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 No. 3041
Certified
by the AT
15.000+
Customers
satisfied
4.9 ★
App Store
and Google Play
+8M€
Invoiced
per month
FIZ in 3 steps —
from zero to total peace of mind
FREE
On the app, website or WhatsApp. The invoice is automatically communicated to the Tax Authority. You just invoice — FIZ handles the rest.
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 the AI tax consultant anything
Tax Shield: up to 1.500€ protection per declaration if you get a fine. From the first day.
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.
15,000+ independent professionals trust FIZ
Katherine P
Easy and practical to use! I love it!
Rui Fernandes
Very intuitive app, simple to use, excellent results — and above all, it’s free! Congrats to the creators.
Renato
Practical and intuitive — issuing an invoice is easier than with the Tax Authority. Support is efficient.
Anthony Sequeira
Very easy to use and a really helpful app. Switching to FIZ was worth it.
RDPina
The product is fantastic. It could allow editing the description and price of the product (already created previously) directly on the invoice.
Well Cardoso
Excellent! A very complete and free invoicing system. I recommend it!
Three simple plans
VAT Exempt
Subject to VAT
For sole traders under the standard VAT regime
FIZ Base
Invoicing
0
€
FIZ Auto Pro
FIZ Base + Soc.Security + VAT
14
.99
€
FIZ Prime Pro
FIZ Auto Pro + Intra-EU VAT + AI Tax
24
.99
€
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
Does FIZ actually submit to Social Security and VAT?
Does FIZ actually submit to Social Security and VAT?
Yes. Fully integrated with Social Security and the Tax Authority, certified by AT nº 3041. Submissions are electronic, secure, and always on time.
Do I need to calculate values manually?
Do I need to calculate values manually?
No. FIZ automatically calculates VAT and the Social Security base from your invoices. You can review and adjust before confirming.
Can I adjust my Social Security income base?
Can I adjust my Social Security income base?
Yes, between -25% and +25% of the calculated value.
Will I get reminders?
Will I get reminders?
Yes. Automatic notifications are sent before every VAT and Social Security deadline.
Do I still need an accountant?
Do I still need an accountant?
No, an accountant is not required. FIZ handles everything for independent professionals — from invoices and IVA to Social Security. For complex inquiries that require personalized analysis, we’ll be happy to connect you with one of our trusted partner accountants. If you run a company, we’ll connect you with a partner accountant. Prefer your own? Just share access and collaborate directly through FIZ.
Can I cancel anytime?
Can I cancel anytime?
Yes. No long-term contracts. Cancel anytime with no extra fees.
What do I need to get started?
What do I need to get started?
Create an account, connect with the AT, and start invoicing through FIZ.
Is FIZ safe?
Is FIZ safe?
Yes. All communication is encrypted, and data is stored on secure EU servers.
Does FIZ automatically pay my taxes?
Does FIZ automatically pay my taxes?
No. FIZ submits your declarations, but you make the payment via bank or Multibanco.
How does support work?
How does support work?
Basic support is included in all plans. With Prime, you get priority support — faster responses and dedicated assistance.
Are prices final or will VAT be added?
Are prices final or will VAT be added?
All prices shown already include VAT.
Start today — free invoices, automatic declarations, zero stress
AT № 3041
NIPC 517696835
1200-082, Lisbon, Cais do Tojo 24