These are the terms used for the tax ID numbers for individuals and companies in Spain:

• NIE (Número de Identificación de Extranjero): See our NIE page.
• DNI (Documento Nacional de Identidad): This is the ID number for Spanish citizens. The same number is used for one's driver's license.
• NIF (Número de Identificación Fiscal): This is the generic term for the tax ID number for all individuals. For Spaniards, it's the DNI plus one letter; for foreigners, it is your NIE.
• CIF (Certificado de Identificación Fiscal): This is the tax ID number for all companies. It consists of a letter followed by 8 digits. The letter represents the type of company, the most common being an 'A' for Sociedad Anónima or a 'B' for Sociedad Limitada. For companies nonresident in Spain, the letter is 'N'.
• European VAT number (Número IVA): This is 'ES' followed by the CIF.
• Social Security Number: Your employer applies for this number when you start your first job in Spain. This number then stays with you for all subsequent jobs. If you are self-employed, you apply yourself for this number.
• CCC Number (Código de cuenta de cotización): This is the employer's social security number.