B2B SMS marketing works when the text is something the recipient asked for and would be annoyed to miss: a reminder for the demo they booked, the room change at the event they paid for, the renewal date on their contract. It fails, often expensively, when it is used as a cold outbound channel. This guide covers where texts earn their place in a B2B funnel, the consent rules in the US, UK and EU with links to the primary sources, a consent form you can adapt, ten copyable templates under 160 characters, and the metrics worth tracking.
One note before we start: this is a practitioner's guide, not legal advice. The rules below are summarised from the regulations and regulator guidance we link to. If you text at volume, have counsel review your consent wording once.
Where B2B SMS Marketing Fits: A Service Channel That Converts
Most B2B SMS marketing advice is borrowed from ecommerce: promo codes, flash sales, abandoned-cart nudges. That playbook does not transfer. B2B buyers do not make a five-figure purchase because of a text, and the people you text are often reading on the phone they also use for family and their bank. A promotional text from a vendor they barely know feels like an intrusion.
Where SMS does pull its weight in B2B is at the moments when time matters and email is too slow or too easy to miss:
- Meeting reminders and reschedules. A booked demo that does not happen is pipeline you already paid for. A reminder with a one-tap reschedule recovers some of those meetings.
- High-intent follow-up. Someone who just requested a demo and gave a mobile number with SMS consent can get a scheduling text in minutes. This is where texting supports speed to lead: the first human response arrives while the buyer is still thinking about the problem.
- Event logistics. Room changes, start times, badge pickup, "starting in one hour" for a webinar. (For capturing the leads themselves, see lead capture at events.)
- Renewal and transactional notices. Contract renewal dates, failed payments, planned maintenance and outages.
- Two-way conversation with an assigned rep once a deal is active and the buyer prefers texting.
What we would not use SMS for: cold outreach to purchased lists, newsletters, content promotion, or "just checking in" nudges. Each of those belongs in email, where the cost of being ignored is low and the consent bar is different. Our guide to B2B marketing newsletters covers that side.
Decision Table: Should This Message Be a Text?
| Message | Time-sensitive? | Recipient asked for it? | Channel |
|---|---|---|---|
| Demo reminder, 1 hour before | Yes | Yes (booked the meeting, opted in) | SMS |
| Scheduling text after a demo request | Yes | Yes, if the form captured SMS consent | SMS |
| Venue change at your conference | Yes | Yes (registered, opted in) | SMS plus email |
| Contract renewal in 30 days | Somewhat | Yes (customer, opted in to account alerts) | Email first, SMS reminder near the date |
| New feature announcement | No | Not specifically | Email or in-app |
| New report or webinar promotion | No | No | |
| First touch to a prospect from a list | No | No | Not SMS |
The rule of thumb: if the message is not time-sensitive and the recipient did not ask for that kind of message, it is not a text.
US Compliance: TCPA, Carrier Rules and 10DLC
"It's B2B, so the consumer rules don't apply" is the most expensive misunderstanding in this channel. The US rules attach to the phone, not to the buyer's job title. A sales director's mobile number is a mobile number.
TCPA consent
The FCC's TCPA rules require prior express written consent for telemarketing or advertising calls made with an autodialer or artificial or prerecorded voice to mobile numbers, and the FCC treats text messages as calls for this purpose. The regulation (47 CFR 64.1200) defines that consent as a written agreement, which can be an electronic signature, that clearly authorises the seller to send those messages to a specific number, and that discloses that agreeing is not a condition of purchase.
Practically, that means a checkbox the buyer ticks themselves, next to wording that names your company, the kind of messages and the number, and says consent is not required to buy. A phone field on a demo form, on its own, is not consent to marketing texts.
Opt-out and revocation
Under the same regulation, a recipient can revoke consent by any reasonable means. A reply of "stop", "quit", "end", "revoke", "opt out", "cancel" or "unsubscribe" counts as revocation per se, and requests must be honoured within a reasonable time, not more than ten business days. A further "revoke all" provision, which would make an opt-out from one type of message apply to all your robocalls and robotexts, has been delayed by the FCC to January 31, 2027 according to Burr & Forman, 2026. Our view: build as if it already applies. One opt-out list across sales and marketing texting is simpler to run and avoids the argument.
Quiet hours
The federal rule bars telephone solicitations to residential subscribers before 8 a.m. or after 9 p.m. in the recipient's local time (47 CFR 64.1200(c)(1)). Several states have their own telemarketing laws as well; Florida's "mini-TCPA" is the best known, and it was amended in 2023 (McGuireWoods, 2023). For B2B we go further than the law: business hours in the recipient's time zone, weekdays only, unless the text is about something happening outside those hours (an evening event, an outage).
CTIA guidelines and carrier expectations
Carriers enforce their own rules on top of the law, based on the CTIA Messaging Principles and Best Practices (May 2023). The parts that matter most for B2B senders:
- Three consent levels. Conversational (the buyer texted first), informational (the buyer gave their number for a specific purpose, such as appointment reminders) and promotional (needs express written consent). Adding a sales call-to-action to an informational text can move it into the promotional category.
- A clear call-to-action at opt-in covering the programme description, the sending number, who you are, any fees, and terms including how to opt out and your privacy policy.
- A confirmation message for recurring programmes, stating the programme name, how to get help, how to opt out, message frequency and that charges may apply.
- Record-keeping: timestamp, collection method, the exact wording shown, the campaign, the IP address and the phone number of each opt-in.
- One opt-in per campaign and sender. Consent is not transferable, and rented or shared opt-in lists should not be used.
- Links: if you shorten URLs, use a shortener on a domain dedicated to you, not a shared public one.
10DLC registration
If you send application-to-person texts from ordinary 10-digit US numbers (10DLC), your brand and each messaging campaign must be registered with The Campaign Registry through your messaging provider, which acts as the Campaign Service Provider. Carriers use that registration to decide throughput and whether to deliver your traffic at all. Unregistered A2P traffic risks being filtered or blocked. Register each use case honestly: a "meeting reminders" campaign that starts carrying promotions is the quickest route to filtering.
UK and EU Compliance: PECR, ePrivacy and GDPR
The UK and EU start from a different place: they distinguish between texting individuals and texting companies.
- UK (PECR). The ICO's guidance treats texts the same way as marketing emails (ICO, electronic mail marketing). For individual subscribers, including sole traders and some partnerships, you need specific consent or the "soft opt-in" for existing customers. For corporate subscribers (limited companies, LLPs, government bodies) PECR does not require consent, but you must identify yourself, give an opt-out in every message and keep a do-not-text list. The ICO also flags that data protection law still applies when you text an identifiable person at a company.
- UK fines. The Data (Use and Access) Act 2025 raised the maximum PECR penalty from £500,000 to £17.5 million or 4% of global turnover (Mishcon de Reya, 2026).
- EU (ePrivacy Directive, Article 13). Prior consent is required for electronic mail marketing to natural persons, with an existing-customer exception for similar products (Directive 2002/58/EC). For legal persons, member states decide, so the B2B rules differ by country, and several are stricter than the UK.
- GDPR. A mobile number tied to a named person is personal data, so you need a lawful basis, a privacy notice and a way to honour the right to object to direct marketing (Regulation (EU) 2016/679, Article 21). We cover the wider picture in our post on B2B data privacy compliance.
Our recommendation for a team selling into several countries: collect explicit, unticked-box consent for SMS everywhere. It costs some opt-ins and saves you from maintaining country-by-country exceptions that nobody will remember in a year.
A Consent Capture Form You Can Adapt
This is an example for a demo request form. The SMS checkbox is separate from the form submit and unticked by default, so a buyer can request a demo without agreeing to texts. That separation is what makes the consent meaningful. For the rest of the form, our guide to lead capture forms covers which fields to keep.
- Work email (required)
- Company (required)
- Mobile number (optional)
- Checkbox, unticked: "Text me about this demo request and my meetings with Northwind at the number above. Up to 4 messages a month. Message and data rates may apply. Reply STOP to opt out, HELP for help. Consent is not a condition of purchase. See our SMS terms and privacy policy."
- Button: "Request a demo"
Behind the form, store the timestamp, the page URL, the exact consent text version, the IP address, the number and the campaign it applies to. If someone audits a complaint a year from now, that record is your defence. Then send the confirmation text (template 1 below) before anything else.
10 B2B SMS Templates Under 160 Characters
Each template uses only standard GSM-7 characters. That matters: one emoji or curly quote switches the message to UCS-2 encoding and drops the single-message limit from 160 to 70 characters (Twilio). Character counts are for the example values shown ("Northwind", "Sam", "Priya"); recount after you swap in your own names and links.
1. Opt-in confirmation (147 characters)
Northwind: Thanks for subscribing to meeting and account alerts. Up to 4 msgs/mo. Msg & data rates may apply. Reply HELP for help, STOP to opt out.
2. Demo reminder, day before (152 characters)
Northwind: Hi Sam, your demo with Priya is tomorrow at 14:00 CET. Join link is in your calendar invite. Need a new time? Reply R. Reply STOP to opt out.
3. Scheduling text after a demo request (144 characters)
Northwind: Hi Sam, Priya here. Saw your demo request. Is a 15-min call today at 15:30 or tomorrow at 10:00 better? Reply 1 or 2. STOP to opt out
4. Webinar starting soon (144 characters)
Northwind: Starting in 1 hour: Pipeline Forecasting Live, 16:00 CET. Join: northwind.io/live. Recording follows by email. Reply STOP to opt out.
5. Event day logistics (140 characters)
Northwind Summit: Doors open 08:30 at Hall B, Expo Centre. Badge pickup at north entrance. Agenda: northwind.io/day1. Reply STOP to opt out.
6. Renewal notice (141 characters)
Northwind: Your contract for 25 seats renews on 1 Dec. Questions or changes? Reply here or email billing@northwind.io. Reply STOP to opt out.
7. Planned maintenance (132 characters)
Northwind: Scheduled maintenance Sat 02:00-04:00 UTC. Exports paused, data safe. Status: status.northwind.io. Reply STOP to opt out.
8. Post-call follow-up from the rep (144 characters)
Northwind: Hi Sam, Priya here. Sending the pricing and security docs you asked for to your email now. Easier to talk Thu or Fri? STOP to opt out
9. No-show recovery (143 characters)
Northwind: Hi Sam, we missed you at 14:00. Want to pick another time? Book here: northwind.io/b/sam or reply with a day. Reply STOP to opt out.
10. Opt-out confirmation (119 characters)
Northwind: You're unsubscribed and won't get more texts from us. Reply START to resubscribe or email help@northwind.io.
Notice what the templates have in common: the sender name first, one piece of information, one action, and the opt-out. Template 8 is the only one that edges toward selling, and it only works because it follows a call where the buyer asked for those documents.
Timing and Frequency Rules
- Send in the recipient's time zone, weekdays, business hours. Store the time zone with the contact; do not infer it from your own office.
- Two reminders per meeting at most: one the working day before, one an hour before. A third is nagging.
- The scheduling text after a demo request goes out as soon as a rep is genuinely available to reply. A text that invites a reply and then gets silence is worse than no text. Route it to the right owner first; our post on lead routing for website leads covers the rules.
- Cap the total. State a frequency at opt-in ("up to 4 a month") and keep under it across all teams. That means one shared sending log, not separate tools in sales, marketing and customer success.
- Never send the text alone for anything important. The renewal, the venue change, the maintenance window: email carries the detail, SMS carries the alert.
Metrics to Track
Delivery and click rates are what SMS tools report by default, but they say little about whether the channel helps pipeline. We would track these instead:
| Metric | How to calculate | Why it matters |
|---|---|---|
| SMS opt-in rate on forms | Submissions with SMS box ticked / submissions with a mobile number | Tells you whether the consent wording is clear and the value is obvious |
| Meeting show rate, with vs without SMS reminder | Held meetings / booked meetings, split by reminder group | The main business case for B2B texting |
| Time to first conversation | Demo request timestamp to first two-way exchange | Shows whether SMS actually speeds up first contact |
| Reply rate on two-way texts | Texts with a reply / texts that ask a question | Low reply rates mean the question was not worth answering |
| Opt-out rate per campaign | STOP replies / recipients | The earliest warning that a campaign feels like spam |
| Delivery failure rate | Failed / sent, by error code | Spikes often mean carrier filtering or registration problems |
Example calculation (illustrative numbers): a team books 200 demos a month. Without reminders, 150 are held (75% show rate). If a reminder test lifts that to 165 held meetings, and the team closes 1 in 10 held demos at an average first-year value of 12,000, the extra 15 meetings are worth roughly 1.5 deals, or about 18,000 of first-year value a month. Run it as a proper split test before believing the lift; our A/B test sample size guide shows why: detecting a move from 75% to 82.5% at 95% confidence and 80% power needs roughly 470 meetings per group, so at 200 meetings a month split in two, close to five months of data.
Tool Categories
- Messaging APIs and CPaaS providers. Programmable sending, number provisioning and 10DLC registration as the Campaign Service Provider. Best when engineering owns the integration.
- Sales engagement and dialer platforms with SMS. Texting inside the rep's sequence, logged against the contact and deal. Best for rep-to-buyer two-way texting.
- Scheduling tools with SMS reminders. The simplest route to meeting reminders, if the tool records consent properly.
- Marketing automation with an SMS add-on. Useful for event logistics to registered attendees, where the list and consent already live.
- CRM. Not a sending tool, but the place where consent status, time zone and the opt-out list must live so every other tool can respect them.
Whatever you choose, check three things before signing: does it record consent with the wording and timestamp, does it sync opt-outs across every sending tool you use, and does it support registration for your use cases in each country you text.
Mistakes That Get B2B Teams in Trouble
- Treating the phone field as consent. A number given for a demo is not permission for marketing texts. Use a separate, unticked checkbox.
- Texting enriched or purchased mobile numbers. Data vendors can sell you a prospect's mobile, but they cannot sell you their consent.
- Separate opt-out lists per tool. The rep's dialer does not know marketing's list got a STOP. Sync opt-outs centrally.
- Drifting from the registered use case. A reminders campaign that starts carrying offers invites carrier filtering.
- Public link shorteners. Shared shortener domains are associated with spam. Use your own domain.
- Emoji and smart quotes. They halve your character budget and can split one message into several billed segments.
- No owner for replies. Every two-way text needs a person or queue watching for answers. An unanswered reply is a lost lead and a worse impression than silence.
SMS is the last mile of a fast follow-up process, not a substitute for it. If demo requests sit unworked for hours, a text will not fix that; a faster routing and handoff process will. Our demo request page examples show how to set expectations on the page so the text that follows feels expected rather than intrusive. If you also want reps to know which company a returning visitor belongs to before they text back, Markettailor's visitor identification adds that context to the lead.
Frequently Asked Questions
Is SMS marketing effective for B2B?
For the right messages, yes. Texts work well for meeting reminders, scheduling after a demo request, event logistics and renewal or service notices, where timing matters and the buyer has asked to hear from you. They work poorly for cold outreach and content promotion, which damage trust, invite opt-outs and carry real legal risk under TCPA and PECR.
Do I need consent to text business contacts?
In the US, generally yes: TCPA consent rules attach to mobile numbers regardless of whether the person is a business buyer, and promotional texts need prior express written consent. In the UK, PECR does not require consent for corporate subscribers, but sole traders need it and data protection law still applies. EU rules vary by country. Explicit consent everywhere is the safest default.
What is 10DLC and do B2B senders need it?
10DLC is application-to-person messaging sent from standard 10-digit US phone numbers. If you send business texts this way, your brand and each campaign, such as meeting reminders or account alerts, must be registered with The Campaign Registry through your messaging provider. Unregistered traffic risks being filtered or blocked by carriers, so register before your first send.
How many texts should a B2B company send per month?
As few as the use case needs, and never more than the frequency you stated at opt-in. For most B2B programmes that means a confirmation, two reminders per meeting and occasional service or event alerts, often under four a month per contact. Track opt-out rates per campaign: a rising rate is the signal that you are sending too much.
How long can a B2B text message be?
A single SMS holds 160 characters in standard GSM-7 encoding. Using an emoji or other non-GSM character switches the message to UCS-2, which holds 70 characters. Longer messages are split into segments of 153 or 67 characters and billed per segment, so keep business texts under 160 characters and put details in a linked page or email.
