SMS has a 98% open rate and 5x the conversion of email. Here's the exact math on why text marketing delivers the best ROI of any channel and how to use it right.
Brian Pierce
Coastal Solutions Media Team
Let's start with data, because the case for SMS marketing is not theoretical — it's mathematical.
Email marketing:
SMS marketing:
That means SMS converts at 5-10x the rate of email. Every person you reach via SMS is 5x more likely to take action than if you reached them via email.
Speed: Email is checked throughout the day. SMS is read within 4 minutes of receipt, 90% of the time. For time-sensitive offers, SMS is unmatched.
Intimacy: Your phone feels personal. A text from a business feels different than an email — it's interrupting your personal communication space, so it demands more attention.
Convenience: Clicking a link in a text takes one second. Opening an email, scrolling past the header, finding the CTA, and clicking — that's 15-30 seconds. Less friction means more conversions.
Trust: Spam is everywhere in email. People are more willing to trust a text because the barrier to entry for SMS is higher (you have to explicitly opt in).
Before you send a single SMS, understand the rules:
TCPA (Telephone Consumer Protection Act):
CTIA Guidelines:
State laws: Some states have additional requirements. If you're using a reputable SMS platform (Twilio, Attentive, SimpleTexting), they handle most compliance requirements automatically.
The key rule: only text people who have explicitly asked to receive texts from you. Buy lists, scraped numbers, and cold texts are illegal and will get you fined.
Opt-in methods that work:
In-person: "Can we text you appointment reminders and specials? Just give us your number." Put a checkbox on your intake form: "Text me specials and updates."
Website: A dedicated SMS landing page explaining the value you'll send. "Join our text club — get 10% off your first service."
Post-purchase: After someone buys, ask if they want text updates about their order and future promotions.
Social media: Promote your SMS list on every platform. People who follow you on social are already warm leads.
What to send as an SMS list owner:
What NOT to send:
The rule: every SMS should provide clear value to the recipient.
The Welcome Sequence: Day 0: "Hi [Name], thanks for joining [Business] text club! Here's your 10% off code: [CODE]. Valid for 30 days." Day 3: Educational content about your service area Day 7: Social proof (recent review or customer story) Day 14: Soft ask — "Have you had a chance to try us yet?"
Appointment Reminders: 48 hours before: "Hi [Name], reminder: [Service] appointment tomorrow at [Time]. Reply C to confirm, R to reschedule." 2 hours before: "See you tomorrow at [Time]! Reply with any questions before your visit."
Post-Service Follow-Up: Day 1: "Hi [Name], thanks for choosing [Business]! How was your experience? Reply 1-5." Day 3 (if 4-5 stars): "Glad you loved it! Leave us a review? [Review Link]" Day 3 (if 1-3 stars): "Sorry to hear that. Can we make it right? Call us: [Number]"
Re-engagement: "We miss you! It's been [X months] since your last visit. Here's an exclusive offer to come back: [Offer]"
Track these metrics for every campaign:
Deliverability rate: % of messages successfully delivered (should be 95%+) Opt-out rate: % of people who unsubscribe from each message (should be under 0.5%) Click rate: % who clicked links (should be 10%+ for well-targeted messages) Conversion rate: % who completed the desired action (appointment booked, purchase made) Revenue per message: Total revenue generated divided by messages sent
Benchmark numbers to hit:
Mistake 1: Texting too frequently More than one promotional message per week will get you blocked and opt-outs. Even one per week is aggressive for most businesses. One per month with genuine value is sustainable.
Mistake 2: Not personalizing "[First Name], your appointment is tomorrow" feels different from "Your appointment is tomorrow." Use merge fields. Segment your list so people get relevant messages.
Mistake 3: Sending without testing links Always click your own links before sending. Every. Single. Time. Broken links are embarrassing and costly.
Mistake 4: Not having a clear CTA Every SMS should have one action you want the recipient to take. Don't give them five options. Tell them exactly what to do next.
Mistake 5: Ignoring the data If a message doesn't perform, figure out why. Bad timing? Wrong offer? Too long? SMS gives you real-time feedback. Use it.
SMS marketing for most small businesses requires:
Total setup cost: $50-$200/month depending on platform and volume. For a business that sees 50+ new leads per month, even a 1% conversion from SMS offers would generate $500-$2,500 in new revenue per month.
The ROI calculation is simple and the channel is proven. The businesses winning with SMS are the ones who started.