Appointment Reminders via SMS & Email: The Complete Guide
How to set up automatic appointment reminders that really reach customers. Timing, texts and best practices for SMS and email.
Appointment Reminders via SMS & Email: The Complete Guide
98% open rate for SMS. 20% for email. These numbers speak volumes – not every channel works equally well. But if you do it right and cleverly combine channels, you can reduce your no-show rate by 80%.
SMS vs. Email: When Do You Use What?
| Aspect | SMS | |
|---|---|---|
| Open rate | 98% | 20-25% |
| Read within | 3 minutes | 6+ hours |
| Costs | €0.05-0.10/SMS | Minimal |
| Length | 160 characters | Unlimited |
| Links | Possible | Full |
| Attachments | No | Yes |
| GDPR consent | Required | Required |
Bottom line:
- SMS for time-critical things (24h, 4h before)
- Email is perfect for early confirmations, detailed information and rescheduling links
The Optimal Reminder Timing
1 Week Before: Email
Purpose: Appointment confirmation, communicate details
Content:
- Appointment details (What, When, Where)
- Preparation instructions
- Rescheduling link
- Contact option
Example:
Subject: Your appointment on [Date] at [Company]
Hello [Name],
We hereby confirm your appointment:
What: [Service] When: [Date] at [Time] Where: [Address]
For preparation: [Specific instructions]
Appointment doesn't work anymore? [Rescheduling link]
We look forward to seeing you! [Your Team]
48 Hours Before: Email + SMS
Purpose: Activate again, give last chance to reschedule
Email example:
Subject: Reminder: Your appointment day after tomorrow
Hello [Name],
Just a quick reminder: Your appointment with us is in 2 days.
[Appointment details]
If you need to reschedule: [Rescheduling link]
See you then!
SMS example (120 characters):
Hi [Name]! Reminder: [Service] on [Date] at [Time] at [Company]. Reschedule: [Short link]
4 Hours Before: SMS
Purpose: Final reminder, activation
Example (80 characters):
Today 2:00 PM: [Service] at [Company]. We look forward to seeing you!
Or with emoji (108 characters):
⏰ Reminder: Today 2:00 PM [Service] at [Company]. See you soon!
Best Practices for Reminder Texts
DO: ✅
| Principle | Example |
|---|---|
| Personalize | "Hello Mrs. Müller" instead of "Hello" |
| Be specific | "Monday, Jan 15 at 2:00 PM" instead of "soon" |
| Offer action | "Reschedule: [Link]" |
| Keep short | Especially for SMS |
| Stay friendly | "We look forward to it!" |
DON'T: ❌
| Mistake | Problem |
|---|---|
| Too many reminders | Annoying, unsubscribe |
| Too long SMS | Charged as 2 SMS |
| Threatening wording | "For no-show we charge..." |
| Impersonal | "Dear Sir or Madam" |
| No action option | Customer can't reschedule |
Template Examples to Copy
Confirmation (Email)
Subject: Appointment confirmed: [Service] on [Date]
Hello [First name],
Your appointment is booked!
📅 [Service]
🕐 [Date] at [Time]
📍 [Address]
What you should bring:
• [Item 1]
• [Item 2]
Reschedule or cancel appointment:
[Link]
We look forward to seeing you!
[Your Team]
Reminder 48h (SMS)
Hello [Name]! Your appointment at [Company] is in 2 days ([Date], [Time]). Reschedule: [Link]
Reminder 4h (SMS)
⏰ Today [Time]: [Service] at [Company]. See you soon!
Afterwards (Email)
Subject: Thanks for your visit!
Hello [First name],
Great that you were with us today!
How was it? We appreciate your feedback:
[Review link]
Need another appointment?
[Booking link]
See you soon!
[Your Team]
GDPR Compliance
Attention: You need a legal basis for appointment reminders!
Option 1: Contract Fulfillment
Reminders for booked appointments count as part of contract fulfillment — no extra consent needed.
Option 2: Consent
For marketing messages (e.g., "Time for a new appointment?") you definitely need consent.
During booking:
☐ I want to receive appointment reminders via SMS ☐ I want to be informed about offers via email
More on this: GDPR guide for appointment booking
Set Up Automation
With Terminz, set up automatic reminders in 5 minutes:
- Settings → Reminders
- Activate email: 7 days, 48 hours before
- Activate SMS: 48 hours, 4 hours before
- Customize texts (optional)
- Save
From now on, all reminders are sent automatically!
Success Measurement
Track these metrics:
| Metric | Goal | How to measure? |
|---|---|---|
| No-show rate | < 5% | Appointment statistics |
| SMS delivery rate | > 95% | SMS provider |
| Email open rate | > 40% | Email tool |
| Reschedules via link | Increasing | Appointment statistics |
Optimize:
- No-show rate too high? → More/earlier reminders
- Few reschedules? → Place link more prominently
- Complaints? → Fewer reminders or different timing
Common Questions
"How many reminders are too many?"
My recommendation: Maximum 3 per appointment (7 days, 48h, 4h before). If the appointment is shorter notice, just adjust.
"What does SMS sending cost?"
Average: €0.07 per SMS. With 100 appointments/month with 2 SMS per appointment = €14/month.
ROI: One prevented no-show (e.g., €80) = 571 SMS financed.
"Should I use WhatsApp?"
Caution! WhatsApp for business messages is GDPR-problematic (data transfer to Meta/USA). Professional SMS services are the much safer choice.
Automate Now
Terminz offers automatic reminders via SMS and email — free during trial period.
- Create free account
- Activate reminders
- Reduce no-shows
Try free for 30 days.
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