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For TI / ENI

Social Security

VAT

Tax Shield

Plans

For Companies

For Accountants

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Aderir ao FIZ

Social Security automatically calculated and filed.

Review once — we submit error-free, expert-verified, and with a tax guarantee up to 1.500€

Get started now

Built for self-employed professionals (Sole Traders & Independent Entrepreneurs) providing services in Portugal.

№ 3041

Certified by the Portuguese Tax Authority

10.000+

satisfied self-employed professionals

24/7

instant support

Never miss a deadline

FIZ tracks every tax deadline, sends smart reminders, and notifies you about what matters. No surprises, no fines, no stress.

Try now

Benefits of automatic Social Security calculation & filing with FIZ

Expert verified!

Automatically calculates your contribution base

Lets you adjust your base (-25% / +25%)

Eliminates the risk of errors or late penalties

Sends smart reminders before every deadline

Submits directly to Social Security

Files your declaration in just 1 click

Tax Guarantee — up to 1.500€ covered per declaration

Plans

FIZ Base

0 €

forever

Tax Shield

Not included

FIZ Auto

Most Popular

9,99 €

per month, including VAT

Tax Shield

Protection up to 500€ guaranteed per declaration

FIZ Prime

14,99 €

per month, including VAT

Tax Shield

Protection up to 1.500€ guaranteed per declaration

FIZ Base

0 €

forever

Tax Shield

Not included

FIZ Auto

Most Popular

9,99 €

per month, including VAT

Tax Shield

Protection up to 500€ guaranteed per declaration

FIZ Prime

14,99 €

per month, including VAT

Tax Shield

Protection up to 1.500€ guaranteed per declaration

FIZ Base

0 €

forever

Tax Shield

Not included

FIZ Auto

Most Popular

9,99 €

per month, including VAT

Tax Shield

Protection up to 500€ guaranteed per declaration

FIZ Prime

14,99 €

per month, including VAT

Tax Shield

Protection up to 1.500€ guaranteed per declaration

Learn more

Tax Shield

Accuracy guaranteed with real money

Our automatic tax engine is built for total accuracy — and we back it with a real monetary guarantee. Every declaration is protected with up to 1.500€, depending on your plan. Full confidence. Zero worries.

See Plans

Frequently Asked Questions

Do I still need an accountant?

Not necessarily. With FIZ, all declarations are already calculated and submitted automatically. If you want, you can still share them with your accountant — but it’s optional.

Do I still need an accountant?

Not necessarily. With FIZ, all declarations are already calculated and submitted automatically. If you want, you can still share them with your accountant — but it’s optional.

Do I still need an accountant?

Not necessarily. With FIZ, all declarations are already calculated and submitted automatically. If you want, you can still share them with your accountant — but it’s optional.

I forgot my Social Security password. What should I do?

I forgot my Tax Authority (AT) password. What should I do?

Can I cancel my subscription at any time?

AT № 3041

NIPC 517696835

1200-082, Lisbon, Cais do Tojo 24