/month) and commit to 2–3 months of data collection before scaling.

Common Budget Mistakes

Mistake 1: “I’ll spend $100/month and see what happens.”
Too low to gather meaningful data. You’ll think ads don’t work when you just didn’t give it enough budget or time.

Mistake 2: “I’ll spend $10,000/month and dominate.”
Starting this high without proven keywords, ad copy, or landing pages is just expensive learning. Expensive learning is still learning, but you’ll probably regret it.

Mistake 3: “I’ll match what my competitor spends.”
You don’t know if their budget is working for them. Focus on your own ROI, not competitors’ spending.

Mistake 4: “I’ll stop after Month 1 if I’m not getting 20 leads.”
Month 1 is about gathering data and finding what works. Scaling usually happens Month 2–3.

The Bottom Line

Start here for your first month: Calculate how many leads you need per month, estimate your cost per lead (ask a freelancer if unsure), and multiply. If you need 10 leads and cost per lead is $200, budget $2,000/month + management fees.

Then commit to running for at least 2–3 months. Don’t expect explosive results Week 1. By Month 3, you should have clear data on what works and what doesn’t — and from there, you can scale with confidence.

Google Ads budgeting is less about the number and more about what you can realistically expect to get back. Start with a realistic number, track results obsessively, and adjust.

Still wondering if Google Ads is right for your business? Check out our Google Ads guide to see if it’s the right fit for you.

Want help figuring out your ideal Google Ads budget? Let’s chat about your numbers — no obligation.