The second you start auto-texting customers back, somebody's going to ask: "Wait, is that even legal?" Fair question. Text messages fall under the same federal law that covers robocalls — the Telephone Consumer Protection Act, or TCPA — and the fines aren't small. Here's what actually matters for a contractor running missed-call text-back and follow-up texts, without the legal-pad version.
Why It Matters
This isn't a "read the fine print someday" problem. The FCC's own telemarketing rules put violations at $500 to $1,500 per text message, and that's per message — not per campaign. Send an automated follow-up to fifty people the wrong way and you're not looking at one fine, you're looking at fifty. For a one-truck operation or a small crew, that's the kind of number that erases a month of profit over a mistake that takes five minutes to avoid.
The good news: the rules that matter for a trades business are narrower than they look, and once you understand the actual line, staying on the right side of it is easy.
The Real Answer
TCPA compliance for texting comes down to one core idea: you need permission before you text someone, and you need to make it easy for them to say stop. Everything else is detail.
Permission (consent) is the big one. If someone calls you, texts you first, or gives you their number on a quote form, responding to them by text is generally fine — that's a normal part of doing business they initiated. Where contractors get into trouble is buying or scraping a list of numbers and blasting cold marketing texts to people who never gave you their number for that purpose. A missed-call text-back is different from a cold marketing blast, and the law treats them differently — but the safest move for any list you didn't get directly from the customer is to not text it without clear consent first.
Reactivation and win-back texts need real consent too. If you're texting an old customer list to bring people back, that's a marketing message, and marketing messages need prior consent — not just "they were a customer once." A number collected for a service call three years ago wasn't collected with permission to send marketing texts today. This is the one place automation can quietly get a contractor in trouble, because it feels like customer service when it's legally treated as marketing.
Opt-out has to be real and immediate. Every text needs a simple, obvious way to stop the messages — a "reply STOP to opt out" line is standard, but it's not just about the words. If someone replies "stop," "please don't text me," or anything else that clearly means "leave me alone," you have to honor it, not just the exact keyword. The FCC's current guidance requires honoring opt-outs made through any reasonable method, not only the STOP keyword.
Timing matters less than people think, but it's not zero. Federal rules restrict live telemarketing calls to between 8am and 9pm local time. Texts aren't identical to calls, but sending a 2am "we missed your call" text isn't a good look and isn't necessary — a text-back that fires the moment you miss a call during business hours, or first thing the next morning for after-hours misses, covers the situation without pushing into hours nobody wants a business text.
What This Looks Like Day to Day
- A homeowner calls about a leak, you miss it, they get an instant text-back. This is the core use case, and it's low-risk — they called you, so a reply text is expected, not unsolicited.
- A lead fills out your website form with their number. Following up by text is fine — they gave you the number specifically to be contacted.
- You want to text your full customer list about spring HVAC tune-ups. This is a marketing message to people who didn't necessarily agree to marketing texts. Don't send this to your whole database blind — only to people who've actually opted in, or stick to a phone call or mailer for the rest.
Common Mistakes
- Treating "they're a past customer" as the same thing as "they consented to texts." It isn't, legally, and it's the single most common way well-meaning follow-up automation turns into a compliance problem.
- Burying the opt-out, or ignoring anything that isn't the exact word STOP. If a customer clearly wants out and keeps getting texted, that's the fine waiting to happen.
- Buying a lead list and texting it cold. No relationship, no consent, no protection — this is the highest-risk move on this list and the easiest one to just not do.
- Assuming a $97/month automation tool automatically makes you compliant. The tool sends the message. You're still the one responsible for who it's sent to and why.
Best Practices
- Keep it simple: text people who contacted you first, or who clearly opted in to hear from you. Everyone else gets a phone call or nothing.
- Make your opt-out line part of every automated text, not just the first one in a sequence.
- If you're building a reactivation campaign off an old customer list, get a real yes first — a single opt-in text asking "Want text updates from us? Reply YES" clears this up before you send anything else.
- When in doubt on a specific list or campaign, five minutes with an attorney beats guessing — this is exactly the kind of question a quick consult resolves cleanly.
Missed-call text-back and lead follow-up work because they're fast and they feel personal. Keep the consent side that simple too — text the people who already want to hear from you, make it easy for anyone else to opt out, and the speed that makes automation valuable never turns into a liability.
This article is general information, not legal advice — talk to an attorney about your specific texting practices if you're unsure where a campaign falls.