With the CSRD (Corporate Sustainability Reporting Directive) now in effect, managing greenhouse gas emissions is no longer just a cosmetic exercise. For companies with significant logistics operations, Scope 3, particularly freight transport, often accounts for over 80% of their total carbon footprint.
However, it is also the most complex category to audit. One methodological error can cause the entire credibility of your sustainability report to collapse under scrutiny from statutory auditors.
Here are the 7 critical errors that consistently lead to CSRD reports being rejected on their transport component.
1. Relying on Spend-Based Data
This is the most common mistake: converting your transport invoices into tonnes of CO2e using monetary ratios. While this method is acceptable for a quick estimate, it is insufficient for CSRD.
- The problem: Inflation or fluctuating fuel prices distort the results without reflecting operational reality.
- The solution: Prioritise activity-based data (tonne-kilometres) or, even better, primary data provided by your carriers.
2. Forgetting the Full Fuel Lifecycle (Well-to-Wheel)
Many companies only account for tailpipe emissions (Tank-to-Wheel). However, the ESRS (European Sustainability Reporting Standards) require a comprehensive view.
- The mistake: Failing to include emissions related to the extraction, refining, and transport of the fuel itself.
- The risk: A massive underestimation of the impact, especially for biofuels or electric vehicles, which are never "zero-emission" in a lifecycle analysis.
3. Lack of Justification for Scope Exclusions
The CSRD is based on the principle of double materiality. If you decide to exclude downstream transport or customer returns from your Scope 3 on the grounds that they are "negligible," you must prove it.
- The pitfall: Arbitrarily excluding flows that are complex to track.
- The requirement: Any exclusion must be documented, justified by a materiality threshold, and validated during the materiality assessment.
4. Using Outdated or Generic Emission Factors
Relying on ADEME's 2018 carbon database for a 2024 report is a major error. Energy mixes change, as does fleet performance.
Key points to watch:
- Check the update date of your databases.
- Ensure the emission factor matches the exact transport mode (e.g., 40-tonne HGV vs. Light Commercial Vehicle).
- Systematically document the source of every factor used.
5. Ignoring Upstream Transport Managed by Suppliers
Scope 3 transport doesn't stop with the goods you ship. It also includes the transport of raw materials to your facilities, even if you are not the direct contracting party for the transport (e.g., under Ex Works or FOB Incoterms).
- The impact: This data is often the most difficult to collect, but omitting it makes the report incomplete under the ESRS E1 standards.
6. Failing to Audit the Reliability of Carrier Data
Receiving an Excel file from a carrier stating "100 tonnes of CO2" is not enough. The auditor (an Independent Third-Party or ITP) will ask how this figure was calculated.
- The key question to ask: Does your carrier use the ISO 14083 standard?
- Tip: Implement contractual clauses that require transparency on calculation methods (actual distances, load factors, actual fuel consumption).
7. No Decarbonisation Pathway Linked to the Figures
The CSRD is not just an accounting exercise; it is a tool for transition. Presenting figures without an associated action plan is a strategic error that can be flagged as a governance weakness.
- What to include: If your emissions are increasing, you must explain why (e.g., business growth) and how you plan to reverse the trend (e.g., modal shift, route optimisation, alternative fuels).
Conclusion: Towards Data-Driven Logistics
Successful Scope 3 transport reporting requires a shift from a "transport cost" culture to a "transport data" culture. To avoid having your report rejected, the key lies in traceability and methodological rigour.
Do not see the CSRD as an administrative burden, but as an opportunity to optimise your supply chain. Greater visibility over your emissions almost always leads to improved operational efficiency and, ultimately, to fuel and cost savings.
Is your company ready for the audit? Start by mapping your data flows today.