SMS Marketing for Small Businesses: Rules, Tools and Tactics
Text messages land on the device people check most, which makes SMS a powerful channel and an easy one to abuse. Before you send a single promotional text, you need consent, the right setup and a clear reason to interrupt someone's day. This guide covers all three.
Key takeaways
- SMS marketing works best for short, timely messages: reminders, order updates, flash offers and back-in-stock alerts.
- Consent rules are strict and differ by country. In the US, the TCPA and carrier rules apply. In the UK and EU, PECR, GDPR and ePrivacy rules apply.
- Every marketing text should identify your business and tell people how to opt out.
- Send less often than you think. Frequency is the fastest way to lose subscribers.
Email lands in a crowded inbox that people check when they choose. A text message usually triggers a notification on a phone people carry everywhere. That immediacy is why SMS can work so well for time-sensitive messages, and why sending too many, or sending them without permission, damages trust and can create legal risk.
This guide covers what SMS marketing is good for, the main rules by region, how to choose a tool and the tactics that respect your customers. It is not legal advice. Rules change and vary by country, state and industry, so check current requirements or speak to a lawyer before launching. For email, which works alongside SMS, see our article on 12 email marketing tips.
What SMS marketing is good for
SMS shines when a message is short, useful and time-sensitive. Good uses include:
- Appointment reminders for salons, clinics, tutors and repair services
- Order and delivery updates for online stores
- Flash offers and same-day deals for restaurants and local shops
- Back-in-stock and restock alerts for products that sell out
- Event reminders for classes, workshops and launches
- Two-way conversations where customers can reply with questions or bookings
SMS is a poor fit for long content, detailed product education or anything that needs images and links to make sense. That belongs in email or on your website.
Common mistake
Importing your customer phone numbers into an SMS tool and sending a promotion. Having someone's phone number for an order or an appointment does not usually mean you have permission to send marketing texts. In many countries, that requires separate, explicit consent.
The rules: consent by region
SMS marketing is one of the most tightly regulated marketing channels. Here is a broad overview of the main frameworks.
United States: TCPA, carrier rules and 10DLC
The Telephone Consumer Protection Act (TCPA) generally requires prior express written consent before sending marketing texts using automated systems. Consent should be clear, specific to SMS marketing and not a condition of purchase. Messages should identify your business and explain how to opt out, such as replying STOP, and opt-outs must be honored promptly.
Because damages are counted per message, a single campaign sent without proper consent can create large liability. Some states, including Florida and Oklahoma, have their own telemarketing laws with additional requirements such as limits on sending hours.
Beyond the law, mobile carriers set their own rules. Businesses sending application-to-person (A2P) texts from standard 10-digit phone numbers generally need to register their brand and campaign through the 10DLC system, usually via their SMS provider. Unregistered traffic may be filtered or blocked. Short codes and toll-free numbers have their own verification processes. Your SMS provider will guide you through the current steps.
United Kingdom: PECR and UK GDPR
The Privacy and Electronic Communications Regulations (PECR) generally require consent before sending marketing texts to individuals. There is a limited "soft opt-in" exception: you may text existing customers about similar products and services if you collected their details during a sale, gave them a clear chance to opt out at the time and offer an opt-out in every message. UK GDPR also governs how you handle the personal data involved.
European Union: GDPR and ePrivacy rules
EU member states implement the ePrivacy Directive in their own national laws, so details differ by country, but marketing texts to individuals generally require prior consent, with some soft opt-in style exceptions for existing customers in many countries. GDPR sets the standard for valid consent: freely given, specific, informed and unambiguous, with records you can produce if asked.
Elsewhere
Canada's Anti-Spam Legislation (CASL) covers commercial electronic messages, including texts, and requires consent, identification and an unsubscribe mechanism. Australia's Spam Act 2003 has similar requirements. Many other countries have their own consent and do-not-disturb rules. If you text customers internationally, check the rules in each country where your recipients live.
| Region | Main rules | Key requirements |
|---|---|---|
| United States | TCPA, state laws, carrier 10DLC registration | Prior express written consent, opt-out in messages, registered sending numbers |
| United Kingdom | PECR, UK GDPR | Consent or soft opt-in for existing customers, opt-out in every message |
| European Union | ePrivacy rules by country, GDPR | Prior consent in most cases, records of consent |
| Canada | CASL | Express or implied consent, sender identification, unsubscribe |
| Australia | Spam Act 2003 | Consent, sender identification, functional unsubscribe |
How to collect SMS consent the right way
- Use a dedicated opt-in. Add a separate, unticked checkbox or a keyword sign-up (such as "Text JOIN to...") rather than bundling SMS consent into your terms.
- Say what people will get. State the type of messages, roughly how often you will send and that message and data rates may apply where relevant.
- Explain how to stop. Tell people they can reply STOP at any time, and link to your privacy policy.
- Confirm the sign-up. Send an immediate confirmation text that repeats your business name, what they signed up for and how to opt out.
- Keep records. Store when, where and how each person consented. Most SMS platforms log this automatically.
Choosing an SMS tool
SMS marketing platforms range from simple add-ons in email and e-commerce tools to dedicated texting services. Pricing is often based on the number of messages sent, the number of contacts or both, and international messages usually cost more. Prices and features change often, so compare current plans. Look for:
- Built-in consent collection, opt-out handling and consent records
- Help with 10DLC, toll-free or short code registration if you send in the US
- Integration with your store, booking system or email platform
- Segmentation and scheduling by recipient time zone
- Two-way messaging if you want customers to reply
- Clear reporting on delivery, clicks, opt-outs and revenue
Tactics that work without annoying people
Keep messages short and clear
Identify your business at the start, deliver the point in one or two sentences and include a single link or action. Standard SMS messages are limited in length, and longer messages may be split or cost more.
Send at sensible times
Respect the recipient's local time. Avoid early mornings, late evenings and, in many cultures, religious holidays. Some laws and carrier rules set specific quiet hours, so check them.
Make every text worth it
Ask "Would I be glad to get this?" before sending. Exclusive early access, a real deal or a timely reminder passes the test. A generic "check out our new blog post" probably does not.
Send less often
There is no universal ideal frequency, but most small businesses send marketing texts far less often than emails. Watch your opt-out rate after each send, and slow down if it climbs.
Segment your list
Send restock alerts only to people who showed interest in that item, and local event invites only to people nearby. Our explainer on email segmentation covers principles that apply equally to SMS.
Hypothetical example
Suppose a family-run restaurant collects SMS opt-ins at the table with a small card and a keyword sign-up. It sends at most two marketing texts a month: one announcing a seasonal menu and one offering a quiet-night special on a slow weekday. Appointment-style reservation reminders go only to people who booked. Imagine the owner watches opt-outs after each send and finds that the quiet-night offer brings in diners without triggering many unsubscribes, while a third monthly text she tested caused a noticeable jump in opt-outs. She sticks with two.
Pro tip
Keep transactional and marketing texts separate in your mind and your systems. Appointment reminders and delivery updates are often treated differently from promotions under the law. Do not slip a promotion into a reminder unless you have marketing consent for that person.
Measuring SMS results
Because texts cost more per message than email, it pays to know which ones earn their keep. Track a few numbers after every send:
- Delivery rate: a drop can signal carrier filtering or registration problems
- Click rate: use trackable short links from your SMS platform rather than generic link shorteners, which carriers sometimes filter
- Opt-out rate: the clearest sign that a message or your frequency missed the mark
- Revenue or bookings per message: compare this with the cost of sending to see whether a campaign paid off
Compare campaigns against each other over time rather than against published averages, which vary widely by industry and country.
Strengths of SMS
- Reaches people quickly on the device they check most
- Ideal for reminders and time-sensitive offers
- Simple to write and quick to send
Weaknesses of SMS
- Strict consent rules with serious penalties in some countries
- Cost per message is usually higher than email
- Easy to annoy people and lose subscribers
Your SMS launch checklist
- Identify which countries your recipients live in and review the rules for each
- Choose an SMS provider that handles consent records and opt-outs
- Complete 10DLC or other sender registration if you text US numbers
- Add a dedicated, unticked SMS opt-in to your forms or a keyword sign-up
- Write a confirmation text with your business name and STOP instructions
- Plan a maximum monthly frequency and stick to it
- Track opt-outs, clicks and revenue after every send
Frequently asked questions
Can I text customers who gave me their number at checkout?
Not for marketing, in most cases, unless they also gave clear SMS marketing consent or a specific exception applies, such as the UK soft opt-in for similar products. Transactional messages about their order are treated differently in many places.
What is 10DLC?
10DLC stands for 10-digit long code, a standard US phone number used for business texting. US carriers require businesses to register their brand and messaging campaigns before sending at scale from these numbers. Your SMS provider usually handles the registration process with you.
How often should I send marketing texts?
Less often than email. Many small businesses send a few marketing texts per month at most. Tell subscribers the expected frequency at sign-up and watch your opt-out rate to find the right level.
Is SMS better than email?
Neither is better overall. SMS suits short, urgent messages. Email suits longer content, storytelling and product education. Most businesses use SMS for a small number of high-value messages and email for everything else.
Related reading
The bottom line
SMS marketing can be one of your most effective channels if you treat it with care. Get clear, recorded consent, follow the rules in each country you text, register your sending numbers where required and send only messages people will be glad to receive. Start slowly, watch opt-outs closely and use email for anything longer than a sentence or two.
