Brazilians are the largest foreign community in Portugal, and the shared language makes the move much easier. The tax side, though, has its own rules in each country. Planning it before you leave avoids double taxation and surprises with the Receita Federal or the Portuguese Tax Authority.
Before you leave Brazil
If you are leaving Brazil for good, you need to tell the Receita Federal: first with the Comunicação de Saída Definitiva do País, then with the Declaração de Saída Definitiva. Until you do, Brazil may keep treating you as resident and taxing your worldwide income. Bring documents on your income, pensions and assets too.
Arriving in Portugal
In Portugal, start with the NIF, register with Social Security and, once you are resident, update your address with the Tax Authority. If you will work here, we register you as self-employed or set up your company. Portugal and Brazil have a convention to avoid double taxation and a social security agreement that lets contributions made in both countries count together.
Income that stays in Brazil
Rent, investments or pensions received in Brazil go into your Portuguese tax return once you are resident. The convention decides where each type of income is taxed, and tax paid in Brazil can generally be credited in Portugal. If you work in a qualifying profession, IFICI may also apply.