The fleet greening declaration is a reporting obligation that requires the public disclosure of certain data relating to vehicles included in a fleet renewal. Companies with more than 100 vehicles, as well as certain public entities and specific operators, must publish information enabling them to track the proportion of low-emission or very low-emission vehicles among those renewed the previous year. According to Article D. 224-15-13 of the French Environmental Code, this data must be made available no later than September 30th of the following year. The September 30, 2026 deadline therefore applies to 2025 renewal data.
For CFOs and fleet managers, this deadline should be approached as a project to consolidate and improve the reliability of data. The challenge is not limited to the final publication: it involves identifying the correct scope, classifying the vehicles concerned, calculating the regulatory rates, and producing a declaration that complies with the expected requirements.
Who is affected by the declaration?
| Organization | Situation |
|---|---|
| Private companies | More than 100 light vehicles in the fleet |
| State and public institutions | More than 20 vehicles |
| Local authorities and local public institutions | More than 20 vehicles |
| Lessors, leasing companies and hire purchase | Specific procedure |
| Delivery platforms and ride-hailing/taxi booking centers | Specific procedure |
Companies operating more than 100 vehicles remain directly affected by the challenges of greening their fleets. Preparing this declaration is part of a broader approach encompassing fleet electrification, vehicle taxation, TCO control, and regulatory compliance.
What the reporting obligation covers
The general framework for greening fleets stems from the Mobility Orientation Law. This legislation imposes progressive targets for integrating low-emission vehicles during fleet renewals. These obligations are assessed based on the vehicles added to the fleet during a given year, whether purchased, leased, or financed through a finance lease.
The declaration aims to make public the proportion of low-emission and ultra-low-emission vehicles among those renewed. The published data must be freely accessible, reusable, and usable by an automated processing system.
The information is made available on data.gouv.fr to allow monitoring of the greening trajectories of the organizations concerned.
What data needs to be collected?
The decree of December 29, 2020 defines the format to be followed for the declaration. The information must be published as a structured file and include all the fields required by the national scheme.
1. Identification data
The declaration must include in particular the declarant's SIREN number, any covered SIREN numbers, the official name of the company, its NAF code and its legal category.
2. Renewal data
The report lists the vehicles integrated into the fleet during the year 2025. The data distinguishes in particular between passenger cars, light commercial vehicles, motorized two-wheelers, heavy goods vehicles, buses and coaches.
This step often requires combining several sources: orders, registrations, rental contracts, lessor data, registration certificates or exports from fleet management tools.
3. The published indicators
The file should allow the calculation and publication of the rates of low-emission and very low-emission vehicles included in the annual renewal of the fleet.
Who needs to prepare the declaration before September 30, 2026?
For companies with more than 100 vehicles, as well as for other stakeholders subject to the scheme, planning ahead is a key factor for success. The data to be published relates exclusively to renewals carried out during the year 2025.
CFOs and fleet managers must identify the entities concerned, classify the vehicles integrated into the fleet, consolidate the available data and check the consistency of the information before publication.
This preparatory phase helps to avoid discrepancies between accounting data, contractual information and operational data from the daily management of the fleet.
Where should the statement be published?
The data is published on data.gouv.fr in accordance with the required format. The Etalab platform allows for data preparation, verification of its conformity, and finalization of publication.
Rental, hire-purchase, leasing companies, as well as certain categories of operators, follow specific transmission procedures.
Useful official resources
Six official resources cover the essentials. The Etalab generator allows you to prepare and publish the declaration. The other resources are used to verify the scope, understand the expected format, or follow a specific procedure.
MAIN ACTION · WEB TOOL
Prepare and publish the statement
The Etalab generator accepts an existing form, spreadsheet or CSV, checks the format and then prepares the publication on data.gouv.fr.
ENTRY POINT · WEB PAGE
Ministry framework and resources
The scope, deadlines, special cases, transmission addresses and all official documents gathered on one page.
INSTRUCTIONS FOR USE · PDF
Tutorial for public fleets
The process intended for public actors to prepare the data, calculate percentages and publish the report.
BLANK MODELS · ZIP · 1.24 MB
Standard reporting spreadsheets
The archive contains templates for rental companies and leasing companies, taxi and ride-hailing booking platforms, and delivery platforms. Each user selects the spreadsheet that corresponds to their role.
This ZIP file does not constitute a universal template for a standard declaration on data.gouv.fr.
EXPECTED FORMAT · DOCUMENTATION
Classic reporting scheme
The definition of fields, formats and compliance rules for the CSV file published as part of standard reporting.
SPECIFIC CASES · DOCUMENTATION
Diagram of special procedures
The summary format intended for rental companies, leasing companies, delivery platforms and taxi and private hire vehicle booking centers.
How to effectively prepare for the September 30, 2026 deadline?
- Identify the legal entities concerned and the scope of the declaration.
- To inventory the vehicles integrated into the fleet during the year 2025.
- Classify vehicles according to their category and emission level.
- Consolidate data from leasing companies, suppliers and fleet management tools.
- Calculate the regulatory rates and verify the consistency of the results.
- Produce a file conforming to the national scheme before publication.
This approach transforms a reporting obligation into a genuine fleet management tool. It also fosters coordination between finance departments, purchasing departments, fleet managers, leasing companies, and external partners.
Key points to remember
The fleet greening declaration to be published before September 30, 2026 is based on renewals carried out in 2025. Companies with more than 100 vehicles as well as other relevant organizations must prepare reliable data enabling them to measure the share of low and very low emission vehicles integrated into the fleet.
For finance departments and fleet managers, this deadline also represents an opportunity to strengthen the management of the vehicle fleet, to support greening strategies and to anticipate regulatory and tax changes that impact professional mobility.
