What is the NIF? - Tax Identification Number in Spain

The NIF (Tax Identification Number) is the number that fiscally identifies individuals in Spain. For Spanish citizens, the NIF coincides with their DNI number followed by the control letter. For foreign residents, their NIF is the NIE.

Related tools:

Types of NIF

  • NIF for Spanish individuals: DNI (8 numbers + letter)
  • NIF for foreigners: NIE (X/Y/Z + 7 numbers + letter)
  • NIF for legal entities: CIF (letter + 7 numbers + control digit)

What is the NIF used for?

The NIF is necessary for:

  • Filing tax returns
  • Signing employment contracts
  • Invoicing services or products
  • Carrying out procedures with the Treasury
  • Opening bank accounts
  • Real estate operations

NIF Structure

For Spanish citizens, the NIF consists of:

  • 8 numeric digits: Sequential number
  • 1 verification letter: Calculated using a specific algorithm

Did you know...?

The NIF of a Spanish individual is identical to their DNI. The difference is in the use: while the DNI is an identity document, the NIF is used for tax and fiscal purposes.

NIF Validation

To validate a NIF you must:

  1. Verify that it has the correct format (8 numbers + letter)
  2. Check that the control letter is correct according to the official algorithm
  3. Verify that the numbers are valid

Frequently asked questions about the NIF

Are NIF and DNI the same?

For Spanish citizens, the number is the same, but its use is different. The DNI is an identity document, while the NIF is used for tax purposes.

How can I know if a NIF is valid?

Use our online NIF validator to instantly check if a NIF is valid.

Can the NIF change?

No, the NIF is a permanent number that is maintained throughout the person's life.

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