How much does one kilogram of dead weight cost a fleet over 10 years?

Compoform · 17 Oct 2026

One kilogram of dead weight costs a fleet roughly €150 to €300 in lost revenue per vehicle per year, depending on freight rates, utilisation, and route length. Over a 10-year operating life, that single kilogram compounds into a four-figure loss per vehicle before you account for the additional fuel it burns on every trip. For fleets running dozens or hundreds of vehicles, the arithmetic becomes a serious procurement argument.

The calculation applies most directly to truck bodies, trailers, and cargo vans where gross vehicle weight limits are fixed by regulation and every kilogram of structural dead weight is a kilogram that cannot carry revenue-generating cargo. The questions below unpack the mechanics, the numbers, and the point at which switching to lightweight sandwich panels pays for itself.

How does dead weight translate into lost revenue per vehicle?

Dead weight reduces your legal payload capacity by an equivalent amount. Under European regulations, a standard articulated truck operates within a fixed gross vehicle weight limit. Every kilogram the body structure weighs is a kilogram subtracted from the cargo you can legally carry. At typical European road freight rates, each kilogram of lost payload capacity represents a direct, recurring revenue shortfall on every loaded trip the vehicle makes.

The mechanism is straightforward. Freight is priced by weight or volume, and most heavy transport operations run close to their weight limit on loaded legs. A truck body built from steel or hardwood panels may weigh several hundred kilograms more than a comparable composite structure. That difference does not disappear after the first trip. It repeats on every trip, across the full operating life of the vehicle.

Consider a trailer body where the floor, walls, and roof together weigh 400 kg more than a thermoplastic sandwich panel equivalent. At a freight rate of €0.20 per kilogram per trip, and assuming 300 loaded trips per year, that structural excess costs the operator €24,000 per year in foregone payload revenue per vehicle. The figure scales directly with freight rates and utilisation. Higher-value freight or more intensive operations produce proportionally larger losses.

In 2026, this calculation has gained a second dimension for electric truck operators. Lighter body structures extend battery range per charge. Every kilogram of structural dead weight reduces the distance an electric truck can travel before recharging, which affects route planning, charging infrastructure requirements, and operational flexibility. For EV fleet buyers, weight reduction is a range argument as much as a payload argument, and it is now a standard question in procurement conversations.

What is the actual cost of one kilogram of dead weight over 10 years?

Over a 10-year vehicle life, one kilogram of dead weight costs a fleet operator approximately €1,500 to €3,000 in lost payload revenue, depending on freight rates and annual utilisation. This estimate assumes 250 to 300 loaded trips per year at European road freight rates. Add the fuel cost of moving that kilogram over the vehicle’s lifetime, and the total economic impact of a single kilogram of unnecessary structural weight is measurable and significant.

The 10-year figure is not a theoretical ceiling. It is the realistic operating horizon for a well-maintained trailer or truck body. Operators who replace steel or wood structures with lightweight alternatives at the point of build or refurbishment capture the full benefit across that horizon. Operators who delay the switch lose the compounding benefit of every trip made with the heavier structure still in place.

Fuel cost adds a separate line to the calculation. Carrying an extra kilogram over 100,000 kilometres per year at typical diesel consumption rates adds a modest but real fuel cost per vehicle per year. Across a fleet of 50 vehicles and a 10-year period, the fuel penalty from excess structural weight accumulates into a figure that procurement teams can and should include in their total cost of ownership models.

How much does excess vehicle weight affect fuel consumption?

Excess vehicle weight increases fuel consumption because the engine must work harder to accelerate, maintain speed, and climb gradients. Industry experience and vehicle dynamics modelling consistently show that reducing a truck’s total weight by 1,000 kg can lower fuel consumption by roughly 1.5% to 3%, depending on route profile, load factor, and vehicle type. The effect is proportional, so smaller weight reductions produce smaller but still meaningful savings.

For a heavy truck covering 120,000 kilometres per year, a 1.5% fuel saving translates to a meaningful reduction in annual diesel expenditure. At current European diesel prices, the saving per vehicle per year is large enough to appear as a line item in fleet operating budgets. Multiply that across a fleet and across a 10-year operating life, and the fuel argument alone justifies a serious review of body structure weight.

Electric trucks amplify this relationship. Battery range is directly affected by total vehicle weight. A lighter body structure means the battery delivers more kilometres per charge, which reduces charging frequency and extends the operational window between stops. For fleet operators transitioning to electric vehicles, structural weight reduction is not a secondary consideration. It is a core specification requirement that affects the commercial viability of EV routes.

What’s the difference between steel, wood, and composite panel weight in truck bodies?

Steel, wood, and composite sandwich panels differ substantially in areal weight, and those differences translate directly into body structure weight. Steel panels used in truck body construction typically weigh three to five times more per square metre than thermoplastic sandwich panels of equivalent structural performance. Hardwood or plywood floors are lighter than steel but still significantly heavier than composite alternatives, and they absorb moisture over time, adding further weight in service.

To put this in concrete terms using Compoform’s own panel data: a 30 mm thermoplastic sandwich floor panel with a PP honeycomb core has an areal weight of 7,600 g/m² (approximately 7.6 kg/m²). A comparable hardwood floor panel typically weighs 15 to 20 kg/m² or more, depending on species and thickness. For a trailer floor of 40 square metres, that difference represents a weight saving of 300 kg or more from the floor alone, before accounting for walls and roof.

Wall panels show even more pronounced differences. A 20 mm thermoplastic sandwich wall panel with a PP foam core weighs approximately 2,930 g/m², under 3 kg/m². Steel wall cladding of comparable rigidity is substantially heavier. When you calculate the total surface area of a truck body’s walls, floor, and roof, the cumulative weight difference between a steel or wood structure and a composite sandwich structure routinely reaches several hundred kilograms per vehicle.

Beyond raw weight, composite panels offer a durability advantage that affects total cost of ownership. Thermoplastic sandwich panels last significantly longer than plywood in heavy transport applications for truck bodies and trailers. Where a plywood floor may require replacement every three to five years, a composite floor can remain in service for 12 years or more. Over a vehicle’s life, that eliminates two or three replacement cycles, each of which carries panel cost, installation labour, and vehicle downtime.

How do fleet operators calculate the ROI of switching to lightweight panels?

The ROI calculation for switching to lightweight composite panels rests on four variables: the payload revenue recovered, the fuel saved, the replacement cycles eliminated, and the upfront cost premium. Fleet operators who model all four variables consistently find that the composite option is cheaper per year of service than steel or wood, even when the unit price of the composite panel is higher.

A practical model works as follows:

Quantify the weight saving: Calculate the total weight difference between the current body structure and a composite equivalent, in kilograms.
Convert to payload revenue: Multiply the weight saving by your average freight rate per kilogram and your annual loaded trip count. This gives you the annual payload revenue recovered per vehicle.
Add fuel savings: Estimate the fuel reduction from the lower vehicle weight, using your annual mileage and current fuel cost. A conservative estimate of 1.5% fuel saving per 1,000 kg of weight reduction is a reasonable starting point.
Account for replacement cycles: Calculate the cost of replacing wood or steel panels over the vehicle’s operating life, including panel cost, labour, and downtime. Subtract this from the composite option, which requires no replacement over the same period.
Compare total cost over the operating horizon: Divide total cost by years of service for each option. The composite option typically shows a lower annual cost from year three or four onward.

Fleet operators running larger vehicles or higher-value freight will see faster payback periods. Those operating electric trucks should also factor in the range benefit, which may reduce charging infrastructure costs or enable longer routes without intermediate charging stops.

When does switching to composite panels make financial sense for a fleet?

Switching to composite sandwich panels makes financial sense at the point of new build or scheduled refurbishment, when the comparison is between a composite structure and the full cost of the conventional alternative over the vehicle’s remaining life. For most European truck body and trailer operators, the break-even point falls within two to four years, after which the composite option generates net savings through recovered payload revenue, lower fuel consumption, and eliminated replacement cycles.

The case is strongest when one or more of the following conditions apply:

The fleet operates close to gross vehicle weight limits on loaded trips, meaning every kilogram of structural weight directly displaces revenue cargo.
The fleet is transitioning to electric vehicles, where structural weight affects battery range and charging economics.
The current body structure requires frequent panel replacement due to moisture damage, impact, or wear, generating recurring maintenance cost and downtime.
End customers or logistics contracts specify weight limits or sustainability criteria that the current structure cannot meet.
The fleet operates in markets where composite materials are increasingly specified by end users, creating competitive pressure on body builders and operators to adopt lighter structures.

The case is weaker for fleets that rarely run at maximum payload, operate short urban routes where fuel consumption differences are smaller, or face no near-term refurbishment trigger. For those operators, the calculation still favours composites over a full vehicle life, but the urgency of switching is lower.

One practical consideration: switching does not require redesigning the vehicle. Composite sandwich panels are available in custom dimensions and can be specified to match existing mounting systems and body geometry. No hardware changes or retraining of assembly personnel are required when the panel format matches the existing design. This removes a common objection to switching and makes the transition operationally straightforward.

How We Help You Reduce Dead Weight and Recover Payload Revenue

We manufacture thermoplastic sandwich panels for truck bodies, trailers, and cargo vehicles at our ISO-certified facilities in the Netherlands. Every panel is produced to your exact specification, including custom dimensions that are not available off the shelf elsewhere in Europe. Our production line handles panels up to 13,500 mm × 2,950 mm × 150 mm, covering the full range of commercial vehicle body formats.

Here is what working with us looks like in practice:

Panel configuration review: We review your current body structure and identify where composite panels deliver the greatest weight saving without compromising structural performance. For truck body floors, a self-supporting 30 mm PP sandwich panel eliminates the need for an aluminium subframe, removing a production step and reducing cost.
Custom dimensions to your specification: Panels are cut to your exact dimensions, with edge sealing and edge bending applied where needed to protect the core from moisture and UV exposure during vehicle washing and outdoor use.
Lifecycle cost modelling: We help you build the TCO case for your procurement team, including payload revenue recovered, fuel savings, and replacement cycles eliminated over the vehicle’s operating life.
Ongoing technical support: We support you through integration, address issues as they arise, and iterate on panel configuration as your production requirements evolve. We approach each project as a partnership, not a one-time transaction.

If you are building or refurbishing truck bodies or trailers and want to understand exactly how much dead weight your current structure is costing you, talk to our engineering team directly. We will review your design, run the numbers for your specific application, and identify the configuration that delivers the best outcome for your fleet economics.