Key takeaways
- A text-back fires in under ten seconds and costs under $0.02 per message on Twilio; the number itself rents for about $1.15 a month.
- 35 of the first 74 numbers I texted from my own system were landlines or fixed VoIP that can never receive a text. Screen the line type before you send.
- A2P 10DLC registration is unavoidable: brand, campaign, an OTP text to the owner's phone, and a review wait, with carriers rejecting every message (error 30034) until it clears.
- Standalone text-back apps run about $30 to $100 a month and GoHighLevel $97 to $297. A system built for your shop has a set build price and a monthly plan for only the services it uses.
- The text is not the system. The callback inside the window you promised is, so the alert has to land on the phone that will actually ring.
How many calls you are actually losing (and why nobody leaves voicemail anymore)
On a roofing or framing day I can miss three to five calls before lunch. In a crawlspace there is no signal. I run Revisions Unlimited the way most owner-operators run their shop: the person doing the work also answers the phone, and the phone loses that fight every time.
What changed is what callers do when they hit voicemail. In my shop, maybe one in five people who reach my greeting leaves a message. The rest hang up and tap the next listing. They are not being rude. They have a leaking pipe or a truck that will not start, and a second business is one scroll away.
The industry numbers agree. Pro Remodeler wrote up a 2018 secret-shopper study of 466 home-services companies: only about 60 percent responded to an inquiry within five days at all (source). Most of the competition is slow. That is good news if you are the one who texts back in eight seconds.
Put rough numbers on it. Say your shop gets 15 calls a week, you miss four, and three of those never leave a message. Close one in four and that is three-quarters of a job a week lost. At a $1,200 ticket, a small repair, not a kitchen, that is about $45,000 a year walking to the next listing. Your numbers will differ. The shape will not.
The second leak never shows up as a lost job: the hours you spend returning missed calls and playing phone tag. The calculator below measures that one.
What the text should say: my copy for a contractor, a repair shop, and after hours
A good text-back does five things in one message: says who you are, admits you missed the call, asks one question, makes one promise with a clock on it, and gives the opt-out the carriers require. Here is the one that fires from my remodeling number:
Jacob at Revisions Unlimited here. Sorry I missed you, I'm on a job site. Text what you need and the address or I'll call back by 4:30. Reply STOP to opt out.
For a repair shop, swap the address for the vehicle; the point is to get the caller typing before you can call back:
Hi, this is [Shop]. We're under a truck and missed you. Text your name, the vehicle and what it's doing; we'll reply within the hour. Reply STOP to opt out.
After hours, the promise changes and you add a pressure valve:
[Business] is closed until 7 a.m. Text what you need and we'll reply first thing. Leak or no heat? Reply URGENT to ring the owner. Reply STOP to opt out.
Three rules I learned by paying for it. Keep the message under 160 plain characters so it sends as one segment; a curly apostrophe or an emoji flips the encoding, cuts the limit to 70, and you pay for two or three segments. Do not pretend a human typed it; people can tell, and your registered campaign calls it automated anyway.
Only promise what you can keep: if the text says 4:30, somebody calls at 4:30, or the text taught the customer you are unreliable faster than voicemail did.
The A2P 10DLC registration nobody warns you about
Every vendor page skips this part. In the US, texting from a regular ten-digit business number is called A2P 10DLC (application-to-person, ten-digit long code), and the carriers require the number to be registered through The Campaign Registry before they deliver a single message. Not recommended. Required. Until it clears, Twilio returns error 30034 on every send and the message never arrives.
Here is what it took me on September 24, 2026, for Style Marking's (320) number:
- Business profile. Twilio's Trust Hub wants the legal name, address, and a contact first. Mine was approved and reused for every step below.
- Brand. Style Marking is a sole proprietorship for tax purposes, so I registered a sole-proprietor brand. That path requires identity verification: a one-time code is texted to the owner's personal mobile and you reply YES from that phone. I did it from my own cell.
- Campaign. You describe the use case in plain English, paste two sample messages, explain how people opt in (they called you), and show your opt-out language. This is where the STOP line comes from; it is not optional copy.
- Messaging service. The number and the campaign have to be attached to the same messaging service. I got this wrong once, had a campaign fail, and rebuilt the service before the second one was accepted for review.
- The review wait. After you submit, the campaign sits in a review queue measured in days, not minutes, on a clock you do not control. Start this before you write a line of code.
Fees are small but real: a one-time brand registration (a few dollars on the sole-proprietor path), campaign vetting of about $15 once, a campaign fee of a couple of dollars a month, and carrier pass-through fees of a fraction of a cent per segment; current amounts are on Twilio's A2P fee page (source). Sole-proprietor brands also carry a daily throughput cap on some carriers, irrelevant for a shop texting back forty missed calls a month.
Renting GoHighLevel does not skip this; its phone system runs on the same carrier rules and asks the same questions, usually in a less forgiving form.
Landlines cannot receive texts: screen the line type first
This one cost me a week. When I launched outreach texting from the Style Marking number, my sender reported everything as sent. It was not getting through. I ran the first 74 numbers through Twilio's Lookup line-type check and found 15 landlines and 20 fixed-VoIP lines: 35 of 74, 47 percent, could never have received a text.
For missed-call text-back the same trap applies. The customer calling from a farm office phone, the older homeowner on a house line, the other contractor on his shop's desk phone: all of them call you, none can get your text, and your system happily reports success while they sit there thinking you ignored them.
The fix is one step before the text fires: a line-type lookup that takes a fraction of a second and costs me about $0.008 per new number, cached so I never pay twice. Mobile or non-fixed VoIP gets the text. Landline or fixed VoIP goes to a call-back queue, where the voicemail greeting promises a specific callback time instead of a text that never comes.
If a vendor cannot tell you what their tool does with a landline caller, it does nothing with a landline caller.
Missed call text back cost: GoHighLevel vs Twilio DIY vs a system built for you
Three honest ways to run this. I have used two of them on my own businesses.
- Rent it inside GoHighLevel. The starter plan is $97 a month and unlimited is $297; missed-call text-back is a built-in workflow. You still pay per message, and you still do the A2P registration. I run it on the Revisions Unlimited site for the chat widget, estimate form, and calendar, so I am paying $97 for an office, not a text-back. If text-back is all you want, it is an expensive way to send a sentence.
- Build it on Twilio yourself. Mechanics: a status callback when a call ends unanswered, a line-type lookup, one API call to send the text. Running cost is about $1.15 a month for the number, a couple of dollars for the campaign fee, and under two cents a message (Twilio US pricing); a shop missing 40 calls a month spends under $5. The catch: somebody writes and hosts the code, handles STOP replies, and keeps the registration healthy.
- Have it built for your shop. A set build price, quoted up front, then a monthly plan that covers only the services it uses, such as the number, texting and support. No one in your shop ever opens a Twilio console. The alert lands on your phone with the caller's number and a tap-to-call button, which is how my own lead alerts arrive.
The comparison is simple once a quote is in hand. Put a typical standalone app at $79 a month, or GoHighLevel at $97, beside the build price and the monthly plan. The plan covers only what you use, so a shop that only needs text-back is not paying for a whole office, and we price it to compete with the rented tools. The calculator above shows the other side: what the phone tag already costs you in hours.
An answering service or an AI receptionist handles a different call, the one where the caller needs a conversation right now rather than an acknowledgment and a callback, and is priced well above the rented text-back tools listed here. I priced both against a small shop's real call volume in a separate post on what an AI receptionist really costs a small business, so I will not repeat it here.
Is it legal to text someone who just called you? (not legal advice)
I am a contractor who registered a texting number, not an attorney, so this is what I checked before I turned mine on; confirm it with yours.
A single non-marketing text that answers a call the person just placed to you is exactly the use case the A2P campaign form is built around, and it is the kind of message the TCPA treats differently from an unsolicited sales text.
The lines you do not cross: do not drop that caller into a marketing drip without written consent, do not text before 8 a.m. or after 9 p.m. in their time zone, honor STOP instantly and keep the record, and say who you are in the first sentence. Minnesota layers its own telemarketing rules on the federal ones, another reason the message stays informational.
The practical version: the text-back is an acknowledgment, not an ad. Keep it that way and compliance stays boring, which is what you want.
Where this fits in a lead system: form alerts, follow-up, and what to do this week
Text-back is one trigger on a pipe you should already have. A missed call, a form filled out at 10 p.m., a Google Business Profile message: all of them should end at the same place, a push on your phone with the name, the number, and a button that dials. Mine arrive exactly that way for both the remodeling business and the agency.
The form side of the pipe is in how I get a text when someone fills out my website form; the call side starts with getting found, covered in Google Business Profile for contractors.
It does not have to be fancy. A diesel shop in central Minnesota I built a site for runs the simplest version there is: the quote form emails the owner, and the owner calls back. That beats most of the industry by itself. Text-back is the next step, not the first.
If you want to start this week without hiring anyone:
- Pull your carrier's call log for the last two weeks and count the missed calls with no voicemail. That is your real number, not a vendor's percentage.
- Write the text. Steal mine above and change the name and the callback time to one you can keep.
- Start the A2P 10DLC registration today, whichever platform you end up on. It is the long pole and nothing sends until it clears.
- Compare the rented tools with the numbers above. If you want it built for your shop, the quote is free: a set build price up front and a monthly plan for just the services you use, and you talk to me, the person who did his own registration: automation services or contact. If the site is the weak link, see websites for trades and websites for contractors; what to automate first is in AI automation for small businesses in Minnesota and under AI automation.
Frequently asked questions
It is an automatic text that goes to any number that calls your business and does not reach a person, usually within seconds of the hang-up. The text says who you are, that you missed the call, asks what they need, and promises a callback time. Its job is to keep the caller from dialing the next listing while you finish the job in front of you.
Rented inside a platform like GoHighLevel, roughly $97 to $297 a month plus message usage; standalone tools typically run $30 to $100. Run on Twilio directly it is about $1.15 for the number, a couple of dollars for the A2P campaign fee, and under two cents a message, so a shop missing 40 calls a month pays under $5. A system built for your shop has a set build price, quoted up front, and a monthly plan for just the services it uses, priced to compete with the rented tools.
Rarely. In my own remodeling business maybe one in five callers who reach the greeting leaves a message; the rest hang up and call the next company. A text that arrives in seconds does what voicemail used to do: it proves someone is there and gives the caller a way to keep talking without waiting.
A2P 10DLC is the US carrier program for business texting from regular ten-digit numbers. Your brand (the business) and your campaign (what you send and how people opt in) have to be registered and approved before carriers deliver anything. Until then, every message fails; on Twilio it shows as error 30034. Registration takes a business profile, an identity check, a campaign form, and a review wait of days.
Yes. A Twilio number, an A2P 10DLC registration, a line-type lookup, and a small function that sends the text when a call ends unanswered is the whole system. On Twilio, the number, campaign and message charges come to a few dollars a month. You either write and host that function yourself or have it built for you, with a set build price and a monthly plan that covers the hosting, texting and support.
Who you are, that you missed them, one question (what do you need, where, or which vehicle), one promise with a time you can keep, and a STOP opt-out line. Keep it under 160 plain characters with no emoji or curly quotes so it sends as a single segment. Mine: 'Jacob at Revisions Unlimited here. Sorry I missed you, I'm on a job site. Text what you need and the address or I'll call back by 4:30. Reply STOP to opt out.'
Want the text-back wired to your own number?
Tell me what you run on today (carrier only, GoHighLevel, nothing) and how many calls you miss in a week. I'll come back with a clear scope, a set price for the build and a monthly plan for just the services you need. No templates. You talk directly with the person who registered his own number.
Founder, Style Marking · owner, Revisions Unlimited. Jacob builds custom websites, apps and operations systems for small-business owners — and runs a remodeling company on the same tools he builds for clients. Every post here comes from systems he has actually shipped.