Is a verbal lease valid in Belgium?
Is an oral lease legally valid in Belgium? Consequences, evidence, tenant's and landlord's rights. Why you should always use a written lease.
Legal validity of the oral lease
In Belgian law, the lease is a consensual contract: it is formed by the simple agreement of the parties on the rented property and the price. Writing is not a condition of validity — an orally concluded lease is therefore legally valid.
However, the absence of writing has important consequences:
- The lease is automatically considered a 9-year lease (3-6-9)
- Registration with the FPS Finance is impossible (no document to register)
- Proof of the lease’s contents is difficult in case of dispute
All three Belgian Regions require writing for primary residence leases (Brussels: ordinance of 27 July 2017, Wallonia: decree of 15 March 2018, Flanders: Woninghuurdecreet 2019). But the absence of writing does not make the lease void — it simply makes it harder to manage.
Practical consequences
For the tenant
| Advantage | Disadvantage |
|---|---|
| 9-year lease by default (maximum protection) | Impossible to prove agreed conditions |
| Same rights as a written lease | No registration = no protection in case of sale |
| Identical termination compensation | No specific clauses (insurance, pets, etc.) |
For the landlord
| Advantage | Disadvantage |
|---|---|
| None | Impossible to impose specific conditions |
| No registration = possible penalties | |
| Presumed 9-year lease = long duration | |
| Difficult to prove the agreed rent amount |
Without registration, the lease is not enforceable against a third-party buyer. If the landlord sells the property, the new landlord may evict the tenant without respecting the 3-6-9 lease deadlines.
How to prove an oral lease
In case of dispute, the burden of proof falls on the person invoking the lease. Here are the elements accepted by the Justice of the Peace:
- Bank transfers with the mention “rent” or “rental” — this is the strongest proof
- Written exchanges: SMS, emails, WhatsApp messages mentioning the rental
- Address registration: residence certificate at the property address
- Bills: water, gas, electricity in the tenant’s name
- Testimonies: neighbours, family, colleagues (subsidiary evidence)
- Property inventory: even informal, it proves the existence of a rental relationship
The Justice of the Peace has sole discretion in assessing the probative value of each element. A body of concordant evidence is generally sufficient.
Why always prefer writing
A written lease is essential to:
- Clearly establish the rent, charges and conditions
- Register the lease (free and mandatory)
- Protect the tenant in case of sale
- Provide for insurance, rental deposit and maintenance clauses
- Facilitate dispute resolution
If you currently have an oral lease, it is never too late to regularise. Both parties have an interest in formalising the relationship in writing.
To create a compliant written lease in minutes, use our online lease generator. The document is compliant with all three Regions and includes all mandatory clauses. For more information, consult our guide on residential leases in Belgium.