Are you wondering how to properly declare your properties in 2026 to avoid penalties or mistakes that could impact your real estate project? Are you unsure about which usage to indicate (second home, vacant property, furnished rental) or which supporting documents to keep?
The 2026 property declaration is explained step by step in this guide. We detail how to declare your real estate assets in 2026, the deadlines to meet, and the common pitfalls. We also show how to use the “Manage my real estate properties” service on impots.gouv.fr and, if necessary, the paper form 1208-OD-SD (see the DGFiP FAQ).
We also review special cases (SCI, joint ownership, furnished rentals) and provide a practical checklist to save time. For any specific question, contact your local Capifrance real estate advisor, who will help you secure your procedures and succeed in your real estate projects.
Understanding property declaration in 2026
The 2026 property declaration allows the administration to know the use and occupancy of housing as of January 1, 2026. This information is used to ensure the reliability of tax bases. It impacts the 2026 second home housing tax and the 2026 vacant property tax. It also plays an indirect role for wealth tax on real estate (IFI) and cadastral rental value.
The process is mainly carried out via the “Manage my real estate properties” service on impots.gouv.fr. A paper alternative exists. It is the 1208-OD-SD form, reserved for cases of digital inaccessibility.
The scope covers residential properties. Included are houses, apartments, parking spaces, and related outbuildings. Furnished rentals, seasonal rentals, and vacant properties are also concerned. The administration requires the actual use as of January 1, 2026.
All owners must comply: individuals, SCI, joint ownership, and legal entities. The procedure varies depending on status. Individuals use their personal tax account. SCI submit their declaration via the professional space. In joint ownership, a single declaration per property is sufficient.
Key takeaway: legal basis and instructions are available on impots.gouv.fr and the DGFiP FAQ. Information verified on 04/09/2026.
What is property declaration?
The “Manage my real estate properties” service centralizes the list of properties known by the administration. It allows you to correct or add a property. You must indicate the use as of January 1, 2026 and the identity of occupants. Fields are often pre-filled (address, cadastral surface).
Online declaration of property in 2026 is preferred. If you cannot access digital services, use form 1208-OD-SD. In this case, send it to your tax office and keep a copy.
Who is concerned: individual owner, SCI, joint ownership, and legal entities
An individual declares via their personal tax account. SCI use the professional space and may need to provide a company registration extract and SIREN number. Deadlines may differ for SCI.
In joint ownership, only one declaration is required per property. Income is then distributed among co-owners according to their shares. Legal entities must verify their status and seek advice if necessary.
When and how to declare in 2026: step-by-step procedure
Here is how to declare a property in 2026 in 6 simple steps. Follow them to meet the 2026 deadline and keep proof.
Log in to your personal tax account on impots.gouv.fr and activate two-factor authentication.
Select “Manage my real estate properties” and review the pre-filled list.
Check the property address, cadastral surface, and use as of January 1, 2026.
If a property is missing, select “add a property” and fill in the required information.
Validate and download the PDF summary. Keep this document as proof.
If you cannot declare online, print and send form 1208-OD-SD.
Avoid technical pitfalls: do not lose the PDF proof, do not confuse Carrez surface with cadastral surface, and do not forget the SIREN if you are a furnished landlord.
Where to declare: online service or paper form
Access the service via impots.gouv.fr → personal tax account → “Manage my real estate properties”. The interface allows you to edit, validate, and export a PDF summary.
For security, activate two-factor authentication. Choose a strong password and keep the validation PDF. For paper submission, send the 1208-OD-SD form by registered mail or submit it at your tax office.
Dates and deadlines to know in 2026
Key dates in the 2026 declaration calendar are clear. The general deadline is June 30, 2026 at 11:59 pm. For SCI, a specific deadline applies: the second working day following May 1, 2026.
If you moved in 2025, report it no later than July 1, 2026 if necessary. In case of delay, the administration first sends a reminder. Then, a fixed fine of €150 per property may be applied.
What information to provide and sensitive points to check
The declaration requires precise information. You must provide the property address, type of housing, cadastral surface, and use as of January 1, 2026. Also indicate occupant identity and occupancy dates.
For furnished rentals, include the SIREN number or registration number. If management is delegated, indicate the manager’s identity. Always verify pre-filled fields and correct them if needed.
Keep supporting documents: purchase deed, rental contract, rent statements, work invoices, and management certificates. These documents are useful in case of audit. Store them for 3 to 5 years.
Common caution: cadastral surface differs from Carrez surface. Check cadastral references or consult your real estate advisor if in doubt.
Property use as of January 1, 2026
The usage status determines tax impact. A primary residence is not subject to housing tax. A second home may be. Free occupancy must include beneficiary identity and exact dates.
Example: if you lent your house from March 1, 2025 to August 31, 2025, indicate “free occupancy”, the beneficiary, and the dates. This avoids reclassification as a second home.
For seasonal rentals, indicate the tourist nature of the lease and provide your SIREN if applicable.
Vacant property: reasons and supporting documents
Declaring a vacant property requires justification. Accepted reasons include major works, time between tenants, sale listing, personal reasons, or administrative constraints.
Provide or keep evidence: quotes, invoices, contractor certificates, sales mandates, or dated photos. These documents may be requested by the administration.
Special cases and complex situations
Several situations require special attention: SCI, joint ownership, sales, inheritances, life annuity, foreign properties, and high-value assets.
For a property acquired in 2024 or late 2025, the situation as of January 1, 2026 determines who declares. In inheritance cases, owners as of that date must declare. Consult a notary if needed.
Foreign properties are not always included in the service but may need to be declared depending on tax treaties.
SCI, joint ownership, and specific procedures
SCI declare via the professional space. The legal representative must provide company details and property lists.
In joint ownership, only one declaration per property is required. Coordinate information with co-owners.
Sold, purchased, inherited, and life annuity properties
Simple rule: declare according to the situation as of January 1, 2026.
For life annuity, ownership and annuity affect the declaration. Verify ownership status and contract details.
Furnished rentals and tax regime changes in 2026
Furnished landlords must provide their SIREN and manager details if applicable. Rental income declaration rules evolve in 2026.
The 2026 finance law sets the micro-BIC threshold at €15,000 with a 30% allowance for non-classified furnished rentals. Above this threshold, the real regime applies.
Advice: centralize your documents digitally to simplify declaration and verification.
SIREN, LMNP and LMP: what to declare
The difference between LMNP and LMP depends on activity level and registration. Provide your SIREN and manager details if applicable.
Ensure consistency with official registries to avoid delays.
Rental income declaration and micro-BIC changes
The reform applies to 2025 income declared in 2026. A 30% allowance applies below €15,000. Above this threshold, real accounting is required.
Example: €12,000 income results in €8,400 taxable base after allowance.
Penalties, common mistakes, and best practices
Mistakes are common but avoidable. After a reminder, a €150 fine per property may apply if not corrected.
Typical errors include missing a property, incorrect usage, missing SIREN, or lack of justification for vacancy.
To correct, update your property file online and keep proof.
Common mistakes to avoid
Missing a property
Confusing Carrez and cadastral surface
Forgetting SIREN
Incorrect usage declaration
Missing vacancy justification
Omitting annexes such as parking or outbuildings
Practical checklist before validation
Check address and cadastral reference
Confirm cadastral surface
Indicate usage as of January 1, 2026
Provide occupant details and dates
Add SIREN if applicable
Keep supporting documents
Check annex properties
Save validation PDF
Note deadlines
Contact a real estate advisor if needed
Why use a local real estate advisor?
A Capifrance advisor provides local expertise, helps estimate rental value, identify property usage, and optimize investments.
Conclusion
In summary, meet the June 30, 2026 deadline, declare the situation as of January 1, 2026, include SIREN for furnished rentals, and keep supporting documents.
Follow the checklist and contact a Capifrance advisor if needed. Official sources: impots.gouv.fr and DGFiP FAQ. Information verified on 04/09/2026.
FAQ
How to declare a property in 2026?
Log in to your tax account, access “Manage my real estate properties”, verify or add information, and validate. Use the paper form if needed.
Who must declare?
All property owners as of January 1, 2026.
What is the deadline?
June 30, 2026 at 11:59 pm.
What are the risks of errors?
A €150 fine per property may apply.
How to declare a vacant or second home?
Indicate usage, dates, and justification.
Do furnished landlords need to provide SIREN?
Yes.
What if my property does not appear?
Add it manually and contact your tax office if needed.
Is declaration required for SCI or joint ownership?
Yes.
What are common pitfalls?
Missing property, incorrect usage, surface confusion, missing documents.
Can you lie about your main residence?
No, it is tax fraud.
Who to contact?
Tax office, notary, advisor.
How to declare a tenant?
Provide identity and occupancy details.
How to complete the declaration?
Fill in address, surface, usage, and occupants.
How to declare a vacant joint property?
One co-owner can declare it with justification.
Is it included in income tax declaration?
No, it is separate.
What taxes apply?
Property tax, housing tax, vacant property tax, IFI, rental income tax.
What is occupancy declaration?
It informs the administration about property usage.
Must tenants be declared?
Yes, all occupants must be declared.
Author :
Frédéric Rémy – Director of Commercial Performance
A real estate professional for several years within the Capifrance network, I would like to share with you some essential advice to help you succeed in your real estate project with the support of our advisors.
