How Do I Get My Social Security Number In Spain?

When moving to Spain, starting work, or setting up your own business, one of the first pieces of paperwork you’ll need is a Spanish social security number. This number — known as the Número de Afiliación a la Seguridad Social — officially links you to the country’s healthcare and employment systems, making it essential for anyone earning money or contributing to the system.

Below we explain exactly what a Spanish social security number is, who needs one, and how to apply — both online and in person — using the latest 2025 process through Spain’s Import@ss digital platform.

What is a Spanish social security number?

The social security number, often called the Número de Afiliación or Número de la Seguridad Social, is your personal identifier for all dealings with the Spanish social security system. It’s sometimes also referred to as NUSS (Número de Usuario de la Seguridad Social) or NAF (Número de Afiliación). Regardless of the name used, they all refer to the same permanent number — once issued, it’s yours for life.

Along with your NIE number, this is one of the most important identification codes in Spain.

Why you need one

Your social security number allows you to access a wide range of benefits and services, including:

• Public healthcare and access to the Spanish health system
  
  
• Unemployment and sickness benefits
  
  
• State pension and retirement contributions
  
  
• Disability and maternity support
  
  
• Official work contracts and payroll registration

Without one, you can’t legally work, pay contributions, or register as self-employed (autónomo).

Who needs to apply

Anyone carrying out any kind of work or professional activity in Spain needs a social security number, including:

• Employees starting a new job
  
  
• Self-employed or freelance workers
  
  
• Students with paid internships or placements
  
  
• Business owners or partners
  
  
• Civil servants and military personnel

If you’re being hired by a company, your employer will normally apply on your behalf. However, if you’re self-employed, starting a business, or applying for your first job, you’ll need to apply yourself.

How to apply for a Spanish social security number (2025 process)

There are now two main ways to apply — online via the Import@ss portal or in person at a social security office.

1. Applying online (recommended)

The easiest and fastest method is through the official Import@ss portal. You can access it with a digital certificate, Cl@ve PIN, or permanent Cl@ve credentials.

Steps to apply online:

• Go to Import@ss and select “Request Social Security Number”.
  
  
• Log in with your digital certificate or Cl@ve credentials.
  
  
• Complete and upload the TA-1 form.
  
  
• Attach clear scans of your required documents:
• Passport or national ID (EU citizens)
• TIE or residency card with NIE (non-EU residents)
• Padrón certificate (proof of address)
• Work or internship contract, or self-employment registration
• Visa or residence permit (if applicable)
  
  
• Submit the application online.

Applications are usually processed within 24 hours. Your assigned number will appear in your Import@ss profile, where you can download an official certificate confirming your registration.

2. Applying in person

If you prefer, or if you don’t yet have digital credentials, you can apply at your nearest Social Security office (Tesorería General de la Seguridad Social).

To apply in person, you’ll need to:

• Download and complete the TA-1 form
• Book a cita previa (appointment) via the Social Security website or by phone
• Bring your identification and the same supporting documents as listed above
• Attend your appointment and submit your application

Your number is typically issued during the appointment. Note that not all staff speak English, so it may help to take a Spanish-speaking friend or colleague with you.

After receiving your number

Once issued, your social security number stays with you for life — it never changes and doesn’t need to be renewed. You’ll use it for everything from healthcare access to employment and tax filings. Keep a copy of your official certificate in your records, as many employers and banks will request it during onboarding or account setup.

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Sources

Import@ss Official Portal | TA-1 Form | Social Security Office Directory