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UEN format checker

This checks a UEN against ACRA’s three formats, in your browser. It can’t tell you whether the entity exists: search Bizfile for that.

Like 52912345A, 201828446N or T08LL1234A

Check

Valid UEN format

Kind of entity
Local company
As printed on an invoice
UEN 201828446N

A valid format isn’t proof the entity exists. Search the UEN on Bizfile or uen.gov.sg before you rely on it.

Make an invoice with your UEN

The three UEN formats

  • Businesses registered with ACRA (sole proprietorships and partnerships): 8 digits and a letter, like 52912345A.
  • Local companies: 9 digits and a letter, starting with the year of incorporation, like 201828446N.
  • Other entities (LLPs, limited partnerships, foreign companies, societies): T, S or R, 2 digits, 2 letters, 4 digits and a letter, like T08LL1234A.

What this can’t check

ACRA doesn’t publish how the last letter is worked out, so this checks the format only. A typo in the digits can still look valid. Search the UEN on Bizfile or uen.gov.sg to confirm it belongs to the business.

Last updated . This calculator is a guide, not tax advice.

Frequently asked questions

Does my UEN have to be on my invoices?

Yes. Companies must show their UEN on invoices (Companies Act s 144), and so must sole proprietorships and partnerships (Business Names Registration Regulations).

Is my UEN my GST registration number?

Usually, yes: most businesses registered for GST use their UEN as the GST registration number. Some have an M-series number from IRAS instead.

Does this look the UEN up?

No. It runs offline in your browser and only checks the format.