Writing SMS copy that actually converts is one of the most underrated skills in marketing. Anyone can write a long-form email with subheadings and a call-to-action button and three different shades of brand blue. It takes real craft to say something meaningful, compelling, and action-worthy in 160 characters or less. It’s marketing haiku. And most people are doing it very, very wrong.
Let’s fix that.
First, Understand What You’re Actually Competing With
When your text lands in someone’s inbox, it’s not sitting in a folder with other “marketing emails.” It’s right next to a text from their partner asking what’s for dinner.
People read texts within three minutes of receiving them, but they decide in about two seconds whether to engage or ignore. Which means your copy isn’t just competing with other brands. It’s competing with real human life.
The 160-Character Constraint Is Lying to You
If you can’t say what you need to say in 160 characters, the problem isn’t the character limit. The problem is that you don’t know what you’re trying to say yet.
Try it right now. Take your last email campaign. Distill it to its actual point. One sentence. What is the thing you want this person to know, feel, or do? If that sentence is longer than 160 characters, keep cutting. Not words. Cut ideas. You probably have three messages crammed into one.
The Anatomy of a High-Converting SMS
Great SMS copy almost always hits four notes, even within a tight character count:
Who it’s for. Not literally “hey [first name]” (though personalization helps), but the message itself should feel like it was written for that specific person. “New listing in the neighborhood you’ve been watching” lands harder than “new listing available.”
What’s in it for them. This is the value. The thing that makes the interruption worth it. A price drop, an exclusive opportunity, a piece of information they actually want. Lead with the benefit, not the feature.
A reason to act now. Urgency isn’t manipulation — it’s clarity. “This one won’t last” is meaningless. “Showing tomorrow at 10am, only 4 spots” is information that drives action.
One job. A text with two calls to action has zero calls to action. Pick the one thing you want them to do — reply, click, call — and make that the obvious next step.
Words That Work (and Words That Don’t)
The English language is not your enemy, but certain words absolutely are.
A Brief, Loving Eulogy for Bad SMS Words:
We gather here today to say goodbye to some phrases that have lived too long and converted too little.
- “Don’t miss out” — died as it lived: vague and unpersuasive.
- “We wanted to reach out” — you’re doing that right now. So why are we stating the obvious?
- “Please be advised” — not a single human being has ever felt warmly toward these words.
- “Limited time offer!!!” — the exclamation points are doing so much work and yet. Nothing.
They will not be missed. In their place, we welcome: specificity, a sense of humor, numbers that mean something, and sentences that sound like they came from an actual mouth.
Embrace these instead:
Specificity. “A home” is forgettable. “A 4BD craftsman in Riverside Heights with an actual backyard” is a text worth reading. Specificity creates mental pictures, and mental pictures create desire.
Conversational contractions. “You are going to love this one” reads like a press release. “You’re going to love this one” reads like a person. Be a person.
Active verbs. “A price reduction has occurred” is passive, lifeless, sad. “Just dropped $15K — want a tour?” is alive.
Numbers. “A significant discount” means nothing. “$20,000 below asking” means everything. Numbers are credible in a way that adjectives never are.
The Character Count Is a Feature, Not a Bug
Here’s a counterintuitive truth: the 160-character limit is the best thing that ever happened to your copywriting.
It forces you to make decisions. Every word has to earn its place. There’s no room for corporate hedging or filler phrases or three different ways of saying the same thing. The constraint creates clarity, and clarity is what converts.
When you sit down to write an SMS, try this: write your first draft with no character limit. Say everything you want to say. Then cut it in half. Then cut it in half again. What’s left is usually the actual message — the thing you were trying to say all along, buried under a bunch of words that were really just you warming up.
That’s your text.
Formulas That Actually Convert
If you’re staring at a blank screen, these frameworks are your friends:
The Alert Formula: [Trigger] + [Specific Value] + [One Action] → “Price drop alert: [Address] just hit $349K. Want to see it this weekend? Reply YES.”
The Exclusive Access Formula: [Status signal] + [Offer] + [Deadline] → “You’re on my VIP list — this listing goes live tomorrow but I’m showing it today. Want in?”
The Curiosity Formula: [Intriguing hook] + [Partial info] + [Click/reply for more] → “Something just listed in [neighborhood] that I think you’re going to want to see. Sending details now.”
The Re-engagement Formula: [Acknowledgment] + [New reason to care] + [Low-pressure ask] → “Hey, I know the timing wasn’t right before — but [address] just dropped and it checks your boxes. Worth a look?”
Notice what all of these have in common: they sound like a human being sent them. Not a brand. Not a CRM. A person who has relevant information and wants to share it.
The Link Problem (And How to Solve It)
Links eat characters. A full URL can torpedo your entire message before you’ve even gotten to the point. Always use a shortened link — Mobiniti handles this automatically — and make sure the link is relevant enough to earn the click.
“Here’s more info: [link]” is not sufficient context. “Full photos + virtual tour here: [link]” tells them exactly what they’re getting. The more specific your link description, the higher your click-through rate. Every time.
Also: if you’re going to include a link, make sure the landing page actually delivers on what you promised in the text. Nothing kills trust faster than a text that says “check out this incredible deal” and a landing page that makes them fill out a form before they can see anything. Respect the click.
Test, Learn, Don’t Guess
The best SMS copywriters aren’t psychic — they’re obsessive about data. A/B testing in SMS is genuinely easy and the feedback loops are fast. Try two versions of the same message: one that leads with price, one that leads with location. One with an emoji, one without. One that asks for a reply, one that asks for a click.
You will be surprised what wins. The message you thought was brilliant will sometimes underperform the one you almost didn’t send. That’s not failure — that’s information. Let your audience teach you how to talk to them.
The One Rule That Overrides All the Others
You can follow every framework, nail the character count, use all the right words — and still write terrible SMS copy if you break this rule:
Be genuinely useful.
The texts that convert best aren’t the cleverest ones. They’re the ones that arrive at the right moment with information the reader actually needed. A price drop alert to someone who’s been watching a property for weeks isn’t marketing. It’s a favor. A showing reminder isn’t interruption. It’s service.
When you write SMS copy, ask yourself: if a friend in real estate sent me this text, would I be glad they did? If the answer is yes — send it. If you’re not sure — edit it until it is.
160 characters is all you need to be genuinely helpful, a little witty, and impossible to ignore. You’ve got this.
Mobiniti makes it easy to write, test, and send SMS campaigns that actually convert. Start building smarter text campaigns today.
