Part-Time Work in Spain: Getting an NIE and Understanding Student Tax Rules

Why you need an NIE before you can work

The NIE (Número de Identidad de Extranjero) is the number Spain uses to identify you in any financial or administrative process: payroll, tax filings, opening a bank account, or signing a rental contract. No employer legally pays you without it. EU and EEA students need one too, even though they do not need a work visa, because payroll and tax records run on the NIE regardless of nationality.

If you already hold a residence card (TIE) as a non-EU student, your NIE is printed on it. EU/EEA students receive the NIE as a standalone certificate (certificado de registro), separate from any physical card.

How to apply for an NIE

You apply at an Oficina de Extranjería, a Comisaría de Policía with a foreigners' unit, or a Spanish consulate in your home country before you travel. Book an appointment (cita previa) online through the Ministry of the Interior's system, since walk-ins are rarely accepted in larger cities. Bring your passport, the EX-15 application form, and a document explaining why you need the number, such as your university enrollment letter or a job offer.

Processing usually takes from a few days to a few weeks depending on the office, so start the appointment booking as soon as you arrive, or before, if applying through a consulate.

Getting registered with the Seguridad Social

Once you accept a job, your employer registers you with the Seguridad Social under the Régimen General before your first working day. This gives you a Número de la Seguridad Social linked to your NIE, which follows you across jobs and, later, across EU countries if you keep working in Europe.

Your employer pays the larger share of social contributions on top of your salary. A smaller share comes out of your gross pay automatically each month, roughly 6.35 percent for a standard employee contract, covering common contingencies, unemployment insurance, and vocational training. You do not pay this separately, it shows up as a deduction line on your nómina (payslip).

How many hours you can work

Non-EU students on a student residence permit work without applying for a separate work authorization, as long as the job does not conflict with attending your course. Universities and employers commonly treat part time as roughly 30 hours a week during term, though the exact limit depends on your specific permit conditions, so confirm the figure on your residence card or with your international office rather than assuming it applies uniformly. EU, EEA, and Swiss students face no such restriction and work under the same conditions as Spanish nationals.

Income tax basics for student workers

Spain runs a progressive income tax (IRPF) with a personal tax-free allowance built in, so low earners typically pay little or nothing extra beyond what is withheld from their payslip. You generally only have to file an annual return if your gross employment income exceeds around 22,000 euros from a single employer in the year, or around 15,000 euros combined if you had more than one payer, according to figures reported by Spanish IRPF bracket summaries based on Agencia Tributaria rules.

Most part-time student jobs fall well under these thresholds, so many students end up with no filing obligation at all. If your employer withheld any tax during the year and you fall under the threshold, filing anyway can get you a refund, since withholding is calculated conservatively and does not always match your true annual liability.

Practical order of steps

Get your NIE first, since nothing else moves without it. Open a Spanish bank account once you have the NIE, so you can give your employer an IBAN for payroll. Accept the job offer, let your employer handle the Seguridad Social registration, and keep your first few payslips so you can check the withholding matches what you expect once the tax year ends.