SMS is the most reliable delivery channel in marketing. That statement is harder to make about email, harder to make about push notifications, and impossible to make about social. An SMS message, sent to a valid number, reaches an active handset within seconds. It's read within 3 minutes on average. It is not filtered by an algorithm, not blocked by a spam folder, and not deprioritised by an inbox AI.
Those characteristics make SMS uniquely powerful for time-sensitive communications. They also make it uniquely easy to damage with overuse. A channel that guarantees delivery only works as a trust-building asset if the messages it delivers are worth receiving. When they're not, opt-outs are swift and permanent.
Here are the 2026 benchmarks, with context for what they mean in practice.
Open rate
Industry-reported SMS open rates range from 95-98%. This metric is less informative than it sounds: because SMS delivers to a lock screen or notification bar, most messages are "seen" (and therefore counted as "opened") whether or not the recipient acts on them. The open rate is a delivery confirmation metric, not an engagement metric.
The more meaningful engagement metric for SMS is click-through rate, the proportion of recipients who tap the link in the message, which strips out passive noticing and measures intentional engagement.
Click-through rate by category
2026 SMS CTR benchmarks by industry:
- Retail/e-commerce: 8-14%. Highest performance for time-limited promotional messages (flash sale, early access). Drops to 3-6% for standard campaign broadcasts without urgency framing.
- Financial services: 6-11%. Transactional alerts (payment due, fraud alert) significantly outperform promotional messages. Brands that mix transactional and promotional in the same programme see degraded CTR on both.
- Food & beverage/restaurants: 7-13%. Location-specific, time-specific messages (lunch offers sent at 11:30 AM) outperform generic promotions by 2-3×.
- Healthcare/appointment: 12-18%. Appointment reminders and healthcare notifications have the highest CTR of any category, because the information is directly relevant to an immediate action the recipient needs to take.
- Travel/hospitality: 9-14%. Check-in reminders, departure alerts, and upgrade offers outperform standard promotional sends.
- B2B services: 4-7%. Lower CTR reflects the lower urgency profile of most B2B promotional SMS. Transactional (invoice sent, meeting confirmed) significantly outperforms promotional in B2B.
Opt-out rate: the warning signal
Opt-out benchmarks for SMS: below 0.5% per campaign is healthy; 0.5-1.5% is a warning signal; above 1.5% per campaign is a programme health emergency requiring immediate investigation.
Opt-out rates are rising in two categories in 2026: retail brands that increased SMS frequency post-COVID and haven't reduced it, and B2B services brands that added SMS to outbound sequences without adapting the message for the channel.
The pattern in high-opt-out programmes is consistent: the brand is using SMS for content that doesn't warrant the interruption. A general brand newsletter has no business being sent via SMS. A time-sensitive flash sale, a delivery notification, or an appointment reminder does.
SA-specific note: POPIA requires affirmative consent for SMS marketing, a pre-ticked checkbox at checkout does not constitute consent. Brands that haven't audited their SMS consent basis since July 2021 (POPIA commencement) should do so before expanding their programme. An opt-out rate above 2% is sometimes a signal that the list includes contacts who never meaningfully consented.
Delivery rate and timing
Delivery rate benchmarks: 95-99% for properly maintained lists. The 1-5% that doesn't deliver is typically accounted for by inactive numbers (prepaid SIMs that have lapsed), number changes, and carrier filtering on messages that trigger spam patterns (too many links, too many capitalised words, known spam phrases).
Send timing significantly impacts CTR. Benchmarks by send time:
- 10 AM-12 PM: Consistently highest CTR for promotional messages. Recipients are active, mobile, and in a pre-lunch window where purchase intent is higher than average.
- 6 PM-8 PM: Strong for retail promotional; weaker for B2B.
- 8 PM-10 PM: Declining CTR, rising opt-out. After-hours SMS is perceived as intrusive by a significant proportion of recipients. Avoid for promotional sends unless the recipient has explicitly opted in to late-evening notifications.
- Weekends (10 AM-1 PM): Competitive for retail and food/beverage; poor for B2B.
Using SMS benchmarks to evaluate your programme
The two metrics that indicate a healthy SMS programme are CTR relative to category benchmark and opt-out rate relative to the 0.5% threshold. If your CTR is below benchmark, investigate message content and relevance, is the message worth receiving at that moment? If your opt-out rate is above threshold, investigate frequency and consent basis first, then content.
The most reliable predictor of long-term SMS programme health is the ratio of transactional to promotional messages. Programmes that maintain a ratio of at least 40% transactional messages (delivery alerts, appointment reminders, order confirmations) to 60% promotional consistently show lower opt-out rates and higher CTR than programmes that are 100% promotional.
SMS is a high-trust channel. The trust is earned by the consistent delivery of relevant, time-appropriate information. It's spent, quickly, by the consistent delivery of generic promotional content that the recipient didn't ask for and isn't acting on. Manage the ratio.