Social Security in Spain: How the Seguridad Social Works
The Seguridad Social is Spain's public social security system. It gives you access to public healthcare, builds your pension, covers you during sick leave, and protects you if you lose your job. Almost everyone who lives and works in Spain is connected to it. The hard part is not the system itself; it is knowing which of the four registration routes applies to your situation, because the route determines your process, your documents, and whether you contribute or not. This page explains how the Seguridad Social works in 2026, what it covers, and walks you through each of the four routes so you can identify yours.
What the Seguridad Social covers
The system provides a broad set of protections. Public healthcare through the Sistema Nacional de Salud gives you a GP at your local Centro de Salud, specialist referrals, hospital care, and prescriptions at reduced prices. Retirement pensions are paid by the INSS based on your contribution history. Temporary incapacity benefits cover extended sick leave. Maternity and paternity leave provide paid time off for each parent. Unemployment benefits are available to employees who lose their job and have contributed enough months. Family benefits and disability support complete the picture.
What it does not fully cover: dental care, optical care, and certain specialist treatments with long waiting lists. That gap is exactly why many residents combine public coverage with private insurance. We compare the two in detail in our guide on public versus private healthcare in Spain.
How the system is structured: TGSS and INSS
The Seguridad Social has two operational arms that newcomers constantly confuse. The TGSS (Tesorería General de la Seguridad Social) handles the money: it collects contributions, manages registrations, and issues your NUSS. The INSS (Instituto Nacional de la Seguridad Social) handles the benefits: it assesses entitlements and pays out pensions, sick leave, and maternity benefits. You register with the TGSS. You claim from the INSS. We explain the split in full in our blog on the difference between TGSS and INSS.
Your NUSS: the number that connects everything
Your NUSS (Número de la Seguridad Social) is your personal social security number. It is not the same as your NIE, which is your identification and tax number. The NUSS links you to your GP, your contribution history, your pension record, and your entitlements, and it appears on your Tarjeta Sanitaria. Without a NUSS you cannot access public healthcare or build pension rights. If you do not yet have one, our blog on how to get your NUSS explains the process, and there is a separate guide for autonomos and Digital Nomad Visa holders whose route differs slightly.
The four routes into the system
How you register with the Seguridad Social depends entirely on your situation. There are four main routes. Find yours below; each one links to the module that walks you through it step by step.
Route 1: You are employed by a Spanish company
Your employer handles most of the registration. They register you with the TGSS and contribute on your behalf. In 2026 the employer pays roughly 30% of your gross salary and your own share of approximately 6,35% is deducted from your payslip. Once registered you receive your NUSS and can collect your Tarjeta Sanitaria at your local Centro de Salud.
What you still do yourself: complete your empadronamiento, register at the Centro de Salud for your health card, and confirm your employer actually completed the alta. Our blog starting a job in Spain covers what to check.
Our Seguridad Social Employee module guides you through what your employer should do, what you do yourself, and how to get your Tarjeta Sanitaria.
Route 2: You are self employed (autónomo)
You register with the TGSS under the RETA scheme and pay a monthly contribution based on your real net income. Since the 2023 reform, fully in force for 2026, there are 15 income brackets ranging from roughly 200 to 590 euro per month. New autonomos benefit from the Tarifa Plana: a flat 87 euro per month for the first 12 months. We explain the bracket system in our blog on the autónomo real income system.
Registration runs through the IMPORTASS portal and requires your alta censal from the Agencia Tributaria first. For how social security fits the wider autónomo picture, see autónomo and Seguridad Social.
Our Autónomo module covers both the Hacienda registration (Modelo 036) and the TGSS registration, step by step.
Route 3: You are a pensioner from another EU country
If you receive a state pension from another EU country, you enter the Spanish system through the S1 form. This document is issued by the health authority of your home country: the CAK in the Netherlands, your Krankenkasse in Germany, the relevant authority in other countries. The S1 entitles you to public healthcare in Spain at your home country's expense, with no direct contributions to the Spanish system.
You take the S1 to the INSS, which processes your registration and assigns your NUSS. Our blog on retiring to Spain and the S1 form explains your healthcare rights in detail.
Our Seguridad Social Pensioner module guides you through the S1 form, the INSS registration, and your Tarjeta Sanitaria.
4: You are not working and do not have an S1
If you are not employed, not self employed, and not an S1 pensioner, you do not automatically qualify for public healthcare. This is common for early retirees, non working partners, and people living on savings. You have two options. Private health insurance, which is also required for EU residency registration via EX-18 if you are not working. Or the Convenio Especial, a voluntary agreement giving public healthcare access for roughly 60 euro per month under 65, or 157 euro per month at 65 and over.
If you have non working family members, they may instead be covered as beneficiarios on the contributor's registration, which is a separate route covered by its own module.
Employee or autónomo: the contribution difference
Many people moving to Spain can choose between employment and self employment, and the Seguridad Social treatment differs sharply between the two. An employee's contribution is mostly paid by the employer; an autónomo pays the full monthly cuota themselves. We compare what each route costs and protects in our blogs on self employed versus employee Seguridad Social and the real cost of Seguridad Social.
Covering your family
If you contribute to the Seguridad Social, your non working spouse and children can often be registered as beneficiarios under your number, giving them public healthcare access without contributing themselves. The rules on who qualifies and how to register them are explained in our blog on family beneficiarios in the Seguridad Social.
The Tarjeta Sanitaria: your key to public healthcare
Once you are registered through any of the four routes, you go to your local Centro de Salud with your NUSS, your NIE or TIE, and your empadronamiento to get your Tarjeta Sanitaria. This health card is linked to your assigned GP and gives you access to the full range of public healthcare services. Without it, you are limited to emergency care.
Frequently asked questions
Find your route and register with confidence
Pick the module that matches your situation. Each one walks you through the TGSS and INSS steps, the documents, and getting your Tarjeta Sanitaria.
Moving to Spain made simple.
