My tenant asks for a rent reduction: how to respond?

January 2025 — the request

I am Laurent, 50, owner of a 2-bedroom flat in Forest since 2017. My tenant, Alain, 46, a technician at Proximus, has been living there with his partner for 3 years. Rent: EUR 900 per month, charges not included. Registered 3-6-9 residential lease.

On 10 January Alain sent me a polite but firm email. He requested a rent reduction of EUR 100 per month (from EUR 900 to EUR 800). His arguments:

1. His energy charges had doubled since he moved in (from EUR 120 to EUR 240/month)
2. The flat has an EPC label F — the insulation is poor, the windows are single-glazed
3. In Brussels, energy-inefficient properties are subject to indexation restrictions — he believed the rent was now above market for such a poorly insulated property

My first reaction: tension. EUR 100 per month means EUR 1,200 per year. My net rental yield is already tight. But Alain is a good tenant, and I knew he was not entirely wrong about the EPC.

January 2025 — the analysis

On 15 January, rather than responding in the heat of the moment, I did my homework:

Local market analysis: I checked listings for 2-bedroom flats in Forest. Rents varied between EUR 800 and EUR 1,050 depending on condition and EPC. For an EPC F, rents were around EUR 820-880. My rent of EUR 900 was at the high end for a poorly insulated property.

Void cost analysis: if Alain leaves, I lose:

• 2 months of void: EUR 1,800
• Paint refresh: EUR 600
• Advertising and management time: EUR 200
• Total: EUR 2,600 minimum

Indexation analysis: in Brussels, since 2025, I can no longer index the rent of an EPC F property. My rent is therefore frozen as long as I do not improve the EPC. Alain was right on this point.

On 22 January I calculated the impact of a EUR 50/month reduction (compromise): EUR 600 per year. Against EUR 2,600 cost if he leaves. The maths speaks for itself.

January 2025 — the negotiation

On 28 January I met Alain for a coffee in the flat. I presented my analysis transparently:

1. I acknowledged that the EPC F was a real handicap for him
2. I could not reduce by EUR 100 without jeopardising my return
3. I proposed a reduction of EUR 50/month (from EUR 900 to EUR 850), but temporary for 12 months
4. In exchange, I asked for a 3-year commitment (no departure before January 2028)

Alain thought it over. EUR 50 instead of EUR 100 was less than his request. But 3 years of stability had value for him too: no removal costs, no deposit to rebuild, no stress.

He counter-proposed: EUR 50 reduction but for 24 months instead of 12. I declined: the market could evolve, the EPC could improve if I carried out work. We agreed on 12 months renewable: at expiry, we would revisit based on the evolution of the EPC and the market.

February 2025 — the agreement

On 5 February we signed a lease addendum:

• Rent reduced from EUR 900 to EUR 850/month from 1 March 2025
• Duration of the reduction: 12 months (until 28 February 2026)
• Automatic return to EUR 900 on 1 March 2026, unless a new agreement
• Alain’s commitment to stay until 1 January 2028 at least
• Review clause: if the EPC improves (insulation work), the rent will be revised upwards accordingly

The addendum was annexed to the existing lease agreement and a copy was filed for registration.

Factual summary: 3 weeks of negotiation. EUR 50 monthly reduction, i.e. EUR 600 over 12 months. In exchange, 3 years of guaranteed rental stability. No void, no refresh costs, no risk of a new tenant. And a strengthened trust relationship with a reliable tenant who feels heard.

What I learned

Three lessons for any landlord facing a rent reduction request:

1. Calculate before you react. The question is not “do I want to reduce the rent?” but “does the reduction cost me less than a departure?”. In 90% of cases, the answer is yes. A good rental management software helps you track these figures.

2. Always require a counterpart. A rent reduction without a counterpart is a gift. With a commitment on duration, it is a balanced commercial agreement. Formalise it by a signed and registered addendum.

3. The EPC is your next challenge. In Brussels, indexation restrictions for energy-inefficient properties will tighten. If your property is EPC E or F, plan insulation work. An investment of EUR 10,000 in insulation can move you to EPC C, unlock indexation and increase the rent by EUR 50-100/month. Over 10 years, it is easily profitable. See our guide on EPC and obligations in Belgium.

Other real-life cases: My tenant has not paid for 3 months and The tenant disputes the exit inventory.