CSRD Scope 3 transport: how to demand reliable reporting
CSRD demands verifiable transport data: why fuel-based reporting and traceable HVO are key to securing your Scope 3.
The CSRD shock: why per-kilometre estimates no longer pass
For years, a spreadsheet with distance travelled and an average emission factor was enough to document the transport line item. Under the CSRD, that approach has become a direct audit risk. Statutory auditors and independent third-party bodies no longer accept a declaration at face value: they require an audit trail, meaning primary data traceable back to its source.
In practice, a supply chain director presenting a spend-based estimate—calculated from the invoiced amount charged by the carrier—risks an audit finding, or even a non-conformity if the financial volume is material. Auditors now benchmark the method used against the reliability hierarchy set out in the GHG Protocol and expected under ESRS E1. A crude estimate on a material Scope 3 line undermines the credibility of the entire sustainability report.
The problem is not just about form. An average figure hides operational reality: two carriers billing the same amount can have radically different carbon footprints depending on their fleet, load factor and fuel. It is precisely this invisibility that the CSRD is designed to eliminate.
The method hierarchy: why fuel-based is the only reliable path
Three methods, three levels of reliability
The spend-based method converts a financial amount into emissions using a generic sector factor. It is quick to produce but entirely insensitive to a carrier's decarbonisation efforts: whether the truck runs on diesel or HVO, the reported figure stays the same. It is a last-resort method, tolerated only when no other data is available.
The distance-based method, more refined, applies an emission factor to vehicle type and distance travelled. It improves precision but remains an average: it does not reflect the fuel actually burned, nor the real load factor of the vehicle on a given trip. It is an intermediate tier, often used for category 4 (upstream transport) for lack of better data.
The fuel-based method starts from the actual fuel consumption declared by the carrier, trip by trip. It is the only approach that faithfully captures genuine operational decarbonisation, whether from eco-driving, load optimisation, or a switch to an alternative fuel such as HVO. It is also the method favoured under ISO 14083 for calculating emissions across logistics chains.
Only fuel-based data faithfully reflects the real impact of a fuel choice on a shipper's Scope 3 footprint.
Pitfall #4: when decarbonisation effort becomes invisible
One of the most frequent and costly audit pitfalls happens silently. A carrier may run part of its fleet on HVO, a fuel that can reduce GHG emissions by up to 90% (depending on the feedstock used and the calculation methodology under the RED II / RED III directives), without ever reporting it separately. The fuel is simply grouped into a generic “diesel” category.
The direct consequence: the client company never captures the real reduction in its Scope 3 footprint, even though it paid a premium for cleaner transport. The environmental benefit exists physically but disappears on paper for lack of documentary traceability. It is a double loss: financial, because the investment in sustainable fuel is not credited, and reputational, because the supply chain's genuine effort remains invisible to stakeholders.
To avoid this trap, the client company must contractually require a breakdown by fuel type and, ideally, a named sustainability certificate for every batch of HVO consumed. Without this explicit requirement in the transport specifications, most carriers will keep reporting at the aggregated level that is simplest for them, not the one that is most useful to you.
How digitalisation and HVO turn the constraint into an advantage
The good news is that this traceability requirement, often seen as an administrative burden, becomes a differentiator for carriers that prepare for it. A partner able to produce ISO 14083-compliant reports, with RED II/RED III certificates automatically generated per fuel batch, instantly satisfies a CSRD auditor's expectations. It turns a regulatory obligation into a commercial argument at tender stage.
But you still have to be able to find HVO. Having the right paperwork isn’t enough if the fuel itself is hard to come by, if supply is limited, or if the price offered isn’t competitive. That’s precisely where the digitization of the market comes into play.
The role of Heeding is to simplify access to the market. The platform allows carriers to compare offers from multiple producers and distributors, check prices and availability, and place orders directly from a single platform. Instead of searching for and contacting suppliers one by one, buyers can compare the options available when they need to refuel, while centralizing all the information and traceability documents associated with their orders.
Before the next reporting cycle, it is safer to assess the actual CSRD readiness of your transport suppliers than to discover gaps during an audit. Assess your decarbonization options with the Heeding Flash Diagnostic.
