Do My Children Need a NIF?

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James Cave / Last Updated: January 9, 2023 / Posted in: QandA are able to arrange a NIF for $150 (or $140 for Portugalist readers). The current turnaround time is one week.

Discount applied automatically (no code needed).

Adults who are resident in Portugal need a Número de Identificação Fiscal (or NIF for short). This number is used for most transactions in Portugal. It’s optionally used in shops, for example, such as when you’re buying your groceries, and it’s needed for purchases like buying a house or car. You’ll also need one if you’re signing a contract to rent a house or apartment.

But those are all things that adults do. Children are not going to be renting a house or buying a car, so will they need a NIF number as well?

According to Kathleen Lo from, a website that helps people obtain a NIF number and bank account, ‘there isn’t a hard requirement on age, but your child will need a NIF in order to enroll in school.’

So, even though a child is unlikely to use a NIF on a day-to-day basis like an adult would, they will still need a NIF number at certain points, such as when they enrol in school.

Similarly, your child may also require a NISS to register (along with other documents like a vaccination certificate).

As blogger Alicia writes,

“You must get a NISS number,” said the teacher, standing in the sunlight and showing me a piece of paper with a list scribbled on it. “We need a NISS, and a vaccination certificate for your son. Also a health card.” All that? Where do we start?

There are a few ways to obtain a NISS or social security number, some free or by using a paid online service like E-Residence.



  1. Hi, thanks for the very useful articles!

    I also found out that for the child to be able to enroll in the school you need a NISS number. Do you hear anything about this?


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