How to Obtain a Social Security Number (NISS) in Portugal
Your Portuguese Social Security Number (NISS – Número de Identificação da Segurança Social) may be required if you:
Work in Portugal
Open a business or register self-employment
Apply for certain residency permits
Register for the Portuguese National Health Service (in some cases)
Receive a state pension from another EU country or the UK (with an S1 form)
Not everyone needs a NISS immediately, but if you plan to live or work in Portugal, it is often an important step.
Option 1: Apply Online (Most Common Method)
Foreign nationals can apply for a NISS online through the Portuguese Social Security website.
You will need:
A completed online application form
A scanned copy of your identification
Accepted ID documents:
EU/EEA/Swiss citizens
National ID card or passport
Non-EU citizens
Passport
Residence permit or residence authorization (if applicable)
If you start employment, your employer can also request a NISS on your behalf.
It is also possible to request a NISS for children.
Processing times vary.
Request your NISS here (but be warned it's much easier to do in person as this website is quite 'clunky')
Option 2: Apply in Person
You can apply at:
A Social Security office
Certain Citizen Shops
Some Citizen Space locations
Some offices are now able to issue:
NIF (tax number)
NISS (Social Security number)
SNS/User (health number)
at the same appointment, although availability depends on location.
Appointments are often required and can usually be booked online.
Check out the SIGA website to find your nearest appointment.
Do you need a work contract?
In most cases, a work contract is not required simply to obtain a NISS . The number can be issued before employment begins and is also available to non-residents in certain circumstances.
However, requirements may vary depending on your residency status and intended activity.
If You Are Self-Employed or Starting a Business
If you register a business activity in Portugal, you will have Social Security contribution obligations.
The amount payable depends on:
Your income
Your business structure
Your registration timing
For this reason, many buyers seek advice from an accountant before activating business activity.
If You Receive a UK or EU State Pension
If you receive a state pension from another EU country or the UK, you may need:
NISS
An S1 form issued by the country paying your pension
This allows you to access the Portuguese healthcare system under reciprocal arrangements.
Helpful Tips for Online Applications
Ensure scanned documents are clear and legible
Use common file formats such as PDF or JPEG
If uploading documents fails, try reducing file size
If the website is busy, try again at a quieter time
Our Role
While we do not obtain Social Security numbers directly, many of our buyers require a NISS as part of their move to Portugal, particularly if they plan to work or establish a business.
We guide our clients through the wider relocation process and introduce trusted legal and financial professionals where needed to ensure everything is handled correctly.