What Is a GST Registration Number in Singapore?

A GST registration number identifies a business or entity that is registered for Goods and Services Tax (GST) in Singapore. For many Singapore entities, the GST registration number may be the same as their Unique Entity Number (UEN), while certain registration types use a separate GST registration number or tax reference number.

GST registration is generally compulsory when a business's taxable turnover exceeds S$1 million under IRAS' retrospective or prospective registration rules. Businesses that are not required to register may also apply for voluntary GST registration if they meet the applicable conditions and are prepared to fulfil the responsibilities of a GST-registered business.

Is a GST Registration Number the Same as a UEN?

The UEN may also serve as the GST registration number. However, this is not universal. Some entities and GST registration arrangements use a separate GST registration number or tax reference number. Businesses should use the registration details confirmed by IRAS for GST invoices and reporting.

Once GST-registered, a business generally needs to:

• charge and account for GST where applicable;
• issue tax invoices containing its GST registration number where required;
• maintain proper business and accounting records; and
• file GST returns and pay GST due on time.

These requirements ensure transparency, accuracy, and compliance within Singapore’s tax framework.

How Can You Check a GST Registration Number in Singapore?

You can check whether a business is GST-registered using IRAS' GST Registered Business Search. The public service allows searches using a business name, UEN, GST registration number, or other applicable tax reference numbers.

Why Is a GST Registration Number Important?

The number helps identify a business as GST-registered and is required on tax invoices in applicable circumstances. Customers and counterparties can also use IRAS' public search to verify a business's GST-registration status. For input tax claims, businesses must satisfy the applicable IRAS requirements rather than rely on the GST number alone.

For foreign entrepreneurs and companies expanding into Singapore, understanding GST registration is a critical part of setting up compliant operations. The requirement is not automatic for all businesses, as it depends on turnover levels, business activity, and regulatory conditions.

To ensure smooth compliance, many international businesses rely on professional support. Offshore Company Corp provides Singapore Tax & Accounting support, including assistance with accounting, tax compliance, and related corporate administration. Where GST registration or GST filing support is required, the scope of service should be confirmed based on the company's circumstances.

Disclaimer

This content is for general informational purposes only and does not constitute legal, tax, or accounting advice. GST regulations, thresholds, and compliance requirements in Singapore may change over time. Businesses should consult the Inland Revenue Authority of Singapore (IRAS) or a qualified tax advisor, such as Offshore Company Corp or other licensed professionals, for advice tailored to their specific situation.