Tesorería General de la Seguridad Social (TGSS), Ministerio de Inclusión, Seguridad Social y Migraciones Edition TA.1 (V.6), printed 07-2024 4 pages

TA.1 — Application for Social Security registration, a Social Security number and changes of details (Spain)

The TGSS form for getting your Spanish Social Security number (NUSS), being registered with Social Security, or correcting your details.

Fill out TA.1 (Social Security number / registration) online View the form Free on every FileIt plan
TA.1 (Social Security number / registration) · TA.1 Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos
The official Tesorería General de la Seguridad Social (TGSS), Ministerio de Inclusión, Seguridad Social y Migraciones form, edition TA.1 (V.6), printed 07-2024 — blank
Page 1 of 4
TA.1 (Social Security number / registration) (2024) TA.1 Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos — page 1 of 4
Page 1 of 4
TA.1 (Social Security number / registration) (2024) TA.1 Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos — page 2 of 4
Page 2 of 4
TA.1 (Social Security number / registration) (2024) TA.1 Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos — page 3 of 4
Page 3 of 4
TA.1 (Social Security number / registration) (2024) TA.1 Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos — page 4 of 4
Page 4 of 4
Fill this form online Blank PDF from Tesorería General de la Seguridad Social (TGSS), Ministerio de Inclusión, Seguridad Social y Migraciones

What is TA.1 (Social Security number / registration)?

Modelo TA.1 (Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos) is the application form of Spain's General Treasury of Social Security, the Tesorería General de la Seguridad Social (TGSS). It is used to be registered with Social Security for the first time (afiliación), to be assigned a Social Security number, or to change the personal details Social Security holds about you.

The form asks for your name, sex, identity document, date and place of birth, parents' first names, nationality, address in Spain and contact details, then which of the three requests you are making and which documents you enclose. Its instructions say it must be typed or written in capital letters, without corrections, and that EU, EEA and Swiss citizens registered with a passport must provide their NIE within three months of entering Spain.

FileIt explains each box in English with the Spanish terms alongside, checks your DNI or NIE letter and your Social Security number's control digits, and prints your answers onto the official PDF in capitals, including the receipt on page 3 for the office to stamp. The finished PDF is saved in your FileIt vault. FileIt does not submit anything.

Who fills it
The worker or person applying (or their legal representative); the employer also signs when applicable
Given to
A TGSS provincial directorate or Social Security administration office (Administración de la Seguridad Social)
Documents
Your DNI, foreigner's card (NIE) or passport, and a disability certificate if relevant
Decision
The receipt states a maximum of 45 days to decide and notify, counted from entry in the TGSS register
Edition
TA.1 (V.6), July 2024
Pages
Form, instructions, receipt and data-protection notice

Who needs to fill out TA.1 (Social Security number / registration)?

  • People about to start their first job in Spain, including foreign workers, who don't yet have a Spanish Social Security number.
  • EU, EEA and Swiss citizens registering with Social Security in Spain.
  • People who need a Social Security number without being registered as workers, for example for dealings with Social Security.
  • Anyone already registered who needs to change or correct their details, such as their address, name or identity document.

When to use TA.1 (Social Security number / registration)

  • Before starting work in Spain, when you have never been registered with Spanish Social Security.
  • When a Social Security office or your employer asks you for your Social Security number and you don't have one.
  • After moving house, changing your identity document, or noticing a mistake in your Social Security record.

What you need before you start

  • Your identity document: DNI, foreigner's card with your NIE, or (EU, EEA and Swiss nationals only) your passport.
  • Your Social Security number, if you already have one (needed for a change of details).
  • Your date, town, province and country of birth, nationality and your parents' first names.
  • Your full address in Spain, e-mail and mobile phone.
  • Your disability certificate from IMSERSO or your region's competent body, if you have a recognised disability.

What’s on TA.1 (Social Security number / registration)

The 2024 edition has 4 pages. FileIt asks for it in 7 parts, and it is signed by Applicant (solicitante) and Employer (empresario/a):

  1. 1) Your details (Datos del solicitante)Applicant (solicitante)
  2. 1.8) Home address (Domicilio)Applicant (solicitante)
  3. 1.9) Electronic contact (Datos telemáticos)Applicant (solicitante)
  4. 2) What you are applying for (Datos relativos a la solicitud)Applicant (solicitante)
  5. 3) Where to send notifications (Datos relativos a la notificación)Applicant (solicitante)
  6. Place, date and signatureApplicant (solicitante)
  7. Employer's place, date and signature (when applicable)Employer (empresario/a)

How to fill out TA.1 (Social Security number / registration), step by step

1 1. Datos del solicitante (your details)

Both surnames and your first name, sex (H or M), the type and number of your identity document (with a foreigner's card, the NIE), your Social Security number if you have one, date of birth, parents' first names, place, province and country of birth, degree of disability if any, nationality and, for nationals of other EU countries where it applies, a maiden surname.

2 1.8 Domicilio (address)

Street type (calle, plaza...), the full street name without abbreviations, block, number, staircase, floor, door, postcode, municipality and province.

3 1.9 Datos telemáticos (electronic contact)

E-mail and mobile phone, and whether you accept information messages from Social Security. The instructions note that giving these details means accepting those messages.

4 2. Datos relativos a la solicitud (your request)

Mark one: registration with Social Security, assignment of a Social Security number, or change of details. For a change, give the reason briefly and fill in only the changed boxes plus your name, identity document and Social Security number. Then list the documents you enclose.

5 3. Notificación (notifications)

Choose whether letters go to your address in part 1 or to a different address, which you then give in full.

6 Place, date and signature

Write the place and date and sign. There is a second box for the employer's place, date and signature when applicable. At the foot, name the TGSS provincial directorate or administration office the application is addressed to.

Common mistakes to avoid

  • Writing in lower case or with corrections: the instructions ask for typing or capital letters without corrections or crossings-out.
  • Using a passport when you are not an EU, EEA or Swiss national; others use a foreigner's card with their NIE.
  • Forgetting to provide your NIE within three months when you registered with a passport.
  • Applying for a change of details without your Social Security number, or filling in every box instead of only the changed ones.
  • Not bringing your identity document, or the disability certificate if you gave a degree of disability.

After you fill it out

Print the form, sign it, and hand it in with your documents at a TGSS office. The office stamps the receipt on page 3 and gives it back to you. FileIt does not submit anything.

Keep the stamped receipt and, once you receive it, your Social Security number in your FileIt vault; employers, health services and benefits offices will ask for it.

Fill out TA.1 (Social Security number / registration) online with FileIt

  1. Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
  2. Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 65 fields in all. Your answers save as you go.
  3. Check the live preview. Watch your answers land on the real Tesorería General de la Seguridad Social (TGSS), Ministerio de Inclusión, Seguridad Social y Migraciones form, and let FileIt do any worksheet arithmetic.
  4. Generate the official PDF. FileIt prints your answers into the agency’s own PDF and files it in that person’s folder in your vault. Sign it, or send it for e-signature.

FileIt fills the form — it never files or submits anything for you. Deliver the finished form to whoever asked for it, the way the form’s instructions say.

Start TA.1 (Social Security number / registration) now — it’s free

TA.1 (Social Security number / registration): frequently asked questions

What is form TA.1 used for?

To be registered with Spanish Social Security (afiliación), to be assigned a Social Security number, or to change your details held by Social Security.

What is the NUSS?

The número de la Seguridad Social, your Spanish Social Security number. It is 12 digits long; the last two are control digits, which FileIt checks.

Where do I hand in TA.1?

At a TGSS provincial directorate or Social Security administration office. You write the office's name at the foot of page 1.

Can I use my passport?

Only if you are an EU, EEA or Swiss national. The form then requires you to provide your NIE within three months of entering Spain. Other foreign nationals use their foreigner's card and NIE.

How long does it take?

The receipt states that the maximum time to decide and notify is 45 days from the application's entry in the register, which can be suspended if documents are missing.

Does my employer need to sign?

The form has a box for the employer's signature 'when applicable'. In FileIt that part is optional.

Official sources

FileIt is not affiliated with or endorsed by Tesorería General de la Seguridad Social (TGSS), Ministerio de Inclusión, Seguridad Social y Migraciones or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-09-28.

Fill out TA.1 (Social Security number / registration) online