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Invoicing

AI Consultant

TI / ENI

Companies

Accountants

Log in

Start free

FIZ Logotype

Log in

Start free

Invoicing

For TI / ENI

Social Security

VAT

Tax Shield

Tax Shield

Tax Shield

Plans

Companies

For Accountants

Help

Log in

Start free

FIZ Logotype

Invoicing

For TI / ENI

Social Security

VAT

Tax Shield

Tax Shield

Tax Shield

Plans

Companies

For Accountants

Help

Log in

Start free

Certified invoicing — unlimited and free. Forever.

Create and send invoices to the Tax Authority in seconds — via web, app, or WhatsApp (voice & text).

Create and send invoices to the Tax Authority in seconds — via web, app, or WhatsApp (voice & text).

Create and send invoices to the Tax Authority in seconds — via web, app, or WhatsApp (voice & text).

AT № 3041

Certified by
the Tax Authority

15.000+

Satisfied clients

+8.000.000 €

Billed with FIZ
(monthly)

4,9 ★

15.000

Average rating on App Store & Google Play

Average rating on App Store & Google Play

AT № 3041

Average rating on App Store & Google Play

4,9 ★

Average rating on App Store & Google Play

8.000.000 €

Average rating on App Store & Google Play

Free forever

No subscriptions, no limits, no tricks. Just reliable, certified invoicing — always free for you.

Now even in chat!

Create and send invoices directly in the chat you already use. Type or speak — your invoice is ready.

Now even in chat!

Create and send invoices directly in the chat you already use. Type or speak — your invoice is ready.

Invoicing

Invoice without complications — fast, simple, and professional. Invoicing with automatic submission to AT is free forever.

Access via web and mobile app (Android & iOS)

Unlimited invoices

Automatic communication with AT (series and invoices)

Multiple accounts under the same login

Import of clients and items

Import of previous invoices from the Tax Authority portal

Import of previous invoices from the Tax Authority portal

Import of clients and items

Your logo on invoices

Send invoices by email

Multiple accounts under the same login

Export to SAF-T and excel

Management & Access

Discover advanced features in paid plans.

Invoice issuing via WhatsApp (voice and text)

Scheduled invoices

Automatic VAT rate suggestion on invoices

Digital document archive

Multi-user access

Multi-user access

Three simple plans

VAT Exempt

Subject to VAT

For sole traders under VAT exemption (art.53º/art.9º)

FIZ Base

Invoicing

0

€

FIZ Auto

FIZ Base + Social Security

9

.99

€

FIZ Prime

FIZ Auto + AI Tax Assistant

14

.99

€

Learn more

Three simple plans

VAT Exempt

Subject to VAT

For sole traders under VAT exemption (art.53º/art.9º)

FIZ Base

Invoicing

0

€

FIZ Auto

FIZ Base + Social Security

9

.99

€

FIZ Prime

FIZ Auto + AI Tax Assistant

14

.99

€

Learn more

Rated ★ 4.8
on the App Store and Google Play

15,000+ independent professionals trust FIZ

Download on the App Store

Get it on Google Play

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.

Well Cardoso

Excellent! A very complete and free invoicing system. I recommend it!

Rated ★ 4.8
on the App Store and Google Play

15,000+ independent professionals trust FIZ

Download on the App Store

Get it on Google Play

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.

Well Cardoso

Excellent! A very complete and free invoicing system. I recommend it!

Frequently Asked Questions

Everything you need to know about FIZ

Everything you need to know about FIZ

Why choose FIZ for your invoicing?

  • Unlimited and free: use FIZ with no restrictions or hidden costs.

  • Simplify invoicing: intuitive and efficient invoice creation and management.

  • Automatic VAT calculation: ensure accuracy and compliance.

  • Automatic submission to the Tax Authority: no manual work on the AT portal.

  • Integrated payment links: get paid faster via MBWay, Multibanco, Visa, or Mastercard.

  • Attractive invoice design: impress clients with a professional look.

Why choose FIZ for your invoicing?

  • Unlimited and free: use FIZ with no restrictions or hidden costs.

  • Simplify invoicing: intuitive and efficient invoice creation and management.

  • Automatic VAT calculation: ensure accuracy and compliance.

  • Automatic submission to the Tax Authority: no manual work on the AT portal.

  • Integrated payment links: get paid faster via MBWay, Multibanco, Visa, or Mastercard.

  • Attractive invoice design: impress clients with a professional look.

Is FIZ really free?

Is FIZ really free?

Who can use FIZ?

Who can use FIZ?

Are FIZ invoices certified by AT standards?

Are FIZ invoices certified by AT standards?

Can I customize my invoices?

Can I customize my invoices?

What do I need to start using FIZ?

What do I need to start using FIZ?

Do I need an accountant to use FIZ?

Do I need an accountant to use FIZ?

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AT № 3041

NIPC 517696835

1200-082, Lisbon, Cais do Tojo 24

Invoicing

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For Accountants

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