Declaring property
you own abroad
Owning a house or flat back home does not stop mattering once you move to Belgium, but many newcomers do not realise it needs to be declared here. Declaring foreign property is usually straightforward, and thanks to tax agreements between countries, it rarely means paying tax twice.
This page explains what you need to declare, the deadlines that apply, why it matters, and where the income side is covered.
Overview
If you become a tax resident in Belgium, you generally need to declare your worldwide assets on your Belgian tax return - and property you own abroad is the most common one internationals forget. Declaring is mainly about transparency, not an extra tax bill, since agreements between countries are designed to stop the same income being taxed twice. The details can be technical, so it is worth getting them right rather than guessing.
What you need to declare
If you are a tax resident in Belgium, the foreign assets you may need to declare typically include:
- Real estate abroad - a house, flat or land you own outside Belgium, whether you rent it out or keep it for your own use. Belgium assigns your property a value (the kadastraal inkomen, or cadastral income) used in your tax return, you will be asked to provide details about the property so this can be set correctly.
- Foreign bank accounts - these involve two separate obligations: a one-time registration with the Central Point of Contact (CAP) at the National Bank of Belgium, and mentioning the account every year on your tax return. The CAP registration is not automatic, you have to do it yourself, at the latest when you file your first tax return.
- Some foreign insurance policies - certain life insurance policies held abroad also fall under declaration rules, and are ticked off annually on your tax return.
This page is about the assets you own. If you also earn income from abroad: such as rent, a salary or remote work for a foreign employer, that is covered separately on the Income from abroad page.
Deadlines that catch people out
- Foreign real estate must be reported to FPS Finance within 4 months of buying it (or of becoming a Belgian tax resident while owning it). You do this via MyMinfin or a paper form, after which FPS Finance assigns the cadastral income. Missing this deadline can mean a fine of €250 to €3,000 — for something that usually costs nothing to declare on time.
- Foreign bank accounts should be registered with the CAP before or at the latest when you file your tax return for the year you opened or brought them.
Why declaring is not double taxation
Being asked to declare foreign property understandably worries people who fear being taxed on it twice, once abroad and once in Belgium. In most cases this does not happen. Belgium has double taxation agreements with many countries, which decide which country has the right to tax what. For real estate, that is almost always the country where the property is located.
One honest nuance: exempt foreign income can still count for the progression reserve (progressievoorbehoud) - it is not taxed itself, but it can nudge the tax rate applied to your Belgian income slightly upward. So the property is declared in Belgium for transparency, the actual taxation follows the agreement, and a second full tax bill is avoided, but "declared" does not always mean "completely without effect".
The way this works depends on the specific country and the type of asset, so the safe approach is to declare correctly and check how the agreement applies to your situation.
Where to get it right
Foreign property declarations can get technical quickly, especially around how the value is set and how a tax treaty applies. The Federal Public Service Finance (in Dutch: FOD Financiën) is the authority for this, and its pages explain how to declare foreign property and cadastral income. The property declaration itself can be done via MyMinfin or by email to foreigncad@minfin.fed.be
IHWF is not a tax adviser and cannot complete your declaration or tell you how much you will owe. For anything beyond the basics, especially a complex situation, it is worth speaking to a tax adviser or contacting FPS Finance directly.
Good to know: declare your foreign property from the start, even if you are confident no tax will be due on it. The declaration itself is usually the obligation - leaving it out, rather than paying tax on it, is what tends to cause problems later.
Sources
- Cadastral income - property abroad (FPS Finance)
- Kadastraal inkomen - buitenland (FOD Financiën)
- Onroerende inkomsten - buitenland (FOD Financiën)
- National Bank of Belgium — Foreign accounts (CAP)
(card reader)
