The informal "three times the rent" rule has long been used in Belgium's rental market, but its legal status was disputed. On 30 March 2026, the Council of State settled the question: checking a tenant applicant's solvency is lawful. Here is what property managers need to understand, and what this ruling does not change.
What the Council of State confirmed on 30 March 2026
In a ruling dated 30 March 2026, Belgium's Council of State validated the practice of verifying prospective tenants' solvency before entering into a lease. The decision establishes several points that every property manager should be aware of.
First, the landlord (or a managing agent acting on their behalf) may legitimately ask for information about an applicant's financial resources in order to assess their capacity to meet their contractual obligations, taking into account not only the rent but also the fixed charges associated with the property. The Council of State states clearly that "the owner cannot be reproached for choosing the tenant who offers the greatest number of guarantees."
Second, the informal "3x the rent" rule, under which an applicant must demonstrate monthly resources at least three times the rent, is recognised as proportionate and legitimate. It does not appear in any statutory or regulatory provision, but it is also not prohibited and is not considered discriminatory in itself. The Council of State confirms that requiring proof of resources equal to three times the rent and fixed charges is not disproportionate.
This ruling comes in a specific context: the Brussels regional administration had, in some earlier cases, sanctioned tenant selection practices based on financial criteria by treating them as discrimination on grounds of wealth. The 30 March 2026 decision restores a legally grounded reading of the situation, distinguishing discrimination based on origin or social status from an objective solvency criterion.
What the ruling does not change: the limits that remain
The Council of State ruling is not a blank cheque to select tenants on any criterion you choose. Anti-discrimination protections remain fully in force.
In Belgium, several legal frameworks prohibit discrimination in access to housing. In Brussels, the Ordinance of 4 September 2008 on combating discrimination in access to housing penalises refusals based on origin, wealth, family situation, disability, sexual orientation or other protected characteristics. Equivalent instruments apply in Wallonia and Flanders.
The fundamental distinction drawn by the 30 March 2026 ruling is this: an objective solvency criterion (sufficient income to cover rent and charges) is lawful; concealed discrimination (refusing an applicant because of their origin or social status, using solvency as a pretext) remains prohibited.
What makes a criterion lawful is its objective character and uniform application. If the 3x-rent rule is applied uniformly to all applicants, with the same supporting documents requested and the same evaluation standards applied, it is legally defensible. If it is applied selectively based on a perceived profile of the applicant, it can become discrimination.
Good practices for a documented and defensible screening process
The Council of State ruling provides a solid legal foundation, but it is necessary to draw the practical consequences for your internal procedures.
Define your criteria before accepting applications
Before putting a property on the market, set your selection criteria in writing: minimum income level required, types of income accepted (salary, self-employment income, pensions, benefits), number of payslips or documents to be provided. Apply this framework to every applicant without exception.
The aim is twofold: consistency in decisions, and protection in the event of a challenge. If an applicant believes they have been rejected on discriminatory grounds and files a complaint, your documentation must show that the same process was followed for everyone.
Record decisions in factual terms
For each applicant, keep a written record of the file reviewed and the reason for the decision (acceptance or rejection). The reason must be factual and tied to the solvency criteria you defined: "declared monthly income below the minimum threshold" is a defensible reason; "general unfavourable impression" is not.
This paper trail protects against two risks: the risk of a discrimination complaint, and the risk associated with falsified application documents. On that point, our article on landlord scams and falsified files details the most common falsification techniques and the checks you should carry out systematically.
Apply criteria, not stereotypes
The 3x-rent rule is a tool for measuring solvency. It says nothing about a tenant's reliability, behaviour or ability to maintain a property. An applicant whose income comes from social benefits may perfectly well meet the solvency criterion if the total amount is sufficient. Refusing them on the grounds that their income comes from benefits rather than a salary could constitute discrimination based on wealth or social situation.
This is an important point: the Council of State validates the verification of financial capacity, not discrimination between types of income where the level is equivalent.
The standardisation challenge for agencies
For an agency managing several dozen or hundreds of properties, consistency in tenant screening is both a compliance issue and an operational one.
When several managers select tenants across different properties, there is a temptation to adjust criteria on a case-by-case basis, sometimes unconsciously. One manager applies 3x the rent strictly; another accepts 2.5x with additional guarantees; a third incorporates a non-documented employment stability criterion. These variations, even when well-intentioned, create legal risk if they reflect (even inadvertently) biases related to the characteristics of applicants.
Standardising a common application framework, with the same documents requested and the same evaluation criteria applied, resolves this problem at its root. It protects the agency, it protects individual managers, and it guarantees applicants fair treatment.
SEIDO makes it possible to centralise applications in a structured workflow: each applicant submits their documents through the same process, the same evaluation grid is applied, and the decision is recorded with the reason. This documentary consistency is, where necessary, the best defence against an allegation of discrimination.
Frequently asked questions
Is the 3x-rent rule written into Belgian law?
No. There is no Belgian statutory or regulatory provision imposing or defining a specific income-to-rent ratio. The 3x-rent rule is an industry practice, validated by the Council of State as proportionate and not discriminatory in itself, but it is not codified. This also means you can apply a different ratio (2.5x, 3.5x) as long as it remains objective, justified and uniformly applied.
Can you request three months of bank statements in addition to payslips?
In Brussels, Article 7bis of the Brussels Housing Code governs the information a landlord may request as part of an application. In principle, documents requested must be proportionate and necessary to assess solvency. Recent payslips and a certificate of employment are generally considered sufficient. Requesting bank statements may be seen as excessive in certain cases. In Wallonia, the Housing Decree also governs what you may request. In practice, set a written standard and respect it.
Can an applicant challenge a refusal based on insufficient income?
Yes, in theory an applicant can challenge a refusal. But if your rejection is based on objective criteria (income-to-rent ratio not met), documented (complete file reviewed), and applied uniformly (same criteria for all applicants), the challenge is unlikely to succeed. Documentation is your main protection.
What if an applicant presents informal income or income from abroad?
This is a nuanced area. You may require verifiable documents (payslips, tax assessment, consular attestation for foreign income). If you cannot verify solvency because no usable supporting documents are available, that is an objective ground for refusal, not discrimination. Document precisely the absence of supporting evidence, not the applicant's nationality or origin.
Key takeaways
The Council of State, in its ruling of 30 March 2026, confirms what most professionals in the sector were already applying: checking a prospective tenant's solvency is legitimate, and the 3x-rent rule is a recognised proportionate criterion.
What the ruling does not change is the prohibition on discrimination in access to housing. A financial criterion is a tool for objective assessment, not a disguised filter for excluding applicants on other grounds.
The practical conclusion is straightforward: standardise your screening framework, document each decision, and apply the same criteria to every applicant. That is the condition for solvency checks to remain what they should be: a rental risk management tool, not a source of legal disputes.
Sources and references
- Council of State (Conseil d'Etat), ruling of 30 March 2026 (Belgium)
- Brussels Ordinance of 4 September 2008 on combating discrimination and promoting equality of treatment in access to housing
- Walloon Decree of 6 November 2008 on combating certain forms of discrimination
- Brussels Housing Code, Article 7bis (documents that may be requested from applicants)
- Walloon Decree of 15 March 2018 on residential leases