Ask ten agencies how much should I spend on Google Ads and you will get ten different numbers, most of them suspiciously close to what that agency charges. It is the single most common question we hear from business owners who have never run a campaign, and it deserves a better answer than “it depends”.
So here is one. This guide gives you the actual maths, real Australian cost per click data, the two spending floors that decide whether your campaign has a chance, and the point where you are better off not advertising at all. No pitch until the end, and you can skip that bit.
Why you never get a straight answer
There is no official minimum spend on Google Ads. Google will happily take $500 a day from you. That freedom is exactly why the question is so hard to answer, because the platform will let you set a budget that has no realistic chance of working and it will not warn you.
The other reason is less charitable. Most articles on this topic are written by agencies, and an agency’s incentive is to anchor you high enough to justify a retainer. That is why so much of the advice online jumps straight to management fees before it has helped you work out whether the ads make sense for your business at all.
Your number is not a market average. It is a calculation based on three things you already know or can find out in twenty minutes.
The short version, if you want it now
Most Australian small businesses starting out land between $1,000 and $3,000 per month in ad spend. Under $1,000 you usually cannot buy enough clicks to learn anything. Above $3,000 you should have data proving it is working before you commit.
That range is a sanity check, not your answer. Here is how you get your actual number.
Work your budget backwards, not forwards
Almost every business owner sets a google ads budget by deciding what they can stomach losing. That is a fear-based number, and it has no relationship to what the campaign needs to succeed.
Instead, start from the customers you want and work back to the spend. You need four figures.
1. What a customer is actually worth to you
Not the value of one job; the customer lifetime value. A plumber who fixes a $280 leak and then gets called for every job in that house for eight years is not a $280 customer. A dentist who does a $190 check-up on a family of four is not a $190 customer either.
Take your average sale, multiply by how many times a typical customer buys from you, and be conservative. Most owners underestimate this number badly, then wonder why their budget feels tight.
2. What clicks cost in your industry
Open Google Keyword Planner inside a free Google Ads account, enter the five or six terms a customer would type when they are ready to buy, and set the location to your actual service area. Ignore the informational keywords; you want the ones with buying intent.
The tool gives you a top-of-page bid range. Your real cost per click will usually sit somewhere between the low and high estimate, closer to the high end in a capital city.
3. What percentage of clicks become enquiries
If you have no data, assume 3% to 5%. A well built, fast, single-purpose landing page can reach 8% to 10%; a generic homepage with a contact form buried in the footer will sit closer to 1%.
This number matters as much as your click cost, and it is the one you control. Doubling your conversion rate halves the budget you need to hit the same number of leads, which is why our landing page development work usually comes before any spend increase.
4. How many customers you need per month
Be specific. “More leads” is not a target. Three new roof replacements, or twelve new patients, or six new bookkeeping clients; that is a target.
The formula
Monthly budget = (leads needed x cost per click) ÷ conversion rate.
Say you are an electrician who wants 12 enquiries a month. Your keywords cost around $6 a click, and your landing page converts at 5%. That is (12 x $6) ÷ 0.05 = $1,440 per month.
Change one variable and watch what happens. Lift the conversion rate to 8% and the same 12 leads cost you $900. Let the clicks run at $9 because you are bidding on broad, vague terms and it climbs to $2,160. Same business, same goal, more than double the spend.
What clicks actually cost in Australia
These are working ranges for high-intent search terms in 2026. Treat them as a starting estimate, then verify with Keyword Planner for your suburb, because a click in Sydney CBD can cost double the same click in a regional centre.
| Industry | Typical CPC (AUD) |
|---|---|
| Hospitality and tourism | $1.00 to $2.60 |
| Ecommerce and retail | $1.40 to $3.80 |
| Education and training | $1.20 to $5.50 |
| Real estate | $1.50 to $6.80 |
| Trades and home services | $2.20 to $8.50 |
| Medical and allied health | $1.80 to $7.20 |
| Accounting and bookkeeping | $4.00 to $8.00 |
| Dental | $3.50 to $12.00 |
| Finance and insurance | $3.00 to $18.00 |
| Legal services | $3.50 to $25.00 |
The cross-industry average sits around $2 to $4 for search campaigns, but averages hide the thing that matters. Emergency and “near me” searches cost more than research searches, because the person typing them is ready to hand over money. You want the expensive clicks. The cheap ones are cheap for a reason.
For a worked example in one vertical, our guide on how to advertise a plumbing business runs through the same maths with trades numbers.
The two floors your budget has to clear
Formula aside, there are two hard thresholds. Miss them and your campaign is not underperforming; it simply cannot function.
Floor one: ten clicks a day
Google’s system learns from volume. Below roughly 10 clicks a day, or about 300 clicks a month, it never gathers enough signal to work out which searches, times and devices convert for you.
Multiply your estimated cost per click by 10 to get your minimum daily budget. At $5 a click, that is $50 a day, or roughly $1,520 a month. At $2.50 a click, it is $25 a day, or $760 a month.
Floor two: thirty conversions a month
If you use automated bidding such as Maximise Conversions or Target CPA, the smart bidding learning phase typically needs around 30 conversions a month before it stabilises. Below that, the system makes erratic bidding decisions because it is guessing.
So take your estimated cost per lead and multiply by 30. If leads cost you $60, you need to comfortably cover $1,800 a month for automated bidding to earn its keep. Cannot reach that yet? Run manual CPC or Maximise Clicks with tight keywords instead, and switch to automation once the volume is there. This is one of the most common and most expensive mistakes beginners make, because Google’s setup wizard nudges you toward automation by default.
Ad spend is not your total cost
Three costs sit alongside the money that goes to Google, and leaving them out of your planning is how budgets blow up in month two.
Management fees. If someone else runs the account, expect $800 to $2,500 a month in Australia, separate from ad spend. Some charge a percentage of spend instead, usually 10% to 20%, which quietly rewards them for spending more of your money.
GST. Australian advertisers are charged GST on ad spend, so a $2,000 budget is $2,200 out of the bank account. Registered businesses claim it back through the BAS, but the cash still leaves first.
The landing page. This is the cost nobody quotes and everybody pays. Your landing page experience is one of the three components of Quality Score, and Quality Score directly changes what you pay per click. A score of 8 can cut your cost per click by roughly a third against baseline, while a score of 3 can inflate it by two thirds. Same keyword, same auction, wildly different bill.
How Google actually spends your daily budget
This trips up nearly every first-timer. Your daily budget is an average, not a ceiling.
Google can spend up to twice your daily budget on a single day when it sees an opportunity, then pull back on quieter days to even out. Your protection is the monthly spending limit: daily budget multiplied by 30.4. Set $50 a day and your maximum monthly exposure is $1,520, according to Google’s own documentation on average daily budgets.
The catch is that this cap applies per campaign. Three campaigns at $30 a day each is not $30 a day; it is $90, or roughly $2,736 a month. Check the account-level billing settings and set a hard cap there if you want to sleep at night.
What $500, $1,500 and $3,000 a month really buys
Using a $6 average cost per click and a 5% conversion rate, which is a fair mid-market assumption for an Australian service business:
| Monthly ad spend | Clicks | Enquiries | Realistic verdict |
|---|---|---|---|
| $500 | ~83 | ~4 | Too thin to learn from. Viable only with cheap clicks and one tight keyword set |
| $1,000 | ~167 | ~8 | Workable for one service in one suburb. Expect a slow start |
| $1,500 | ~250 | ~12 | The realistic entry point for most service businesses |
| $3,000 | ~500 | ~25 | Enough for multiple campaigns and proper testing |
| $5,000 | ~833 | ~42 | Multi-service or multi-location, with remarketing |
Now flip it. At $1,500 a month producing 12 enquiries, your cost per lead is $125. If you close one in three and an average job is worth $2,400, that is roughly $9,600 in revenue from $1,500 in spend. The budget question answers itself once you frame it that way.
If those numbers do not work for your business, the honest answer is that Google Ads may not be your first move. Businesses with an average sale under about $150 and no repeat purchase usually struggle to make paid search profitable, and a registered not-for-profit should be exhausting its free credit before spending a cent; our guide on making a Google Ad Grant account work covers that path.
Signs your budget is too low
Google tells you, if you know where to look.
The budget limited status on a campaign means your ads stopped showing because the daily budget ran out. People were searching, and you were not there. That is not an efficiency problem; it is a missed-demand problem.
The second signal is search impression share. Add the column to your campaign view. If you sit below 60% on your core keywords, there is reachable demand you are not capturing.
Before you throw money at either, check that your conversion tracking is accurate and your negative keyword list is doing its job. Extra budget amplifies whatever the account is already doing, good or bad.
Budget mistakes that make the numbers look worse than they are
Judging month one. The first four to six weeks are data collection. Your cost per acquisition will be higher than steady state, and that is normal. Most campaigns need 60 to 90 days before the numbers mean anything.
No negative keywords. Without them, an ad for “emergency electrician Gosford” shows for “electrician apprenticeship” and “electrician salary”. A decent negative list prevents 20% to 40% of wasted spend, and it takes an hour to build.
Targeting too wide. Setting location targeting to “presence or interest” instead of “presence” shows your ads to anyone who has ever searched your city. If you serve the Central Coast, do not pay for clicks from Wollongong.
Spreading a small budget thin. Five campaigns on $1,000 a month gives every campaign $200 and none of them enough data. Pick your highest-margin service, win there, then expand.
Doubling the budget overnight. A sudden jump resets the learning and performance dips for a week or two. Increase by 20% to 30% every fortnight instead.
Sending paid traffic to your homepage. A generic homepage forces the visitor to go hunting. It drags your Quality Score down and your cost per click up.
Copy tip: mirror the exact search term in your headline. An ad that reads “Emergency Electrician Gosford” for someone searching that phrase lifts click-through rate and ad relevance, both of which feed Quality Score. Better Quality Score means cheaper clicks, which means your existing budget buys more. Use responsive search ads with several headline variants so Google can match the right one to each query, and pin your location or service headline if you need it in every impression.
Frequently asked questions
Is $500 a month enough for Google Ads?
It can work in a low-competition niche with $2 to $4 clicks, where $500 buys 125 to 250 clicks and perhaps 6 to 12 enquiries. In trades, dental or legal, where clicks run $8 to $25, that same $500 buys 20 to 60 clicks and will not generate enough data to optimise. Check your industry cost per click before committing.
What is the minimum spend Google requires?
There is no official minimum. Google will run a campaign on $5 a day. The practical minimum is whatever buys you roughly 10 clicks a day, which for most Australian service businesses means $800 to $1,500 a month.
Is $10 a day enough for Google Ads?
$10 a day is $304 a month. At a $5 cost per click, that is 2 clicks a day. It is enough for one narrow, high-intent keyword in one suburb, and it is not enough for the system to learn anything. Treat it as a toe in the water, not a campaign.
How long before Google Ads starts working?
Expect two to three weeks before performance stabilises and 60 to 90 days before you have data worth making decisions on. Businesses that pull the plug after four weeks almost always quit during the learning phase.
Should I spend on Google Ads or SEO first?
Google Ads buys you traffic today and tells you which keywords convert. SEO compounds but takes months. If you need enquiries this quarter, start with ads, then reinvest what you learn about converting keywords into your organic strategy.
Do I pay GST on Google Ads in Australia?
Yes. GST is applied to ad spend for Australian advertisers, so budget for the extra 10% in cash flow terms even if you claim it back through your BAS.
Want a second opinion before you spend a dollar?
If you have run the numbers and want someone to sanity check them against real campaign data in your industry, that is what our free 30-minute strategy session is for. We will tell you what your clicks are likely to cost in your suburb, what budget your goals actually require, and whether Google Ads management is the right move for you at all. Sometimes the answer is not yet, and we will say so.
When businesses do work with us, they get direct access to the senior strategist building the campaign, not a junior account manager reading from a template. There are no lock-in contracts, because we would rather earn the next month than trap you in a twelve-month agreement. You also get real-time reporting showing every click, every conversion and every dollar, so you can see exactly what your budget is producing without waiting for a monthly PDF.
We also protect exclusive territory, which means we will not run the same campaign for your direct competitor down the road. Based in Gosford, we work with businesses across the Central Coast, Newcastle and Sydney, and we are happy to sit down face to face.
Call 0451 665 363 or book your free strategy session.
Final thoughts
The reason nobody can tell you how much you should spend on Google Ads in one sentence is that the correct number lives inside your business, not inside a benchmark table. Work out what a customer is worth, find what a click costs in your suburb, be honest about your conversion rate, and multiply.
Then clear the two floors. Buy at least 10 clicks a day, and either reach 30 conversions a month or stay off automated bidding until you do. Get those right and $1,500 a month can outperform a poorly structured $5,000. Get them wrong and no budget will save the campaign.