Where do you take out the mortgage?
Most Dutch lenders do not finance a home abroad. In practice you therefore borrow from a Belgian bank or through an adviser specialising in cross-border mortgages. Belgian banks look at your income, your own contribution and the value of the home. They generally ask for more of your own money than you may be used to in the Netherlands: expect to fund the purchase costs and part of the purchase price yourself.
A Belgian mortgage usually has a fixed rate for the whole term, or a variable rate with fluctuations capped by law. Repayment is almost always by annuity. Outstanding-balance insurance (schuldsaldoverzekering) is customary.
Tax on your income
If you live in Belgium and are employed in the Netherlands, you are a cross-border worker. Under the tax treaty between the two countries your salary is as a rule taxed in the country where you work, so in the Netherlands. In Belgium you file a return as a resident; the Dutch income is exempt there, but counts towards the rate on any other income and towards the municipal tax.
For entrepreneurs and owner-directors it is more complex. Where your company is actually managed, how you pay yourself and where you work determine which country may tax you. Have this worked out before the move.
Mortgage interest relief
As a resident of Belgium you can be treated in the Netherlands as a qualifying non-resident taxpayer, if virtually all (at least 90%) of your income is taxed in the Netherlands. In that case you can deduct the interest on your own home in Belgium in your Dutch tax return, under the same conditions as in the Netherlands. Flanders itself no longer offers a housing bonus (woonbonus) for new loans.
Assets
Belgium has no wealth tax on a notional return like the Dutch box 3. After emigrating, your savings and investments no longer fall under box 3, except for property you keep in the Netherlands. Belgium does have its own levies, such as withholding tax on interest and dividends and a tax on larger securities accounts.
Health insurance and social security
You are socially insured in the country where you work. If you work in the Netherlands, you keep your Dutch health insurance and continue to build up Dutch state pension (AOW) and occupational pension there. With a treaty form from your health insurer you register with a Belgian health fund, so that you receive care in Belgium too. Family members can be co-insured under certain conditions.
Car, driving licence and practical matters
After registering in Belgium your car must be put on Belgian plates, unless it is a company car from your Dutch employer, for which a separate arrangement applies. Your Dutch driving licence remains valid. Children can go to school in Belgium or stay at school in the Netherlands.
Do the sums first, then buy
The overall calculation differs from household to household. A meeting with an adviser for cross-border workers costs little in relation to a purchase of €1,095,000 and prevents surprises. Organisations such as Grensinfopunt and the Bureau for Belgian Affairs of the Dutch Social Insurance Bank (SVB) provide free general information.
Reference date: September 2026. This is general information, not personal advice. Rates and conditions change; have your situation checked by your notary or adviser.
