About the document
- Country:
- Spain
- Category:
- Social Security and pensions
- How to fill:
- Chat in any language → original form → PDF
- Price:
- form free · chat €5 per document
- Last updated:
What this document is
TA.1 (“Solicitud de afiliación a la Seguridad Social, asignación de número de Seguridad Social y variación de datos”) is the official form of Spain’s General Treasury of Social Security (TGSS). It is used to obtain a Social Security number (NSS, also called número de afiliación), to register with the system for the first time (afiliación) or to correct your data: address, identity document, surname.
You need an NSS to work as an employee, to register as self-employed (autónomo), and for healthcare and benefits. The number is assigned once for life and is not the same as the NIE.
Who files it and where
- a foreigner or Spanish citizen who has no NSS yet — for example before a first job or studies with an internship;
- a worker whose data has changed (new NIE instead of a passport, a move, a change of surname);
- filing — at an Administración de la Seguridad Social or the TGSS Provincial Directorate for your home (or employer’s) address, or online through Import@ss — even without Cl@ve, using a photo of your ID and a selfie;
- an employer must request the affiliation before a new worker starts; if the employer files it, the employer signs the employer’s signature box.
What to attach
- an identity document: DNI, foreigner card (NIE/TIE) or passport — a passport is accepted only for EU, EEA and Swiss citizens;
- with a recognised disability — the certificate of its degree;
- if something is missing, the TGSS asks you to complete the application or bring documents within 10 days (the «Subsanación» part).
The decision takes up to 45 days; if none is issued, the application may be deemed approved (as the form states). The office stamps the receipt on page 3.
How the form is laid out
Four pages: the application (applicant’s details, address, type of request, notification address, signatures), instructions, a filing receipt with a “Subsanación” part for the office, and data-protection information. Write in capital letters. FoxDocs types your data into the fields of the official PDF without changing its layout; the NSS and document number are repeated on the receipt automatically.