Obtaining a Social Security Number in Barcelona (2026)
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Cost
Free
Free procedure
Time at office
30 minutes at the appointment
Estimated time
Immediate online
Quick summary
How to get the Social Security Affiliation Number (NAF) in Barcelona. Free procedure, online or in person at the General Treasury.
Required documents
-
DNI, NIE or passport
Valid original identity document.
0 €
Free procedure €0.00
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€0.00
: 2026
Step by step
- 1
Online procedure (recommended)
Go to official siteLog in with Cl@ve or digital certificate to the Social Security Electronic Office.
!Expert tip
"If you already have a Cl@ve, the process is immediate and can be done from home."
- 2
In person with prior appointment
Go to official siteBook an appointment at the General Treasury of Social Security in Barcelona.
!Expert tip
"Always bring your DNI or NIE original document."
Offices and service points - Barcelona
General Treasury of Social Security — Barcelona
Monday to Friday: 09:00 - 14:00
Frequently asked questions
Is the NAF the same as the NIF?
No. The NAF (Affiliation Number) is unique to Social Security and used for contributions. The NIF is the tax identification number (your DNI or NIE). They are different documents.
When do I need the NAF?
When you start working, if you register as self-employed, or when you need access to Social Security benefits.
Official sources and useful links
This guide is for informational purposes only. Always check the official source for current information.