
Social housing follows financial guarantee rules that are distinct from the private rental market. Since the law of July 6, 1989, no security deposit can be required for HLM housing. This prohibition, confirmed by decree No. 2024-512 of May 28, 2024, still surprises many candidates for social housing. Understanding this framework avoids budgeting errors and helps identify abusive practices.
Social housing and security deposit: a common confusion with the private sector
The majority of online guides discuss security deposits without distinguishing between the private and social sectors. In private unfurnished rentals, the landlord can request one month’s rent excluding charges. In furnished rentals, this cap rises to two months. These rules do not apply to HLMs.
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To determine the amount of the social housing security deposit, the regulatory answer is straightforward: this amount is zero. The HLM organization is not allowed to demand a security deposit from the incoming tenant. If an office or a mixed-economy company requests a sum for this purpose, the request is legally contestable.
The confusion also arises from the vocabulary. The term “caution” in law refers to a person who acts as a guarantor, not the sum paid (which is the security deposit). In common language, the two are mixed. In social housing, neither is mandatory to sign the lease, although some social landlords may suggest a guarantor in specific cases.
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Common estimation errors: what tenants mistakenly calculate
Many candidates for social housing set aside one or two months of rent before moving in, by analogy with a traditional rental. This sum, immobilized without reason, can represent a burden for households with modest incomes.
Three errors frequently occur:
- Confusing the first month’s rent (due upon entry) with a security deposit. The rent for the first month is payable, but it is not a refundable deposit at the end of the lease.
- Anticipating costs for the inventory of fixtures charged by the social landlord. In HLMs, the entry inventory does not incur any costs for the tenant, unlike some private rentals managed by agencies.
- Planning a budget for an external rental guarantee (such as GLI or bank guarantee) when the social landlord does not require one. These mechanisms pertain to the private sector.
The only amount to anticipate upon entry is the first month’s rent including charges. Checking the details on the notice of payment provided at the lease signing is sufficient to frame the actual budget.
Damage and exit from social housing: what replaces the security deposit
The absence of a security deposit does not mean the absence of financial responsibility for the tenant. At the end of the lease, an exit inventory is conducted. If damages are noted (beyond normal wear and tear), the social landlord can charge for repairs.
Without a security deposit to withhold, the HLM organization operates differently from the private sector. It issues a restoration invoice, which the tenant must pay after moving out. In case of disagreement, the tenant can contest by registered letter detailing the disputed points. The departmental conciliation commission can be seized.
Social landlords apply depreciation scales to assess the portion attributable to the tenant. These scales, negotiated locally or set by agreement, take into account the duration of occupancy. A floor covering worn after ten years of rental will not be charged at the same rate as after two years. The depreciation scale protects the tenant against disproportionate billing.
Contesting a billing after the exit inventory
The tenant has recourse if the billing seems unjustified. Photographing the housing during the entry and exit inventories provides the best protection. In the absence of evidence, the written description in the inventory takes precedence.
If the social landlord does not provide supporting documents (quotes, invoices for work), the billing can be contested. Field reports vary on this point: some HLM offices apply depreciation scales rigorously, while others interpret them less favorably for the tenant.
Predictive tools and rental risk management in HLM offices
In recent years, some HLM organizations have been experimenting with predictive analysis tools to assess rental risks in advance. The goal is not to select tenants (allocation remains governed by commissions and regulatory criteria), but to adapt the social support offered.
AI is used here to detect signals of financial fragility, not to replace the security deposit with another guarantee mechanism. A household identified as potentially in difficulty may be offered budgetary follow-up, referral to the FSL (Housing Solidarity Fund), or support from a social worker upon moving in.
These uses remain emerging. The available data do not allow for conclusions about their effectiveness on a large scale. A few offices, particularly in metropolitan areas, are testing these approaches as part of pilot programs. The CNIL strictly regulates the use of personal data in this context, which limits the scope of the algorithms used.
Alternative guarantees to the security deposit in social housing
In the absence of a security deposit, social landlords rely on other levers:
- The Housing Solidarity Fund (FSL), which can cover unpaid rent for eligible households.
- Social cohesion protocols, which provide enhanced support before any eviction procedure.
- Preventive management of unpaid rent through early reminders, sometimes automated, from the first late payment.
These mechanisms replace the logic of financial guarantee with a logic of support. The tenant does not advance anything, but the social landlord has institutional safety nets.

Estimating the amount of a deposit in social housing actually means verifying that no such sum is due. The regulatory framework has been clear since the 1989 law, reinforced by the 2024 decree. The only expense to anticipate remains the first month’s rent. For the exit, keeping the inventories and knowing the applicable depreciation scale remains the best protection against contestable billing.