Compliance · Singapore
SMS Compliance in Singapore
A practical overview of the rules that affect SMS messaging and marketing in Singapore, with a checklist before you launch.
Key Rules for SMS in Singapore
Organisations sending SMS with alphanumeric sender IDs in Singapore must register with the Singapore SMS Sender ID Registry (SSIR) run under IMDA; messages from unregistered IDs are flagged as likely scams. Marketing messages also have to follow the Do Not Call provisions of the PDPA.
Several Asian markets require sender ID registration (for example Singapore's SMS Sender ID Registry) and have data protection laws with marketing consent rules, such as Singapore's PDPA and Malaysia's PDPA.
Data Protection
Websites collecting personal data must comply with the PDPA, including notification, consent, purpose limitation and protection obligations.
Keep a record of how each contact was collected, what they agreed to and when, and make it easy for them to withdraw consent.
Practical Checklist
- Collect and record consent (or confirm an existing customer relationship) before sending, with the date and source.
- Use a registered sender ID or number that recipients can recognise as your business.
- Identify your business in every message and keep promotional and service messages separate.
- Give a simple way to opt out of marketing and process opt-outs quickly across all your systems.
- Send in the recipient's local daytime hours and keep frequency reasonable.
Contact data
Format numbers in international E.164 format with the +65 country code, remove duplicates and invalid numbers, and keep consent records linked to each number.
Timing and Language
Singapore follows the Asia/Singapore time zone (UTC+08:00 in October 2026). Schedule SMS campaigns for the recipient's local daytime hours, avoid public holidays and religious observances that matter to your audience, and convert send times from IST before scheduling.
In Singapore, customers commonly use English, Mandarin, Malay and Tamil. Messages in the customer's preferred language usually perform better, but check how local-language text affects character counts (for SMS) and template approval (for WhatsApp).
Digital Habits and Channels in Singapore
Singapore has near-universal smartphone use, and WhatsApp is the main messaging app for customers and businesses. Organisations sending SMS with alphanumeric sender IDs must register them with the Singapore SMS Sender ID Registry (SSIR) run by IMDA; unregistered sender IDs are labelled 'Likely-SCAM'. The national Do Not Call Registry must be checked before marketing calls and texts.
PayNow, cards and digital wallets dominate payments. Chinese New Year, Hari Raya, Deepavali, the Great Singapore Sale and the 11.11 sale are key periods.
Singapore's economy is a regional hub for finance, shipping, trade, technology and biomedical manufacturing, with many Asia-Pacific headquarters. GST is 9% since January 2024. The Personal Data Protection Act requires consent for marketing, and the Do Not Call provisions mean marketing calls and texts to Singapore numbers must be checked against the registry unless there is clear consent. English is the business language, and Mandarin, Malay and Tamil are also official.
Regulators, Registers and Practical Rules in Singapore
Singapore's PDPC runs the Do Not Call Registry, and the SMS Sender ID Registry is mandatory.
Unregistered sender IDs are labelled "Likely-SCAM".
Singapore's PDPA includes Do Not Call provisions: marketing calls and SMS to Singapore numbers must be checked against the DNC Registry unless the person gave clear consent. Since January 2023, all organisations sending SMS with alphanumeric sender IDs must register them with the SMS Sender ID Registry run by IMDA, and messages from unregistered IDs are marked "Likely-SCAM". Singtel, StarHub, M1 and SIMBA are the operators.
General guidance, not legal advice. Check current rules with the regulator or a local adviser before launch.
Advertising Alongside Messaging
Advertising should follow the Singapore Code of Advertising Practice administered by ASAS, including guidelines on interactive and influencer marketing.
This guide is general information, not legal advice, and reflects our understanding as of October 2026. Rules change, so we check current requirements for Singapore before every launch.
Planning SMS campaigns for Singapore?
We check the rules, set up sender requirements and run compliant campaigns.
SMS in Singapore: FAQs
Do I need consent to send marketing SMS messages in Singapore?
In most cases, yes, or at least an existing customer relationship and a clear opt-out. Organisations sending SMS with alphanumeric sender IDs in Singapore must register with the Singapore SMS Sender ID Registry (SSIR) run under IMDA; messages from unregistered IDs are flagged as likely scams.
Do I need a registered sender ID for Singapore?
Sender ID rules vary by country and operator. Some countries require pre-registration of alphanumeric sender IDs, others only allow numeric senders. We confirm the current requirement before launch.
Can DND Teams run SMS campaigns to Singapore?
Yes. We are based in Bhopal, India, and run campaigns for international markets remotely, after checking the current rules, sender requirements and coverage for Singapore.
Is this legal advice?
No. This guide is general information to help you plan. Regulations change and their application depends on your business, so take local legal advice for significant campaigns.
Related Guides and Services
Other channels in Singapore
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