Guide: rent indexation from A to Z

Short, practical articles — each with a direct link to the calculator or the letter generator.

Sample rent indexation letter for Belgium: free template + explanation

Free sample letter to notify your tenant of the rent indexation, with the mandatory details and the legal formula. Automatic letter generator included.

When can you index the rent in Belgium? (deadlines and rules 2026)

From when can you index the rent, how often is it allowed, and how far back does an indexation work? The rules for Flanders, Brussels and Wallonia at a glance.

EPC label and rent indexation in Flanders: the correction factor explained

For Flemish leases from before 1 October 2022 with EPC label D, E or F, a permanent correction factor applies to indexation. Here is how the calculation works.

Checking or disputing a rent indexation as a tenant in Belgium

Received an indexation letter? Here is how to check whether the amount is correct, and how to respond properly if the calculation is wrong or the indexation is not allowed.

Rent indexation in Brussels: registration, EPB and correction factors

In the Brussels Region you may only index the rent with a registered contract and a presented EPB certificate. Here is how the calculation works, including the correction factors for labels E, F and G.

What is the Belgian health index? (and why your rent rises with it)

The health index determines the indexation of rents, wages and benefits in Belgium. What does it contain, who calculates it, and where do you find the current figures?