Rent indexation in Brussels in 2025
Month by month, the health index a landlord in Brussels uses for a lease anniversary in 2025, and the regional rule that applies on top.
| Anniversary month | Index month to use | Health index (base 2013) | Over 12 months |
|---|---|---|---|
| January 2025 | December 2024 | 133.73 | +3.24 % |
| February 2025 | January 2025 | 135.52 | +4.09 % |
| March 2025 | February 2025 | 135.79 | +3.70 % |
| April 2025 | March 2025 | 135.91 | +3.16 % |
| May 2025 | April 2025 | 134.77 | +3.00 % |
| June 2025 | May 2025 | 134.54 | +2.37 % |
| July 2025 | June 2025 | 135.04 | +2.37 % |
| August 2025 | July 2025 | 135.60 | +2.08 % |
| September 2025 | August 2025 | 135.64 | +2.03 % |
| October 2025 | September 2025 | 135.26 | +2.15 % |
| November 2025 | October 2025 | 135.76 | +2.11 % |
| December 2025 | November 2025 | 136.49 | +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.
Same year, other regions:
The rule in Brussels
The energy-performance corrections below depend on the anniversary month; open a month of 2025 above for its exact factors.
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.
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.
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