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Abitos Immo & Advice

Tool for Flanders

Calculate your rent indexation

Simple, indicative and compliant with Flemish guidelines. Including EPC correction factor and graphical evolution over the term of your contract.

This tool works entirely client-side: no data is stored. You can optionally have a summary sent by e-mail.

All fields below are required.

When was the residential lease concluded? *

Rent as stated in the contract on the effective date, without later indexations.

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The EPC correction factor applies to contracts before 1 October 2022 with label D, E, F or no EPC.

Compliant with Flemish guidelines, indicative and without storing data.

Fill in your details

Your indexed rent and chart will appear here as soon as you click “Calculate”.

Paid service

A legally correct rent indexation letter, ready in 2 minutes

Enter your details and those of your tenant. We automatically draw up a personalised indexation letter for residential leases in Flanders and send it by e-mail.

  • Personal letter in the name of tenant and landlord
  • Compliant with Flemish rental law and the health index
  • Straight to your inbox as PDF, for just € 4.99

Fields marked with a * are required, the others may be left empty.

Landlord
Tenant
The rented property

Address of the rented property

Rental details

The rent may be indexed each year on the anniversary of the lease taking effect.

Secure payment via Mollie. Your letter is not shown in advance.

Background

How does rent indexation work?

In Flanders, a landlord may adjust the rent each year to the evolution of the Belgian health index. The calculation is based on a fixed formula and can be influenced by the property's EPC label.

Indexed rent = Base rent × (Reference index / Starting index)

EPC regulation timeline

  • Before 1 October 2022

    No EPC restriction on indexation.

  • 1 Oct 2022 to 30 Sep 2023

    Indexation freeze for labels E and F (full ban).

  • From 1 October 2023

    Indexation allowed again, but limited via an EPC correction factor for labels D, E, F and no EPC.

  • From 2028 (announced)

    New restriction: labels E and F no longer indexable.