A useful Google Ads budget depends on how many suitable people are searching, what it may cost to reach them and what a new customer is worth to your business. One daily amount cannot answer that for every trade, retailer or professional service.
Start with a forecast for your actual services and locations, then check what the website needs to turn a visit into an enquiry. The media budget and the cost of managing the advertising are separate parts of the decision.
Four numbers to work through
You need a media budget, an expected cost per click, an enquiry rate and an estimate of how many enquiries become customers. Forecasts help you make assumptions. Actual campaign and business records help you replace those assumptions over time.
Do not use a general New Zealand click-price average as your forecast. Research the searches that matter in the places you can serve. A narrow, expensive service market can behave very differently from another category.
A worked example, not a promise
The figures below are illustrative. They are not an M8 forecast or a claim about normal New Zealand results.
| Assumption | Example |
|---|---|
| Media available for the test | NZ$750 |
| Average cost per click | NZ$10 |
| Visits that budget would buy | 75 |
| Assumed enquiry rate | 4% |
| Enquiries implied by that assumption | 3 |
| Media cost per enquiry | NZ$250 |
If only one of those three enquiries became a customer, the media acquisition cost would be NZ$750 for that customer. Management and any other campaign costs would increase the total.
That may work for a valuable, profitable customer relationship. It may be unsuitable for a low-margin one-off sale. Use contribution or gross profit rather than revenue alone when considering what the business can afford to acquire a customer.
Try your own assumptions.
Change the numbers to explore a scenario. This is arithmetic, not a performance forecast. Media costs only.
75Estimated visits
3.0Enquiries implied
NZ$250Media cost per enquiry
Enquiry counts are expected values from your assumptions, not guaranteed whole-number results. Management fees and other costs are excluded.
Check demand before turning the budget up
Google Keyword Planner can help you research search volumes and forecast a set of keywords. Set the locations and network to match the campaign you are considering. Review seasonality as well as the annual average.
Historical search volume is different from clicks you will receive. Top-of-page bid ranges are different from an actual average cost per click. Planner’s competition column concerns advertisers; it is not an organic SEO difficulty score.
If there are few relevant searches, more budget may not create more suitable demand. You may need a wider service area you can genuinely cover, another relevant service or a different channel. Expanding to unrelated searches simply to spend the budget is a poor trade.
Understand the daily budget
For most Google Ads campaigns, the daily amount is an average. Google’s published rules allow spending up to twice that average on a day, with a monthly limit generally based on 30.4 times the unchanged average daily budget.
For example, NZ$25 a day corresponds to NZ$760 across a full month under that rule. It is different from a hard NZ$25 daily ceiling. Check the budget report and the rules for the campaign type you use, particularly after budget changes.
Give the test something useful to measure
Choose a service, an area, a relevant page and a clear conversion. Confirm the form works and records successful enquiries accurately before launch. A contact-page visit is not the same as an enquiry.
Keep notes on lead quality and sales as well as the advertising numbers. If five messages arrive but none match the service you offer, the answer is not automatically a bigger budget. Review search terms, the offer and the page together.
When another first step makes more sense
If the click forecast leaves little room to learn and the economics do not work, consider Google Search versus Meta or SEO versus Google Ads. If the site makes it difficult to enquire, address that before paying for more visits.
Start with a test the business can fund and a reason for that test. Decide what you need to learn, review the actual customer outcome and adjust from there. A budget has a job to do. Choose the job first.
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