SMS Marketing Agency UK — 98% Open Rate Marketing | Bambino

Yes — SMS marketing is legal in the UK provided you comply with PECR (Privacy and Electronic Communications Regulations) and UK GDPR. This means obtaining explicit prior consent from recipients before sending marketing texts, providing a clear opt-out mechanism in every message, and keeping records of consent. The ICO (Information Commissioner’s Office) enforces these rules and can issue fines of up to £500,000 for serious breaches. Bambino handles all compliance requirements as part of every SMS programme.

Under PECR, you generally need explicit, freely given, informed, and unambiguous consent before sending marketing SMS messages to individuals. The consent must be specific to SMS marketing — a general privacy policy tick-box is not sufficient. There is a narrow ‘soft opt-in’ exception for existing customers: you can market similar products or services via SMS to customers who purchased from you and did not opt out, provided you gave them a clear opportunity to object at the time of purchase and in every subsequent message.

A healthy SMS opt-in rate depends on the collection method. Pop-up forms on ecommerce sites typically convert at 2–5% of visitors. Checkout opt-ins (where the customer is already engaged) often reach 10–20%. Post-purchase follow-up sequences with an SMS opt-in CTA can achieve 8–15%. For B2C businesses, a well-optimised SMS list-building strategy should grow your subscriber base at 3–8% of total email list size per month. Bambino provides a full list-building strategy as part of every SMS engagement.

SMS to business contacts (corporate subscribers) operates under different rules under PECR. You do not require prior consent to send B2B marketing SMS to corporate subscribers — a limited company, LLP, or Scottish partnership — provided you give them a clear opt-out and honour it promptly. However, sole traders and partnerships in England, Wales, and Northern Ireland are treated as individuals and require consent. In practice, most B2B SMS marketing focuses on existing client relationships, appointment reminders, and event notifications rather than cold outreach.

Bambino’s SMS marketing management starts from £1,200/month, which covers compliance audit, list-building strategy, campaign planning, platform management, send and test, and monthly reporting. Platform costs (message credits) are additional and depend on your list size and send frequency — typically £30–£150/month for small to mid-size lists. We provide a full cost breakdown during your free audit, including projected ROI based on your list size and average order value.

The most effective UK SMS list-building tactics include: website pop-ups with an incentive (discount, free shipping, early access), checkout opt-in checkboxes, post-purchase email sequences with an SMS opt-in CTA, social media lead generation ads, in-store sign-up sheets, and QR codes on packaging or receipts. Bambino designs a bespoke list-building strategy for every client, including compliant opt-in copy, double opt-in flows, and welcome sequence automation to maximise early engagement and reduce churn.

A standard SMS is 160 characters using the GSM-7 character set. Messages longer than 160 characters are split into segments of 153 characters each (to accommodate header data linking the segments) and billed accordingly — a 320-character message counts as two SMS messages. If you use special characters outside the GSM-7 set (such as curly quotes, emoji, or certain accented characters), the message switches to Unicode encoding, reducing the single-message limit to 70 characters. We always review message copy for character efficiency to control costs.