Most companies treat travel emissions as a reporting problem. It is actually a data problem and it starts much earlier than the end of the quarter.
There is a pattern that plays out in sustainability teams across Europe right now. The annual report deadline approaches, someone asks for the travel emissions figures, and what follows is weeks of pulling booking confirmations from inboxes, chasing expense reports, converting flight distances into emissions estimates, and trying to reconcile numbers that were never collected consistently in the first place.
The result is a figure that is technically defensible but practically unreliable. And as emissions reporting moves from voluntary to mandatory, unreliable is no longer good enough.
The regulatory pressure is real and it is building
The EU’s Corporate Sustainability Reporting Directive has reshaped the emissions reporting landscape for large companies operating in Europe. Under the current framework, companies with more than 1,000 employees and annual turnover above €450 million are required to report on their sustainability metrics, including business travel emissions, in line with European Sustainability Reporting Standards.
Business travel falls under Scope 3 emissions: the indirect emissions that result from a company’s activities but occur outside its direct operations. Scope 3 is notoriously difficult to measure accurately, and business travel is one of the most significant contributors for companies with frequent travelling employees.
What matters here is not just whether a company is currently in scope for mandatory reporting. Even companies that fall below the formal thresholds are increasingly being asked for emissions data by customers, procurement teams, financing partners, and parent organisations that are themselves subject to reporting requirements. The demand for accurate, auditable travel emissions data is moving through supply chains and organisational structures regardless of whether a company faces a direct legal obligation.
The direction of travel is clear: emissions data that was optional two years ago is becoming expected, and data that is expected today will become required tomorrow.
Why unmanaged travel makes CO₂ reporting nearly impossible
Accurate emissions reporting requires three things: complete data, consistent methodology, and a traceable source. Unmanaged travel programmes struggle to deliver any of them.
Complete data is the first problem. When employees book through a mix of consumer platforms, corporate cards, and personal accounts and then submit expense claims, the booking data is fragmented across sources. Some trips get captured. Some do not. An expense claim that says ‘flights: €340’ tells you nothing about the route, the airline, the aircraft type, or the class of travel, all of which affect the emissions calculation significantly.
Consistent methodology is the second problem. Emissions factors for flights vary depending on which calculation framework is used, whether radiative forcing is included, and how the distance is measured. When different teams or individuals calculate their own travel emissions, or when figures are pulled from different tools that use different methodologies, the results are not comparable and cannot be aggregated reliably.
Traceability is the third problem. Sustainability reporting increasingly requires assurance, meaning that the underlying data needs to be auditable. A figure assembled from spreadsheets, estimates, and retrospective booking confirmations does not meet that standard. Auditors need to be able to trace each data point back to its source. That is only possible if the data was collected systematically at the point of booking.
Where the data gap actually begins
It is tempting to think of CO₂ reporting as a finance or sustainability team problem. In reality, the gap is created much earlier, the moment a booking is made outside a managed system.
Every unmanaged booking is a data point that the organisation will never recover cleanly. The route is unknown. The emissions factor cannot be applied consistently. The trip may or may not appear in an expense report, and if it does, the information available is usually financial rather than operational.
By the time the sustainability team asks for the numbers, the underlying data simply does not exist in a form that can produce a reliable emissions figure. The team does its best with what is available, but the result is an estimate built on incomplete information.
For companies now facing formal reporting obligations, or informal ones from clients and partners, that estimate is no longer a reasonable position.
What a managed travel platform changes
When all bookings flow through a single managed platform, the emissions data problem is solved at source rather than chased after the fact.
Each booking carries its own emissions data from the moment it is confirmed: the route, the airline, the aircraft type, the class of travel, and the applicable emissions factor calculated against a consistent methodology. That data is attached to the booking, not reconstructed from it later.
The practical implications for reporting are significant.
Real-time visibility replaces end-of-quarter reconstruction. At any point in the reporting period, the sustainability or finance team can pull a current picture of travel emissions by department, project, route, or individual. There is no waiting, no chasing, and no estimation.
Data quality becomes auditable. Because every figure traces back to an actual booking in a single system, the data trail is clean and defensible. The methodology is consistent across all bookings, which means the figures can be aggregated, compared, and verified by external auditors.
Greener choices become visible at the point of decision. A managed platform can surface the emissions impact of different options when a traveller is making a booking: this flight versus that one, train versus air, direct versus connecting. When the information is available in the moment, travel behaviour can change gradually and sustainably rather than being mandated from above.
Reporting becomes a process, not a project. Instead of a quarterly or annual scramble to assemble figures, emissions reporting becomes a routine output from a system that is already running. The data exists because the bookings exist. The report writes itself from information that is already there.
The real cost of not having the data
Companies that cannot produce reliable travel emissions figures are increasingly exposed on multiple fronts.
The most immediate risk is reputational. ESG disclosures that contain weak or estimated travel data are identifiable to sophisticated stakeholders: investors, procurement teams, and regulatory auditors. A figure that cannot be substantiated is worse than a higher figure that can.
The second risk is competitive. As procurement processes increasingly include sustainability criteria, the ability to demonstrate accurate, auditable emissions data becomes a differentiator. Companies that can provide it have an advantage in tender processes. Companies that cannot are increasingly asked to justify the gap.
The third risk is internal. Without reliable data, it is impossible to set meaningful reduction targets or measure progress against them. Sustainability commitments that are not backed by data remain aspirational. Those backed by consistent measurement become achievable.
The connection to the hidden cost conversation
In a previous article, we explored the financial costs of unmanaged travel programmes: the time tax, the compliance gaps, the reporting inefficiencies. CO₂ reporting adds a further dimension to that picture.
Unmanaged travel does not just cost money and time. It costs data. And in a reporting environment where emissions figures are increasingly scrutinised, audited, and compared, missing data has a value that is only becoming clearer as requirements tighten.
The companies that are ahead of this are not the ones that launched a sustainability initiative. They are the ones that made accurate data collection a structural part of how they manage travel, not as an add-on, but as a natural output of a system that was already running.
That starts at the booking screen.
DIB Travel tracks CO₂ automatically at the point of booking, giving your sustainability and finance teams clean, auditable emissions data without the quarterly scramble. Learn more at dibtravel.com
