The compromis de vente (in French-speaking Belgium) or verkoopovereenkomst (in Dutch-speaking Flanders) is the binding preliminary contract that commits both buyer and seller to a Belgian property transaction. It is typically signed 3–6 months before the final notarial deed (acte authentique / authentieke akte) and governs all terms: price, conditions, transfer date, and any included fixtures.
A critical difference from neighbouring France: Belgian law provides no statutory cooling-off period (délai de réflexion) for property buyers once the compromis is signed. The moment both parties sign, the contract is fully binding. This makes the pre-signing due diligence phase — reviewing planning status, checking for encumbrances, and confirming financing — absolutely essential.
The compromis must be notified to the relevant regional tax authority within 4 months of signing. In Wallonia and Brussels, this is the Administration du Cadastre; in Flanders, the Vlaamse Belastingdienst. This notification triggers the calculation and payment of registration duties (droits d'enregistrement / registratierechten). Failure to notify within the deadline results in penalties.
Standard protective clauses (conditions suspensives / opschortende voorwaarden) typically included are: subject to mortgage approval within a set period (usually 4–6 weeks), and subject to the buyer obtaining planning information confirming no violations. Sellers should provide all mandatory information certificates (renseignements urbanistiques) and soil contamination certificates before signing.
The compromis in Belgium is often drafted by the estate agent rather than the notaire, which adds risk. Agents are not legally trained in the same way as notaires, and agent-drafted compromis documents sometimes lack critical protective clauses. Always have a notaire or Belgian lawyer review any compromis before signing, particularly if you are an expat unfamiliar with Belgian regional property law.
| Key Facts: Compromis de Vente | |
|---|---|
| Binding effect | Immediately binding on both parties — no cooling-off period |
| Notification deadline | 4 months from signing to notify tax authority |
| Common conditions | Mortgage approval, planning certificate, soil certificate |
| Who drafts | Often estate agent — notaire review strongly recommended |
| Regional variation | Flanders, Wallonia, and Brussels each have different rules |
Frequently Asked Questions
Is there any right to withdraw after signing a Belgian compromis?
Belgian residential property law does not grant buyers a statutory cooling-off period as France does. However, if the seller provides materially false information or conceals known defects, remedies for misrepresentation (vices cachés / verborgen gebreken) remain available post-completion.
What happens if my mortgage is refused after signing the compromis?
If the compromis contains a valid mortgage condition (clause suspensive de financement), you may withdraw without penalty and recover your deposit. Without such a clause, you are bound to complete — potentially losing your deposit and facing damages claims for the full purchase price.
Do I pay registration duties on the compromis or the final deed?
Registration duties (droits d'enregistrement) are technically due on the final notarial deed, but the compromis notification triggers the process. Duties are calculated on the agreed price and must be paid within 4 months of the compromis signing — not at the later notarial deed date.
Part of the AvökatFinder Belgium Legal Glossary — plain-English definitions of Belgian legal terms for expats.