Top 10 SMS Marketing Campaign Best Practices

Overview

SMS marketing is one of the most effective channels available to businesses today, with open rates far exceeding email and near-instant delivery to your customers' pockets. However, with that power comes significant responsibility. SMS is also one of the most heavily regulated marketing channels, and getting it wrong can result in carrier filtering, customer complaints, legal liability, and damage to your brand.

This article provides best practice guidance to help you run effective, compliant, and customer-friendly SMS marketing campaigns through bLoyal.

1. Build Your List the Right Way — Consent First

The foundation of every successful SMS program is a properly consented subscriber list. This is not just best practice — it is a legal requirement.

Always obtain explicit opt-in consent before sending any SMS message. This means the customer must take an affirmative action to agree to receive messages from you. Simply having a customer's phone number from a past purchase is not sufficient.

Compliant Opt-In Methods

Website form — Add an SMS opt-in checkbox to your checkout flow, account registration page, or a dedicated sign-up page. The checkbox must be unchecked by default and include clear disclosure language such as:

"By checking this box I agree to receive SMS marketing messages from [Business Name]. Message & data rates may apply. Message frequency varies. Reply STOP to unsubscribe."

Keyword opt-in — Promote a keyword that customers can text to your number to subscribe, for example "Text DEALS to 12345 to receive exclusive offers." This method creates a clear, documented record of consent.

In-store sign-up — Collect mobile numbers on paper or tablet forms at point of sale with clear consent language included on the form.

Email invitation — If you have an existing customer email list, invite customers to opt in to SMS through an email campaign. Never send an unsolicited SMS to an existing customer database to ask for SMS consent — this approach carries significant legal risk under TCPA.

What to Avoid

• Never add customers to your SMS list without their explicit consent
• Never assume a phone number provided during checkout constitutes SMS consent unless opt-in language was clearly presented at that point
• Never send a "welcome" SMS to a cold list as a way to build consent — this is considered a TCPA violation
• Never purchase or rent phone number lists for SMS marketing

2. Set Clear Expectations at Opt-In

When a customer opts in, they should know exactly what they are signing up for. Your opt-in disclosure must include:

• Your business name
• The types of messages they will receive (promotions, alerts, reminders, etc.)
• Approximate message frequency (e.g. "up to 4 messages per month")
• That message and data rates may apply
• How to opt out (Reply STOP)
• How to get help (Reply HELP)
• A link to your Terms and Conditions and Privacy Policy

Setting clear expectations at opt-in reduces opt-outs, spam complaints, and carrier filtering down the line.

3. Send a Strong Welcome Message

Your welcome message is your first impression and sets the tone for your entire SMS program. Send it immediately after a customer opts in while the brand interaction is fresh.

A good welcome message should:

• Confirm the opt-in and thank the customer
• Remind them of your business name
• Tell them what to expect
• Optionally include a welcome offer to reinforce the value of subscribing
• Include opt-out instructions

Example:

"Welcome to [Business Name] SMS alerts! You'll receive exclusive offers and updates up to 4x/month. Show this msg for 10% off your next purchase. Msg & data rates may apply. Reply STOP to unsubscribe."

4. Deliver Real Value in Every Message

Customers opted in because they expected value. Every message you send should earn its place in their inbox. Ask yourself before sending: would a customer be glad they received this?

High-value message types:

• Exclusive discounts or offers available only to SMS subscribers
• Early access to sales or new products
• Time-sensitive flash sales
• Loyalty points balance updates and reward notifications
• Personalized offers based on purchase history
• Appointment or event reminders

Low-value messages to avoid:

• Generic messages with no clear offer or call to action
• Repetitive messages that say the same thing week after week
• Messages that simply repeat what was already sent by email with no added value

5. Get Your Timing Right

SMS messages are read almost immediately — which is a strength, but also means poor timing is immediately felt by the customer.

Best practices for timing:

• Send during business hours in the recipient's local time zone — generally between 10am and 8pm. Avoid early morning, late evening, and overnight sends.
• Match timing to the message — a flash sale message should go out at the start of the sale, not hours before or after. A lunch promotion should go out around 10:30–11am.
• Avoid over-sending — most SMS programs perform best at 2–6 messages per month. Exceeding this without strong justification leads to increased opt-outs.
• Respect holidays and events — be thoughtful about sending during sensitive periods. A promotional message sent during a national tragedy or major news event will land badly.
• Space out messages — avoid sending multiple messages in a short period unless responding to a specific customer action.

6. Write Effective SMS Copy

SMS messages have a 160-character limit for standard SMS (longer messages are split or sent as MMS). Every character counts.

Writing tips:

• Lead with value — put the most important information first. Customers read the first line and decide whether to keep reading.
• Be clear and direct — avoid jargon, ambiguity, or overly clever copy that obscures the offer
• Always identify your brand — recipients should immediately know who the message is from, especially if your sending number is not saved in their phone
• Include a clear call to action — tell the customer exactly what you want them to do: "Shop now," "Book today," "Claim your reward"
• Include a link if needed — use a shortened URL to drive traffic to a landing page, but make sure the link destination matches the promise of the message
• Always include opt-out language — "Reply STOP to unsubscribe" must be included, particularly in promotional messages. It can be abbreviated in subsequent messages once it has been included in the welcome message, but should appear periodically.

Character count tips:

• Standard SMS: 160 characters
• Messages over 160 characters are sent as multipart SMS (charged as multiple messages)
• MMS (with images): up to 1600 characters but higher cost and not supported by all carriers equally

7. Personalization and Segmentation

Generic broadcast messages are becoming less effective as customers expect relevance. Use the data available to you to send more targeted messages.

Segmentation ideas:

• Purchase history — send product-specific offers to customers who have bought in that category before
• Loyalty tier — reward your highest-value customers with exclusive or early-access offers
• Location — send store-specific messages to customers near a particular location
• Engagement level — re-engage lapsed customers with a win-back offer, and reward highly engaged subscribers with VIP perks
• Birthday or anniversary — send a personalized offer on a customer's birthday or membership anniversary

Personalization tips using bLoyal Handlebars:

• Use the customer's first name where natural — avoid forcing it if it reads awkwardly
• Providing customer specific information such as loyalty balances or awarded coupons
• Reference recent activity when relevant (e.g. "Thanks for your recent visit")
• Avoid over-personalization that feels intrusive or surveillance-like

8. Always Honor Opt-Outs Immediately

When a customer replies STOP (or any standard opt-out keyword including CANCEL, END, QUIT, or UNSUBSCRIBE), they must be removed from your active list immediately and permanently. This is both a legal requirement and a carrier requirement.

• Send a one-time confirmation message acknowledging the opt-out
• Do not send any further marketing messages to that number
• Do not re-add the number to your list without a new explicit opt-in from the customer
• Honor opt-outs across all campaigns — opting out of one campaign should opt the customer out of all SMS marketing from your business unless they have separately consented to distinct programs

9. Monitor and Measure Performance

Track the performance of your SMS campaigns to understand what is working and continuously improve.

Key metrics to track:

Benchmarks to watch:

• Opt-out rates above 2–3% per campaign suggest your content, frequency, or targeting needs adjustment
• Delivery rates below 95% may indicate list quality issues or carrier filtering
• Consistently low click-through rates suggest your offers or copy need improvement

10. Stay Compliant — Ongoing Requirements

Compliance is not a one-time setup task. It requires ongoing attention.

• Keep your 10DLC registration current — if your messaging use case, content, or volume changes significantly, update your campaign registration
• Maintain your opt-in records — keep documentation of how and when each subscriber consented, including the opt-in method and date. This is your defense in the event of a complaint or legal action.
• Review your Terms and Conditions and Privacy Policy regularly — ensure they accurately reflect your current messaging practices
• Stay current with regulations — TCPA, CTIA guidelines, and state-level laws continue to evolve. What is compliant today may need updating as regulations change.
• Train your team — anyone involved in creating or sending SMS campaigns should understand the compliance requirements

International Considerations

If you send SMS messages to customers in Canada, the EU, or Australia, be aware that the regulatory requirements are significantly stricter than in the US:

• Canada (CASL) — Express consent required for all commercial messages. Implied consent is time-limited (24 months from last purchase). Penalties up to $10M CAD.
• European Union (GDPR/ePrivacy) — Explicit opt-in required for marketing. Strict rules on lawful basis for processing. Fines up to €20M or 4% of global revenue.
• Australia (Spam Act 2003) — Express or inferred consent required. All messages must include sender identification and a functional unsubscribe mechanism.

If you operate in any of these markets, consult with legal counsel familiar with the applicable regulations before launching your SMS program.

Quick Reference Checklist

Use this checklist before launching any SMS campaign:

• [ ] All recipients have explicitly opted in to receive SMS messages
• [ ] Opt-in records are documented and stored
• [ ] 10DLC campaign registration is active and up to date
• [ ] Message clearly identifies your business name
• [ ] Message delivers clear value to the recipient
• [ ] Sending time is appropriate for the recipient's time zone
• [ ] Message frequency is reasonable (generally 2–6/month)
• [ ] Opt-out instructions are included
• [ ] Links have been tested and work correctly
• [ ] Message has been reviewed for spelling, accuracy, and tone
• [ ] Segment or personalization data has been verified for accuracy

Need Help?

If you have questions about setting up your SMS program, completing your 10DLC registration, or ensuring your campaigns are compliant, our team is here to help.

Submit a support request at the My Support Portal or email us at support@bloyal.com 

This article is provided for informational purposes only and does not constitute legal advice. We strongly recommend consulting with qualified legal counsel for guidance specific to your business and jurisdiction.