Initially presented as a simple administrative update, the declaration of real estate is entering a more restrictive phase. From 2026, the tax administration no longer simply invites owners to verify information related to their housing. It intends to penalize oversights, delays and errors more systematically. The fixed fine is set at 150 euros per property concerned, with an increased risk in the event of bad faith or fraud.
This tightening is part of a broader logic of reliability real estate data. By cross-referencing information on owners, occupants and actual use of housing, the tax authorities refine their knowledge of the residential park. The objective is to better identify second homes and vacant housing, two categories still in the tax scope. For taxpayers, this increase in power requires new vigilance, even though the system has already been marked by bugs and numerous reporting errors.
A stricter obligation, with sanctions involved
The declaration must be updated before July 1 if the situation of a home has changed in the previous year. In the event of omission or inaccurate information, the fine of 150 euros applies to each property. “Presented as an administrative formality, the reform of the declaration of real estate will reach a milestone in 2026. After a running-in phase marked by bugs and a certain tolerance from the administration, the system is now entering into a logic of reinforced control”warns Thaïs Castang, partner at L&A Finance.
Occupants of second homes targeted
The novelty is also due to the widening of the scope. The device “is no longer content to target only owners: occupants of second homes are now also involved, with sanctions in case of omission »underlines Thaïs Castang. For the administration, the challenge is to have a photography more detailed view of the actual occupancy of housing. “By always carefully cross-referencing data (owners, occupants, use of housing), the tax administration is equipped with a precise map of French real estate assets”she adds.
Behind the declaration, the issue of future taxes
For Thaïs Castang, the heart of the matter is budgetary: “the objective is to make knowledge of the real estate stock more reliable to better target the taxes still in force, particularly on second homes and vacant housing”. She also warns about the scope of the movement: “behind this reporting obligation lies a major budgetary issue”. In short, the abolition of the housing tax on the main residence has not eliminated the tax pressure on real estate. She moved it to other segments of the park, with the risk that a simple reporting error could be costly.
