A bloke I know runs a small physio clinic. Last month he told me his worst day of the week isn't the busy one. It's the day with three empty chairs and a receptionist saying, "They just didn't turn up."
No call. No text. Just a gap in the diary and an hour of wages going nowhere.
He sends reminders already, he reckons. Turns out that means one text, the night before, that says "Reminder: appointment tomorrow 2pm." So it's better than nothing. It's also about the weakest reminder you can send.
This week's fix is the humble no-show. The appointment, the delivery slot, the site visit, the quote call. Anything where a person has to be somewhere and you've blocked out time for them.
Why people don't turn up
They mostly forget. And they aren't villains. Survey evidence cited in a study of NHS outpatient reminders says the main reason for a missed appointment is the patient forgetting it. Source: PLOS One.
And it's a bigger problem than you'd think. Even the NHS, with all its letters and systems, has around 1 in 10 hospital outpatient appointments missed every year in England. If a hospital can't fix that with paper letters, your Tuesday 2pm slot isn't going to fix itself either.
So the job isn't scolding people. The job is making forgetting hard.
The maths on a small business
Let's use made-up numbers, because yours will differ. Say you charge £60 a slot and you run 40 slots a week. If one in ten turns into a no-show, that's four empty slots. Four times £60 is £240 a week. Over a year, that's roughly twelve grand walking out the door before you've bought a single coffee.
Now, sort of halve it. Even if a decent reminder system only claws back half of it, you're looking at six grand a year for an afternoon of setup. Do your own sums with your own price and your own slot count. Takes two minutes on the back of an envelope.
What a proper reminder system looks like
So not one text. A short sequence, and it runs itself.
1. Confirmation the moment they book. Date, time, address, and a link to reschedule. Not buried in an email footer.
2. A reminder a few days out. This is where most people forget the thing and it still feels far away. Ask for a one-word reply to confirm. Replies tell you who's real before the day.
3. A short nudge the morning of. Time, address, parking or entry instructions. Nothing clever.
4. A "reply 2 to reschedule" option. Half your no-shows aren't lazy. They had a sick kid and couldn't face ringing you. Make cancelling easy and you get the slot back with notice instead of silence.
5. An automatic waitlist ping. If someone cancels, text the next person on your list. A cancelled slot you fill beats a no-show you eat.
And every one of these runs from a calendar trigger. Any decent booking tool, CRM or even a calendar plus an automation platform can do it. I'm not going to tell you which one to buy. Use what you've got. If your current tool can't send a text before an event, that's the thing to fix.
The bit nobody does: say what a no-show costs
This is the part I love, because it's free and it's backed by an actual randomised trial.
Researchers in England tested different wording on appointment reminders sent to hospital outpatients. The existing message ended up with a missed-appointment rate of 11.1%. A message that told patients exactly what a missed appointment costs the NHS brought it down to 8.4%. Source: PLOS One. Same patients, same hospital, same channel. Different words.
Look at what they changed. Not the technology. Not the timing. Just the sentence.
And here's the clincher. A second trial found that saying the same thing in vague, general terms worked noticeably worse than being specific about the cost. So "please let us know if you can't make it" does less than "this slot costs us real money when it sits empty."
Now, you're not the NHS and your customer isn't a patient. But the instinct carries over. People cancel more readily when they understand someone on the other end is actually affected. A line like this does the job:
"If you can't make it, reply 2 and we'll give your slot to someone on the waiting list. Empty slots cost us the best part of an hour of someone's wages."
Look, honest, human, specific. Not a threat, not a cancellation fee in 6pt font.
But be clear on the limits as well. That trial ran at a single hospital trust in England, so treat it as a strong hint rather than a law of nature. Test it on your own clients and watch your own numbers for a month.
What not to do
But don't bury people in messages. Three or four touches is plenty. Past that, you're a nuisance, and people mute you.
Don't send reminders from a no-reply address. The whole point is that they can answer.
Don't charge no-show fees as your first move. If you want to, fine, but fix the forgetting problem first. Most of your no-shows will vanish before you need a penalty.
Don't skip the data. Track two numbers: no-shows per month and slots refilled from the waitlist. That's your whole dashboard. If the first drops and the second goes up, it's working.
It isn't only for appointments
Same system works for anything with a time attached. Delivery windows, so the driver isn't knocking on an empty house. Site visits, so your tradie isn't standing in a driveway for twenty minutes. Quote calls, so you aren't dialling into silence. And fitting day for the kitchen, because nobody wants to discover the old units are still bolted to the wall.
If it's in a calendar and a person has to be somewhere, a reminder sequence belongs on it.
Setting it up this week
You can have the lot running in an afternoon.
- Write four short texts: confirmation, early reminder, morning-of, and cancellation reply.
- Add one line saying what an empty slot costs you.
- Set the triggers off the booking time, not the booking date.
- Add a waitlist, even if it's a tag in your CRM.
- Check the first week's replies by hand so you catch anything odd.
So that's it. No consultant, no six-month project. The maths says it pays for itself the first time it saves one slot.
The physio bloke? He turned it on three weeks ago. Reckons he's still got the odd no-show, but the Tuesday gap's gone, and the receptionist has stopped sighing at the diary. Good enough for me, and the maths agrees.
Sources:
- PLOS One, Stating Appointment Costs in SMS Reminders Reduces Missed Hospital Appointments
- GOV.UK, A zero cost way to reduce missed hospital appointments
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Brewed by Steven, poured by Viktor
About Steven Tann: Steven is an AI Ops consultant and 14x GoHighLevel Certified Admin who helps business owners build systems that run themselves. He built and sold a digital agency, and he's the author of You're Selling AI Wrong. He's the bloke who actually does it, not just talks about it. Find out more at steventann.com.