First in Portugal
Taxes on autopilot. Fine protection included.
For independent professionals in Portugal: free certified invoicing + automatic VAT & Social Security + Tax Shield up to 1.500€.
AT № 3041
AT certified
15.000+
Happy clients
4.9 ★
App Store & Google Play
+8M€
Invoiced per month
FIZ in 3 steps — from zero to total peace of mind
FREE
Create invoices in seconds — sent straight to the Tax Authority
On the app, website or WhatsApp. The invoice is automatically communicated to the Tax Authority. You just invoice — FIZ handles the rest.
+8M€ invoiced
per month
AUTOMATIC
All your taxes on autopilot. Submit in one click.
VAT, Social Security, contributions — all calculated automatically. When the time comes, you just confirm and submit. No errors, no missed deadlines.
0 fines on declarations submitted by FIZ
PROTECTION
Activate protection and ask our AI tax consultant anything
Tax Shield: up to 1.500€ protection per declaration if you get a fine. AI tax consultant that answers any question, 24/7 — via chat or WhatsApp. From day one.
Start free — activate when you want
First in Portugal
If you ever get a fine — we pay
Every declaration submitted through FIZ is backed by a real monetary guarantee. Up to 500€ on Auto. Up to 1,500€ on Prime.
✓ Verified by accountant
✓ Response < 24h
✓ Accountant + lawyer
Everything you need — in one place
Certified invoicing
Create and send invoices in seconds. Free forever.
Automatic Social Security
Calculated and submitted in one click.
Automatic VAT
Periodic declaration with no surprises.
AI Tax Consultant
24/7 answers to any tax question.
Expense management
Expenses organized automatically.
Financial dashboard
Income, taxes, deadlines — all visible.
Rated ★ 4.9
on the App Store and Google Play
15,000+ independent professionals trust FIZ
Tax questions? Instant answers, 24/7
Our AI Tax Consultant answers any question about VAT, income tax, Social Security — via chat or WhatsApp.
Can I deduct my apartment rent if I work as a freelancer from home? How can I do it?
IM
It can be possible to use part of your rent, but it depends on your regime:
Simplified Regime: you generally don’t deduct rent directly — it can help justify expenses (via e-fatura).
Organized Accounting: you can deduct the business-use part, typically up to 25% for mixed-use home expenses.Tell me your regime and I’ll outline the safest steps.
Frequently Asked Questions
Start today — free invoices, automatic declarations, zero stress.
★★★★★ 4.9/5
15,000+ independent professionals
AT № 3041
NIPC 517696835
1200-082, Lisbon, Cais do Tojo 24