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Appointment reminder text templates for a UK clinic

Five texts a clinic can fill in on screen: the booking confirmation, the reminder, a reminder that names the missed appointment fee, the message after a missed appointment and the offer of a slot that has come up. Each fits in one 160 character text. The one UK trial that tested reminder wording found that stating the specific cost of a missed appointment cut missed appointments from 11.1 to 8.4 per cent.

Last checked 16 October 2026

The five texts #

Each one copies as plain text, ready to paste into your booking system’s message settings or a phone. Type over the brackets, then check the count: with a clinic name of about 16 characters and a full phone number, every one of them fits in a single text.

1. Booking confirmation

Click anything in brackets to type over it, then copy, print or download the result. Nothing you type leaves this page.

[Clinic name]: booked with [clinician], [Tue 21 Oct] at [2:30pm]. To cancel or move it, call [phone number] [24 hours] ahead. Policy: [short link]

2. The reminder

Click anything in brackets to type over it, then copy, print or download the result. Nothing you type leaves this page.

[Clinic name]: a reminder of your appointment with [clinician] on [Tue 21 Oct] at [2:30pm]. Can't make it? Call [phone number] to cancel or move it.

3. The reminder that names the fee

Click anything in brackets to type over it, then copy, print or download the result. Nothing you type leaves this page.

[Clinic name]: see you [Tue 21 Oct] at [2:30pm]. Missing it without [24 hours'] notice costs [£0.00] under our policy. To cancel or move it, call [phone number]

4. After a missed appointment

Click anything in brackets to type over it, then copy, print or download the result. Nothing you type leaves this page.

[Clinic name]: sorry we missed you today at [2:30pm]. We hope all is well. To book again, call [phone number] or go to [booking link]

5. A slot has come up

Click anything in brackets to type over it, then copy, print or download the result. Nothing you type leaves this page.

[Clinic name]: an appointment has come up with [clinician] on [Tue 21 Oct] at [2:30pm]. Reply YES by [11am] or call [phone number] to take it. First reply gets it.

Text 3 only works for private appointments with a fee in a policy the patient saw before booking. The no show policy template sets out what makes that fee fair. Its letters cover the step after text 4.

What the one UK wording trial found #

The systematic reviews behind most reminder advice show that sending one helps. The trials Hallsworth and colleagues ran at an NHS trust in England, published in PLOS ONE on 14 September 2015, asked whether the words help. Outpatients were sent one of four texts five days before their appointment, about 10,000 patients in each trial.

What the text addedDid not attendCompared with
The specific cost of a missed appointment to the NHS (Trial One)8.4%11.1% for the trust’s existing text
The same, repeated (Trial Two)8.2%The cost in general terms: 9.9%
The phone number to cancel, in the text itself (Trial One)No significant effect11.1% for the existing text
That most people attend (Trial One)No significant effect on non-attendanceMore cancellations: 10.5% against 8.8%

Two things carry over to a clinic. A specific figure did better than the same idea in general terms. And a text that leads to a cancellation is not a failure: the authors point out that a cancellation is one route to avoiding a missed appointment. It also gives the time back while it can still be offered to somebody else.

Fitting it in one text #

A standard text holds 160 characters, spaces included. GOV.UK Notify’s pricing page sets out how longer messages are counted:

LengthCounts as
Up to 160 characters1 text
Up to 306 characters2 texts
Up to 459 characters3 texts

Two things push a short text over. Square brackets, curly brackets and the euro sign count as two characters each, so take out every bracket when you fill a template in. And a non-standard character, such as some Welsh letters, cuts the limit to 70 characters for the whole message.

Two rules a reminder sits under #

It is a service message, so keep offers out

The ICO’s guide to PECR says routine customer service messages, giving people information they need about a current contract, do not count as direct marketing. A reminder of an appointment the patient booked is exactly that. If it carries significant promotional material, such as an offer on another treatment, it includes marketing and the PECR rules apply to it.

It can be health data, so leave the treatment out

The ICO’s guidance on special category data says health data can include appointment details, reminders and invoices which tell you something about a person’s health. It gives a list of appointments at an osteopath clinic as an example. A text is read on a lock screen, sometimes by somebody else. These templates give the time and the clinician and stop there. The patient data page covers what that means for the practice as controller.

How to use them well #

  • Send the confirmation at booking

    It is the moment the patient sees how to cancel and where the policy is, which is what makes a fee fair later.

  • Pick one reminder and one timing

    The trials sent theirs five days ahead. Whatever you choose, send every reminder on the same rule so you can see whether it works.

  • Count what comes back

    Cancellations, moves and missed appointments, month by month. A reminder that brings in more cancellations is doing its job if the slots get refilled.

  • Only promise a reply you will read

    Text 5 asks for a reply. Use it only if somebody owns the inbox, or take the line out and leave the phone number.

What happens to them by hand #

The wording is the easy part. The appointment reminders guide explains why reminders stop going out when the front desk is busy. The work around these five texts follows the same rules every time.

Runs on rules

  • Sending the confirmation and the reminder, which is a date and a template
  • Spotting a patient with no mobile number on file
  • Sending text 4 when an appointment has no arrival recorded
  • Offering a cancelled slot to the waiting list in order

Needs a person

  • Reading a reply that says more than yes or no
  • Deciding whether a missed appointment is a clinical worry
  • Deciding whether to charge

What the published figures say about how often patients miss is on patient no shows. Filling a slot at short notice is on cancellations and rebooking. The missed calls calculator puts a number on the calls that reach the clinic while nobody can answer.

Questions people ask

What should an appointment reminder text say?
Who it is from, the day and time, who the appointment is with and how to cancel or move it, with the number written out in the text. Leave out the treatment. A UK trial of hospital reminders found that adding a specific cost of a missed appointment cut missed appointments from 11.1 to 8.4 per cent.
How long can an appointment reminder text be?
A standard text holds 160 characters including spaces. Longer than that and it counts as two messages, up to 306 characters, then three. Every template on this page fits in one text when filled in with typical details.
Do I need consent to send appointment reminder texts?
Not under the marketing rules. The ICO says routine customer service messages, which give people information they need about a current contract, do not count as direct marketing. Put an offer or a promotion in the reminder and it becomes marketing and the PECR rules apply.
Is an appointment reminder text personal data?
Yes. It can also be health data. The ICO’s guidance names appointment details, reminders and invoices as health data where they reveal something about a person’s health. It gives a series of appointments at an osteopath clinic as an example. That is why these templates name the time and the clinician, never the treatment.

Where these numbers come from

  1. Hallsworth and others, Stating appointment costs in SMS reminders reduces missed hospital appointments: findings from two randomised controlled trials, PLOS ONE 10(9), 14 September 2015, read 16 October 2026. Outpatients at one NHS trust in England, about 10,000 appointments in each of two trials, reminders sent five days ahead. Stating the specific cost to the NHS: 8.4% did not attend against 11.1% for the existing message (Trial One), 8.2% on replication against 9.9% for the cost in general terms (Trial Two). Putting the phone number in the text had no significant effect on non-attendance
  2. GOV.UK Notify, Text message pricing, last updated 1 April 2026, read 16 October 2026. A text message longer than 160 characters including spaces counts as more than one: up to 306 characters is two, up to 459 is three. With a non-standard character anything over 70 characters counts as more than one. [ ] { } ^ \ | ~ and € count as 2 characters each
  3. ICO, Guide to PECR: electronic and telephone marketing, updated 20 August 2025, read 16 October 2026. Routine customer service messages do not count as direct marketing; a message with significant promotional material aimed at getting customers to buy extra products or services includes marketing material and the rules apply
  4. ICO, What is special category data?, updated 9 April 2024, read 16 October 2026. Health data can include appointment details, reminders and invoices which tell you something about the health of the individual; a list of appointments at an osteopath clinic is given as an example

Last checked 16 October 2026.

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