Your Social Security, in one click.
Contribution auto-calculated from your invoices, accountant-reviewed and filed error-free — with tax protection up to €1,500 per declaration.
Built for self-employed professionals and sole traders providing services in Portugal.
Social Security declaration with FIZ
Contribution auto-calculated from invoices issued in FIZ (or imported).
Adjust your contribution base (−25% / +25%).
One-click quarterly declaration filing.
Automatic connection to Segurança Social Direta.
Reviewed by an accountant before filing.
Tax Shield — up to €1,500 per declaration.
Smart reminders before the deadline.
Fewer errors and fewer late-filing fines.
Never miss a deadline
FIZ tracks every Social Security deadline and sends smart reminders — so you are never late.
Plans for sole traders
Start free with invoicing. Move up when you need Social Security, VAT and the AI Tax Assistant.
FIZ Base
Certified invoicing
- Certified, unlimited invoicing
- Web and mobile app access
- Certified by the AT (no. 3041)
FIZ Auto
FIZ Base + Social Security
- Everything in FIZ Base
- Social Security declaration in one click
- Auto-calculated contribution + reminders
FIZ Prime
FIZ Auto + VAT + AI Assistant
- Everything in FIZ Auto
- Periodic VAT declaration
- AI Tax Assistant
Tax Shield
Accuracy guaranteed with real money
Our automatic tax engine is built for total accuracy — and we back it with real money. Every declaration is protected with up to €1,500, depending on your plan. Full confidence, zero worries.
See plansYour Social Security, handled — no stress.
Get started now
AT № 3041
NIPC 517696835
1200-082, Lisbon, Cais do Tojo 24