Selling Belgian Property Before Emigration 2026: Capital Gains, Registration Duties and Main Home

What changes in 2026: speculation rule modernised

Article 90, 10 WIB/CIR remains the key provision: a 16.5% federal speculation tax applies to the capital gain on a Belgian-situated immovable property sold within 5 years of acquisition, when the property is not your principal residence. The 2026 reform introduces electronic notification of the gain via MyMinFin (mandatory from 1 March 2026), eliminating the paper form 276.5 in most situations. Communal surcharges (gemeentebelasting / additionnels communaux) of 6-9% on the federal tax bring the effective rate to roughly 17.5-18%.

Belgium is a federal state with three Regions, but the speculation tax is federal — same rule in Flanders, Wallonia and Brussels. What differs by Region is the registration duty on the buyer side, which influences your sale price negotiation: 3% in Flanders for owner-occupier under EUR 285,000 (2026), 12.5% in Wallonia and Brussels (with reductions for first-time buyers).

The principal residence exemption: how it works

Article 7, paragraph 1 WIB exempts the gain on the property that was your enige eigen woning / unique habitation propre during a continuous period of at least 12 months in the 18 months preceding the sale. Up to 6 months of vacancy between leaving and selling is tolerated. The exemption is automatic — no claim needed — provided the cadastral records confirm domicile registration.

For emigrants, the timing matters. If you sell within 6 months of emigration, the exemption applies because the home was still your principal residence during the qualifying period. If you sell later, you must show that the property was either uninhabited or rented under a short-term arrangement that did not change its character. Long-term rental disqualifies the exemption.

Steps from listing to acte authentique

1. Mandate an immobilien makelaar / agent immobilier registered with BIV (Beroepsinstituut van Vastgoedmakelaars) or IPI (Institut Professionnel des Agents Immobiliers). Standard commission: 2-3.5% + VAT. The mandate may be exclusive (3 months) or non-exclusive.
2. Order the mandatory pre-sale documents: EPC certificate (energy), electrical inspection report, soil certificate (Vlaamse Bodemattest / certificat sol), urbanism certificate (stedenbouwkundige inlichtingen / renseignements urbanistiques), asbestos inventory (mandatory in Flanders since 2022 for buildings before 2001).
3. Sign the compromis de vente / verkoopcompromis at the notary or agency. The buyer typically pays 5-10% deposit. Suspensive condition for buyer’s mortgage is standard (4-6 weeks).
4. Pay registration duty / btw on the sale: the buyer pays Regional registration duty (3% / 12.5%) or 21% VAT for new builds. The seller does not pay registration duty.
5. Sign the acte authentique / authentieke akte at the notary within 4 months. The funds are wired the same day. The notary withholds the speculation tax (if applicable) and remits to FOD Financien / SPF Finances.

Calculation of the speculation tax

Capital gain = sale price – (acquisition price + acquisition costs + works actually carried out).

• Acquisition price: as in the original deed.
• Acquisition costs: registration duty paid by you, notary fees, mortgage costs — typically 12-17% of the original price.
• Works: only invoiced and traceable improvements, not maintenance. Keep all invoices for 5+ years.
• Indexation: from 2026 the gain is no longer indexed for inflation under the speculation tax (it was previously indexed by 5% per year held).

The notary calculates the tax automatically and withholds it from the sale proceeds. You file the corresponding form via MyMinFin within 30 days of signing the acte. No further action is needed if the withholding matches.

Holding period table: what you owe at exit

Selling from abroad: practical logistics

You can sign the acte authentique from your new country via:

• Procuration / volmacht by Belgian notary act — sign once at any Belgian consulate or via apostille from the foreign notary. Most common, EUR 250-500.
• Online video acte (Royal Decree of 30 April 2020): possible for any deed since 2022. The notary connects via secure video, the parties sign with eID or itsme. Available in Flanders, Wallonia and Brussels.
• Travel back for signature: 1-day round trip to Brussels or your Belgian notary city, often easier when complex clauses are involved.

Funds wire to a foreign account: provide the IBAN to the notary at compromis stage. Notaries are required to check anti-money-laundering compliance — expect an extra 3-5 days for cross-border verification with the Cellule de Traitement des Informations Financieres (CTIF).

Coordination with new country

Even after Belgian taxation is settled, your new country may also tax the worldwide gain (e.g. Spain, France, Netherlands). Use the double-taxation treaty: most apply article 13 OECD (gain taxable in the country where the property is located, i.e. Belgium). Where double taxation arises, claim the foreign tax credit (FTC) in your new country, providing the Belgian notary statement of withholding and the MyMinFin filing confirmation.