- 1The executive committee accounts for 5 to 15% of the Bilan Carbone®, concentrated on 4% of staff.
- 2Long-haul flights offer the main opportunity to reduce executives' footprint.
- 3The 4-hour rule and choosing rail: a 30 to 50% reduction is within reach.
- 4No internal credibility without visible alignment by senior management.
When a service company carries out its first Bilan Carbone®, there is a moment of surprise that occurs almost every time: air travel by the executive committee accounts for a disproportionate share of the total footprint. Not 1 or 2%, but 5 to 15% of the company's footprint, concentrated on a few people.
This is not a reproach; it is physics. A long-haul flight emits huge quantities of CO₂, and management roles structurally involve more international travel. But it is a fact that must be faced when discussing a reduction strategy.
1Why carbon footprint correlates with seniority
Take an SME with 200 employees and an executive committee of 8 people. If each member takes 2 European flights and 1 intercontinental flight a year, that represents around 24 tonnes of CO₂, equivalent to the annual footprint of 3 average French people, concentrated on business travel by 8 people.
An executive committee of 8 people = 24 tonnes CO₂/year from travel
Business travel footprint by profile
Celsius calculations based on ADEME
Meanwhile, an office-based employee who drives 30 km every day emits around 1.5 tonnes a year commuting. Through flights alone, an executive committee member therefore emits around 3 tonnes a year, 2 times what that employee emits getting to work. This is a scale of impact we find in the vast majority of our engagements with service companies.
- An executive committee of 8 people (2 EU flights + 1 intercontinental flight each/year): ~24 tonnes CO₂
- 200 office-based employees (30 km/day by car): ~300 tonnes CO₂
- The executive committee = 4% of staff, but 5 to 15% of the total carbon footprint in service companies
- A Paris-New York return flight = 2 tonnes of CO₂, more than a year of daily car journeys
2Emissions by destination
To manage a travel policy, you need to know the actual carbon cost of each journey. These are the figures we use in our assessments, taken from the ADEME Base Empreinte and validated by our 120+ engagements.
Emissions by destination from Paris (return, 1 passenger)
In tonnes CO₂, red line: annual budget compatible with +2°C
ADEME Base Carbone, 2024
- Paris-London: 0.15 tonnes by air versus 0.01 tonnes by Eurostar (a factor of at least 15). Eurostar is faster door to door
- Paris-Barcelona: 0.4 tonnes by air versus 0.01 tonnes by rail (a factor of at least 40). Comparable door-to-door journey times
- Paris-New York: 2 tonnes return. No land-based alternative. This is the entire annual carbon budget compatible with +2°C
- Paris-Singapore: 3.8 tonnes. 190% of the annual budget compatible with +2°C
- Paris-Sydney: 6 tonnes. 300% of the annual budget compatible with +2°C
3The credibility effect: why employees look to the top
Beyond tonnes of CO₂, there is an issue of internal credibility that can make or break a climate plan. Employees increasingly understand the scale of impacts. They see LinkedIn posts, read the press and do their own calculations.

Asking employees to sort their waste and turn down the heating while executives fly 10 times a year creates dissonance that undermines the credibility of the entire approach. This is not moralising; it is something we observe in practice: climate plans that engage teams are those in which management leads by example.
The first step in a credible climate plan is often the simplest: management gives up one or two flights a quarter and replaces them with video calls. The impact in tonnes is modest. The impact on internal credibility is considerable.
4Three practical ways to reduce the travel footprint
The 4-hour rule
For any journey feasible by train in less than 4 hours, flying is removed from the travel policy. Paris-Lyon (2h), Paris-Brussels (1h22), Paris-London (2h15), Paris-Bordeaux (2h04). For these journeys, flying offers no door-to-door time advantage and has 10 to 20 times the carbon impact.
The annual flight allowance
Each employee has an annual travel carbon budget. They are free to use it as they wish, but once it is exhausted, meetings take place by video. This encourages responsibility without imposing a ban and naturally prioritises travel with high added value.
Video calls by default
The most structural change is to reverse the default. Meeting in person is no longer the norm; it is an exception that needs justification. The pandemic showed that video calls work at scale. Companies applying this principle cut their travel by a factor of 2 to 3 without any measurable loss of productivity.
- The 4-hour rule: rail is mandatory for journeys under 4h. Zero cost, immediate reduction
- Annual carbon allowance: encourages each employee to take responsibility without imposing a ban
- Video calls by default: travel becomes the exception. Travel emissions divided by 2-3
- SNCF corporate contract: negotiable from modest volumes, often more advantageous than flying in actual journey time
5Key takeaways
The carbon footprint of business travel is concentrated at the top of the organisation chart. This is not inevitable; it is a major opportunity for emissions reduction and a signal of credibility for the whole climate approach.
- 5 to 15% of a service company's total footprint is often concentrated on air travel by the executive committee (4% of staff)
- A Paris-New York return flight = 2 tonnes of CO₂, the entire annual budget compatible with +2°C. Paris-Sydney = 6 tonnes
- The 4-hour rule (mandatory rail under 4h) and video calls by default are zero-cost measures that reduce this category by 30 to 50%
- Credibility is built from the top: climate plans that engage teams are those in which management leads by example
- A Bilan Carbone® quantifies the breakdown of travel by seniority precisely and helps manage reductions




