The practical guide to rent indexation
Everything you need to know to calculate, notify, contest or recover a rent indexation in Belgium. Articles written and reviewed by Edouard Hennin, Belgian real estate expert since 2018, sourced from legal texts and updated regularly.
- Brussels
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.
- National
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.
- National
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.
- National
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.
- National
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.
- National
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.
- National
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.
- National
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.
- National
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.
- National
Landlord rights regarding rent indexation
Complete inventory of the Belgian landlord's rights regarding indexation: index, waive, claim, contest. Legal sources and limits.
- National
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.
- National
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.
- National
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.
- National
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.
- National
Indexation regularisation: procedure
Error, omission, resolved disagreement: how to regularise a rent indexation in Belgium. Step-by-step procedure for landlord and tenant.
- National
Retroactive rent indexation: rules and limits
What rules govern a retroactive indexation in Belgium? 3-month cap, recovery procedure, worked examples and risks.
- National
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.
- National
Tenant rights facing an indexation
Verification, contestation, instalment plan: what the Belgian tenant can legally do facing an indexation request. Complete inventory.
- National
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.
- National
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.
- National
Indexation of commercial leases in Belgium
Indexation of commercial rents in Belgium: Law of 30 April 1951, contractual clauses, health index, differences with residential.
- National
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.
- National
How to notify the indexation to the tenant
Mandatory mentions, registered or simple, commented template: everything to correctly notify a rent indexation in Belgium.
- National
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.
- National
Unregistered lease: can it be indexed?
Without registration, indexation is not due. Here are the exact consequences and how to regularise a forgotten lease.
- National
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.
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