Is missed call text back legal? Texting rules for contractors
Missed call text back is legal when the text answers the person who just called your business, because that caller started the conversation and consent for a reply is implied. The risk shows up later, in what the message says and who else gets it.
What the law actually restricts
The federal rule behind the worry is the Telephone Consumer Protection Act and the FCC regulations under it. Those rules do not ban automated texts. They condition them on consent, and they ask for more consent when the message is selling something. A text that is not telemarketing needs prior express consent, which the FCC has long treated as satisfied when a person hands over the number for that purpose. A text that advertises or promotes needs prior express written consent, the signed kind, under 47 CFR 64.1200.
Someone who calls your company and lets it ring has handed over the number, for the exact purpose of being contacted about their project. That is why the carriers' own rulebook, the CTIA Messaging Principles and Best Practices, puts a message the consumer started in its own bucket. It sorts business texting into conversational, informational, and promotional traffic, and treats conversational messaging as carrying implied consent when the consumer initiates. Promotional traffic is the category that needs written consent first.
Where a text back crosses the line
Two things turn a safe reply into a problem. The first is content. "We saw your call, we are on a job, send a note about the project and someone will call back today" answers the caller. "Ten percent off exteriors this month, book now" is an advertisement sent to a stranger, and it needs the written consent nobody gave on a missed call.
The second is reach. Text back fires at a number that dialed yours minutes ago. Loading last year's unconverted leads into the same tool and messaging them all is a different activity with a different consent standard, no matter that the software is the same. If reviving cold leads is the goal, the rules for following up on old leads are not the rules for answering a ringing phone.
Carrier registration and opt-out handling
Before the law matters, the carriers do. Business texting over an ordinary ten-digit number runs through a registration system called A2P 10DLC, where the company and the use case both get registered before traffic flows. No regulator enforces it. It decides something more immediate than legality, which is whether the message arrives at all, because unregistered traffic gets filtered or blocked. Ask any vendor who holds the registration and what happens to it if the relationship ends.
Opt-outs are federal, and they got stricter on April 11, 2025. A consumer can revoke consent in any reasonable way that makes the wish clear, the common words have to work rather than one magic keyword, and the request has to be processed within a reasonable time that cannot exceed ten business days. One confirmation message with no promotional content is allowed. The piece of that order that would make a single opt-out cover every type of message from the same sender sits under an FCC waiver running to January 31, 2027, so the safe assumption is that it lands eventually.
The test takes a minute on a Sunday. Text the word stop to your own business number, then try to make the system text you again.
Washington has its own text message rule
Washington contractors have a state statute to read as well, and it is blunter than the federal one. RCW 19.190.060 says no person conducting business in the state may initiate or assist in the transmission of a commercial electronic text message to a Washington cell number. RCW 19.190.010 defines that as a message sent to promote real property, goods, or services for sale or lease, and RCW 19.190.070 carves out messages to a subscriber who clearly and affirmatively consented in advance. A violation is an unfair or deceptive act under the state Consumer Protection Act.
Read together, the statute points the same direction the federal rules do. The promotional blast is the exposure. A reply to someone who just called asking about a deck is not what the legislature was aiming at, though a careful operator still keeps the automated wording free of offers and prices. Other states run their own telephone solicitation statutes, Florida and Oklahoma among them, so a company working across a state line should check the rules where the phone is ringing.
How the Bellingham companies run it
We run painting and flooring companies in Bellingham, and text back sits on our lines. The settings that keep it boring are the same ones that keep it defensible. It fires only on a missed inbound call, never on a list. It goes out from the business number rather than a tracking number nobody recognizes. The wording says we missed the call, names the kind of work, and asks one question, with no price and no offer in it. Subs, suppliers, and existing customers are excluded so a missed call from a lumber yard does not get a lead capture text. Opt-outs are logged where the office can see them, because a ten business day clock is only short if somebody is watching it.
None of that is legal cover, and it is not meant to be. It is the discipline that keeps the tool doing the job it was bought for, which is turning a missed call into a conversation with a real person. The cost side of that decision sits in missed call text back for contractors, the hours when it works hardest are in after-hours calls for contractors, and the way the whole response workflow fits together is on the homepage.
Texting rules are federal, state, and carrier level all at once, and they change. This article describes how we understand them as of the date shown, and it is not legal advice. Confirm the current requirement with the FCC, your state attorney general, your messaging provider, or an attorney before you act on it.
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