Transferring use of a second family residence to a grown child or offering your owned flat to an elderly parent touches more than logistics: it affects household taxes. In many Italian municipalities the carrying cost of the IMU on a property not occupied by its owner is significant, but the law includes a route to lighten
that burden when the property is granted in loan for use. That route requires strict compliance with formalities and objective conditions, otherwise the supposed advantage becomes a source of unexpected adjustments or penalties.
This article maps the essential rules: who can qualify, which properties are excluded, the owner and resident requirements, mandatory registrations and evidence, and how to reflect the benefit in tax payments. The aim is to help
owners decide whether the arrangement is genuinely convenient and to ensure documentation is in order in case the municipal tax office runs verification checks.
Who qualifies and what the measure actually does
The tax benefit is designed for direct family relationships: generally between parents and children. The rule typically allows a reduction of the taxable base used to compute the IMU—in many municipalities this translates into a halving of the base
rather than a full exemption. It is crucial to understand that this is a reduction of the base, not a complete waiver of the tax: a remaining amount is still due according to the local IMU rate.
Eligible relationships
Only close kin in the direct line are normally eligible. That means the most common eligible case is an owner granting the house to a child or, conversely, a child providing a home to a parent. Other family ties such as siblings, uncles, aunts or cousins are usually not covered by the preferential rule and will be taxed at standard rates unless other specific local provisions exist.
Properties that are not included
Certain dwellings are excluded from the benefit. Properties classed as luxury homes (cat. A/1, A/8, A/9) do not qualify. Before making any agreement it is advisable to check the cadastral classification of the building: an incorrect application of the reduction on an excluded category exposes the owner to recovery of tax plus penalties.
Conditions, residence rules and ownership limits
Municipalities and tax authorities verify both the owner’s position and the actual use of the property. A common requirement is that the owner must not hold an extensive portfolio of residential properties: many rules ask that the owner has only one residence in Italy or, at most, two dwellings located in the same municipality, with one of them being the owner’s principal residence. The family member who receives the property must establish an anagraphic residence there and actually live in the house as their main dwelling, since administrative checks cross-reference population registers with utility and tax records.
Required formalities and documentary proof
The tax relief is not automatic. The owner must prepare a comodato document and ensure its registration with the tax authority within the statutory timeframe—typically within 20 days from the signing. Even an informal or verbal arrangement should be formalised with a registered deed to qualify. Keeping copies of the registration receipt, the anagraphic certificate of the new resident and supporting items such as utility bills in the beneficiary’s name will be essential evidence in the event of a municipal audit.
Practical supporting documents
Useful evidence includes the registered comodato, a current certificate from the municipal registry showing the change of residence, and utility invoices or bank documents tied to the new address. The absence of convincing proof often leads municipalities to deny the reduction and request back taxes with interest and penalties; therefore organised documentation reduces both fiscal risk and future disputes.
How to calculate the relief and final steps
The starting point for the calculation is the cadastral income (rendita catastale) revalued according to statutory rules; that base is then adjusted by the local IMU aliquota. When applying the benefit, the taxpayer must enter the reduced base in the payment model (often the F24), and in most cases submit an IMU declaration or notification to the municipality to explain the factual situation. Small errors in computation or missing notifications are frequent triggers for corrections.
Before committing to the arrangement it is sensible to request a short review from a CAF or the municipal tax office to confirm eligibility, verify the cadastral category, and clarify any local rules that could affect the outcome. A written confirmation when available is particularly valuable. Organising the paperwork and respecting deadlines transforms a potential tax saving into a secure, long-term benefit for the family.