
The security deposit in social housing is governed by a strict legal framework, but the reality of practices varies depending on landlords and tenant profiles. The law of July 6, 1989, sets the ceiling at one month’s rent excluding charges for an unfurnished rental. This amount seems straightforward to determine, yet the question of the “ideal amount” of the deposit goes far beyond this single regulatory figure.
Security deposit in social housing: what the law truly allows the landlord to demand
The confusion between “guarantee” and “security deposit” often muddles the understanding of obligations. The security deposit is an amount paid to the landlord upon signing the lease, cashed immediately, and kept for the entire duration of the rental. The guarantee, in legal terms, refers to the commitment of a third party (individual or organization) to pay the rental debts in case of tenant default.
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For tenants who want to learn everything about the social housing guarantee, this distinction changes the way to approach the financial setup for moving in.
A social landlord can require a security deposit capped at one month’s rent excluding charges for an unfurnished property. This ceiling cannot be revised during the lease or upon its renewal. For a furnished property, the ceiling rises to two months’ rent excluding charges, but this case remains marginal in the social housing sector.
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The landlord can also request a guarantee, meaning a guarantor. Nothing prohibits this in the HLM sector. The two mechanisms (security deposit and guarantor) can be combined, except when the landlord has already taken out unpaid rent insurance, in which case combining with a guarantee is excluded by law, except for students and apprentices.

Amount of the security deposit and HLM rent: why the calculation is not so obvious
One month’s rent excluding charges, the rule seems clear. In practice, the actual amount depends on the rent applied to the property, which varies according to the geographical area, the type of financing of the program, and the household composition.
Rents in social housing are capped by financing category (PLAI, PLUS, PLS). The same T3 can show very different rents from one neighborhood to another or from one organization to another. The security deposit mechanically follows this variation.
The question of the “ideal amount” arises less from the landlord’s side (who applies the legal ceiling) than from the tenant’s side, who must mobilize this sum at the time of signing. For a household with modest income, even a single month’s rent can represent a significant financial effort, especially when they also need to pay the first month’s rent and any moving costs.
The trap of furnished housing in social housing
Some social programs offer furnished housing, particularly for young professionals or temporary residences. The security deposit then increases to two months’ rent excluding charges. This doubling often surprises tenants who do not expect it, and there is no possibility for negotiation on this point: the ceiling is legal, not contractual.
Financing the security deposit: FSL, LOCA-PASS and the limits of these schemes
Several aids allow covering all or part of the security deposit. The Housing Solidarity Fund (FSL) provides assistance or loans depending on the departments. The LOCA-PASS advance, offered by Action Logement, takes the form of an interest-free loan repayable over several months.
- The FSL depends on the department: eligibility criteria, amounts granted, and processing times vary greatly from one territory to another
- The LOCA-PASS advance is accessible to private sector employees and young people under thirty, but it does not always cover the entire deposit requested
- The Visale guarantee, often mentioned, does not finance the security deposit: it covers unpaid rents and charges through a free guarantee offered by Action Logement
Field feedback varies on the actual effectiveness of these schemes. The processing times for the FSL can exceed several weeks, which poses a problem when the landlord requires the security deposit at signing. The LOCA-PASS advance requires a complete file and an eligible employer.

Visale guarantee and solidarity guarantee: what impact on the actual amount of the deposit
The Visale guarantee functions as an exclusive guarantee to any other guarantee. If the landlord accepts Visale, they cannot additionally request a physical guarantor or unpaid rent insurance. This point is often misunderstood, including by some HLM organizations.
Visale covers unpaid rents and charges for the tenant’s principal residence. In the private sector, the coverage extends over the first thirty-six monthly payments for an unfurnished rental. Conditions vary according to the type of lease and the tenant’s profile (employee, student, young person under thirty).
The interest of Visale for the tenant in social housing is indirect but real: by securing the landlord against the risk of unpaid rent, the scheme can make the physical guarantor unnecessary and reduce the documents required for the file. The security deposit remains due, but the tenant no longer has to look for a relative willing to commit jointly.
Solidarity guarantee or simple guarantee: what the lease must specify
When a social landlord requests a guarantor, the type of guarantee radically changes the scope of the commitment. With a solidarity guarantee, the landlord can call on the guarantor from the first unpaid rent, without waiting for a court decision. With a simple guarantee, they must first establish the tenant’s insolvency. The lease must explicitly mention the type chosen, otherwise the guarantor’s commitment may be contested.
Determining the “ideal” amount of the deposit in social housing thus involves articulating three elements: the security deposit capped by law, the type of guarantee required by the landlord, and the aids available to finance the move. The legal amount is fixed, but the actual burden depends on the overall setup between deposit, guarantee, and support schemes.