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How to Obtain the Social Security Affiliation Number in Alcalá de Henares (2026)

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Cost

Free

Free process

Time at office

30 minutes at the appointment

Estimated time

Immediate online

Quick summary

Instructions on how to get your Social Security Affiliation Number (NAF) in Alcalá de Henares. Free process, online or in person at the Treasury General.

Required documents

  • DNI, NIE or passport

    Valid original identification document.

0 €
Free process €0.00
€0.00
€0.00

: 2026

Step by step

  • 1

    Online Process (Recommended)

    Go to official site

    Log 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 site

    Request an appointment at the Treasury General of Social Security in Alcalá de Henares.

    !

    Expert tip

    "Always bring your DNI or NIE original document."

Offices and service points - Alcala De Henares

General Treasury of Social Security — Alcalá de Henares

Monday to Friday: 09:00 - 14:00

Frequently asked questions

Is the NAF the same as the NIF?
No. The NAF (Affiliation Number) is specific to Social Security and used for contributions. The NIF is your tax ID number (your DNI or NIE). They are different documents.
When do I need the NAF?
When you start working, if you become self-employed, or when you need to access Social Security benefits.

Official sources and useful links

This guide is for informational purposes only. Always check the official source for current information.