Taiwan Tax ID Number (TIN) Guide

A Tax Identification Number (TIN) in Taiwan is a critical tool used by the government to track the tax obligations of individuals, businesses, and other entities. It ensures that tax filings are correctly processed, and helps authorities maintain an organized record of tax compliance. Having the correct TIN is essential to avoid penalties, delays, and ensure smooth business operations within Taiwan. This guide presents verified and accurate information sourced directly from Taiwan’s official tax authority websites. 

1. Tax Identification Number Types 

In Taiwan, there are two main types of TINs, each designated for different purposes: 

1. National Tax Identification Number (NTIN): This is used for individuals and is primarily linked to income tax filings. 

2. Business Registration Number (BRN): This is used by businesses, including corporations, partnerships, and other legal entities. 

Each TIN serves a distinct purpose and is issued by the National Taxation Bureau of Taiwan (NTB). 

2. TIN Format and Structure 

National Tax Identification Number (NTIN) 

• Format: The NTIN for individuals is a 10-digit number. 

• Structure: The first section of the TIN represents the individual’s category, followed by a unique identifier and checksum digits. 

• Example: A123456789. 

• The “A” at the beginning denotes that this number is a tax number for an individual, followed by 9 digits that are unique to each individual. 

Business Registration Number (BRN) 

• Format: The BRN is composed of a 9-digit number. 

• Structure: The BRN is issued to legal entities and businesses, starting with a letter indicating the type of entity, followed by 8 digits. 

• Example: B123456789. 

• The “B” indicates a business registration number, followed by the unique 8 digits allocated to the business. 

3. Issuing Authority and Registration Process 

The National Taxation Bureau of Taiwan (NTB) is the official authority responsible for issuing TINs. 

• Official Name of Issuing Authority: National Taxation Bureau of Taiwan (NTB) 

• Official Website: www.ntb.gov.tw 

TIN Registration Process 

For Individuals (NTIN): 

1. Eligibility: All Taiwanese citizens and permanent residents are eligible for the NTIN. 

2. Documents Required: The applicant must provide proof of identity, such as a Taiwanese National ID card for citizens or a valid passport for foreign residents. 

3. Application Process: Taiwanese citizens automatically receive their NTIN upon registering for their National ID card. Foreign nationals who reside in Taiwan for an extended period must apply through the NTB. 

4. Fees: There is no charge for obtaining the NTIN. 

For Businesses (BRN): 

1. Eligibility: Any business entity operating in Taiwan, including corporations, partnerships, and other registered entities. 

2. Documents Required: Applicants must submit company registration documents, such as the company’s Articles of Incorporation, identification documents of directors, and proof of the business address. 

3. Application Process: Businesses must submit their registration to the Ministry of Economic Affairs (MOEA), and once registered, the NTB will issue a BRN. This process can be completed online through the NTB’s official portal. 

4. Fees: Business registration typically incurs a nominal fee, which varies based on the type of business entity. 

For full details on the process and to submit applications online, visit the official NTB website. 

4. TIN Verification and Lookup 

Individuals and businesses can verify their TINs via the official portal provided by the National Taxation Bureau of Taiwan. Verification tools are available for both NTINs and BRNs, ensuring that the tax identification numbers are correctly issued and valid. 

• Online TIN Verification Tool: The NTB offers an online service for verifying TINs for both individuals and businesses. 

• Verification Process: To verify a TIN, you will need the TIN number (either NTIN or BRN), and you can check it through the official NTB website or their online verification platform. 

Or Instantly Verify Tax IDs in Taiwan with TaxDo Real-Time TIN Validation Platform 

TaxDo offers a compliant, automated, and globally trusted solution for TIN verification—not just in Taiwan, but across 135+ jurisdictions. Unlike other solutions, TaxDo validates tax IDs instantly and securely using only official government sources. 

What Makes TaxDo Different? 

• Real-time TIN verification for Taiwan and 135+ countries  

• Seamless API integration into your ERP, CRM, or onboarding system 

• Powerful dashboard to manage and track tax ID validations globally 

• Fully compliant and official-source-based results ONLY 

Whether you’re conducting due diligence, onboarding clients, granting tax exemption, or managing vendor compliance in Taiwan, TaxDo helps you avoid risks, delays, and penalties with effortless global Tax ID validation. 

📩 Get started today or schedule a free demo to see how TaxDo simplifies tax compliance. 

5. TIN and VAT Number Connection 

In Taiwan, the Business Registration Number (BRN) also serves as the VAT Number for businesses registered for VAT (Value Added Tax). Therefore, the TIN issued to a business is the same identifier used for VAT purposes. 

• VAT Number Format: The VAT number in Taiwan follows the format of the BRN, which is a 9-digit number, starting with the letter “B”. 

• Example: B123456789 (This would also serve as the VAT registration number for the business). 

Businesses need to ensure that their BRN is correctly registered with the National Taxation Bureau to be in compliance with VAT regulations. 

6. Why Accurate TIN Validation Matters 

Ensuring the accuracy of your TIN is critical for both businesses and individuals in Taiwan. An incorrect or unverified TIN can lead to serious complications such as: 

• Delays in tax processing 

• Rejection of tax exemption claims 

• Fines and penalties for non-compliance 

• Rejection of e-invoicing submissions 

• Onboarding unqualified suppliers or customers 

• Data quality issues across finance and compliance systems 

Using the National Taxation Bureau of Taiwan or TaxDo real-time global tax ID verification platform ensures accurate Tax ID validation, error reduction, and full compliance with Taiwan tax laws. 

7. Stay Compliant with TaxDo 

While the National Taxation Bureau of Taiwan offers a basic PIN checker, TaxDo takes Taiwan TIN validation to the next level with real-time results, periodic revalidation for ongoing compliance, and seamless integration into your systems. 

With TaxDo, you can automate Tax ID validation, monitor changes, and ensure continuous compliance, all from a single, user-friendly dashboard or through API connectivity. 

TaxDo is trusted by leading enterprises, platforms, and compliance teams worldwide. Try it now and eliminate the risks of Tax ID errors in Taiwan and beyond.