How to Apply NISS Number in Portugal | Guide for U.S. Citizens

Learn how to apply NISS number in Portugal as a foreigner. Step-by-step guide, required documents, remote application, and expert assistance from INLIS Consulting.

What is a NISS Number in Portugal?

The NISS is your Portuguese Social Security Number. It is mandatory for:

• Employees working in Portugal

• Freelancers and self-employed individuals

• Accessing healthcare, unemployment benefits, pensions, and social services

For foreign residents, including Americans, obtaining a NISS is necessary to start working legally or receive social benefits.

Who Needs a NISS Number in Portugal?

Type of Person	Requirement
Employee	Anyone starting a job in Portugal must have a NISS for tax and social security deductions
Freelancer	Required to register as a self-employed professional and pay contributions
Resident	Required for accessing healthcare, social benefits, and other government services
Investor or Entrepreneur	Needed when opening a company or business in Portugal

Foreigners, including U.S. citizens, may apply for NISS through a legal representative if they are not yet residing in Portugal.

How to Apply NISS Number in Portugal

Step 1: Gather Required Documents

Document	Description
Passport	Valid copy of your passport with personal details
Residency Proof	Rental contract, utility bill, or visa document (if applicable)
Employment Contract or Declaration	If working for a company in Portugal or a self-employment declaration
Legal Representative Authorization	Power of attorney if applying remotely through a service like INLIS Consulting

Step 2: Submit the Application

Foreigners can apply for NISS in Portugal through:

1. Social Security Office (Segurança Social) – in person

2. Remote application through a legal representative, like INLIS Consulting

INLIS Consulting ensures all documents meet legal requirements, submits your application to the Portuguese Social Security office, and follows up until approval.

Step 3: Receive Your NISS

After approval, your NISS will be sent electronically. This number allows you to:

• Legally work and pay social security contributions

• Register for healthcare and social benefits

• Open a business or freelance activity

Timeline for NISS Application

Step	Duration
Document Preparation	1-2 days
Submission	1 day
Processing by Segurança Social	3-7 business days
Delivery of NISS	Within 1 week after approval

Common Mistakes to Avoid

• Submitting incomplete or expired documents

• Applying without legal representation if outside Portugal

• Confusing NISS with NIF (tax number)

• Missing follow-up on application status

INLIS Consulting Assistance

INLIS Consulting provides full support to foreign residents and Americans to obtain their NISS:

• Remote application without traveling to Portugal

• Assistance in document preparation

• Fast submission and follow-up

• Legal compliance and bilingual support

Contact INLIS Consulting for NISS Application

• Email: geral@inlis.pt

• WhatsApp: +351 968 464 906

Start your professional and personal journey in Portugal with confidence. Let INLIS Consulting handle your NISS application from start to finish.

FAQs – How to Apply NISS Number in Portugal

1. Can foreigners apply for NISS remotely? Yes, through a legal representative like INLIS Consulting.

2. Is NISS required for freelance work? Yes, all freelancers must have a NISS for social security contributions.

3. How long does it take to get a NISS? Usually 1-2 weeks, depending on document submission and Social Security processing.

4. Can NISS be applied before getting a NIF? Yes, but having a NIF (tax number) may simplify the registration.

5. Is NISS mandatory for accessing healthcare? Yes, the NISS number is necessary for social security and healthcare access in Portugal.