NUSS for Autónomos and DNV Holders in Spain: How and When

Why autónomos need their NUSS first

For employees, the NUSS sits in the middle of the registration process: you get your NIE, you start a job, your employer registers you with the TGSS, and along the way a NUSS is either looked up or created for you. For autónomos, the order is different. You cannot file your alta en el RETA (your self employed registration with the Tesorería General de la Seguridad Social) without a NUSS. The system requires it as an input, not an output. So if you do not already have a NUSS from a previous Spanish job or registration, you need to request one before you can complete the rest of your self employed setup.

This catches people out because the alta en el RETA is usually the step they focus on first, since it is what activates them as a legal self employed worker and starts their monthly contribution obligation. They assume the NUSS will be issued as part of the alta. It will not. Without a NUSS, the alta cannot even be submitted.

The correct sequence for new autónomos

If you are starting fresh as an autónomo in Spain, the sequence looks like this. First, NIE (the foreigner identification number). Second, empadronamiento (registration with your town hall, needed for many subsequent steps). Third, Certificado Digital (essential for all online filings with TGSS and Agencia Tributaria). Fourth, NUSS request through IMPORTASS. Fifth, Modelo 036 declaration of activity with the Agencia Tributaria (this is the Censos WEB wizard, mandatory since Modelo 037 was abolished in February 2025). Sixth, alta en el RETA with the TGSS through IMPORTASS, which uses your NUSS to register you in the self employed regime.

The whole sequence takes 1 to 4 weeks depending on appointment availability and how quickly your Certificado Digital gets issued. Once you have your NUSS, the actual RETA alta takes minutes. The bottleneck is almost always the steps before NUSS, not after.

How to request your NUSS through IMPORTASS

If you have your Certificado Digital installed, the NUSS request through IMPORTASS (portal.seg-social.gob.es/wps/portal/importass/importass) takes about 10 minutes. Log in with your certificate, navigate to the section for ciudadanos, choose Asignación de Número de Seguridad Social, fill in your personal details (NIE, name, date of birth, nationality, Spanish address), and submit. The system processes the request automatically and assigns your NUSS within 24 to 48 hours. You can then download the official assignment document, which you keep for the rest of your administrative life in Spain.

If you do not have a Certificado Digital, your alternative is a cita previa at a TGSS office, where you submit a paper TA.1 form (Solicitud de Afiliación a la Seguridad Social) along with your NIE and passport. The paper route works but adds days or weeks depending on appointment availability. Most autónomos who plan ahead get their Certificado Digital first and avoid the office visit entirely. The Certificado Digital is also needed for everything that comes next: the Modelo 036 Censos WEB wizard, the alta en el RETA itself, quarterly tax filings, and the annual Modelo 100 (Renta) in spring.

DNV holders: NUSS is non negotiable

Digital Nomad Visa holders are required by Spanish law to register as autónomos under RETA, regardless of who they actually work for. If you are on a DNV working remotely for an American, British, or German employer, you still need a Spanish NUSS, a Spanish RETA registration, and you still pay the Spanish autónomo contribution every month. This is one of the biggest surprises for DNV applicants, who often expect to keep their home country employment relationship and pay only their existing employer contributions. Spain requires you to enter its system. The NUSS request is identical to that of any other autónomo: through IMPORTASS, with Certificado Digital, in 10 minutes.

For DNV holders specifically, the timing matters even more. Your DNV is granted with the expectation that you will register as autónomo within 30 days of arrival (or within 30 days of receiving your TIE if you applied from inside Spain). Missing this window can complicate later renewals. Request your NUSS as soon as your NIE/TIE is in hand. Many DNV applicants underestimate this and run out of time.

If you already worked in Spain before: check for an existing NUSS

If you ever worked in Spain in the past, even briefly, you already have a NUSS. It does not expire and it does not change. Before requesting a new one, check IMPORTASS for an existing assignment. The portal has a service called Consulta de tu Número de la Seguridad Social that will return your existing NUSS if one was ever issued. Requesting a duplicate is not necessary and creates confusion. This applies to anyone who studied in Spain on a scholarship that included contributions, worked a summer job, or registered with social security for any reason in the past.

The same is true if you transition from employee to autónomo. Your NUSS stays the same. Your alta in the Régimen General is replaced by an alta in RETA, but the number that identifies you never changes. The TGSS keeps a single record of your entire contribution history under one NUSS, across all regimes and all years.

Pluriactividad: being employee and autónomo at the same time

Spain allows you to hold an employee job and run an autónomo business simultaneously, called pluriactividad. Your NUSS works the same way for both: one number, two altas (one under Régimen General by your employer, one under RETA by you). The system records the contributions from both regimes against your single NUSS and combines them for pension purposes. There is even a partial discount on autónomo contributions for new pluriactividad cases (50% off your autónomo base for the first 18 months), which is the most generous reduction in the Spanish social security system after the Tarifa Plana.

If you are coming to Spain to take an employee job and also want to invoice a few side clients, do not request a separate NUSS for the autónomo side. Use your existing employee NUSS. The system tracks both regimes against the same number. Adding a second NUSS is technically impossible and would create administrative confusion.

Family beneficiarios: NUSS extends coverage

Once you have your NUSS and are registered in RETA, you can register your spouse and children as beneficiarios. This means they get free public healthcare under your Seguridad Social contribution, even if they do not work themselves. The registration is done through IMPORTASS by you (the holder of the NUSS), uploading proof of family relationship (marriage certificate, birth certificates), proof of empadronamiento for each family member, and their NIE numbers. Each family member then gets their own Tarjeta Sanitaria linked to your NUSS.

This is one of the most underused features for autónomos with families. The cost is nothing extra beyond your existing monthly autónomo contribution, and the coverage is identical to public healthcare for the registered worker. Many newcomers waste money on family private health insurance for their first months when the public coverage is available the day they register.