How much should a small business spend on Google Ads?
There is no single right number. Work backward from the leads you want and what a customer is worth. Benchmarks, a simple formula and what wastes budget.
There is no single right number, so work backward from your own goals. Multiply the leads you want each month by your expected cost per lead, then check that the result makes sense against what a customer is worth to you.
As an illustration, 20 leads at a benchmark cost of $66.69 each comes to about $1,334 a month in ad spend. That is simple arithmetic to show the method, not a forecast, and your market could cost far more or far less.
There are two separate costs
Budget for each one on its own.
- Ad spend goes to Google, and you pay it when people click.
- Management pays for whoever runs the campaigns. If that is you, the cost is your time. If it is an agency or freelancer, it is a separate fee on top of the ad spend.
When you compare quotes, confirm whether each figure is the ad spend, the fee or both together.
How Google’s budget actually works
Your daily budget is an average, not a hard daily cap. According to Google’s help page, most campaigns can spend up to two times the average daily budget on a busy day, and the monthly limit is about 30.4 times that budget. So a $10 daily budget works out to about $304 a month.
This surprises people who see a $20 day on a $10 budget. Google evens it out across the month, so judge the spend monthly.
What the benchmarks say
WordStream’s 2026 benchmarks, reported by PPC Land, cover 13,474 US search campaigns across 23 industries from April 2025 to March 2026:
| Measure | Median |
|---|---|
| Cost per click | $5.42 |
| Cost per lead | $66.69 |
| Click-through rate | 6.64% |
| Conversion rate | 8.18% |
Costs vary widely by industry:
| Industry | Cost per click | Cost per lead |
|---|---|---|
| Attorneys | $9.87 | $131.63 |
| Home improvement | $8.33 | Not reported here |
| Dentists | $8.00 | Not reported here |
| Restaurants | $2.05 | $30.57 |
These figures are US medians across many advertisers. They are useful for a first estimate, but they are not your numbers. Your city, competitors, offer and landing page all move them. Treat them as a starting assumption, then replace them with your own data after a month or two.
A simple way to set your budget
You need three figures.
- Leads wanted per month. Base this on what your team can actually handle.
- Expected cost per lead. Use a benchmark at first, then your real figure.
- What a customer is worth. Use the profit from a typical customer, and include repeat business if it is reliable.
Then calculate:
- Monthly ad budget = leads wanted × cost per lead
- Cost per customer = cost per lead ÷ the share of leads that become customers
If one in five leads becomes a customer at $66.69 per lead, each customer costs about $333 in ad spend. If a customer brings in less profit than that, the campaign needs a better offer, a better landing page or a different channel. More budget will not fix it.
Budgets too small to learn from
A very small budget can give you too few clicks to tell what is working. Use your cost-per-click estimate to check this: at $5.42 a click, $300 a month buys about 55 clicks. If you are in a costly industry, it buys far fewer.
If your budget is tight, narrow the campaign instead of spreading it thin. Choose one service, one location and the search terms closest to buying.
If you are in Australia
The method is the same, but the benchmarks above are from the US. One Australian agency, Websites That Sell, reports from its own client data that small local businesses often spend $500 to $1,500 a month, with example clicks of $4.58 for residential construction and $8.21 for professional services. That is a single agency’s data, so use it as a rough guide. Check how GST applies to your Google invoices with your accountant.
What wastes budget
The most common leaks are not in the ads themselves.
- No conversion tracking. Without it, you cannot tell which searches bring in inquiries.
- A weak landing page. Sending paid clicks to a slow or vague page wastes them. Our website audit guide shows how to check yours.
- Slow replies. A lead that waits may already have called someone else. If you miss calls during the day, read how an AI receptionist compares with the alternatives.
- Search terms you never reviewed. Check what people actually typed, and exclude what does not fit.
Questions to ask anyone running your ads
- Is the fee separate from the ad spend?
- Will I own the Google Ads account and its data?
- What exactly counts as a conversion?
- Will I see the search terms and cost per lead each month?
- How will you tell me if ads are the wrong channel for my business?
If you would like help setting this up, our marketing team runs search campaigns measured by the inquiries they bring in. Search ads work alongside organic search, so also see what to expect from an SEO agency.
Questions people ask
How much should a small business spend on Google Ads per month?
Work backward: multiply the leads you want by your expected cost per lead, then check that a customer is worth it. As an illustration, 20 leads at a benchmark $66.69 each is about $1,334 a month in the US, but your market may be very different.
How does Google's daily budget work?
Your daily budget is an average. Google can spend up to two times it on a busy day, but for most campaigns it limits a month's spend to about 30.4 times your daily budget.
Does a Google Ads budget include management fees?
No. Ad spend goes to Google, and any agency or freelancer fee is separate, so budget for both.
What should I fix before spending more on ads?
Conversion tracking, the page the ad lands on, and how quickly you reply to new leads. Extra budget makes each of these problems more expensive.