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Rent indexation in Belgium in 2025

Month by month, the health index a landlord in Belgium uses for a lease anniversary in 2025, and the regional rule that applies on top.

Anniversary monthIndex month to useHealth index (base 2013)Over 12 months
January 2025December 2024133.73+3.24 %
February 2025January 2025135.52+4.09 %
March 2025February 2025135.79+3.70 %
April 2025March 2025135.91+3.16 %
May 2025April 2025134.77+3.00 %
June 2025May 2025134.54+2.37 %
July 2025June 2025135.04+2.37 %
August 2025July 2025135.60+2.08 %
September 2025August 2025135.64+2.03 %
October 2025September 2025135.26+2.15 %
November 2025October 2025135.76+2.11 %
December 2025November 2025136.49+2.45 %

Months missing at the end of the table are those whose index Statbel has not published yet. Figures read on September 30, 2026.

20242026

Same year, other regions:

BrusselsFlandersWallonia

The rule in Belgium

The energy-performance corrections below depend on the anniversary month; open a month of 2025 above for its exact factors.

Brussels, PEB E, F or G on a lease in force before 14/10/2022

The indexed rent is multiplied by the official correction factor the Region publishes for the anniversary month, one row per month, one column for E, one for F/G (Code bruxellois du Logement, art. 224/2). The calculator carries the current table. Since 1 January 2025 the lease must also be registered with Bruxelles Logement, or no indexation is due at all.

Flanders, EPC D, E or F on a lease in force before 01/10/2022

Between 01/10/2022 and 30/09/2023 Flanders indexed label D at 50 % and E/F not at all, and forbids catching up afterwards (decree of 3 October 2022, art. 4). Every later indexation is multiplied by a factor built from the health index of that frozen year. For a lease whose anniversary falls in this month:

Wallonia, PEB D, E, F or G on a lease in force before 01/11/2022

Between 01/11/2022 and 31/10/2023 Wallonia indexed PEB D at 75 %, E at 50 % and F/G not at all; since 01/11/2023 the base rent and base index are those of that capped year, so the lost share is never recovered (decree of 19 October 2022). Expressed as a factor on a full indexation, for a lease whose anniversary falls in this month:

Labels A to C, and every lease signed since autumn 2022

Indexed in full, on the formula above. The only conditions left are the national ones: a registered lease, a certificate handed to the tenant, a written request.

Your rent, your dates, the exact figure

The free calculator applies the formula, the regional correction and the three-month cap to your lease, and emails you the letter to send.

Open the calculator →

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