SMS and WhatsApp automation for small business: rules, templates and timing
Automate the messages customers want to receive: confirmations, reminders, quote follow-ups, review requests and occasional win-backs. Send them at sensible hours, identify your business in every message, include a way to opt out, and only send marketing to people who agreed. Use SMS by default in the USA and Canada, and add WhatsApp where your customers already use it.
Texts get read. That's the whole case for message automation, and also the reason to be careful with it: a channel people pay attention to is a channel you can wear out fast. This guide covers what to automate, the wording, the timing and the rules.
The five messages worth automating
| Message | Trigger | Payback |
|---|---|---|
| Booking confirmation | Appointment made | Fewer "did it go through?" calls |
| Reminder | 24 hours before | Fewer no-shows |
| Quote follow-up | 2 days after an estimate | More accepted quotes |
| Review request | After the visit or job | More recent reviews |
| Win-back | 6 months without a visit, with consent | Repeat business |
Two more belong in the same system: missed-call text back and instant replies to new leads.
Timing that customers accept
- Confirmations: immediately.
- Reminders: 24 hours before, plus 2 hours before for long appointments.
- Quote follow-up: two working days later, mid-morning.
- Review requests: within a few hours of the job, while it's fresh.
- Marketing: weekdays, mid-morning to early evening, no more than monthly.
- Never: late at night or early morning.
10 templates
Confirmation
Lakeside Dental: you're booked for Tue 14 Jan at 10:30 AM with Dr. Shah. Reply R to reschedule.
Reminder
Reminder from Lakeside Dental: your cleaning is tomorrow at 10:30 AM. Reply C to confirm or R to reschedule.
Two-hour reminder
Northside Heating & Air: your technician arrives between 1 and 3 PM today. Reply here if anything changes.
Quote follow-up
Hi Maria, it's Summit Roofing. Any questions about the estimate we sent Tuesday? Happy to walk through it.
Quote follow-up, second and last
Summit Roofing again. We can hold this week's install dates until Friday. Want one?
Review request
Thanks for choosing Parkway Auto, Chris. If we did a good job, a quick Google review would mean a lot: [link]
Review reply nudge (only if they answered positively)
Glad to hear it! Here's that review link again in case it's easier now: [link]
Win-back (opted-in customers only)
Hi Alex, it's Glow Aesthetics. It's been a while. Want your usual Saturday slot? Reply YES. Reply STOP to opt out.
Recall
Northside Heating & Air: your furnace is due for its annual tune-up. Reply BOOK and we'll send times.
Waitlist
Lakeside Dental: an earlier appointment opened Thursday at 2:15 PM. Want it? Reply YES within the hour.
SMS or WhatsApp?
| SMS | ||
|---|---|---|
| Reach | Every mobile phone | People with the app |
| Setup | Carrier registration in the USA | Business account and approved templates |
| Rich content | Limited | Images, buttons, catalogues |
| Best for | Default for US and Canadian customers | Customers who already message you there |
WhatsApp passed 100 million monthly users in the United States in 2024, about a third of US adults, with higher use in some communities, according to figures compiled by TimelinesAI. If your customers already send you WhatsApp messages, meet them there. If they don't, SMS is enough.
The rules, in plain terms
This is general information, not legal advice.
United States
- Consent. The Telephone Consumer Protection Act requires prior consent for automated texts, with a higher bar for marketing.
- Registration. Carriers require businesses to register (A2P 10DLC) before texting from a standard number.
- Opt-out. Honour STOP immediately.
Canada
- Consent. Canada's anti-spam law (CASL) requires express or implied consent for commercial electronic messages.
- Identification. Each message must identify the sender and how to contact them.
- Unsubscribe. A working way to stop must be included.
Everywhere
- Keep a record of when and how each person agreed.
- Separate transactional messages (your appointment) from marketing (our promotion).
- Keep health, legal and payment details out of messages.
Our guide on AI calls and texts in the USA and Canada covers both systems in more depth.
How to collect consent properly
- On booking forms: an unticked box: "Text me appointment reminders and occasional offers."
- At the counter: ask, and record it.
- By keyword: "Text JOIN to this number for monthly offers."
- Never: assume a business card or an old customer list is consent to market.
Setting it up in order
- Register for business texting (USA) on day one.
- Connect your calendar or booking system.
- Turn on confirmations and reminders.
- Add the review request.
- Add quote follow-up.
- Only then consider marketing messages, to opted-in contacts.
What to measure
| Number | Target direction |
|---|---|
| No-show rate | Down |
| Reviews per month | Up |
| Quotes accepted | Up |
| Opt-out rate | Low and stable |
See CRM & Marketing Automation for what's included and current pricing. Details are on the SMS & WhatsApp automation page.
Frequently asked questions
Is it legal to send automated texts to customers?
Yes, within consent rules. Transactional messages about an appointment or order are the simple case. Marketing messages need the customer's prior agreement. Rules differ in the USA (TCPA, carrier registration) and Canada (CASL).
What is A2P 10DLC?
It's the registration US carriers require before a business sends texts from a standard 10-digit number. Unregistered traffic can be blocked. Registration takes days to weeks.
Should I use SMS or WhatsApp?
SMS reaches every mobile phone, so it's the default in the USA and Canada. WhatsApp is worth adding when a meaningful share of your customers already message you there.
How many texts are too many?
For most local businesses, appointment messages plus one marketing message a month is plenty. If opt-outs rise, you're sending too much.
Want this done for you?
Every plan lists what's included and the price. Or book a free 30-minute call and get a straight recommendation.