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How to verify UEN in Singapore?

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UEN check on UEN website​

UEN number search option is available for free on the official Singapore UEN website. You can access the UEN search here. You can search on the UEN website by the UEN number, name of the company, or the previous entity registration number.

To verify a Singapore UEN:

  1. Go to the Singapore UEN portal.
  2. Enter the UEN (e.g. 53342345K), company name, or previous registration number.
  3. Submit — results appear immediately.

Example: 53342345K

UEN search on UEN website
UEN search on UEN website

A successful verification of the UEN on the UEN lookup tool will return the following details:

  • UEN
  • Entity Type
  • UEN Issuance Agency
  • Address
  • Entity Name
  • UEN Status
  • Previous Entity Registration No
Successful UEN Verification on UEN website
Successful UEN Verification

UEN check on ACRA Register​

UEN number search option is available for free on the ACRA Register on the Bizfile website. You can access the UEN search here. You can search by UEN number or company name, narrow results by entity type, and purchase detailed information such as business profiles, company documents, certificates, and extracts.

UEN search on ACRA Register
UEN search on ACRA Register

A successful verification of the UEN on the ACRA Register will return the following details:

  • Name
  • UEN
  • Status
  • Address
  • Industry (primary activity 5-digit SSIC description)
Successful UEN Verification on ACRA Register
Successful UEN Verification
Incorporation certificate
Singapore Incorporation certificate

For more details on Singapore tax identifiers, see our Singapore Tax ID Guide.

Frequently Asked Questions​

What is the format of a Singapore UEN, and how does it vary by entity type?​

Singapore UEN format varies by entity type: Businesses (sole proprietorships/partnerships): 8 digits + 1 letter (e.g. 53342345K); Local companies (registered from 2009): 4-digit year + 5 digits + 1 letter (e.g. 200912345A); Government and other agencies: T/S/R prefix + specific pattern. Entities registered before 2009 retain their old ROC/ROB numbers as "Previous Entity Registration No". [1]

What does "Previous Entity Registration No" mean in the UEN portal results?​

Before Singapore's UEN system was introduced in 2009, entities had separate numbers: ROC (companies), ROB (businesses), ROS (societies). When UENs were introduced, old numbers were retained as "Previous Entity Registration No" for backward compatibility. To find the current UEN for a pre-2009 entity, search by the old ROC/ROB number — both the old number and the current UEN identify the same legal entity. [1]

What is the difference between a Singapore UEN and a GST registration number?​

The UEN is a universal identifier for all registered entities regardless of GST status. The GST registration number is issued by IRAS specifically to GST-registered businesses (mandatory above SGD 1 million annual taxable turnover). A business has a UEN from registration but only gets a GST number after registering for GST. Tax invoices require the GST number (not just the UEN). Verify GST registration separately via IRAS mytax.iras.gov.sg. [1] [2]

My Singapore supplier's UEN shows "Cancelled" status — can I still transact with them?​

No. "Cancelled" means the entity has been deregistered from ACRA — it is no longer a legal entity in Singapore and cannot issue valid invoices or enter binding contracts. For companies, the equivalent status is "Struck Off" or "Liquidated". Any tax invoice from a cancelled-UEN entity after the cancellation date is invalid. Cease transacting and request evidence of their current legal status. [1]

What does the "UEN Issuance Agency" field indicate?​

The field identifies which Singapore government agency issued the UEN. Common issuance agencies: ACRA — companies, businesses, LLPs (most commercial entities); ROS (Registry of Societies) — associations; MCCY — charities; MAS — certain licensed financial entities. The issuance agency does not affect the entity's legal status for contracting purposes but indicates the governing regulatory body. [1]

Can I verify a Singapore UEN programmatically using an API?​

Yes. ACRA provides a free public API via Singapore's data.gov.sg platform (collections/2301) — RESTful, returns JSON with UEN, entity name, registration date, status, and primary activity. No authentication required for basic queries. ACRA's Bizfile portal offers a paid API for detailed profiles (directors, shareholders, financials). For GST validation, use the IRAS GST-registered businesses dataset on data.gov.sg. [1]

What is the current Singapore GST rate and registration threshold?​

Singapore's GST rate was raised from 8% to 9% on 1 January 2024 (second step of the phased increase from 7%). The mandatory registration threshold remains SGD 1 million annual taxable turnover. For overseas digital service providers supplying B2C in Singapore: mandatory registration if Singapore supply exceeds SGD 100,000 and global turnover exceeds SGD 1 million (since 2020). Low-value goods (under SGD 400) imported online are also subject to GST since 1 January 2023. [1]

How Lookuptax can help you in UEN validation?

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