What a reminder is for
A reminder has two jobs, and the second is the one most businesses forget. The first is to stop people forgetting. The second is to give people who cannot come a painless way to say so early enough for the slot to be refilled.
A reminder that only does the first job reduces forgetting. A reminder that does both reduces no-shows, because half of no-shows are not people who forgot. They are people who knew and did not want the awkwardness of cancelling. Give them a button and they press it, and you get the slot back.
Timing
Two reminders, not one, not five.
The first, 48 hours before. This is the cancellation reminder. It arrives while the client still has time to change plans and while you still have time to fill the slot. It says: your appointment is on Thursday at two; if you need to move it, tap here. Most cancellations that come from this reminder are recoverable slots.
The second, a few hours before. Two to four hours on the day, or the evening before for a morning appointment. This is the forgetting reminder. It says: see you at two, here is the address, here is where to park. By now cancellation is less useful to you, so the message is about turning up.
More than two and clients stop reading them. Fewer and you lose one of the two jobs.
Channel
SMS for the day-of reminder. Open rates are near total and it is read within minutes. Costs a few cents per message in most tools, and it is the best money in the diary.
Email for the 48-hour reminder. It carries more information: the cancellation link, the address, the intake form if there is one, the deposit terms. It is also the one that lands in spam if your domain is not authenticated, which is a separate fix and a necessary one.
Both, if the tool allows it, with the same content shape: one clear line of what and when, one clear action.
Consent matters. Marketing messages need explicit opt-in in most countries. Appointment reminders for a booking the client made are transactional and are fine, but keep them strictly about the appointment.
Wording
Short. The client is reading on a phone between other things.
The 48-hour email, roughly:
Your appointment with Sara is on Thursday 12 September at 2:00pm at [address]. Need to change it? Tap here to move or cancel free of charge until Wednesday 2pm. After that the deposit is kept. See you Thursday.
The day-of text, roughly:
Reminder: 2:00pm today with Sara at [short address]. Parking is behind the building. Reply STOP to opt out of texts.
Things that go wrong in wording:
- No action. A reminder with no way to move or cancel makes the client phone you, or not.
- The wrong tone. Threatening language about no-show fees reads badly. State the policy once, plainly, in the first reminder, and leave it.
- Too much. Directions, the full cancellation policy, a request for a review and a discount code, all in the reminder. The client reads the first line.
- A different name. If the client booked with "the salon" and the reminder comes from a tool's brand they have never heard of, they ignore it. Set the sender name to your business.
The settings most tools get wrong by default
Most booking tools ship with one reminder, 24 hours before, by email, with no cancellation link in the body. Change all four:
- Two reminders, at 48 hours and on the day.
- Email for the first, SMS for the second where available.
- The cancel or reschedule link in the first.
- Sender name and reply-to set to your business.
Then send yourself a test booking and read both reminders on a phone as a client would. If you would not act on them, nor will they.
How to know it is working
Your booking tool reports no-shows. Compare four weeks before the change to four weeks after. Also watch two other numbers: cancellations made more than 24 hours out, which should rise, and slots refilled after cancellation, which should rise with them. A reminder system that increases early cancellations is working, because those slots come back.
Reminders, deposits and a booking page that works on a phone are the three things that move no-shows. We configure all three as part of every booking setup, and the reminder wording is one of the few pieces of copy on a site that pays for itself every week.