Rent indexation in Brussels in 2025
Historical archive. In 2025, the EPC coefficient still applied for leases signed before 14 October 2022. For more recent leases: federal standard calculation.
In short (2025): in Brussels, two parallel regimes: leases pre-14/10/2022 → EPC coefficient still active; leases post-14/10/2022 → federal standard calculation.
Health indexes 2025 (Brussels = national, single index)
The health index is national — no Brussels variant. For 2025: progression from 135.52 to 136.69, that is +0.86 % over the year.
EPC coefficients applicable in 2025 (leases pre-14/10/2022)
Leases signed from 14/10/2022: 100% all classes. A valid EPC certificate provided to the tenant is required to index. Different percentages applied during the 2022-23 window.
These coefficients were still active in 2025 and remain so in 2026. The degressive mechanism over 12 months applied based on the lease's anniversary month.
Average increase 2025 in Brussels
For a Brussels rent of €950 (regional median) indexed in 2025:
- Lease pre-2022, EPC B (coef. 100 %): increase of ~€25-28/month
- Lease pre-2022, EPC E (coef. 75 %): increase of ~€18-21/month
- Lease pre-2022, EPC G (coef. 0 %): no indexation, rent frozen at €950
- Lease post-2022 (regardless of EPC): federal calculation, increase of ~€25-28/month
Verify a 2025 Brussels indexation
Our Brussels calculator automatically applies the historical EPC coefficient based on the signature date and indexation date. To verify a 2025 indexation:
- Enter the lease signature date (determines if the coefficient applies)
- Enter 2025 as the indexation year
- Select the property's EPC
- The calculator applies exactly the formula in force in 2025
Frequently asked questions — Brussels 2025
Did the EPC apply in Brussels in 2025? + −
Yes, for leases signed before 14 October 2022. In 2025, about 60 % of Brussels leases (the oldest ones) were still subject to the EPC coefficient.
Which coefficients applied in 2025? + −
EPC A to C: 100 %, EPC D-E: 75 %, EPC F-G: 0 %. Degressive mechanism over 12 months depending on the anniversary month (our calculator automatically applies the right value).
My Brussels lease was indexed in 2025, how to verify? + −
Use our Brussels calculator. Select the 2025 indexation date — it automatically applies the historical EPC coefficient in force on that date.
My lease has EPC G: no indexation possible in 2025? + −
For leases signed before 14 October 2022 with EPC G, the coefficient was indeed 0 % in 2025. No indexation was legally possible. An energy renovation upgrading the property to F or better unlocks the situation for future indexations.
Related pages
- Full guide: indexation in Brussels (current)
- Brussels calculator
- The EPC in Brussels
- Belgian recap 2025
- Comparison with Wallonia 2025
Archive — 2025 data frozen. Page kept as a historical reference.