Reminders that actually get people through the door

Ask any business owner why someone didn’t turn up and you’ll usually get a theory about the customer. Ask the customer and you’ll almost always get the same sentence: I completely forgot.

That’s worth taking at face value. Someone booked three weeks ago on their phone, on a couch, thinking about something else. The appointment was real for about forty seconds. Everything since then has been competing for the same attention.

A reminder is not nagging. It’s the thing that makes the appointment real for a second time, close enough to the date that it sticks.

When to send

The timing question has a fairly settled answer, and it comes down to one thing: a reminder should arrive while the customer can still do something about it.

A reminder two hours before an appointment is almost decorative. If they’ve double-booked themselves, they can’t fix it in two hours, and neither can you — that slot is gone either way. A reminder the day before catches the conflict while there’s still time to reschedule, which is the outcome you actually want.

• 24 hours before is the workhorse. It lands while the day is still movable, and it’s far enough out that you can refill a cancelled slot.
• A few days before helps for long or expensive appointments, where people may need to arrange time off or childcare.
• Morning-of is worth it for early appointments, and for services where arriving prepared matters — bring the vehicle, wear something you don’t mind getting dirty, come with clean hair.

For most businesses, one well-timed reminder does the bulk of the work. Two is sensible for high-value bookings. Three is where you start becoming the sender people mute.

SMS or email?

They’re not interchangeable, and the difference isn’t really about open rates — it’s about *where the message lands*.

SMS goes to the lock screen. It gets read within minutes, whether or not the person meant to. That makes it right for anything time-critical: the day-before reminder, a cancellation, a change of time. It’s also more intrusive, which is exactly why it works and exactly why you shouldn’t use it for everything.

Email goes to a list. It’s read when someone chooses to read it, it can hold more detail, and it’s cheaper at volume. That makes it right for confirmations — which people go looking for later — and for anything with an address, a receipt, or instructions attached.

The practical split most businesses land on: email the confirmation, SMS the reminder. The confirmation is a record; the reminder is an interruption. Match the channel to the job.

How to write one

A reminder has exactly one job: get the appointment back into someone’s head, correctly, in the two seconds they’ll spend on it. Everything that isn’t that is in the way.

The four things that must be in the first line are who you are, what the appointment is, when it is, and where. If a customer has to open something, scroll, or think in order to get those, the message has already half failed.

• Lead with the day and time, not the greeting. "Tomorrow 2:30pm" earns the glance. "Hi Sarah, we hope you’re well" spends it.
• Use the day name, not just the date. "Thu 14 Aug" is a fact. "Tomorrow, Thursday" is a prompt.
• Say who it’s from. An unfamiliar number saying "your appointment is confirmed" reads as spam and gets deleted.
• Give one action, if any. A single link to reschedule beats a menu of options.
• Don’t sell anything. A reminder that also promotes your new service is a marketing message, and people learn to skim it.

Make cancelling easy on purpose

This is counterintuitive enough that it’s worth saying plainly: your reminder should make it *easy* to cancel or reschedule.

The fear is that you’re inviting cancellations. What you’re actually doing is converting silent no-shows into cancellations you get warning of. Someone who can’t make Thursday isn’t going to come because rescheduling was awkward. They’re just going to not turn up, and you’ll find out at 2pm.

Given a friction-free way out, most of those people reschedule instead — and a reschedule keeps the customer *and* frees the slot. That’s strictly better than an empty hour and a bit of resentment.

Where reminders sit in the bigger picture

Reminders solve forgetting. They don’t solve the person who never really intended to come — that’s what deposits are for. And they don’t solve the late cancellation that leaves you out of pocket, which is a job for a clear cancellation policy.

Together the three cover most of it: a deposit makes the booking real, a reminder makes it real again, and a policy tells everyone what happens when life gets in the way. Any one of them alone leaves an obvious gap.