Hungary Tax ID Number (TIN) Guide 

Introduction

In Hungary, the Tax Identification Number (TIN) is a unique identifier assigned to individuals and entities for tax purposes. Possessing the correct TIN is crucial for ensuring compliance with Hungarian tax regulations for both individuals and businesses. All information provided in this guide is verified from official sources, including the National Tax and Customs Administration of Hungary (Nemzeti Adó- és Vámhivatal, NAV).​

Tax Identification Number Types 

Hungary utilizes two primary types of TINs:​ 

• Adóazonosító jel: This is the Tax Identification Number for individuals.​ 

• Adószám: This is the Tax Number for businesses and legal entities.​ 

The Adóazonosító jel is assigned to individuals for personal taxation purposes, while the Adószám is designated for businesses and other legal entities engaged in economic activities.

TIN Format and Structure 

• Adóazonosító jel (Individuals): 

• Format: 10 digits​

• Structure: 

• The first nine digits are unique identifiers. 

• The tenth digit is a checksum for validation purposes. 

• Adószám (Businesses and Legal Entities): 

• Format: 11 digits, typically presented as xxxxxxxx-y-zz​ 

• Structure: 

• xxxxxxxx: The first eight digits represent the unique identifier of the entity. 

• y: The ninth digit indicates the VAT status code. 

• zz: The last two digits denote the code of the competent tax office. 

For intra-community transactions within the EU, the VAT number is prefixed with the country code ‘HU’, resulting in a format like HU12345678.

Issuing Authority and Registration Process 

The National Tax and Customs Administration of Hungary (NAV) is the official body responsible for issuing TINs.  

Registration Process: 

• For Individuals: 

1. Obtain the T34 Form: Individuals without a tax identification code who intend to pursue an activity that incurs tax liability must complete the T34 data sheet.

2. Submit the Form: The completed form should be submitted to the competent tax authority office.​ 

3. Receive TIN: Upon processing, the individual will receive their Adóazonosító jel.​

• For Businesses and Legal Entities: 

1. Company Registration: During the incorporation process, businesses must apply for registration with the Court of Registration.​

2. Tax Registration: Concurrently, businesses fulfill their obligation to register with the tax authority. ​NAV 

3. Receive Adószám: NAV assigns the Adószám upon successful registration.​

TIN Verification and Lookup 

To verify the validity of a Hungarian TIN:​

• Domestic Verification: NAV provides tools to check the validity of domestic tax numbers.

• EU VAT Number Verification: For intra-community VAT numbers, the European Commission offers the VIES VAT number validation system.  

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TIN and VAT Number Connection 

In Hungary, the Adószám serves a dual purpose:​

• Domestic Transactions: The 11-digit Adószám is used.​ 

• Intra-EU Transactions: The VAT number is the Adószám prefixed with ‘HU’, formatted as HU12345678. ​

This structure aligns with EU regulations for VAT identification.​ 

Importance of Accurate TIN Validation 

Ensuring the accuracy of TINs is vital for:​ 

• Compliance: Accurate TINs are essential for adhering to tax laws and avoiding legal repercussions.​ 

• Business Transactions: Correct TINs facilitate smooth invoicing and financial operations.​ 

• International Trade: Validated TINs are crucial for seamless cross-border transactions within the EU.​ 

Incorrect TINs can lead to penalties, delays, and complications in both domestic and international business activities.​ 

Why Accurate TIN Validation Matters

Ensuring the accuracy of your TIN is critical for both businesses and individuals in Hungary. 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 Hungarian National Tax and Customs Administration (NAV) official website or the TaxDo real-time global tax ID verification platform ensures accurate Tax ID validation, error reduction, and full compliance with Hungarian tax laws.

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