Difference between provisional and definitive TIN in Portugal

January 31, 2025

The Número de Identificação Fiscal (NIF) is a very important tax identification number in Portugal, used for a variety of purposes, including filing tax returns, opening bank accounts and acquiring property. However, there are two types of TIN: the provisional TIN and the definitive TIN. This article will help you make informed tax choices.

Understanding the provisional TIN

The provisional TIN, also known as the Contribuinte TIN, is a temporary number issued to non-residents and temporary residents of Portugal. It is generally issued in the following situations:

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  • buying a property: a temporary NIF is needed to open a Portuguese bank account and buy a property;
  • obtaining a temporary residence permit: the provisional NIF is required to apply for and obtain a temporary residence permit in Portugal;
  • self-employment: self-employed non-residents must obtain a provisional NIF in order to work in Portugal.

The provisional NIF is generally issued in the form of a paper document with a nine-digit number. 

It is valid for a limited period, usually one year, and must be renewed if necessary. You can use the link https://anchorless.io/blog/moving/nif-portugal-complete-guide to make the process easier.

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Obtaining the definitive NIF

The definitive NIF, also known as the NIF de Cidadão, is a permanent tax number allocated to permanent tax residents of Portugal. It is a nine-digit number that remains valid for life.

To obtain the definitive NIF, you must first register with the Land Registry (Cadastro Predial) and obtain a taxpayer identification number (Número de Identificação do Contribuinte). Next, you need to go to a Portuguese tax office (AT) with the required documents, such as :

  • valid passport or identity card;
  • proof of residence in Portugal (electricity bill, rental contract, etc.);
  • completed NIF application form.

The definitive NIF is usually issued in the form of a plastic card with the holder's tax identification number and personal details.

In short, the provisional TIN is a temporary number for non-residents and temporary residents of Portugal, while the definitive TIN is a permanent number issued to permanent tax residents. The permanent TIN is used for all tax and non-tax purposes in Portugal.