Scope of application
The Belgian commercial lease law is the Act of 30 April 1951 on commercial leases, still in force today. This federal legislation governs all relations between landlord and commercial tenant. For a general overview, see our commercial lease hub.
The Act of 30 April 1951 applies to any commercial lease agreement for premises used primarily to operate a retail or artisanal business with direct contact with customers. It also covers certain liberal professions that are comparable to trade.
Leases excluded from the scope: residential leases (governed by regional decrees), office leases without customer contact, agricultural leases, and short-term leases of less than 1 year (pop-up shops).
A commercial lease in Belgium that meets these criteria automatically benefits from the protective rules, even if the contract does not mention them explicitly. Clauses that conflict with the law are deemed unwritten.
Civil Code and commercial leases
The 1951 Act supplements the Belgian Civil Code. The general lease provisions of the Civil Code (articles 1709 et seq.) remain the default framework. The 1951 Act provides a specific regime that takes precedence over the general rules for commercial leases.
In practice: a commercial lease first follows the Act of 30 April 1951; where the Act is silent, the Civil Code applies; public-order rules of the 1951 Act cannot be waived by contract. This hierarchy is standard in Belgian law for protective legislation.
Duration and renewal (articles 3 to 14)
Article 3 of the Act sets the minimum duration at 9 years, calculated from the entry into force of the contract. The tenant may terminate at each triennial period (3 and 6 years) with 6 months’ notice sent by registered letter.
Articles 13 and 14 govern the renewal request. The tenant must notify the landlord by registered letter or bailiff’s writ, between 18 and 15 months before the end of the lease, of their wish to renew. The landlord has 3 months to respond.
Renewal is a right, not a favour. Only 4 legal grounds allow the landlord to refuse:
- Genuine personal occupation (article 16.I.1).
- Reconstruction of the building (16.I.2).
- Serious breach by the tenant (16.I.3).
- An insurmountable higher offer from a third party (16.I.5).
See commercial lease duration for detailed calculations.
Rent indexation (article 6)
Commercial lease rent indexation is governed by article 6 of the Act. It applies only if the contract expressly provides for it — unlike residential leases where it is the landlord’s right by default.
The indexation formula is:
Base rent x (new index / base index)
- Base index = the health index for the month preceding the signing of the lease.
- New index = the health index for the month preceding the anniversary date of the lease taking effect.
Index fluctuations directly affect the rent amount. There are no EPC-related caps for commercial leases (unlike residential leases since 2022). Indexation is notified by ordinary written notice — no registered letter required.
For more detail: rent indexation hub.
Triennial rent revision
Articles 6bis et seq. allow a rent revision beyond indexation. Every 3 years, either party may apply to the Justice of the Peace for a revision if economic circumstances have changed significantly.
Conditions: application to the Justice of the Peace, a minimum 15% change in market rent, and comparative evidence (similar rents in the area). The judge may increase, decrease or maintain the rent.
Assignment and subletting (articles 10 and 11)
Article 10 authorises the assignment of a commercial lease in connection with the sale of the business as a going concern. The landlord cannot oppose the assignment except on serious and specific grounds. The assignor remains jointly liable with the assignee for the remaining term of the lease.
Article 11 regulates subletting. It is permitted only for part of the premises and with the landlord’s express consent. Any irregular subletting is grounds for termination.
Renovations and alterations (articles 7 to 9)
The tenant may carry out alterations useful for their business, unless the landlord raises a reasoned objection. Major works require the landlord’s written consent or authorisation from the Justice of the Peace.
At the end of the lease, alterations may either be retained (with compensation paid to the tenant) or removed at the tenant’s expense. The outcome depends on the initial agreements.
Early termination
Outside of triennial periods, terminating the lease early is restricted. Possible grounds:
- Mutual agreement formalised in writing.
- Serious breach justifying judicial termination.
- Total destruction of the property (force majeure).
- Economic force majeure recognised by the court.
Without valid grounds, a unilateral early termination exposes the party concerned to contractual liability and damages.
Eviction compensation (articles 25 to 29)
If the landlord refuses renewal without a legal ground, or for stated reasons that are subsequently not carried out, the tenant is entitled to eviction compensation:
| Situation | Compensation |
|---|---|
| Non-renewal without a specified ground | 1 year’s rent |
| Reconstruction not carried out | 2 years’ rent |
| Bad faith proven | Up to 3 years’ rent |
This compensation offsets the loss of the business goodwill.
Law-compliant templates
Our commercial lease template incorporates all the provisions of the 1951 Act. A compliant PDF covers the essential points: duration, indexation, assignment and renewal.
For a ready-to-use template, see our dedicated page. Whether you search for a commercial lease agreement, a commercial lease template or a commercial lease PDF, they all refer to the same document.
PDF template: commercial lease PDF template.
Recent case law
The Belgian Court of Cassation has confirmed several key principles: “direct contact with customers” remains the central criterion (Cass. 2021), the right to renewal cannot be waived by contract (public order), and eviction compensation remains due even where the ground cited is genuine but not decisive. This case law reinforces the protection afforded to commercial tenants.
Justice of the Peace jurisdiction
All disputes relating to a commercial lease fall within the jurisdiction of the Justice of the Peace for the canton where the property is located. The procedure is simplified, legal representation is not required, and costs are limited (EUR 50-200).
Common types of disputes: refusal to renew, contested eviction compensation, refused assignment, unpaid rent, early termination and rent revision applications. See Justice of the Peace guide.
Relationship with residential leases
For a residential lease (standard tenancy, not commercial), the rules are different: the Act of 20 February 1991 (formerly federal) and regional decrees since 2014 for primary residence leases. Residential and commercial leases are clearly distinct.
A mixed lease (commercial and residential) follows the commercial lease rules if the commercial activity is predominant and involves direct customer contact.
Signature and formalities
A commercial lease may be signed by hand or with a qualified electronic signature (eIDAS). The signing of the contract triggers rights and obligations but does not replace registration.
Registration is strongly recommended — it provides a fixed date and enforceability against third parties (particularly in the event of a sale of the property). See commercial lease registration.
Commercial lease hub · Commercial lease duration · Registration · PDF template · Create a lease online · Rent indexation · Justice of the Peace.