Getting Your NISS: Complete Guide

Your NISS (Numero de Identificacao da Seguranca Social) is your Portuguese social security number. You need it if you plan to work in Portugal (employed or self-employed) and to access certain healthcare services.

What You Need

• Valid passport or EU ID card
• NIF (get this first!)
• Proof of address in Portugal
• Employment contract (if applicable)

Where to Apply

**Seguranca Social Direta (Online)** Visit app.seg-social.pt — you can request your NISS online if you already have a Chave Movel Digital or digital certificate.

**In person** Visit your local Centro Distrital da Seguranca Social. Bring all documents listed above.

Step-by-Step Process

1. Get your NIF first (see our NIF guide)
2. Gather required documents
3. Visit Seguranca Social or apply online
4. Submit your application
5. Receive your NISS by mail (5-15 business days)

Cost

Free.

Important Notes

• Employers can also register you and obtain your NISS
• Self-employed workers (Recibos Verdes) must register and start making contributions within 12 months of their first invoice
• Your NISS is linked to your social security contributions and future pension rights