There is no universal Meta Ads budget that guarantees a particular number of leads. The right amount depends on your unit economics: the gross profit from a sale, the share of qualified enquiries that become customers and the acquisition cost the business can afford.
That means a useful budget starts with the sale and works backwards to the ad. Average CPC or CPM figures may provide context, but they cannot tell you whether a campaign will be commercially viable for your service.
Why Meta advertising costs vary
Facebook and Instagram deliver ads through an auction. Meta explains that the winner is not simply the advertiser with the highest bid. The selected objective, audience, budget, duration and estimated ad quality all contribute to the total value used in the auction. Its official ad auction guide explains the mechanism.
Costs therefore change with location, season, competition, offer and audience response. A home improvement company, wedding studio and aesthetic clinic should not expect identical costs simply because they use the same campaign objective.
Meta also states on its official advertising cost and budget page that there is no one-size-fits-all answer. Your budget is the amount you are willing to spend; the auction and campaign performance determine what that money buys.
Calculate the most you can pay for an enquiry
A simple formula gives you an economic ceiling:
Maximum cost per qualified enquiry = acceptable customer acquisition cost × qualified-enquiry-to-sale rate.
Consider a completely hypothetical example. A business is willing to spend up to A$750 to acquire a customer. It closes one sale from every ten genuinely qualified enquiries, giving it a 10% close rate. Its theoretical ceiling is therefore A$75 per qualified enquiry.
This calculation does not promise that Meta will deliver enquiries for A$75. It only shows the point beyond which the economics stop working under the current assumptions. If the team improves its close rate, it can afford more for each suitable opportunity. If gross profit falls, the ceiling must also fall.
You need three numbers to use the formula:
- average gross profit from a sale, not just revenue;
- the maximum share of that profit available for customer acquisition;
- the real conversion rate from a qualified enquiry to a customer.
If the business has no history yet, begin with a conservative assumption and replace it with its own data as quickly as possible.
Daily budget or lifetime budget?
Meta supports an average daily budget and a lifetime budget for the full campaign period. Daily budgets suit ongoing activity and make adjustments straightforward. Lifetime budgets suit campaigns with fixed start and end dates.
The platform recommends providing enough budget over at least seven days so its delivery system can learn. It also explains that a daily budget is an average: spend may be higher on an individual day while remaining capped across the week. The current details are set out on Meta's official pricing page.
The practical lesson is not to hunt for a magic daily amount. Fund a long enough period to observe actual enquiries, and do not judge the test from two volatile days.
What can a modest daily budget tell you?
A modest daily budget can be a valid starting point for one service area and one clear offer, but it is neither a benchmark nor a volume promise. Its purpose is to buy enough signal to answer a defined question.
The smaller the budget, the more concentrated the campaign structure should be. Splitting limited spend across many ad sets, audiences and creatives leaves each one with little opportunity to deliver. Meta similarly recommends consolidating comparable ad sets to reduce audience fragmentation in its guidance on simplifying ad set structure.
A focused test might ask: do this offer and these creative angles produce enquiries that the team can contact and qualify? The same budget cannot reliably validate five offers, four locations and twelve audiences at once.
Track the metrics in commercial order
CPC and CPM describe the media purchase. They do not describe the business result. A useful scorecard follows the whole path:
Spend → enquiries → contactable people → qualified opportunities → appointments → quotes → sales → gross profit.
This makes it possible to calculate:
- cost per submitted enquiry;
- cost per contactable person;
- cost per qualified opportunity;
- cost per appointment;
- customer acquisition cost.
A campaign producing A$30 leads may be poor if nobody answers. Another producing A$90 leads may be profitable if the projects are suitable and each sale has strong margins. The cost shown in Ads Manager only becomes meaningful when connected to the pipeline.
Our guide to generating qualified local-service enquiries with Meta Ads explains how to organise that system. If the channel itself is still in question, compare Meta Ads and Google Ads for local businesses.
When to increase, hold or stop the budget
Increase spend gradually when enquiry quality remains consistent, the team follows up reliably and customer acquisition cost leaves the expected margin. Hold the budget when there is not yet enough data or the sales cycle has not had time to produce outcomes. Reduce or stop it when the campaign remains above the economic ceiling after checking the offer, creative, form and sales process.
The useful question is not “how much should we spend on Facebook?” It is “how much can we invest to learn, then acquire a customer profitably?” Solvya builds the test around that commercial equation and tracks enquiries through appointments, quotes and sales. See our approach.