# Norway Tax ID Number (TIN) Guide

> Learn how Norway assigns and uses Tax Identification Numbers (TINs) like Fødselsnummer, D-nummer, and Organisasjonsnummer. Validate TINs globally with TaxDo's real-time tax ID verification platform.

Source: https://taxdo.com/resources/global-tax-id-validation-guide/norway

Last updated: 2025-06-30

## Introduction

In Norway, Tax Identification Numbers (TINs) are essential for identifying individuals and entities in tax-related matters. They are crucial for tax compliance, business operations, and financial transactions. This guide provides detailed information on the types, formats, issuance, and verification of TINs in Norway, based on information from the Norwegian Tax Administration (Skatteetaten). 

## **Official TIN Types & Local Names**

Norway utilizes three primary types of identification numbers as TINs: 

1. **Fødselsnummer (National Identity Number):** Assigned to individuals registered as residents in Norway.​
1. **D-nummer (D Number):** Assigned to individuals with a temporary connection to Norway, such as foreign workers or non-residents.​
1. **Organisasjonsnummer (Organisation Number):** Assigned to businesses and other legal entities.​

## **TIN Format & Structure**

1. **Fødselsnummer (National Identity Number):**
- **Structure:** 11 digits​
- **Composition:**  
  - First 6 digits: Date of birth (DDMMYY)
  - Next 3 digits: Individual number (odd for males, even for females)
  - Last 2 digits: Control digits
1. **D-nummer (D Number):**
- **Structure:** 11 digits​
- **Composition:**  
  - First digit: Always increases the day of birth by 40 (e.g., 22 becomes 62)
  - Next 5 digits: Month and year of birth (MMYY)
  - Next 3 digits: Individual number
  - Last 2 digits: Control digits
1. **Organisasjonsnummer (Organisation Number):**
- **Structure:** 9 digits​
- **Composition:**  
  - First digit: Indicates the type of entity
  - Next 7 digits: Serial number
  - Last digit: Control digit

## **Issuing Authority & Registration Process**

The Norwegian Tax Administration (Skatteetaten) is responsible for issuing TINs. 

- **Fødselsnummer (National Identity Number):**
- **Eligibility:** Individuals intending to reside in Norway for at least 6 months.​
- **Process:**  
  - Report the move to Norway to the National Population Register.
  - Provide necessary documentation, including proof of identity and residence.
  - Upon approval, a national identity number is assigned.
- **D-nummer (D Number):**
- **Eligibility:** Individuals with a temporary connection to Norway (e.g., short-term workers, board members).​
- **Process:**  
  - A Norwegian public agency or authorized enterprise requests a D number on behalf of the individual.
  - The individual may need to undergo an ID check.
  - The D number is assigned upon verification.
- **Organisasjonsnummer (Organisation Number):**
- **Eligibility:** All businesses and legal entities operating in Norway.​
- **Process:**  
  - Register the entity with the Brønnøysund Register Centre.
  - Submit required documentation, including details of the business and its founders.
  - Upon approval, an organisation number is assigned.

## **TIN Verification & Lookup**

To verify TINs: 

- **Individuals:** The Norwegian Tax Administration does not provide a public online portal for verifying national identity numbers or D numbers. Verification is typically conducted through official correspondence or by contacting Skatteetaten directly.​
- **Businesses:** Organisation numbers can be verified through the Brønnøysund Register Centre’s online database.​

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## **Connection Between TIN & VAT Number**

In Norway, the organisation number serves as the basis for the VAT number. For entities registered for VAT, the VAT number is the organisation number followed by the letters “MVA.” For example, if the organisation number is 123456789, the VAT number would be 123456789MVA. Separate VAT registration is required for businesses exceeding the threshold for VAT-liable turnover.​

## **Why Accurate TIN Validation Matters**

Ensuring the accuracy of your TIN is critical for both businesses and individuals in Norway. 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 Norway Skatteetaten portal or **[TaxDo real-time global tax ID verification platform](https://taxdo.com/services/tax-id-validator)** ensures accurate Tax ID validation, error reduction, and full compliance with Norway tax laws. 

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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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## Frequently asked questions

### What is a Tax Identification Number (TIN) in Norway?

In Norway, a Tax Identification Number (TIN) is a unique identifier assigned to individuals and entities for tax and regulatory purposes. The types include: Fødselsnummer (National Identity Number): For residents D-nummer (D Number): For temporary or non-resident individuals Organisasjonsnummer (Organisation Number): For businesses and legal entities These numbers are managed by the Norwegian Tax Administration (Skatteetaten) and are critical for tax compliance, payroll, and financial operations. Validate any TIN in Norway instantly with TaxDo’s real-time TIN validation tool — built for speed, security, and accuracy.

### What do Norwegian TINs look like?

Here’s a breakdown of the three standard TIN formats used in Norway: Fødselsnummer (for individuals): 11 digits – DDMMYYXXXCC D-nummer (for temporary individuals): 11 digits – first digit = birth day + 40 Organisasjonsnummer (for businesses): 9 digits – last digit is a control number Format compliance is key. Use TaxDo to verify TIN structure, source authenticity, and live registration status across all Norwegian ID types.

### How can businesses and individuals get a TIN in Norway?

Residents (Fødselsnummer): Assigned upon registration in the National Population Register Requires residence permit and in-person ID verification Non-residents (D-nummer): Requested by an authorized Norwegian entity (e.g., employer, public agency) Typically for short-term workers, contractors, or board members Businesses (Organisasjonsnummer): Register through the Brønnøysund Register Centre Automatically issued after business registration is approved Don’t risk onboarding without verification. Use TaxDo to validate all Norwegian tax IDs—seamlessly integrated with your ERP or CRM.

### Is the Norwegian VAT number the same as the TIN?

Yes — for businesses, the Organisation Number doubles as the VAT number once VAT registration is completed. VAT Number Format: \[Organisation Number\] + MVA Example: 123456789MVA VAT registration is mandatory for businesses exceeding the VAT threshold. Failure to validate VAT status may result in non-compliance. With TaxDo, validate Norwegian VAT numbers in real time, flag unregistered entities, and ensure your supply chain is tax-compliant.