Comment calculer le TCO d'une flotte de véhicules ?

Le TCO d'une flotte (Total Cost of Ownership, ou coût total de possession) s'obtient en additionnant l'ensemble des coûts d'un véhicule sur son cycle de vie, divisé par son kilométrage total. La formule communément utilisée est la suivante : TCO = (coût d'acquisition + coûts d'exploitation + coûts financiers, valeur de revente déduite) divisée par le kilométrage total. Les coûts d'exploitation incluent l'énergie, l'entretien, les pneumatiques, l'assurance, la fiscalité (nouvelles taxes ex-TVS, AEN, AND), la sinistralité et la gestion administrative. Calculé à l'échelle d'un parc, le TCO se décompose en TCO véhicule (75 %), TCO conducteur (20 %) et TCO flotte (5 %) selon l'Observatoire du Véhicule d'Entreprise. Un logiciel comme Fleeti automatise ce calcul à partir des factures fournisseurs et de la donnée télématique réelle, par véhicule et par site.

Quels sont les principaux leviers pour réduire le TCO d'une flotte ?

Quatre leviers concentrent l'essentiel des économies réalisables : l'énergie et le carburant (premier poste, jusqu'à 28 % du TCO d'un thermique), le choix de la motorisation et la durée de détention (renouvellement, électrification ciblée), les contrats fournisseurs (LLD, cartes carburant, assurance, entretien) et le comportement conducteur (le TCO conducteur pèse environ 20 % du TCO global). Un cinquième levier, souvent sous-exploité, consiste à adapter la taille du parc en sortant les véhicules sous-utilisés, parfois remplacés par de l'indemnité kilométrique ou de l'autopartage. La priorité entre ces leviers se définit véhicule par véhicule, à partir d'un audit TCO chiffré, et non en moyenne de parc.

Pourquoi le TCO réel diffère-t-il du TCO théorique ?

Le TCO théorique est calculé avant l'attribution d'un véhicule, à partir des coûts catalogue, de la consommation WLTP et d'hypothèses d'usage standard. Le TCO réel intègre des éléments mesurables seulement en exploitation : consommation effective, temps de ralenti, kilométrage réel pro et perso, sinistralité observée, usure des pneumatiques, valeur résiduelle constatée à la revente. L'écart entre les deux atteint couramment 10 à 20 % par véhicule, presque toujours en défaveur de l'entreprise, et provient majoritairement du comportement conducteur. Mesurer cet écart exige une donnée d'usage continue issue de la télématique embarquée, ce que Fleeti collecte automatiquement sur chaque véhicule connecté.

Combien coûte en moyenne un véhicule en entreprise par an ?

Selon les sources du secteur, le TCO moyen d'un véhicule professionnel se situe autour de 10 000 € par an en France, tous postes confondus (acquisition ou loyer, énergie, entretien, fiscalité, assurance, sinistralité, gestion administrative). Ce chiffre varie fortement selon la motorisation, l'usage et le contrat de financement. Pour 2025, l'Arval Mobility Observatory chiffre le prix de revient kilométrique moyen à 0,476 € par kilomètre pour un véhicule particulier thermique et 0,423 € par kilomètre pour son équivalent électrique éco-scoré. Sur une flotte de 100 véhicules thermiques parcourant 25 000 km par an, le coût total dépasse couramment 1,2 million d'euros annuels.

Quelle est la différence entre TCO et TCM (Total Cost of Mobility) ?

Le TCO (Total Cost of Ownership) mesure le coût total de possession d'un véhicule de flotte, de son acquisition à sa revente. Le TCM (Total Cost of Mobility) élargit ce périmètre à toutes les formes de mobilité d'un collaborateur : véhicule de fonction ou de service, indemnité kilométrique, train, avion, taxi, vélo de fonction, autopartage, voire transports en commun. Le TCM est devenu pertinent depuis l'adoption des Forfaits Mobilités Durables et la diversification des modes de déplacement professionnels. Pour une entreprise qui pilote son budget mobilité au global, le TCO reste l'indicateur opérationnel principal, et le TCM l'indicateur stratégique à moyen terme.

Comment la télématique aide-t-elle à réduire le TCO d'une flotte ?

La télématique embarquée transforme le TCO d'un indicateur comptable en indicateur de pilotage. Elle remonte en continu la consommation réelle, le kilométrage exact, le temps de ralenti, le profil de trajets et le comportement de conduite de chaque véhicule. Croisée avec les factures fournisseurs, cette donnée révèle les véhicules sous-utilisés à sortir du parc, les conducteurs à coacher, les contrats LLD à renégocier sur la base d'un kilométrage réel, et les véhicules thermiques dont l'usage justifie une bascule à l'électrique. Sans télématique, le TCO reste un TCO déclaratif construit sur des moyennes ; avec elle, il devient un TCO réel actionnable par véhicule. C'est l'approche retenue par Fleeti.

Optimize the TCO of Your Fleet

Reduce the total cost of ownership (TCO) for each vehicle and the operating costs of your corporate fleet. Fleeti consolidates your expenses (fuel, maintenance, taxes, insurance claims, contracts) with real-world usage data, prioritizes cost-saving opportunities by vehicle, and quantifies the expected savings before each decision.

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Optimize the TCO of Your Fleet

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Find out how much your fleet really costs

A company vehicle costs an average of €10,000 per year, up to 60% of which consists of expenses not reflected in traditional accounting: taxes, depreciation, insurance claims, administrative costs, and traffic tickets.

Fleeti aggregates invoices from all your suppliers (rental companies, fuel providers, auto repair shops, insurers) and cross-references them with actual mileage data from connected vehicles.

You’ll move from reported TCO to measured TCO—a figure that’s reliable and defensible to the finance department—calculated by vehicle, by location, and by usage.

Identify your top five areas for cost savings

Not all strategies for reducing TCO are equally effective. For the same fleet, energy costs can account for 28% of a diesel vehicle’s TCO, while maintenance costs account for only 8%.

Fleeti prioritizes your cost-saving opportunities (energy and fuel, fleet renewal and electrification, suppliers and contracts, driver behavior, and fleet size) based on quantified potential savings, vehicle by vehicle.

You know where to focus your efforts first, why, and what results to expect within three to six months.

Plan for the impact of the 2025 and 2026 tax changes on your TCO

The elimination of the TVS, the introduction of the Annual Green Incentive Tax, the reform of the benefits-in-kind system effective February 1, 2025, and the expansion of Low-Emission Zones (ZFE) are fundamentally changing the actual cost of each vehicle in your fleet.

Fleeti incorporates these new rates, populates your CSRD (Corporate Sustainability Reporting Directive) reports, and calculates—on a per-vehicle basis—the expected additional cost or tax savings over the next twelve months.

You can make an informed decision about whether to keep, renegotiate, convert to electric, or retire a vehicle—without having to wait until the end of the year to see the bill.

Decide on a vehicle-by-vehicle basis: replace, electrify, or retire

A renewal decision is often worth several thousand euros per year per vehicle. It cannot be based on a fleet-wide average.

For each vehicle, Fleeti compares its actual TCO, its actual usage (kilometers, trip profile, utilization rate, driver behavior), and the projected TCO of its alternatives—internal combustion and electric.

You’ll receive a detailed, asset-level recommendation that’s ready to be presented to your management team and compliant with the requirements of the LOM Act.

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Optimizing TCO Across Three Orders of Magnitude

Optimizing a fleet’s TCO and ensuring cost control for a vehicle fleet starts with examining three key factors: the proportion of hidden costs in the current budget, the typical savings per vehicle, and the room for maneuver regarding fuel costs.

60 %

Share of hidden costs in the total cost of ownership (TCO) of a company vehicle (taxes, depreciation, accident rates, administrative costs).

1 950 €

Average annual savings per vehicle observed with a 5.9% reduction in fuel consumption.

15 %

Fuel consumption can be reduced through eco-driving training combined with telematics monitoring.

Estimate the potential TCO savings for your fleet

Estimate the actual TCO of your vehicle fleet, one vehicle at a time. The Fleeti calculator factors in all cost items and projects the potential savings for each electrification scenario. No account creation required—get immediate results.

Estimate My TCO Savings

Energy and Fuel

The first area for optimization, accounting for 25 to 28% of the TCO of a diesel vehicle. This can be achieved by accurately measuring fuel consumption, eliminating excessive idling, and providing training in eco-driving.

Renewal and Electrification

For a passenger vehicle, the difference in cost per kilometer (PRK) between a conventional internal combustion engine vehicle under a long-term lease or lease-to-own agreement (€0.476/km) and an eco-rated electric vehicle (€0.423/km) will reach 11% in 2025, according to the Arval Mobility Observatory.

Suppliers and Contracts

Renegotiation of long-term lease (LLD) and lease-to-own (LOA) contracts; adjustment of mileage allowances; and a comprehensive review of fuel cards, fleet insurance, and the processing of ANTAI traffic citations. This is an area that is often underutilized due to a lack of objective data to present.

Driver Behavior

According to the Observatoire du Véhicule d'Entreprise, driver-related TCO accounts for approximately 20% of total TCO. A well-designed eco-driving program has a simultaneous impact on fuel consumption, maintenance, and accident rates.

How to Assess the TCO of Your Fleet in Four Steps

Auditing the total cost of ownership (TCO) of a fleet involves four successive steps: consolidating all costs per vehicle, cross-referencing these costs with actual usage, prioritizing cost-saving measures, and then implementing a cost-estimated action plan. The reliability of the usage data determines the quality of the audit.

TCO Reference Formula

TCO = (acquisition cost + operating costs + financial costs - resale value) / total mileage

Standard breakdown used by the Corporate Vehicle Observatory (OVE). Three subcategories: vehicle TCO (75%), driver TCO (20%), and fleet TCO (5%).

01 Map

Compile all vehicle-related expenses for the past twelve months: purchase price or long-term lease (LLD) or lease-to-own (LOA) payments, fuel, maintenance, tires, insurance, taxes (TVS and other taxes, AEN, AND), accident history, and ANTAI traffic citations. At this stage, the calculated TCO is still an estimated figure.

02 Measure

Measure the actual usage of each vehicle using telematics: kilometers traveled, trip profiles, utilization rates, idle time, and driver behavior. This is where the reported TCO becomes the actual TCO, which can be used to inform decision-making.

03 Prioritize

For each vehicle, identify the top cost-saving measure and quantify the expected savings. An underutilized vehicle is removed from the fleet; a high-mileage internal-combustion vehicle is replaced with an electric one; a driver identified as high-risk is enrolled in an eco-driving program.

04 Decide and Act

Develop a 90-day action plan for each site and each manager. Measure the impact on TCO month by month, adjust the car policy accordingly, and justify your decisions to senior management using solid data.

Typical Example

A fleet of 50 internal-combustion vehicles, 25,000 km per year

For a fleet of 50 internal combustion engine vehicles traveling 25,000 km per year, the total annual TCO ranges from €480,000 to €600,000, depending on the engine type and the financing agreement. A Fleeti TCO audit typically identifies achievable savings of between 6% and 12% over the first twelve months—that is, between €30,000 and €70,000 per year—assuming the fleet size remains constant. The three most significant factors are energy costs, switching to actual renewable energy consumption for vehicles used primarily for business purposes, and removing underutilized vehicles from the fleet.

Why Your Actual TCO Differs from Your Theoretical TCO

The theoretical TCO is calculated based on list prices and standard usage assumptions. The actual TCO takes into account actual fuel consumption, observed accident rates, driver behavior, and the observed residual value. The difference between the two is typically 10 to 20 percent per vehicle, almost always to the company’s disadvantage.

Before the vehicle is assigned

Theoretical TCO

The theoretical TCO is used to help choose a vehicle before purchasing it: purchase price, WLTP fuel consumption, expected tax liability, and estimated residual value. It is a projection based on manufacturer data and average assumptions. As long as the vehicle performs according to this profile, the actual TCO remains close to the theoretical value.

Throughout the vehicle's service life

Actual TCO

The actual TCO includes metrics that only connected vehicles can measure: actual fuel consumption, idling, sudden braking, business and personal mileage, the frequency and severity of accidents, and tire wear. These metrics fall under the driver’s TCO, which accounts for approximately 20% of the overall TCO, according to the Observatoire du Véhicule d’Entreprise.

Closing the gap between theoretical TCO and actual TCO requires continuous usage data, not an annual audit. With Fleeti, each connected vehicle updates its own TCO in real time, and the deviation from the theoretical figure becomes a management metric rather than an unpleasant budgetary surprise.

2025–2026 Tax Calendar and Its Impact on Your TCO

Three tax changes will have a lasting impact on total cost of ownership (TCO) and will determine fleet cost optimization in France: the elimination of the TVS on January 1, 2025; the reform of the benefit-in-kind tax on February 1, 2025; and the phased implementation of the Annual Incentive Tax for Greening. Each of these changes must be anticipated on a vehicle-by-vehicle basis, not as a fleet-wide average.

January 1, 2025

Elimination of the TVS

The Company Vehicle Tax is being replaced by two annual taxes on the use of vehicles for business purposes. The impact varies: it penalizes high-emission internal-combustion vehicles and partially reduces the tax burden on hybrid and electric vehicles.

February 1, 2025

AEN Reform

The decree of February 25, 2025, raises the AEN flat rate for internal-combustion vehicles (from 9% to 15% of the price including tax) and grants a 70% reduction for electric vehicles with an eco-rating. Employer contributions will increase by up to €2,952 per internal-combustion vehicle per year.

The Year 2025 and Beyond

Annual Incentive Tax

The TAI for fleet greening replaces the quotas under the LOM Act. Financial penalties will be imposed on fleets that fail to meet the thresholds for low-emission vehicles. Proactive planning is essential in the fleet renewal plan.

December 31, 2027

End of the AEN electricity tax credit

Planned phase-out of the 70% AEN tax deduction for 100% electric vehicles with an eco-score. An anticipated increase in the total cost of ownership (TCO) of electric vehicles assigned to employees after this date; this should be factored into decision-making immediately.

For a fleet of 100 internal-combustion vehicles, the combined effect of the elimination of the TVS and the AEN reform alone could result in additional annual costs ranging from €120,000 to €250,000, depending on the specific circumstances. Fleeti models this impact on a vehicle-by-vehicle basis and recommends the most cost-effective solutions.

Frequently Asked Questions About Optimizing a Fleet's TCO

How do you calculate the TCO of a vehicle fleet?

What are the main ways to reduce a fleet's TCO?

Why does the actual TCO differ from the theoretical TCO?

How much does a company vehicle cost on average per year?

What is the difference between TCO and TCM (Total Cost of Mobility)?

How does telematics help reduce a fleet's TCO?

Updated: June 2026

What if every euro spent on your fleet went where it would yield the greatest return? Fleeti consolidates your actual costs, measures the actual usage of each vehicle, and prioritizes savings on a vehicle-by-vehicle basis. To move from a passive TCO to a proactive TCO.

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