Edouard Hennin
CEO & founder — BailBelgique, Mon État des Lieux, indexation-loyer.be
About
I am Edouard Hennin, Belgian real estate expert since 2018. I daily accompany landlords and tenants in their procedures: lease drafting, inventory of fixtures, indexation, notification, EPC compliance. By answering the same questions year after year — "can we still index after five years?", "can the tenant refuse?", "what is the exact formula?" — I built the indexation calculator. The objective: that a calculation takes 30 seconds, not 30 minutes.
I founded BailBelgique (eIDAS electronic signature for Belgian leases) and Mon État des Lieux (dematerialised inventory of fixtures). Indexation-loyer.be completes this suite with a fair, up-to-date, free calculator, directly based on the health indexes published by Statbel — for the detail, see the calculation methodology.
All guide articles on this site are written and reviewed by me, by systematically cross-referencing legal texts (Law of 6 August 1993, Walloon decree of 2018, Brussels Housing Code) with my field practice. The articles are dated and regularly revised as case law and regulations evolve.
The articles published here are informative and do not constitute formal legal advice. For any disputed situation, I refer you to a lawyer or the justice of the peace of the property's commune (free procedure).
Areas of expertise
- Rent indexation in Belgium
- Statbel health index
- Belgian rental legislation
- Residential and commercial lease law
- Regional specificities (Wallonia, Brussels, Flanders)
- EPC and indexation framework
- Rental management
- Lease drafting and inventory of fixtures
- Belgian real estate taxation
- Tenant notification and recommended procedures
Articles published on indexation-loyer.be
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Can you index a rent without an EPC certificate in Brussels?
In Brussels, rent indexation is impossible without a valid EPC certificate provided to the tenant. 2026 rules, E-F-G correction factors and worked examples.
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Indexation of a 9-year lease in Belgium
The 9-year lease is the Belgian residential standard. How many indexations possible, how to calculate them, articulation with the 3-6-9 formula.
· Updated 10 Aug 2026 -
Indexation calculation error: how to correct it?
Wrong index base, forgotten month, ignored EPC coefficient: the 7 typical indexation errors and the step-by-step correction procedure.
· Updated 10 Aug 2026 -
Can a rent indexation be refused in Belgium?
Tenant or landlord, when is a refusal of indexation legitimate? List of valid and invalid grounds under Belgian law.
· Updated 10 Aug 2026 -
Indexation and co-tenancy: specific rules
Joint single lease, individual leases per room, co-tenancy pact: how indexation applies according to the chosen co-tenancy regime.
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EPC classes and indexation: complete tableau by class
Understand EPC classes (A, B, C, D, E, F, G) and their impact on rent indexation in Wallonia, Brussels and Flanders. Complete tableau.
· Updated 10 Aug 2026 -
I forgot to index for years: what to do?
Landlord, you discover you forgot to index your rent? Diagnosis, immediate action, template letter and tenant relationship management.
· Updated 10 Aug 2026 -
Is there a cap on rent indexation in Belgium?
Belgian law sets no federal percentage cap, but the limit comes from regional EPC coefficients. Detail by region and by class.
· Updated 10 Aug 2026 -
What does Belgian law say about rent indexation?
Complete tour of Belgian legislation on indexation: Civil Code art 1728bis, Law of 1993, RD of 1993, regional decrees. Sources and explanations.
· Updated 10 Aug 2026 -
Landlord rights regarding rent indexation
Complete inventory of the Belgian landlord's rights regarding indexation: index, waive, claim, contest. Legal sources and limits.
· Updated 10 Aug 2026 -
Contesting a rent indexation: recourses and procedure
Complete procedure to contest an indexation before the justice of the peace: deadlines, arguments, evidence to gather and concrete examples.
· Updated 10 Aug 2026 -
Indexation after an owner change: who can index?
Sale, inheritance, donation: what becomes of the indexation right when a rented property changes owner? Rules, dates and lease continuity.
· Updated 10 Aug 2026 -
Indexation managed by a real estate agency
Mandate, liability, cost and remedies: everything about indexation management by an agency on behalf of the landlord. And when to take over.
· Updated 10 Aug 2026 -
Is registered mail required to notify an indexation?
Registered mail is not legally mandatory in Belgium. Why it remains strongly recommended: evidence, costs, alternatives and case law.
· Updated 10 Aug 2026 -
Indexation regularisation: procedure
Error, omission, resolved disagreement: how to regularise a rent indexation in Belgium. Step-by-step procedure for landlord and tenant.
· Updated 10 Aug 2026 -
Retroactive rent indexation: rules and limits
What rules govern a retroactive indexation in Belgium? 3-month cap, recovery procedure, worked examples and risks.
· Updated 10 Aug 2026 -
Indexation of a short-term lease in Belgium
Lease ≤ 3 years: indexation rules, calendar, automatic switch to 9-year lease, practical cases for student rentals and transitions.
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Tenant rights facing an indexation
Verification, contestation, instalment plan: what the Belgian tenant can legally do facing an indexation request. Complete inventory.
· Updated 10 Aug 2026 -
When to notify the tenant of an indexation?
Belgium: no mandatory legal notice. But the optimal notification timing conditions legal security and the quality of the rental relationship.
· Updated 10 Aug 2026 -
Can a rent still be indexed after 5 years without indexation?
Have you forgotten to index your rent for several years? Here is what Belgian law says about catching up and prescription.
· Updated 10 Aug 2026 -
Indexation of commercial leases in Belgium
Indexation of commercial rents in Belgium: Law of 30 April 1951, contractual clauses, health index, differences with residential.
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How to calculate a rent indexation: step-by-step guide
Complete method to calculate a rent indexation in Belgium: legal formula, Statbel health indexes, worked examples by region, EPC coefficients.
· Updated 10 Aug 2026 -
How to notify the indexation to the tenant
Mandatory mentions, registered or simple, commented template: everything to correctly notify a rent indexation in Belgium.
· Updated 10 Aug 2026 -
The tenant refuses the indexation: what to do?
Your tenant disputes or refuses the rent indexation? Here are the legal remedies and the procedure step by step.
· Updated 10 Aug 2026 -
Unregistered lease: can it be indexed?
Without registration, indexation is not due. Here are the exact consequences and how to regularise a forgotten lease.
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When can a rent be indexed in Belgium?
Anniversary date, frequency, conditions: everything you need to know to know WHEN to index a rent in Belgium. Clear formula and examples.
· Updated 10 Aug 2026
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