Vehicle depreciation: management and accounting calculations

Vehicle depreciation needs to be included in planning before replacing trucks or renewing the fleet. It represents an asset's loss of value over time and can influence the decision to keep, sell or replace a vehicle.

Mileage, condition, maintenance history, market demand and model characteristics can affect resale value. For a fleet intending to sell used vehicles, keeping track of these factors prevents the discussion from starting only when the asset already needs to leave the operation.

The calculation serves different purposes. A management figure helps project costs and replacement; accounting depreciation follows criteria that should be defined with the responsible department. Understand the factors and precautions involved:

• why vehicle depreciation affects the operation;
• how to calculate depreciation;
• how to reduce factors that can accelerate loss of value.

Why does vehicle depreciation affect your operation?

Time since manufacture

Time since manufacture is one of the factors considered in vehicle valuation. Even when idle, the asset ages and may require care regarding components, documentation, condition and parts availability.

There is no single depreciation percentage valid for every model or period. Purchase price, vehicle condition, demand, region and market conditions can produce different results. So use market references as support and also maintain your fleet's own history.

Vehicle condition

A vehicle's condition shows how it has been cared for and influences a prospective buyer's valuation. Two vehicles from the same year with similar mileage may have different values when their history, finish, components or overall condition differ.

Inspections, service records and timely corrections help demonstrate how the asset has been looked after. This does not guarantee a selling price, as some factors are outside the company, but provides more information for negotiation and the decision to keep or replace the vehicle.

Kilometers driven

Mileage is another data point considered in resale and lifecycle management. High mileage may be associated with greater component use and maintenance needs, but the number needs to be read alongside operation type, age, condition and service history.

Avoid treating a particular mileage as a universal limit for defining whether a vehicle is new, nearly new or used. References vary according to category, model and market. It is more useful to compare equivalent vehicles and record cost, availability and interventions throughout use.

Preventive maintenance and corrections made before greater damage occurs can help preserve vehicle condition. They do not prevent depreciation but can reduce situations involving accelerated wear or incomplete history that harm valuation.

Limited technological features

A vehicle's characteristics and features can also affect buyer interest. The effect varies according to truck type, application, region and what the market is seeking at the time of sale. A feature valued in one operation may not be relevant in another.

Before making changes to try to raise the asset's value, assess compatibility, warranty, technical requirements and maintenance impact. Mechanical or electrical modifications without proper care can create new costs or make the sale harder instead of improving valuation.

How to calculate vehicle depreciation

There are at least two useful perspectives: management and accounting. They should not be confused because they meet different needs. The first helps managers estimate usage and replacement costs; the second must follow the accounting and tax policies applicable to the company.

Management calculation

As a simple management estimate, it is possible to calculate the difference between the purchase price and the expected selling or residual value and divide it by planned months of use. The result shows a monthly average for planning, not a guarantee that the vehicle will sell for that amount.

For example:

R$ 120,000 (purchase price) − R$ 90,000 (estimated selling price) = R$ 30,000

R$ 30,000 ÷ 60 months of use = R$ 500 average management depreciation per month

Market references, such as Brazil's FIPE vehicle price table when applicable to the vehicle, can help build an expectation. Also compare actual offers, condition and equivalent vehicles, because a table does not replace assessment of the specific asset.

Include this estimate in operating fixed costs when it is part of the company's cost model. Set aside funds and review purchase planning based on recorded assumptions, rather than treating the monthly average as a definitive amount.

Accounting calculation

The accounting calculation should follow the rules and policies applicable to the company, considering useful life, residual value and the adopted method. These definitions may not coincide with the loss of value perceived by the market or with the management resale estimate.

For this reason, the accounting department should validate the rate, period and records used. This reduces the risk of using a generic rule for all vehicles and allows budgets, statements and purchase decisions to be analyzed using the correct criterion.

Watch the video on the subject:

(video in Portuguese)

How can you avoid vehicle depreciation?

Depreciation cannot be eliminated, but the fleet can reduce factors that accelerate wear or lower the quality of vehicle history. The actions below help care for the asset and make better-informed decisions.

Train and develop drivers

Driver training can cover defensive driving, inspection procedures and reporting issues. Those who use the vehicle daily may notice changes and record an incident so it can be assessed by the responsible team.

Training should not transfer technical diagnosis or responsibility for all upkeep to drivers. It needs to be part of a process offering guidance, a reporting channel and maintenance referral when needed.

Adopt fleet management systems

A management system can centralize data on expenses, maintenance, inspections and vehicle history. Its value lies in using that information to keep track of costs, identify outstanding issues and discuss actions, not just generate reports.

Maintenance management solutions and an electronic checklist can support recording observed conditions and referring noncompliance for action. Before choosing a tool, define which data need to be collected, who will fill in records and how the team will respond to them.

Invest in preventive maintenance

A preventive routine helps keep track of components and correct issues before they worsen. The effect depends on plan quality, service execution and history analysis; it is not a resale value promise, but a practice that helps preserve the vehicle.

Qualified labor, inspections and service records make the history more consistent. When a change is identified, the company can decide whether to correct it, monitor it or remove the vehicle from service according to its procedure and technical assessment.

Prolog's Electronic Checklist allows inspection questionnaires to be structured and observations to be recorded for referral. Discover the Electronic Checklist and its features for fleet routines.