Tax residency after relocating: the mistakes that cost families most

The scenario repeats from family to family. A move, a rented apartment, a local bank account, a school near the new home. A year later comes the realization that the family has become a tax resident of a country with a rate that climbs above forty percent, and worldwide income — not just what's earned locally — is now taxed.

How residency is determined

Everyone knows the 183-day rule, and that's exactly why it's the most common trap: it isn't the only test. Most developed countries apply a combination of criteria:

• Physical presence — the number of days in a calendar or tax year.
• A permanent home — available to you to live in on an ongoing basis, whether owned or rented.
• Center of vital interests — where the family lives, where the children go to school, where the main economic ties are.
• Habitual abode — where you're regularly found, even if formally it's less than half the year.

The most underrated test on this list is the child's school. It's the clearest marker of a center of vital interests: it shows the family lives here, rather than just visiting.

Why "I live between two countries" doesn't work

Trying not to be a resident anywhere usually ends with you becoming a resident of both countries at once. From there, the matter is settled under a double-tax treaty — if one exists and is in force. If there is no treaty, or it has been suspended, both countries treat you as their own, and tax gets paid twice, in full.

This is exactly what happened to people who spent years living in countries whose treaties were suspended: a structure that had worked for decades stopped working overnight.

What to decide before you move

1. Where you will be a tax resident. This is a decision, not a byproduct of circumstances.
2. How your income will be taxed. Salary, dividends, capital gains, rental income and income from asset sales are all taxed differently, and the "low rate" advertised for a country usually applies to just one type of income.
3. Whether a treaty is in force between your old and new country, and what it says about specific types of income.
4. What happens to your assets on exit. Some countries apply an exit tax, and that's a separate calculation.
5. What notifications you're required to file. Opening accounts, holding shares in foreign companies, a change of status — failure to file is fined regardless of whether there was any income.

Special regimes: run the numbers, don't take them on faith

Certain countries offer preferential regimes for new residents: a flat tax, reduced rates for specific activities, an exemption on foreign income for several years. These are real tools, but each has entry conditions, a limited duration, and presence requirements. The regime a real-estate salesperson describes and the regime written into the tax code are often two different things.

Status and taxes are not the same thing

A residence permit doesn't by itself make you a tax resident. But programs aimed at remote workers are often structured so that residency kicks in automatically — that's the point of them from the host country's perspective. Keep the two apart: status that gives you the right to be there, and status that pulls you into local taxation.

Bottom line

Tax residency isn't a side effect of relocating — it's the central parameter of the move. It has to be worked out before renting an apartment and before choosing a school, because after those two steps, the choice has already been made. This material is for informational purposes only and does not replace advice from a tax professional.