Appointment reminders are the simplest tool for reducing no-shows, and the one most often set up badly. Too early, the reminder is forgotten before the day. Too late, it arrives when the client already knows they won’t be coming.
The short answer: the day before for a regular appointment, plus a heads-up a few days earlier when the appointment was booked well in advance. And in every case, a message that lets the client act, not just one that informs them.
The right time depends on how far ahead they booked
An appointment booked three days earlier hasn’t had time to be forgotten. An appointment booked six weeks earlier has gone through schedule changes, and it has faded from memory.
Hence a useful rule: the earlier the appointment was booked, the more it deserves an interim heads-up. Not to insist, but to let the client free up the slot while it can still be offered to someone else.
The message should let clients cancel
This is what separates a useful reminder from a decorative one. A message that announces a date without offering a way to cancel turns a possible cancellation into a no-show.
The client who won’t come already knows it; what they lack is a simple way to say so. A link to cancel or reschedule changes the outcome, and online booking serves here as much to free up slots as to fill them.
What the message should contain
The date, the time, the location when it can vary, and anything the client should bring, if relevant. Nothing more.
A long reminder doesn’t get read to the end. A reminder that includes a sales offer changes its nature and gets opened less. The two purposes should stay separate.
The send time matters
A message received at six in the morning gets read but not acted on. A message received at eleven at night gets read and forgotten.
Midday or early evening works better, because the recipient can act right away if they need to cancel. It is a detail, and it changes the response rate.
Two reminders at most
The temptation to add a third message shows up after a bad week. It has the opposite effect: clients stop opening the messages, and the day-before reminder loses its effectiveness.
Consistency beats insistence. A single reminder, always at the same time, ends up being expected.
What to avoid
Reminding a client of an appointment that was already canceled. It is the sign that two systems are running side by side, and it is what clients notice fastest.
Mentioning the details of the service in the message. It adds nothing and exposes information that others might read.
Sending the same reminder to everyone, regardless of how far ahead they booked. The needs are not the same.
What this changes in practice
Fewer no-shows, and above all more cancellations announced in time, which means more slots offered again. That second effect is the one you see most in the calendar.
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Frequently asked questions
How far in advance should you send the reminder?
The day before works for a regular appointment. An appointment booked several weeks ahead benefits from a first heads-up a few days before, to leave time to cancel if needed.
Should you send several reminders?
Two at most, and only for appointments booked well in advance. Beyond that, clients stop opening the messages, and it is the one that really matters that suffers.
Is SMS better than email?
Text messages are read almost every time, and quickly, which suits a reminder well. Email is better for things that need to be kept, such as a detailed confirmation or a quote.