What is a UEN (Unique Entity Number) in Singapore? (2026)
The UEN is the single, unique identification number issued to every registered entity in Singapore.
What does a UEN look like?
A UEN is a unique alphanumeric identifier. For companies incorporated with ACRA it is typically based on the year of incorporation plus a running number and a check letter (for example, a 9- or 10-character code). Businesses registered before the UEN system may retain their former registration number as their UEN.
What is the UEN used for?
The UEN replaces the multiple identification numbers an entity previously needed across government agencies. It is used when filing with ACRA and IRAS, applying for licences, opening corporate bank accounts, and transacting with other government services. It is the entity’s single, permanent identity for its lifetime.
Sources
This article is general information for Singapore corporate service providers, not legal or professional advice. Verify against the primary sources above and your own professional judgement.