Free tool

Fleet greening tax: where do you stand?

Since 1 March 2025, companies whose fleet reaches 100 light vehicles must green their renewals or pay a tax. The official calculation covers neither your whole fleet nor only this year’s acquisitions — which is what catches most people out. This simulator applies the administration’s formula.

Your fleet

Five figures are enough. Everything is a number of vehicles.

Tax year

All your taxable light vehicles, averaged over the year. Below 100, you are not liable.

This is the scope of the calculation: vehicles added from N-3 to N, bought or leased. Not the whole fleet.

Among them, your low-emission vehicles

Split by category: the official weighting ranges from one to two and a half.

Every vehicle that is not low-emission, added during the current year. This figure drives the renewal rate.

Objective met

€0

Your low-emission vehicles cover this year’s objective. Careful: the target rises to 25% next year.

Target rate for the year18%
Target integration objectivetarget rate × vehicles added over 4 years28.8 veh.
Your low-emission vehiclesafter the weightings are applied31 veh.
Gap to the objectiveif the gap is nil or negative, the tax is nil-2.2 veh.
Renewal ratehigh emitters added this year ÷ total fleet15.8%
Unit rate for the year€4,000
Estimated tax€0

An indicative estimate, based on the formula published by the administration: unit rate × gap to the objective × renewal rate. It does not replace your declaration and takes into account neither the exemptions (rental, public passenger transport, driving schools, farming, overseas territories) nor the pro rata of vehicles leased for less than a year. The weightings depend on eligibility for the environmental score published by ADEME.

The calendar that applies to fleets of 100 light vehicles and more

Target share of low-emission vehicles among the vehicles added, and the rate per missing vehicle.

  • 2025

    15 %

    €2,000

  • 2026

    18 %

    €4,000

  • 2027

    25 %

    €5,000

  • 2028

    30 %

    €5,000

  • 2029

    35 %

    €5,000

  • 2030

    48 %

    €5,000

Source: French Ministry for Ecological Transition — greening of the vehicle fleet

Three things almost nobody calculates correctly

The base is not your fleet

The objective covers neither the whole fleet nor only this year’s acquisitions, but the vehicles added over the last four years. A fleet that renews little has a smaller objective.

An electric van counts for 2.5

Low-emission vehicles are weighted: ×1 for a passenger car, ×1.5 if it has a low carbon footprint, ×2 for a van, ×2.5 for a low-carbon van. Electrifying a van is worth two and a half times electrifying a saloon.

The renewal rate dampens everything

The amount is multiplied by the share of high-emitting vehicles added this year within your total fleet. A company that slows down its combustion purchases lowers its tax, without buying a single electric vehicle.

The real calculation needs data your spreadsheet does not have

Dates of entry, assignment durations, categories, eligibility for the environmental score: Dadycar keeps them up to date vehicle by vehicle.

Request a demo

Frequently asked questions

Who has to pay the greening tax?

Companies whose fleet of taxable light vehicles reaches at least 100 vehicles on annual average. The threshold is assessed in vehicle-days across the year, not on 31 December. Leased vehicles count in the lessee’s fleet.

How exactly is the amount calculated?

The amount is the product of three terms: the unit rate for the year, the gap to the target integration objective, and the annual renewal rate of high-emitting vehicles. If the gap is nil or negative, the tax is nil: there is no credit and no carry-over.

Which vehicles does the objective cover?

The vehicles added to the fleet over the last four years, from N-3 to N. It is neither the total fleet nor only this year’s acquisitions. That is the most common mistake.

What counts as a low-emission light vehicle?

A vehicle emitting no more than 50 g of CO2 per kilometre on the WLTP cycle and meeting a ceiling on air pollutants. The “low carbon footprint” subset carries an additional weighting and depends on the environmental score list published by ADEME.

Which activities are exempt?

Vehicles used exclusively for rental, public passenger transport, driving instruction, farming and forestry, sporting competitions, as well as the French overseas territories covered by article 73 of the Constitution.

Does this simulator replace my declaration?

No. It gives an order of magnitude from aggregated figures. The real declaration requires a vehicle-by-vehicle count, with dates of entry, assignment durations and exempt uses. Talk to your accountant.