The French tax law is based on a simple principle: each taxpayer can declare only one principal residence. This dwelling, occupied for the majority of the year, determines the essence of real estate taxation, from capital gains exemption to the abolition of the housing tax. A recent decision by the Council of State, rendered on July 7, 2026, has reshuffled the cards for married couples by separating principal residence from common tax household.
Council of State Decision of July 7, 2026: What Changes for Married Couples
In its decision n° 506653, the Council of State ruled that the principal residence must be assessed individually, even when spouses are subject to joint taxation. In practical terms, a married couple can have two distinct principal residences for the purposes of the housing tax.
This interpretation breaks with the previous practice of the tax administration, which equated a single tax household with a single principal dwelling. The administrative judge now requires a concrete examination of each spouse’s situation, regardless of the address listed on the income tax return.
The Council of State also specifies that this address is only one element of consideration among others. It does not create any irrefutable presumption. The administration must examine the reality of the occupation of the dwelling, which places the burden of proof on factual grounds. You can learn more on Immobilier et Particuliers to gauge the practical implications of this evolution.
Proof of Occupation: The Justifications That Matter for the Tax Administration
The recognition of a double principal residence entirely depends on the ability to demonstrate effective and habitual occupation of each dwelling. The administration and the judge examine a bundle of concrete evidence.
- Energy consumption bills (electricity, gas, water) attesting to regular and significant use of the dwelling, not just occasional
- Local subscriptions: internet, landline phone, home insurance contracts mentioning the dwelling as the principal residence
- Administrative correspondence received at this address, registrations on electoral rolls, or neighborhood attestations
- Professional elements: employment contract, employer certificate, proof of commuting that links one of the spouses to the geographical area of the dwelling
The address on the income tax return is not sufficient to establish the principal residence. A couple that merely checks a box without providing these justifications would be exposed to a tax adjustment.
The Trap of Inconsistent Consumption
A dwelling declared as a principal residence but whose energy statements show occupation for only a few weeks per year will be reclassified as a secondary residence. The tax administration has tools for cross-referencing with energy suppliers. Consistency between the declaration and consumption data constitutes the first control filter.
Housing Tax and Secondary Residence: The Tax Consequences of Reclassification
Since 2023, the housing tax has been abolished for principal residences. However, it still applies to secondary residences, and certain municipalities in tight zones impose a surcharge that can reach significant levels.
Recognizing a dwelling as a principal residence eliminates the housing tax on that property. For a couple with two dwellings in two different cities, the financial stakes are direct: without recognition of the double principal residence, one of the two dwellings bears the housing tax on secondary residences, potentially increased.
Surcharge in Tight Zones: A Concrete Financial Risk
Municipalities classified as tight zones can vote for a surcharge on secondary residences. This increase is added to the base housing tax. For an owner whose dwelling is reclassified as a secondary residence, the bill can increase markedly, not to mention any late payment interest in case of an adjustment.
Capital Gains Exemption on Sale: The Status of the Dwelling at the Time of Transfer
The sale of a principal residence benefits from a total exemption from capital gains tax. This regime does not apply to secondary residences, which are subject to specific taxation with a system of progressive deductions based on the holding period.
The status of principal residence is assessed on the day of the sale, not at the time of purchase. A dwelling occupied as a principal residence but left vacant for several months before the sale may lose this status. The administration examines whether the seller actually and habitually resided there at the time of the sale.
For a married couple with two dwellings recognized as their respective principal residences, the question of capital gains exemption remains open. The Council of State’s decision of July 2026 concerns the housing tax, not directly the capital gains regime. The available data does not allow us to conclude that this jurisprudence will automatically extend to capital gains exemption.
Double Residence for Professional Reasons: The Existing Framework Before the Jurisprudence
Regardless of the 2026 decision, tax law has long allowed the deduction of double residence expenses for employees required to live far from their family home for professional reasons. This provision does not create two principal residences in the tax sense. It allows the deduction of certain expenses (rent of the second dwelling, transportation costs) in the calculation of actual expenses.
The conditions are strict: the double residence must result from a professional constraint, not a comfort choice. An employee temporarily transferred or whose spouse works in another city may qualify. Double professional residence is an expense deduction, not a change in the status of the dwelling.
The jurisprudence of the Council of State opens a different field, focused on the very qualification of the dwelling concerning the housing tax. The two mechanisms coexist without merging, and their tax effects do not completely overlap. Field feedback varies on how local tax services will articulate these two frameworks in the coming months.
