When to Send an SMS Appointment Reminder: The Right Timing

The best time to send an SMS appointment reminder is 24 to 48 hours before, with an optional second reminder about 2 hours before the appointment. The first gives the customer time to cancel or reschedule so you can refill the slot; the second cuts last-minute no-shows. With Wiiz, you set once how many hours before you want the message to go out, and every new appointment automatically gets its reminder.

Why Timing Is Decisive

A reminder that arrives too early gets forgotten; one that arrives too late leaves no room to react. The goal is twofold: the customer remembers the appointment, and if they cannot make it, they tell you early enough for the hour not to be lost. That is why good timing is worth more than any clever wording.

The 24-48 Hour Reminder: The Foundation

The main reminder should go out 24 to 48 hours before the appointment. In this window:

• The customer has time to check their schedule and cancel or reschedule in good time.
• You have time to offer the slot to someone else — for example from your waitlist.
• The appointment is refreshed in the customer's memory just before its day.

For appointments booked weeks in advance — common in clinics and beauty centers — this reminder is often the only contact between the booking and the appointment day.

The Same-Day Reminder: The Safety Net

A second reminder about 2 hours before the appointment works differently: it aims not at cancellation but at attendance. It reduces late arrivals and last-minute "I completely forgot" cases. It is especially worthwhile for long or high-value services, where an empty slot costs more.

Which Times of Day to Prefer

• Prefer midday and afternoon hours — that is where response is best.
• Avoid very early morning or late evening sends — a reminder at 7 a.m. annoys more than it helps.
• Keep a consistent pattern — customers get used to expecting your message the day before their appointment.

Combinations by Business Type

Not all appointments need the same treatment:

• Hair salons and barbershops: one reminder 24 hours before is usually enough.
• Beauty centers and spas: 24 hours + 2 hours before for long treatments.
• Medical practices and clinics: 48 hours before, so there is time to refill the slot.
• Gyms and trainers: a same-day reminder, a few hours before the session.

How Wiiz Automates It

In Wiiz you define once, in the reminder settings, how many hours before the appointment the SMS should be sent — for example 24 hours, or 24 and 2 hours. From then on, every new appointment schedules its reminders automatically, with no manual action. Each SMS costs from €0.06, and customers with the Wiiz app receive a free push notification instead.

Frequently Asked Questions

How many hours before the appointment should the reminder go out?

The recommended practice is 24 to 48 hours before, so the customer can cancel in time and you can refill the slot. Optionally, add a second reminder about 2 hours before.

Is one reminder enough, or do I need two?

For most appointments one is enough, 24 hours before. The second, same-day one is worth it for high-value or long services, where an empty slot costs more. In Wiiz you freely choose how many reminders and when.

What time of day is best for sending?

Midday and afternoon hours get the best response. Avoid very early morning or late evening sends, which can annoy the customer.

What about appointments booked only hours in advance?

If the appointment is booked inside the reminder window, Wiiz sends whichever reminder still makes sense or skips it — a customer will never get a pointless reminder for an appointment they booked minutes ago.

Does changing the settings cost anything?

No. The Wiiz platform is free and you can change the send times whenever you like. You are only charged from €0.06 for each SMS actually sent.