4.82 € per lead, 311 € per client: one month of advertising in detail
The raw figures from a real month of advertising: 622.37 € spent, 129 leads, 2 signatures. Why cost per lead reassures, and why it decides nothing.
Almost every gym owner knows their cost per lead. Almost none can state their cost per client. Rather than explain that one more time, here is a real month, raw figures: July 2026, on the ad account of the gym run by AdCoach's founder.
The month, unedited
| Metric | Value |
|---|---|
| Ad spend | 622.37 € |
| Leads generated | 129 |
| Cost per lead | 4.82 € |
| Clients who signed | 2 |
| Cost per client | 311 € |
Between those two bottom figures sits a factor of 65.
4.82 € is a very good number. And it means nothing.
Four euros eighty-two per lead, in a local market, is the kind of result that goes into a report. It is also the one quoted in meetings, the one that reassures, and the one an agency presents at month end.
Yet it measures exactly one thing: what it costs to get someone to leave their number. Not someone who walks in, and not someone who pays.
The number that decides is 311 €. And nobody had it in front of them until ad spend was connected to actual sign-ups.
Two clients out of a hundred and twenty-nine: where is the problem?
A 1.6% conversion rate is, let's be clear, low. The temptation is to conclude that the ads attract the wrong people. That is rarely the right reading, and it is not the right one here: 129 people in a local area gave their contact details to a gym in a single month. The intent was there.
What happens between that form and a membership is a different job, and that is where the money was lost. Three causes explain most gaps of this kind:
- The form is too easy to fill in. On Meta it is pre-filled with the Facebook account's details: two taps and it's sent. A good share of those submissions are not requests, they are three-second curiosities.
- The callback comes too late. Intent decays within hours. Called back the next day, the same person has already moved on - often they don't even remember filling anything in.
- The promise and the front desk don't match. If the ad sells a trial session and the desk offers an annual membership, the conversation starts on a misunderstanding.
We have not yet established which weighs most in this particular case. That is precisely what the number buys you: the ability to ask the right question, in the right place.
Those two signatures are the ones recorded within the month. Some of July's 129 leads will sign in August or September: on a committed membership, several weeks between first contact and signature is the norm, not the exception.
In other words, 311 € is a pessimistic floor, not a verdict. It is also why you should measure over a window of at least thirty days between lead and signature - we cover that in our guide to connecting your gym software to your ads.
The lever is not where you look for it
Faced with 311 €, the reflex is to try to lower the cost of the advertising. That is the hardest and least rewarding lever.
Cost per client = cost per lead ÷ conversion rate
Starting point: 4.82 € per lead, 1.6% conversion, so 311 € per client.
- Halve the cost per lead (2.41 €, which would be a feat in a local market): the client drops to 156 €.
- Raise conversion to 10%, without touching the budget: 129 leads produce 13 clients, so 48 € per client.
The second lever is six times more powerful than the first, and it costs nothing in advertising. It costs a callback within the hour and a clear offer.
A hundred and twenty-nine interested people for 622 € is abundant raw material. The waste is not in its price, it is in what gets done with it.
That month would have taught us nothing without the link between advertising leads and actual sign-ups: Meta stops at 129 forms and 4.82 €.
That is what AdCoach does: reconcile your sign-ups with the ad that brought them, every night, and give you back cost per client, ad by ad. The full calculation method is in our guide to the cost per acquired member.
- A flattering cost per lead and a high cost per client coexist very comfortably. Here, a factor of 65.
- Cost per lead measures a filled-in form, never a client.
- A low conversion rate is almost always a follow-up problem, not a targeting one.
- Measure over thirty days minimum: signatures arrive after the lead's month.
- Conversion rate is a lever six times more powerful than cost per lead, and it is free.
Publishing these figures is not especially flattering. But it is exactly what an owner discovers when they finally connect spend to sign-ups, and it is better discovered on a table than on a bank statement at year end.
Voyez votre vrai coût par adhérent dès aujourd’hui
AdCoach connecte vos pubs Meta en 2 minutes et vous montre, chaque matin, quelle publicité remplit votre salle et laquelle brûle votre budget.
Connecter mes pubs7 jours offerts, sans carte bleue. Vous arrêtez quand vous voulez.