Luxembourg Tax ID Number (TIN) Guide

A Tax Identification Number (TIN) is a unique identifier used by tax authorities to track individuals, businesses, and entities for taxation purposes. In Luxembourg, having the correct TIN is essential for complying with the country’s tax regulations. It is crucial for both individuals and businesses to ensure they have the proper TIN in place to avoid potential issues with tax filings and financial transactions. The information presented in this guide has been 100% verified from official sources, including Luxembourg’s tax authority website, ensuring the highest accuracy and reliability.

Tax Identification Number Types

In Luxembourg, there are two main types of Tax Identification Numbers (TINs) used for tax-related purposes: the National Registration Number (Matricule) and the VAT number.

1. National Registration Number (Matricule)
   • Applicable to: Individuals, residents, and employees.
   • Description: The National Registration Number, also known as “Matricule,” is used for identification purposes within the national tax system. It is assigned to all individuals (including foreign nationals) and is required for individuals working in Luxembourg.
2. VAT Number
   • Applicable to: Businesses and legal entities.
   • Description: The VAT number is assigned to entities registered for Value Added Tax (VAT). Businesses must have a VAT number if they are subject to VAT obligations in Luxembourg, particularly for invoicing and international transactions.

Official Names and Usage:

• National Registration Number (Matricule) for individuals.
• VAT Number for businesses and entities conducting taxable transactions.

These are the primary TIN types in Luxembourg, directly referenced from official Luxembourg government tax authority sources.

TIN Format and Structure

1. National Registration Number (Matricule):

• Format: The Matricule number is a unique 13-digit identifier.
• Structure: The format is structured as follows: XX-XXXXXXX-XX.
  • The first part represents a general identifier for the individual.
  • The middle part contains a unique number to identify the individual.
  • The last part contains a checksum for validation.

2. VAT Number:

• Format: The Luxembourg VAT number follows the structure: LUXXXXXXXXX.
  • “LU” is the country code for Luxembourg.
  • The following digits (up to 9) are unique to the business entity.

Both the Matricule and VAT number formats comply with the official tax authority guidelines, ensuring proper recognition by the Luxembourg tax administration.

Issuing Authority and Registration Process

Issuing Authority:

• The official tax authority responsible for issuing TINs in Luxembourg is the Administration des Contributions Directes (ACD), the Luxembourg Tax Administration.
• Website: www.impotsdirects.public.lu

TIN Registration Process:

1. Eligibility Requirements:
   • Individuals: Any person residing or working in Luxembourg must register with the tax office.
   • Businesses: Any business or legal entity conducting taxable activities in Luxembourg must apply for a VAT number.
2. Documents Required:
   • For individuals: Passport or national identity card, proof of address, and employment details.
   • For businesses: Articles of incorporation, proof of business activities, identification details of directors, and proof of address.
3. Application Process:
   • For Individuals: Individuals can register for a Matricule at the local commune or online via the official tax authority portal.
   • For Businesses: Businesses can register online for VAT registration. Alternatively, registration can be completed at the ACD office.
4. Fees: There are no registration fees for obtaining a TIN (Matricule or VAT number) in Luxembourg.

The official tax authority website offers detailed guides and forms for both individual and business registration.

TIN Verification and Lookup

To verify a TIN in Luxembourg, individuals and businesses can use the official verification tool provided by the Luxembourg Tax Administration. This tool allows users to confirm the validity of a National Registration Number (Matricule) or VAT number.

• Official Online TIN Verification Tool:
  • For VAT Numbers: Businesses can use the EU VIES VAT Number Validation system to verify Luxembourg VAT numbers in real-time.
  • For Matricule Numbers: Verification of Matricule numbers can be done directly through the Luxembourg Tax Administration Portal.

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TIN and VAT Number Connection

In Luxembourg, the VAT number serves as a tax identification number for businesses. It is used for all VAT-related activities, including cross-border transactions and VAT filings. The VAT number follows the specific format LUXXXXXXXXX, as mentioned earlier.

For individuals, the National Registration Number (Matricule) does not double as a VAT number, as it is primarily used for income tax and social security purposes.

Why Accurate TIN Validation Matters 

Ensuring the accuracy of your TIN is critical for both businesses and individuals in Luxembourg. 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 Luxembourg Tax Administration Portal or TaxDo real-time global tax ID verification platform ensures accurate Tax ID validation, error reduction, and full compliance with Luxembourg tax laws. 

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While the Luxembourg Tax Administration Portal offers a basic PIN checker, TaxDo takes Luxembourg 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. 

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