Employer identification number in Spain

Introduction to Spanish Social Security

All Spaniards who habitually reside and work in Spain are included in the Social Security System, according to Article 7 of the General Social Security Law (LGSS). The system also includes those residing in the country who apply for non-contributory benefits, though stricter residency requirements apply to prevent misuse. Concepts such as “social tourism” have been developed to encourage travellers to engage meaningfully with local communities.

What is the Spanish social security system?

The Spanish Social Security system is a state-run structure that ensures financial protection and healthcare services for workers and their families. This system benefits all Spaniards living in Spain, as well as foreigners who reside or are legally present in Spain, provided they engage in activities within the country and fall under one of the following categories:

• Salaried employees.
• Self-employed individuals (freelancers).
• Members of worker cooperatives.
• Students.
• Civil servants or military.

Employers must contribute to this system to cover benefits such as:

Public healthcare.

Retirement pensions.

Maternity and Paternity leave.

Disability and unemployment benefits.

Why should foreign companies register?

Foreign companies intending to hire employees or remote workers in Spain need to first secure a CIF number (Tax Identification Number) from the Spanish Tax Agency as a non-resident foreign entity. After obtaining the CIF, they must then acquire the social security number to hire workers in Spain legally.

This is essential to ensure legal compliance, avoid fines and penalties for non-registration, legally hire employees, provide access to social security protections, and establish credibility with clients and partners in Spain.

Step-by-step registration process for Spanish employer number

To register as a freelancer or hire employees, you’ll need the following:

TA-1 form 

The TA-1 form is the key document in the employer number registration process in Spain. This official form is required for Social Security affiliation and the assignment of a Social Security number if you have not previously registered. It can be obtained from your local tax office (Agencia Tributaria) or downloaded from their official website.

When filling it out, you’ll need to provide detailed personal information, such as current employment status and up-to-date contact details. Many expatriates find this form complex at first, but taking your time to understand each section will make the process significantly smoother. Accuracy is crucial –  even minor mistakes may lead to your application being rejected or delayed.

ID or passport plus a photocopy

Spanish authorities require that the photocopy includes both the front and back of the document, ensuring that all details are clearly visible. Many expatriates find it useful to prepare multiple copies in advance, as different offices may request them. For added security, consider having your copies notarised or translated if your original documents are not in Spanish.

Rental contract, employment contract (if applicable), plus a photocopy

NIE (Foreign Identification Number), if you already have one

If you’ve already secured your NIE (Foreign Identification Number), this will play a vital role in your employer number registration process. The NIE serves as your primary identification for tax and administrative matters in Spain. It is required for opening bank accounts, signing employment contracts, fulfilling tax obligations, and accessing various social services.

The NIE creates a permanent record within the Spanish system that links all your official activities and documentation.

If you haven’t obtained your NIE yet, it’s advisable to complete this step before applying for your employer number, as the two processes are closely interconnected in the Spanish administrative system. Here, you can find step-by-step instructions on how to get a Spanish residency.