If your clinic sends reminders or follow-ups on WhatsApp, there is a rule you may not have heard of: the messaging limit. It is a cap Meta puts on how many different numbers you can start a new conversation with in a day.
It does not affect a patient who writes to you first. It matters for messages you start outside the 24-hour window. Here is how the limit is counted, how it grows, what can stop a template from sending, and what it means for a normal clinic day.
What exactly does the limit count?
According to Meta's documentation, the messaging limit is the maximum number of unique WhatsApp users you can deliver messages to outside a customer service window, in a moving 24-hour period. It counts different phone numbers, not messages. Three messages to one patient still count as one.
The window means the patient wrote to you in the last 24 hours. Inside it, you reply freely with no cap. Outside it, you send a Meta-approved template message, and that is what counts toward the limit.
Where does the limit start, and where does it go?
Published sources say a new business portfolio starts at 250 unique numbers per day. It moves up to 2,000 when you complete Meta business verification, or when you deliver 2,000 template messages to unique numbers within 30 days with good quality.
After that it rises on its own: 10,000, then 100,000, then unlimited. You need good message quality and you must use at least half of your current limit within 7 days. Meta does not raise the limit for capacity you are not using.
The limit belongs to the whole account, not one number
Since October 2025 the limit sits at the business portfolio level instead of each phone number. All numbers in one portfolio share one allowance. If your clinic has a number per branch under one account, a busy branch can use up the allowance for the others.
What happens when quality drops?
Each number and each template has a quality rating based on how recipients react, including blocks and reports. According to sources tracking Meta's changes, since 7 October 2025 a falling rating no longer lowers your limit, but it does stop the limit from growing.
The bigger risk for a clinic is the template itself. If a template's quality falls, Meta can pause it for a while, and repeated drops can disable it. A paused template cannot be sent. So if your appointment reminder depends on one template and it gets paused, reminders stop until it is fixed.
What this means on a normal clinic day
Take the numbers above. A clinic sending a 24-hour reminder to 60 patients a day is far from 250. For a solo or small clinic, the limit is usually not a daily problem.
It shows up in two cases: a big center messaging hundreds of patients a day, or a clinic sending a bulk message to an old patient list. In the second case, spread the sending over several days instead of hitting the cap and blocking other messages outside the window.
How to protect your clinic number's quality
- Message only patients who contacted you or booked with you, never bought contact lists.
- Keep messages useful: an appointment, a confirmation, a prescription ready. Random promotional messages are what get blocked.
- Give patients an easy way to stop messages instead of blocking the whole number.
- Check the quality rating in WhatsApp Manager now and then, especially after any bulk send.
- With several branches, remember they share the limit.
Where Kashfy fits
Kashfy runs on your own WhatsApp Business number on Meta's official Cloud API, so the limit and the quality rating belong to your own account, not one shared with other clinics. Appointment reminders carry no Kashfy fee, but a reminder sent more than 24 hours after the patient's last message is a template message, and Meta charges you for it. It also counts toward the limit above.
For the full plan details, see the pricing page.
