What Is a Unique Entity Number (UEN) in Singapore & How to Find It

Every registered business in Singapore holds a Unique Entity Number (UEN), a standard identifier used across all government agencies. Think of it as your company's official registration ID, the way a National Registration Identity Card (NRIC) or FIN identifies a person.

You need the UEN any time your business deals with the government: filing corporate tax returns, applying for licences, submitting employee CPF contributions, or registering for PayNow. Without it, a company cannot complete most essential transactions with public agencies.

This guide covers what a UEN is, which agency issues it, the formats used by different business structures, the benefits it unlocks, and the fastest ways to find or check any company's UEN.

What Is a Unique Entity Number (UEN) in Singapore?

A UEN is the standard identification number for registered business entities in Singapore. One number, recognised by every government body, replaces the separate reference numbers each agency used before 2009.

The number stays with your entity for life. It does not expire, and it does not renew. A company keeps the same UEN through a name change, a change of directors, or a move to a new registered address.

Two things a UEN is not. It is not a tax number, though IRAS uses it as one for corporate income tax. And it is not proof that a business is trading, since a struck-off company keeps its UEN on the register.

Who Issues the UEN in Singapore?

Most UENs come from ACRA. Entities that fall outside the Companies Act receive theirs from another issuance agency, depending on what they do.

The rule is simple: whichever government authority registers your entity also issues your UEN. You never apply to a second agency for a second number.

Who Needs a UEN?

Any registered entity in Singapore that deals with government authorities needs a UEN. That includes:

• Singapore companies, such as private limited companies (Pte Ltd)
• Sole proprietorship businesses
• Partnerships, including Limited Partnerships (LPs) and Limited Liability Partnerships (LLPs)
• Foreign companies operating through branches or representative offices
• Registered societies
• Charities and non-profit organisations
• Trade unions

There are some exemptions. Individuals do not need a UEN. A business trading entirely under the owner's full name as printed on their NRIC is exempt, as is a partnership operating only under the partners' full NRIC names. These businesses skip registration altogether, so no number gets issued.

A foreign company with no registered presence here holds no Singapore UEN. Once it registers a branch, a subsidiary, or a representative office, that local entity receives its own UEN. The parent company's foreign registration number carries no weight with Singapore agencies.

What Is a UEN Used For?

Entities registered in Singapore quote their UEN whenever they transact with government departments:

• Filing corporate income tax returns with IRAS
• GST registration and GST returns
• Applying for licences, such as real estate, financial, or F&B licences
• Applying for permits, including import and export permits
• Submitting CPF contributions for employees
• Registering for PayNow Corporate, which links your UEN to a bank account so you send and receive SGD instantly, with no account number needed. The Association of Banks in Singapore administers PayNow.
• Accessing Corppass, Singapore's corporate digital identity system
• Applying for government grants and completing annual compliance filings

Benefits of a UEN

The UEN does more than satisfy a registration requirement. Four benefits stand out.

1. One identifier, every agency. Before 2009, a business juggled a different reference number for ACRA, IRAS, and CPF. The UEN collapsed all of them into one. You quote a single number and each government body pulls up the same record.
2. Faster transactions. PayNow Corporate turns your UEN into a payment address. Customers pay you by typing your UEN, with no bank or account number to mistype. Tax filing, licence applications, and CPF submissions all pre-fill from the same identifier, which cuts the paperwork and the data entry errors.
3. Public credibility. Anyone can verify your UEN for free on Bizfile in seconds. Suppliers, investors, and enterprise customers run that check before signing. A live UEN with a clean filing history answers the first question every counterparty asks.
4. Access to the ecosystem. Grants, tenders, digital services, and most B2B platforms in the market ask for a UEN at sign-up. Without one, a business cannot reach that side of the economy.

What Does a UEN Look Like? The UEN Format

A UEN runs 9 to 10 alphanumeric characters. The exact format depends on your entity type and the agency that issued it.

How to Read a UEN

Take T26LL1234X apart and the structure becomes clear:

• T: The prefix. A UEN that starts with T or S belongs to a specific entity type, or to an entity registered through an agency other than ACRA. Sole proprietorships and local companies use sequential numbering with no prefix.
• 26: The year of registration, 2026 in this case.
• LL: The entity code. Common codes include LL for LLPs, LP for limited partnerships, SS for societies, TU for trade unions, CC for charities, and RF for representative offices.
• 1234: The sequential number issued that year.
• X: The check alphabet. This final letter comes from a formula applied to the digits before it. Systems use it to catch a mistyped UEN before the transaction goes through.

A local company registered in 2026 reads differently: 202612345X gives the full four-digit year, then five sequential digits, then the check alphabet. The year tells you how old a company is at a glance, which is a quick sanity check when a supplier claims a decade of history.

What Is a Special UEN (SUN)?

A Special UEN (SUN) is a personalised UEN you can request during registration instead of the number the system assigns. A standard UEN is free and generated automatically. A SUN lets you pick something memorable or auspicious.

Businesses choose a SUN to:

• Build brand recognition with a number people remember
• Match cultural preferences, such as combinations containing 8, the digit associated with prosperity
• Stand apart from competitors

Once you select a SUN during registration, pay within 30 minutes. Miss that window and the number returns to the available pool for someone else.

Worth weighing before you spend: a SUN changes nothing about your legal standing, your tax treatment, or your compliance obligations. It buys memorability, and nothing else.

How to Apply for a UEN in Singapore: Step by Step

Your UEN arrives automatically when you register a business here. The choice you make during registration is whether to take the free number or pay for a SUN.

Step 1: Register Your Business With ACRA

• Reserve your entity name through the Bizfile name application page.
• Prepare the required documents: identification for shareholders and directors, the company constitution, and proof of address.
• Submit your incorporation application online through the Bizfile portal.

Sole proprietorships and partnerships need a Singapore resident owner, or a local representative if the owner lives abroad. A company needs at least one shareholder (individual or corporate), one Singapore-resident director or a nominee director, a local company secretary, and a registered office address.

Step 2: Choose a UEN or a Special UEN

During registration, the system asks whether you want a Special UEN.

Answer no, and it generates a standard UEN for free. You cannot customise it.

Answer yes, and you browse the list of available numbers or type up to five digits in the search bar to find combinations containing them. The fee runs SGD 1,000 to 3,000 by tier. Complete payment within 30 minutes, or the number goes back into the pool.

Step 3: Receive Your UEN

Once ACRA approves your registration, your business receives a free Business Profile that displays the UEN in its first few lines.

The Business Profile is the official record of your registered entity. Download it free within 60 days of notification in your Bizfile inbox. Miss that window and a copy costs SGD 5.50 from Bizfile. Save the PDF: banks, landlords, and payment platforms ask for it during onboarding.

How to Find and Check a Company's UEN

The fastest route is Bizfile's Entity Search at bizfile.gov.sg. It is free, public, and needs no login.

Step 1: Open the Bizfile homepage and find the entity search bar.

Step 2: Enter the business name, or the UEN if you want to verify one you already hold.

Step 3: Read the result. It shows the official entity name, the UEN, the registration date, the entity type, and the current status.

Step 4: For the full picture, buy the Business Profile for SGD 5.50. It adds directors, shareholders, share capital, and the registered address.

How to Check UEN Status

The status field matters more than most people realise. It tells you whether the entity in front of you can legally trade.

Run this check before you sign a supplier contract or extend credit. A five-second search tells you what a reference letter cannot.

Two Other Places to Search

• IRAS GST Directory. To confirm whether a company is GST-registered, and check its UEN along the way, use the IRAS GST Listing Search. Useful when verifying suppliers with revenue above the registration threshold. Only GST-registered entities appear here.
• CPF Registered Employer Search. The CPF Board lets you search employers by UEN. This confirms CPF registration status rather than serving as a general lookup. For most purposes, Bizfile stays the fastest and most complete source.

When Does a UEN Change?

Almost never. A few situations do trigger a new number.

1. Converting your structure. A sole proprietorship that incorporates as a Pte Ltd does not carry its UEN across. The new company receives a fresh number, and the old registration closes. Update your bank, your customers, and your PayNow registration when this happens.
2. Amalgamation. When two companies merge, the surviving entity keeps its own UEN and the other one closes.
3. Striking off. A struck-off company keeps its UEN on the historical register, though the number no longer supports trading.

A name change, a new director, a new registered address, or a move to new business activities all leave your UEN untouched.

UEN vs Other Singapore Identifiers

Founders mix these up during their first year. Here is the difference.

For most companies, the GST registration number and the UEN are the same string. That surprises founders arriving from markets such as Malaysia or Hong Kong, where the tax number and the company registration number sit apart.