What is Patient acquisition cost (CAC)?
The average amount a practice or clinic spends to bring in one new patient, counting all its advertising and marketing effort.
Patient acquisition cost (CAC) is the average amount a practice or clinic invests in marketing and advertising to win one new patient. You calculate it by dividing everything you spent on acquisition over a period (Meta and Google ads, software, fees, and staff time) by the number of new patients who arrived in that same period. It is a single number that tells you how efficient your strategy is at attracting patients.
Why it matters to your practice
For a doctor or private clinic, CAC is the line between a campaign that turns a profit and one that just creates activity with nothing to show for it. Once you know what it costs to bring in each new patient, you can compare that against what the patient is worth over the course of their treatment and decide, with real data, whether to keep investing in a channel, raise the budget, or rework the ads. It also helps you spot leaks: if CAC climbs because plenty of leads message you on WhatsApp but few book, the problem is probably follow-up or front-desk handling, not the advertising. Without this number, it is easy to mistake "lots of messages" for "good results" and end up overspending.
Example
A dermatologist in Guadalajara spends 8,000 pesos a month on Meta and Instagram ads and another 2,000 pesos between her scheduling software and the receptionist's time answering WhatsApp, for a total of 10,000 pesos. That month, 20 new patients arrive thanks to those campaigns. Her CAC is 500 pesos per patient (10,000 divided by 20). Since an acne patient typically comes back for several follow-up visits over a course of treatment, that 500-peso CAC is comfortably profitable, and it tells her she can raise her budget with confidence.
Related service
Analytics & tracking
Ready to fill your schedule with patients?
Book a free strategy call and we'll show you exactly how your practice could grow over the next 90 days.
BOOK A CALL