Spain Tax ID Number (TIN) Guide

Introduction

In Spain, a Tax Identification Number (TIN) serves as a unique identifier for individuals, businesses, and entities in all tax-related matters. Having the correct TIN is crucial to ensure compliance with Spanish tax regulations. All data presented in this guide is verified from official tax authority websites and trusted government sources.

Tax Identification Number Types

Spain utilizes several types of TINs, each designated for specific categories of taxpayers:

Número de Identificación Fiscal (NIF): This is the primary TIN used for both individuals and legal entities. For individuals, the NIF is identical to their Documento Nacional de Identidad (DNI) number. For legal entities, it was formerly known as the Código de Identificación Fiscal (CIF).
Número de Identificación de Extranjero (NIE): Assigned to foreign residents in Spain, the NIE starts with the letter ‘X’ or ‘Y’ and is used for tax and legal purposes.

TIN Format and Structure

The structure of each TIN type is as follows:

NIF for Individuals:
- Format: 8 digits followed by a letter (e.g., 12345678A).
- Structure:
  - First part: 8-digit unique identifier.
  - Last part: A single letter used as a checksum to validate the number.

NIF for Legal Entities:
- Format: A letter, 7 digits, and a letter (e.g., A12345678).
- Structure:
  - First part: A letter indicating the type of entity (e.g., ‘A’ for public limited companies).
  - Middle section: 7-digit unique identifier.
  - Last part: A single letter used as a checksum.

NIE:
- Format: A letter, 7 digits, and a letter (e.g., X1234567T).
- Structure:
  - First part: A letter (‘X’ or ‘Y’) assigned to foreign residents.
  - Middle section: 7-digit unique identifier.
  - Last part: A single letter used as a checksum.

The letters ‘I’, ‘Ñ’, ‘O’, and ‘U’ are excluded from the checksum calculation. The sequence of letters used for validation is: T, R, W, A, G, M, Y, F, P, D, X, B, N, J, Z, S, Q, V, H, L, C, K, E.

Issuing Authority and Registration Process

The Agencia Tributaria (Spanish Tax Agency) is responsible for issuing TINs in Spain.

Official Name: Agencia Estatal de Administración Tributaria.

Website: https://www.agenciatributaria.es

Registration Process:

Eligibility Requirements:
- Individuals: Spanish citizens or foreign residents.
- Legal Entities: Companies and organizations operating in Spain.

Required Documents:

For Individuals:
- DNI for Spanish citizens.
- NIE for foreign residents.

For Legal Entities:
- Company registration documents.
- Proof of entity type (e.g., public limited company, limited liability company).

Application Process:

Online: Through the Agencia Tributaria’s official website.
In-Person: At local tax offices or designated government centers.

Fees: Typically, there are no fees for obtaining a TIN.

For detailed instructions and forms, visit the Agencia Tributaria’s official website.

TIN Verification and Lookup

Individuals and businesses can verify their TIN through the Agencia Tributaria’s official channels.

Online Verification Tool: Available on the Agencia Tributaria’s website, allowing users to validate TINs. Or Instantly Verify Tax IDs in Spain with TaxDo Real-Time TIN Validation Platform

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

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TIN and VAT Number Connection

In Spain, the NIF serves as the VAT number for businesses. The format for VAT numbers aligns with the NIF for legal entities, starting with a letter indicating the entity type, followed by 7 digits and a checksum letter (e.g., ESA12345678).

Why Accurate TIN Validation Matters

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

Stay Compliant with TaxDo

While the Agencia Tributaria offers a basic PIN checker, TaxDo takes Spain 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 Spain and beyond.