How to reduce no-shows: what the evidence says, and a free three-message reminder chain
Short answer
Reminders reduce no-shows by a modest, well-documented amount: a Cochrane review of eight randomised trials found text reminders raised attendance by about 14% relative to none, and a 54,066-patient trial found two reminders (three days and one day before) beat one. The largest predictors of a no-show are a long gap between booking and appointment and a previous no-show, so the fix is a chain, not a single message. Below: a 48-hour, 24-hour and 2-hour sequence with templates, and a free Make blueprint that sends the 24-hour email from your own sheet.
Five studies on missed appointments and what reminders change, then a free 48h / 24h / 2h reminder chain with message templates and a Make blueprint.
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A no-show costs more than the empty slot. It costs the client you could not book into it, the fifteen minutes you spent waiting, and the awkward call afterwards. Most advice on the subject is a list of tips. This page starts with what has actually been measured, mostly in healthcare, where missed appointments are expensive enough to have been studied in tens of thousands of patients, and then builds the smallest reminder chain that the evidence supports.
Every figure below was read in the original paper or its abstract on 29 September 2026 and is linked at the bottom. A salon, a consultant or a repair business is not a clinic, so the section after the evidence says which findings travel and which do not.
- ~23%average no-show rate for healthcare appointments across 105 studiesDantas et al., Health Policy, 2018
- RR 1.14attendance with a text-message reminder vs none (95% CI 1.03–1.26), 8 randomised trials, 6,615 participantsCochrane review, Gurol-Urganci et al., 2013
- 4.4% vs 5.8%no-show rate with reminders at 3 days and 1 day before, vs a single 3-day reminder, 54,066 patientsSteiner et al., AJMC, 2018
- 8.4% vs 11.1%did-not-attend rate when the SMS stated the cost of a missed appointment, vs the standard message, 10,111 patientsHallsworth et al., PLOS ONE, 2015
What the evidence says
How big the problem is
Dantas and colleagues reviewed 105 studies of no-shows in appointment scheduling for Health Policy in 2018. The average no-show rate across them was about 23%, ranging from 13.2% in Oceania to 43.0% in Africa. More useful than the average is what predicted a no-show. Two factors came up most often: a long lead time between booking and the appointment, and a previous no-show by the same person. Both are things a small business can see in its own sheet.
Do reminders work at all?
The Cochrane review by Gurol-Urganci and colleagues (2013) pooled eight randomised controlled trials with 6,615 participants. Text-message reminders improved attendance compared with no reminder, with a risk ratio of 1.14 (95% confidence interval 1.03 to 1.26); that is, roughly 14% more attendance, relative. Text reminders worked about as well as phone-call reminders (RR 0.99, 95% CI 0.95 to 1.02) and, per attendance, cost 55% to 65% less than a call. The authors rated the evidence moderate quality for those two comparisons. So: a real effect, modest in size, and a message is as good as a call at a fraction of the cost.
How many reminders, and when
Steiner and colleagues at Kaiser Permanente Colorado randomised 54,066 primary-care patients across 25 clinics to one automated reminder three days before, one reminder one day before, or both (American Journal of Managed Care, 2018). No-show rates were 5.8% with the three-day reminder alone, 5.3% with the one-day reminder alone, and 4.4% with both. Among patients judged high-risk of missing, the gap was wider: 25.0%, 24.2% and 20.5%. Two reminders were more effective than one, and the second one did not annoy people measurably; satisfaction was unchanged.
What the message says
Hallsworth and colleagues ran two randomised trials at Barts Health NHS Trust in London (PLOS ONE, 2015), 10,111 and 9,848 patients. In the first, the standard SMS reminder had a did-not-attend rate of 11.1%; a version that stated the specific cost of a missed appointment to the health service, about 160 pounds, brought it to 8.4%. The second trial replicated it: the specific-cost message did 8.2% against 9.9% for a general cost message and 10.7% for an empathy message. Wording alone moved the rate by roughly three percentage points, at no extra cost.
A small, high-no-show setting
Lin and colleagues (International Journal of Pediatrics, 2016) randomised 169 families at an urban paediatric clinic in Cleveland with a very high baseline no-show rate. Adding a text within three days of the appointment to the usual voice message cut the no-show rate from 38.1% to 23.5%. It is a small trial, and the effect is larger than the pooled estimate, which is what you would expect where the baseline is high: reminders help most where the problem is worst.
| Study | Design and sample | Comparison | Result |
|---|---|---|---|
| Dantas et al., Health Policy, 2018 | Systematic review, 105 studies | Average no-show rate; predictors | ~23%; long lead time and a prior no-show predict a miss |
| Gurol-Urganci et al., Cochrane, 2013 | 8 RCTs, 6,615 participants | SMS reminder vs none | RR 1.14 (95% CI 1.03–1.26); SMS ≈ phone call (RR 0.99); 55–65% cheaper per attendance |
| Steiner et al., AJMC, 2018 | RCT, 54,066 patients, 25 clinics | 3-day vs 1-day vs both | 5.8% vs 5.3% vs 4.4% no-shows; high-risk 25.0% vs 24.2% vs 20.5% |
| Hallsworth et al., PLOS ONE, 2015 | 2 RCTs, 10,111 and 9,848 patients | Standard SMS vs SMS stating the cost of a miss | 11.1% vs 8.4%; replicated 8.2% vs 9.9–10.7% |
| Lin et al., Int. J. Pediatrics, 2016 | RCT, 169 patients | Voice message vs voice + text | 38.1% vs 23.5% no-shows |
What travels from a clinic to a small business, and what does not
- Travels: the predictors. A booking made three weeks out is more likely to be missed than one made for tomorrow. A client who missed once is more likely to miss again. Your sheet can flag both.
- Travels: two reminders beat one. The 3-day-plus-1-day result is the basis of the chain below.
- Travels: a text or email is as good as a call. Nobody needs to phone.
- Travels with care: stating the cost. A clinic can say "this costs the NHS 160 pounds". A business saying "this costs me money" reads differently. The version that works commercially is stating what the slot means: "this time is reserved for you; if you can't make it, one tap frees it for someone else".
- Does not travel: the baseline. Clinics average 23%; most small service businesses have no idea of their rate because nobody counts. Count first. The blueprint below writes a status per meeting, which is the count.
- Does not travel: the sizes. Relative reductions of 14% to 25% are the honest expectation for a business already at a low rate. A business at 30% with no reminders at all can expect more, as the Cleveland trial suggests, but not a cure.
The three-message chain
The evidence points to two reminders, one a few days out and one the day before. Add a short same-day message, and the sequence covers the three reasons people miss: they forgot the booking existed, they forgot it was tomorrow, and they lost track of the day. Every message carries one action: a way to move or cancel that takes one tap. A reminder without an exit turns a no-show into a silent no-show; a reminder with one turns it into a reschedule.
| When | Purpose | Channel | Must include | Sent by |
|---|---|---|---|---|
| At booking | Confirm the slot exists; set the expectation that reminders will come | Date, time, place or link, and the reschedule link | The booking tool, or the Tally booking blueprint below | |
| 48 hours before | Catch the ones who forgot the booking exists; give time to reschedule so the slot can be refilled | Email (SMS if you have numbers and consent) | Date, time, a one-tap "move or cancel" | Cal.com workflow, or a second run of the reminder blueprint set to "date = day after tomorrow" |
| 24 hours before | The main reminder: tomorrow at this time | Time, place or link, what to bring, "can't make it" link | The no-show reminder blueprint below (daily 09:00) | |
| 2 hours before | Same-day nudge; the last point at which a cancellation still frees the slot | SMS or WhatsApp if available; else email | Time and place only. One line. | Cal.com workflow ("2 hours before event"), or a scheduled scenario at 15-minute intervals on Core |
Templates
Plain, short, and each with one link. Replace the brackets. Keep the sender a person, not "noreply".
- 48 hours: "Hi [first name], a quick note that your [service] with [your name] is on [weekday] [date] at [time]. If that no longer works, move or cancel it here in one tap: [link]. See you then."
- 24 hours: "Hi [first name], reminder: [service] tomorrow, [weekday] at [time], at [place / video link]. Please bring [item] if relevant. Can't make it? Tap here and I'll offer the slot to someone else: [link]."
- 2 hours: "[First name], see you at [time] today at [place]. [Your name]."
- After a no-show (sent by hand, same day): "Hi [first name], we missed you at [time] today. No problem; here is the link to pick a new time: [link]. If something came up, just reply."
The free automation that sends the 24-hour reminder
The blueprint below is the middle message, the one the evidence weights most. Every morning at 09:00 it searches your meetings sheet for rows with status "booked" and tomorrow's date, sends each client one email with a "can't make it" link, and marks the row so the same reminder never goes out twice. Three modules; about 111 Make credits a month at 40 reminders, which fits inside the Free plan's 1,000 credits (make.com/pricing, checked 2026-09-29).
A meeting tomorrow → a reminder 24 hours ahead, with a "can't make it" link
A no-show is a slot nobody could refill. Every morning, each of tomorrow's meetings gets a reminder email with the time and a "can't make it" link.
One new automation a week, by email
The reminder needs the meeting to be in the sheet first. Two ways to get it there without typing: a free Tally booking form that writes the row and sends the confirmation, or a scheduling tool whose booking webhook does the same and also checks your availability. The comparison of Cal.com and Calendly on their free plans is on its own page; in short, only one of them has a webhook on the free plan.
Booking form → meetings sheet → confirmation email. Feeds the no-show reminder
A booking arrives and nobody confirms it. A Tally form writes the meeting to the sheet, emails the client a confirmation and pings you on Telegram.
Cal.com vs Calendly free plans for automationWebhooks, workflows, event types and the Make connection, compared line by line
Extending it to the full chain
- Add a "48h sent" and a "2h sent" column next to "reminder sent" in the meetings sheet.
- For the 48-hour message: duplicate the reminder scenario, change the date filter to "day after tomorrow" and the mark-as-sent column to "48h sent". On Make's Free plan that is a second active scenario, the plan's limit (checked 2026-09-29); on Core it is one of many.
- For the 2-hour message: if bookings come through Cal.com, use its workflow with the "2 hours before event" trigger, which its FAQ lists as free (checked 2026-09-29). Otherwise this step needs a scenario running every 15 minutes, which costs about 2,976 credits a month in checks and belongs on Core rather than Free.
- Add a "no-show" value to the status dropdown and mark it the same day. After a month, the count of "no-show" against "booked" is your rate, which is the number this whole page is about.
Beyond reminders: the two other levers
- Shorten the lead time. If your calendar allows bookings six weeks out, the far ones are the ones that get missed. Offer nearer slots first, or confirm far bookings with an extra message a week before.
- Treat repeat no-shows differently. A client who has missed once gets the same chain plus a personal message, or a deposit on the next booking. The sheet's status history tells you who they are.
- Make cancelling easy and rescheduling easier. Every message above carries the same one-tap link. People who can move a meeting in ten seconds do; people who have to email you often just do not turn up.
What does not work
- Expecting reminders to end no-shows. The pooled effect is a relative improvement of about 14% in attendance, not a return to zero. Two reminders and a clear exit do better; nothing gets to zero.
- A reminder without a way out. If the only action is "reply to this email", most people who cannot come will do nothing, and you will have a reminded no-show.
- Last-minute bookings. The 24-hour scenario runs at 09:00 and finds tomorrow's meetings. A meeting booked at 11:00 today for tomorrow gets no 24-hour email. Send the confirmation at booking, which covers it.
- SMS without consent or numbers. Email reaches everyone who booked; SMS needs a mobile number, permission in many jurisdictions, and a paid sending service in most tools. Start with email and add SMS for the 2-hour step when you can.
- Copying the clinic wording. "Your missed appointment costs us 160 pounds" worked for a hospital. For a business it reads as a complaint. Say what the slot is worth in the client's terms.
- Not counting. If the sheet has no "no-show" status, you will never know whether any of this worked. Mark every miss on the day.
Do appointment reminders reduce no-shows?
Yes, modestly. A Cochrane review of eight randomised trials with 6,615 participants found text-message reminders raised attendance compared with none, risk ratio 1.14 (95% CI 1.03–1.26), and worked as well as phone calls at 55–65% lower cost per attendance.
How many reminders should I send, and when?
Two at least. In a 54,066-patient trial, reminders at three days and one day before gave a 4.4% no-show rate against 5.8% for a three-day reminder alone and 5.3% for a one-day reminder alone. This page adds a short same-day message and a confirmation at booking.
Is SMS better than email for reminders?
The trials mostly tested SMS, and it performed as well as phone calls. Email has not been compared as directly, but it reaches everyone who booked and needs no consent or sending fee. Use email for the 48-hour and 24-hour messages and SMS or WhatsApp for the 2-hour nudge when you have the number.
What is a typical no-show rate?
In healthcare, about 23% on average across 105 studies, from 13.2% in Oceania to 43.0% in Africa. Small service businesses rarely measure theirs; a "no-show" status in the meetings sheet is the way to find out.
What does the reminder automation cost to run?
About 111 Make credits a month at 40 reminded meetings: one search a day plus two modules per reminder. That fits inside Make's Free plan of 1,000 credits, which also allows two active scenarios (make.com/pricing, checked 2026-09-29).
Should I charge a no-show fee?
The evidence here is about reminders, not fees. A deposit for repeat no-shows is a reasonable policy, and the sheet tells you who they are, but start with the chain: it is free, it is measured, and it does not cost you a first-time client.
Cite or share this page
Quote the tables with a link to this page. For a single figure, cite the study it came from; every one is linked below.
- Dantas, L. F., Fleck, J. L., Cyrino Oliveira, F. L., Hamacher, S. "No-shows in appointment scheduling – a systematic literature review." Health Policy 122(4), 2018
- Gurol-Urganci, I., de Jongh, T., Vodopivec-Jamsek, V., Atun, R., Car, J. "Mobile phone messaging reminders for attendance at healthcare appointments." Cochrane Database of Systematic Reviews, 2013
- Steiner, J. F., Shainline, M. R., Dahlgren, J. Z., Kroll, A., Xu, S. "Optimizing Number and Timing of Appointment Reminders: A Randomized Trial." American Journal of Managed Care, 2018
- Hallsworth, M., Berry, D., Sanders, M., Sallis, A., King, D., Vlaev, I., Darzi, A. "Stating Appointment Costs in SMS Reminders Reduces Missed Hospital Appointments: Findings from Two Randomised Controlled Trials." PLOS ONE, 2015
- Lin, C.-L., Mistry, N., Boneh, J., Li, H., Lazebnik, R. "Text Message Reminders Increase Appointment Adherence in a Pediatric Clinic: A Randomized Controlled Trial." International Journal of Pediatrics, 2016
- Cal.com — FAQ (workflows and webhooks on the free plan)
- Make — Pricing (Free: 1,000 credits, 2 active scenarios, 15-minute interval)
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