The EPC and rent indexation in Brussels
Article 224/2 of the Brussels Housing Code, amended by the ordinances of 13 October 2022 and 13 October 2023, provides for an EPC correction factor that applies to Brussels leases that entered into force before 14 October 2022 (EPC E, F and G; 100 % for A-D). For more recent leases: ordinary formula without correction.
The legal framework
The ordinance of 13 October 2022 (published and in force on 14 October 2022) first temporarily limited indexation, from 14 October 2022 to 13 October 2023: 100 % for EPC A to D, a maximum of 50 % of the indexation for EPC E, no indexation for EPC F, G and properties without a certificate. The ordinance of 13 October 2023 (in force since 14 October 2023) then wrote the current correction factor, with no end date, into article 224/2 § 1/2 of the Brussels Housing Code. Reminder: in Brussels, no indexation is due without a registered lease and an EPC certificate provided to the tenant.
Pivot date: 14 October 2022
- Lease entered into force before 14/10/2022: correction factor applicable for EPC E, F and G (100 % for A-D)
- Lease entered into force from 14/10/2022 onwards: no factor, ordinary formula at 100 %
It is the lease's date of entry into force that counts, not the date of signature.
Brussels EPC coefficients
Leases taking effect from 14/10/2022: 100% all classes. A registered lease and a valid EPB certificate provided to the tenant are required to index. Different percentages applied during the 2022-23 window.
A factor that varies with the anniversary month
The current regime relies on official monthly tables: the applied correction factor depends on the anniversary month of the lease's entry into force (EPC E: 0.945–0.990; EPC F/G: 0.891–0.980; October is split into 1-13 and 14-31). The factor multiplies the full result of the ordinary formula, not just the increase.
Concretely: a lease whose anniversary date falls in March will not have exactly the same factor as a lease with an anniversary in September, even with the same EPC. The calculator automatically applies the right value — no need to consult a monthly table. The official table is published on be.brussels.
Worked examples
In Brussels, the starting index is that of the month before the signature of the lease; the new index is that of the month before the anniversary of its entry into force.
Case 1 — Lease entered into force in April 2021, EPC E
- Signed on 10 March 2021, entered into force on 1 April 2021 (before 14/10/2022 ✓) → correction factor applicable
- Base rent: €850 — indexation on 1 April 2026 — starting index (February 2021): 110.39; new index (March 2026): 137.78
- Ordinary formula: 850 × (137.78 ÷ 110.39) = €1,060.90
- E factor for April: 0.965766823
- Indexed rent: 1,060.90 × 0.965766823 = €1,024.58
Case 2 — Lease entered into force in December 2022, EPC E
- Signed on 8 November 2022, entered into force on 1 December 2022 (from 14/10/2022 onwards) → no correction factor
- Base rent: €850 — indexation on 1 December 2025 — starting index (October 2022): 127.92; new index (November 2025): 136.49
- Indexed rent: 850 × (136.49 ÷ 127.92) = €906.95
Case 3 — Lease entered into force in June 2021, EPC G
- Signed on 20 May 2021, entered into force on 1 June 2021 (before 14/10/2022 ✓) → correction factor applicable
- Base rent: €850 — indexation on 1 June 2026 — starting index (April 2021): 110.93; new index (May 2026): 139.22
- Ordinary formula: 850 × (139.22 ÷ 110.93) = €1,066.77
- F/G factor for June: 0.944248135
- Indexed rent: 1,066.77 × 0.944248135 = €1,007.30
- With an EPC E, the factor would be more favourable; with an EPC A to D, there would be no factor (100 %)
How to find your EPC in Brussels?
The EPC certificate is mandatory for any rental in Brussels. To find it:
- Check your lease (often attached as a copy)
- Contact the certified assessor who issued it (10-year validity)
- Check the public database of Brussels Environment
- Have a new certificate issued (€250-400 depending on surface)
Our dedicated guide: how to find your property's EPC.
Frequently asked questions — EPC Brussels
Which EPC coefficient applies to my Brussels lease? + −
For leases that entered into force before 14 October 2022: 100 % for EPC A-D; monthly correction factor for EPC E (≈0.945–0.990) and F/G (≈0.891–0.980) depending on the anniversary month. For leases that entered into force from 14 October 2022 onwards: no factor (ordinary formula at 100 %, regardless of EPC). During the temporary period from 14/10/2022 to 13/10/2023, different rules applied: 100 % for A-D, a maximum of 50 % of the indexation for E, no indexation for F, G and properties without an EPC.
Does the coefficient vary throughout the year? + −
Yes. The correction factor varies depending on the anniversary month of the lease's entry into force (official monthly tables; October is split in two). Our calculator automatically applies the right value.
My EPC is unknown: am I entitled to index? + −
No. Without a valid EPC certificate provided to the tenant, no indexation is due in Brussels — whatever the date of the lease. Having a new certificate issued (10-year validity) and providing it to the tenant unlocks the situation.
My property went from EPC G to E after renovation: what happens? + −
The correction factor depends on the EPC class: ≈0.945–0.990 for E, ≈0.891–0.980 for F/G, and no factor for A to D. For how a new certificate obtained during the lease is taken into account, refer to the official be.brussels page. In any case, a late request only reaches back to the 3 months preceding the month of the request.
Where do I check my property's EPC? + −
On the public database of Brussels Environment, or by contacting the certified assessor who issued your EPC.