Tax residence and immigration residence are not the same thing

People going through an international move often assume that, once they obtain a visa or residence permit, they automatically stop being tax residents in their home country and become tax residents in the destination country. That assumption is one of the most common causes of tax problems in international moves.

Immigration residence answers one question: does the person have legal authorization to live in that territory? Tax residence answers a completely different one: under that tax system's own criteria, in which jurisdiction must this person declare — and potentially pay tax on — their worldwide income or part of it?

The criteria used to answer each question belong to different branches of law, applied by different authorities, with different deadlines and consequences. It is entirely possible to be an immigration resident in one country while remaining a tax resident in another — or even to be considered a tax resident of more than one place at the same time.

Each jurisdiction defines its own tax residence criteria, which may include, among other factors: time physically spent in the territory over the year, availability of a habitual dwelling, center of vital and economic interests, family ties, and formal declarations of intent to reside. None of these criteria work in isolation — it's usually the combination that determines the outcome.

Someone might obtain a residence permit in Portugal, for example, spend most of the year in Brazil for professional or family reasons, and still be classified as a Brazilian tax resident — with all the reporting obligations that entails — even while holding a valid Portuguese residence title.

• People who maintain an available habitual dwelling in more than one country at the same time.
• Professionals working remotely for an employer in one country while physically living in another.
• Families whose members end up residing in different jurisdictions during a relocation process.
• Business owners with shareholdings and a center of economic interests in a country other than their intended domicile.
• People in the visa process who have not yet formally completed their tax exit from the origin country.

When two jurisdictions simultaneously consider the same person a tax resident, there can be exposure to taxation on the same income in both countries. International agreements between some countries address this conflict through tie-breaker rules, but their application depends on the specific case and on whether such an agreement is in force between the countries involved.

The residence title in a passport does not, by itself, determine where someone must file their income tax return.

1. 01Check the tax residence criteria in force in both the origin and destination countries.
2. 02Formally document the tax exit from the origin country, where applicable, following the correct local procedure.
3. 03Determine whether a double-taxation agreement exists between the countries involved and how it treats the specific case.
4. 04Reassess the situation annually, since time spent and ties can change the classification from one year to the next.
5. 05Align the tax return with the actual immigration and residence status, avoiding automatic assumptions.

This kind of analysis usually involves more than one area of law and, frequently, more than one jurisdiction at once — so it shouldn't be based solely on generic guidance found in forums or social media.