Missed-Call Text-Back: How It Works and What It Costs

When nobody picks up a call to your business, a phone system automatically texts the caller back, so the conversation can carry on by text. Doing it yourself on GoHighLevel costs $97 a month for the software, about $25 once to register with the carriers, and about a penny per text. It isn't worth it if you already answer nearly every call, or if most of your callers dial from landlines, which generally can't receive texts.

How does missed-call text-back work?

Someone calls and nobody picks up. You're on a roof, under a sink, or with another customer.
The phone system notices the call wasn't answered. For that to happen, the system has to sit in the path of the call. There are three common ways: your business number is moved to the platform; your carrier forwards unanswered calls to a number on the platform; or your website and ads show a platform number that rings through to your phone.
The system texts the caller right away. Something like the sample below.
The reply lands in an inbox and an app on your phone, where you or your office pick up the conversation.

Sample text

Hi, this is Dana with [your business]. Sorry we missed your call. What can we help with? Reply here and we'll get right back to you. Reply STOP to opt out.

One detail matters more than it sounds: which number the text comes from. A text from a number the caller has never seen is easy to mistake for spam. The cleanest setups text from the same number the customer just dialed, so ask about that before you pick a platform.

What does missed-call text-back cost?

Three things cost money: the software, registering your texting with the carriers, and the texts themselves. Here's what doing it yourself on GoHighLevel costs, from its published prices:

Doing it yourself on GoHighLevel, as published in September 2026
Cost	Price	How often
Starter plan	$97	Monthly, or $970 paid yearly
Carrier registration, sole proprietor or low-volume business	$24.50	Once
Carrier registration, high-volume business	$71.91	Once
Campaign fee	$1.50 to $10	Monthly, depending on the type of texting
Each text sent or received	$0.0079	Per text segment
Carrier fee	$0.003 to $0.005	Per text segment, depending on the carrier

GoHighLevel says the registration, campaign and carrier fees are passed through from The Campaign Registry, Twilio and the carriers with no markup, and dates its table to August 2025. For comparison, Twilio's own list price in September 2026 is $0.0083 per text segment on a local number. A short text is one segment; a long one can be several.

An estimate, not a quote: say you miss 40 calls a month and each turns into a four-message conversation. That's 160 texts at 1.1 to 1.3 cents each, all in, or about $2 a month. The software is the real cost, not the texting.

Or have someone set it up and run it. Missed-call text-back is part of our Retrofit plan, $200 a month plus a $300 setup on the website you already have, and of our Growth plan. Here's everything the follow-up system includes.

Either way, texting doesn't start the day you sign up, because the carriers approve the registration first. GoHighLevel's registration fee includes a fast-track review that aims for approval within three business days.

Why do I need A2P 10DLC registration?

Texts sent by software from an ordinary local number are business texts, and US carriers require them to be registered through The Campaign Registry. The registration is called A2P 10DLC, short for application-to-person messaging over 10-digit long codes. GoHighLevel's documentation warns that carriers may block or surcharge messages that aren't registered. In plain terms: skip it, and your texts may never arrive.

Is missed-call text-back legal?

This is general information, not legal advice. The rules that matter:

Federal law. FCC rules require consent before an autodialed or prerecorded call or text to a cell phone. The TCPA lets people sue for $500 per violation, and a court can triple that when the violation was willful or knowing.
Florida law. Florida's telephone solicitation law covers calls and texts sent to sell something. It also allows $500 per violation, up to triple when willful. When someone replies STOP to a sales text, the sender has 15 days to stop.

What that means for how we set it up: the text answers the call the person just made, says who you are, sells nothing, and a reply of STOP ends it. Anything promotional, like coupons or seasonal offers, needs written consent first. If you want to text customers about offers, talk to a Florida attorney before you start.

When missed-call text-back isn't worth it

You already answer almost every call. Look at your call log for a normal week before you pay for anything. If you miss two calls a week, calling them back does the same job for free.
Most of your callers use landlines. A landline generally can't receive a text, and Twilio lists landlines as a cause of failed messages. If your customers are mostly other businesses calling from office phones, check this first.
Nobody will answer the replies. The text starts a conversation. If replies sit for hours, you've kept a customer waiting twice.
You want it for marketing blasts. That's a different tool with stricter consent rules, above.
The math doesn't work. Our missed-call calculator runs your own numbers. It's an estimate, not a promise.

Missed-Call Text-Back: How It Works, What It Costs, When It Isn't Worth It