Accounting and Tax

Your Guide To Tax Identification Number (TIN) in Singapore

21 December 2023
Grof Writer
6 Minutes Read
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As an entrepreneur or a small business owner in Singapore, understanding the ins and outs of the Tax Identification Number (TIN) is crucial. Basically, TIN is a vital component of the taxation system in Singapore, and being well-informed about it can help you navigate the country's tax landscape with ease. 


In this comprehensive guide, we'll explore more on what the Singapore Tax Identification Number is, its types, its purpose, how to check TIN for newly incorporated companies, and how to apply for one.  


Getting To Know Singapore Tax Identification Number 

So, what exactly is a Tax Identification Number? The Tax Identification Number, or TIN, is a unique identifier assigned by the Inland Revenue Authority of Singapore (IRAS) to individuals, businesses, and entities for tax purposes. It serves as a crucial reference for tax-related matters, and it is often required for various financial transactions. 


In Singapore, TINs are pivotal in ensuring the smooth operation of the taxation system. They are generally a critical component of the government’s efforts to maintain tax transparency, streamline revenue collection, and facilitate economic growth. 


Types of Tax Identification Numbers in Singapore 

Obtaining a Tax Identification Number (TIN) in Singapore:  

  • For Singapore Citizens and Permanent Residents: Singapore citizens and permanent residents are assigned a TIN that is the same as their National Registration Identity Card (NRIC) number. This TIN is automatically allocated at birth or when permanent residency is granted, without the need for separate tax registration.  
  • Foreign Individuals: Expatriates or foreign residents in Singapore usually have an employment or dependent pass. With the issuance of these passes, they receive a Foreign Identification Number (FIN), which serves as their TIN for fulfilling tax and financial responsibilities in Singapore. 
  • For Businesses: Registration of New Businesses: A newly established business in Singapore is given a Unique Entity Number (UEN) upon registration. The UEN serves a dual purpose, functioning as the company’s TIN for all tax-related activities. Business owners and relevant parties should be familiar with their UEN, as it's vital for various business and financial procedures.  
  • Registration for Existing Foreign Businesses: Foreign business entities planning to operate in Singapore must register to obtain a UEN. This UEN then acts as their official TIN in Singapore following registration. 



The Purpose of TIN 

Now that we have identified the different types of Tax Identification Numbers in Singapore, let's explore their purposes. 

  • Filing Taxes: TINs are primarily used for filing taxes. Individuals and businesses report their income to the IRAS using their respective TINs. Accurate and timely tax filing is especially essential in staying compliant with Singapore's tax regulations. Failure to report income accurately can lead to penalties and legal consequences. 
  • GST Registration: For businesses, a UEN is required for registration of GST, a value-added tax in Singapore. This registration allows businesses to collect and remit GST on their sales. Proper GST registration is necessary in order to avoid issues with the tax authorities. 
  • Banking and Financial Transactions: Financial institutions often require your TIN for opening bank accounts, obtaining loans, or conducting other financial transactions. Having a TIN is vital for businesses to engage in financial activities smoothly. Without a TIN, banks and financial institutions may limit your access to financial services. 
  • Employment: When employed in Singapore, your employer will use your TIN for income tax reporting and deductions from your salary. It's also important to ensure that your TIN is correctly provided to your employer to prevent discrepancies in tax deductions and reporting. 


How To Apply For A Tax Identification Number in Singapore? 

Singapore Citizens and Permanent Residents: 

As a Singaporean citizen or permanent resident, you're automatically assigned a Tax Identification Number (TIN) that matches your National Registration Identity Card (NRIC) number. There's no need to apply separately for a TIN in this scenario. 


Foreigners with a Valid Work Pass: 

For foreigners with a valid work pass, obtaining a TIN involves registering for a Unique Account with the IRAS. This can be done via their online portal or by using a SingPass account. During registration, you'll need to provide your Foreign Identification Number (FIN). 


After submitting your application, the IRAS will review your details. Generally, expect to receive your TIN, or Tax Reference Number, within about 5 working days from submission. 


Business Registration Process: 

If you're setting up a new business in Singapore and don't yet have a Unique Entity Number (UEN), the first step is to register your business with the Accounting and Corporate Regulatory Authority (ACRA). 

Incorporating your company is a crucial step in establishing your business, and it's often advisable to seek legal guidance for this process. Key steps include: 

  • Deciding on your business entity type. 
  • Registering your company with the ACRA. 
  • Choosing between a standard UEN or a special one. 
  • Checking your UEN upon successful registration. 


Following the successful completion of your company's registration, the ACRA will issue a Certificate of Incorporation. Your UEN, typically the same as your ACRA Registration Number, will be clearly indicated on this certificate. Remember, your UEN is a permanent identifier and does not require renewal. 


Need help with the incorporation process in Singapore? Grof is here to assist. We prioritise professional, tailored support to streamline your incorporation journey. Feel free to contact us for more information. 


Additional Tips for Accurate Tax Filing  

Stay Updated with Changes: Life is a dynamic journey with various shifts like moving to a new address, changing names after marriage, or evolving business activities. It's vital to inform IRAS about these changes as soon as they happen. Timely updates to your records help maintain smooth communication and transactions. 


Keep Precise Records: Accurate documentation is essential for financial compliance. It's important to carefully track all your income, deductions, and other relevant financial data. These records are crucial during tax season, helping you claim legitimate deductions and pay the correct amount. 


Monitor Your Tax Responsibilities: Your TIN offers easy access to your online tax account, a crucial tool for monitoring your tax status. Use your tax account to check for any due payments, confirm the correctness of tax assessments, or keep an eye on potential refunds. Regularly reviewing your tax account ensures you stay informed and meet all compliance requirements. 


Stay Informed on Tax Regulations: Tax laws and financial rules are constantly changing. Keeping up-to-date with these changes helps you stay compliant and take full advantage of any available benefits or deductions. Staying educated on tax codes and regulations is key to managing your financial responsibilities effectively. 




To summarise, in Singapore, having a Tax Identification Number is essential for individuals and businesses alike. It plays an important role in taxation, financial transactions, and ensuring legal compliance. Whether you're a seasoned entrepreneur or just starting your business journey, understanding the nuances of TINs is vital. 


To streamline your business operations and ensure proper accounting and tax compliance, consider seeking professional assistance. At Grof Accounting, we offer expert accounting services to help you manage your finances efficiently. If you're planning to incorporate your business in Singapore, our team can also assist you through the incorporation process


By staying informed about the Tax Identification Number and other crucial aspects of doing business in Singapore, you'll be better equipped to navigate the country's dynamic business environment and focus on what you do best – growing your business. 


Remember, a well-informed business owner is a successful business owner. Stay updated, stay compliant, and keep reaching for your entrepreneurial dreams in the vibrant landscape of Singapore! 

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