How to apply for a Social Security number in Spain?

You can apply for your Social Security number in Spain for free online at Importass or in person at the General Treasury. It's a personal identifier called a NUSS (Social Security Number) used for employment-related procedures and is also linked to regional healthcare management.

What is NUSS and what is its purpose in Spain?

Your Social Security Number, or NUSS, is the number that Social Security uses to identify you and may be the same as your affiliation number when you start contributing. It is used for registrations, benefits, and other official procedures related to your relationship with the system.

In addition, your autonomous community’s health service may use that number to handle registration for your health card when applicable.

Who can request a Social Security number and when should you check it?

Anyone who doesn't yet have a Social Security number can apply. Sometimes one already exists because of past work in Spain or specific coverage such as school insurance, so it's advisable to check before starting a new application.

For many expats and temporary workers, the typical time is before starting work or when preparing documentation for a contract.

How do I apply for a Social Security number online?

The online route is handled via Social Security services, where you can request or verify your Social Security affiliation number depending on your identification method. You will usually need identity details, contact information and an address, and the portal will guide you through the steps.

If you don't have electronic identification, the portal offers alternative verification methods, which may include identity documents and image verification. In that case, it's usually helpful to prepare the documents in advance and check that the photos are legible.

Can it be requested in person at the office, and what does the administration usually ask for?

You can also complete the process at a Social Security General Treasury office, especially if you are unable to complete the online identification. In these cases, you will typically need to bring a valid ID and the personal information required to register your details correctly.

In certain cases, the administration may use forms such as the TA.1 model, which is designed for registration, number assignment, and data modification. This model includes instructions and contact fields, and the receipt specifies administrative processing times.

What does this have to do with the health insurance card and traveling in Europe?

The NUSS (National Health Insurance Number) may appear in procedures related to registering for a health insurance card, but access to healthcare depends on your individual circumstances and the recognition of your right through the appropriate channels. Therefore, it's important to distinguish between having an identifier and having a recognized right to healthcare.

For temporary travel within Europe, the most well-known instrument is the European Health Insurance Card (EHIC), which is obtained from the National Health Service and has specific rules of use. It is not intended for trips whose purpose is to receive medical treatment, and its validity depends on your status as an insured person or beneficiary.

This text is for guidance only and does not replace medical advice or administrative guidance. Always consult the official channels of the Social Security system and your regional government before starting any procedure.