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Scope 3

How to Calculate Employee Commuting Emissions

Step-by-Step Process

  1. 1

    Survey employees on commute patterns

  2. 2

    Categorise by transport mode and distance

  3. 3

    Apply DEFRA transport emission factors

  4. 4

    Calculate annual emissions per employee

  5. 5

    Aggregate for total commuting emissions

Key Formulas

Distance (km) × Mode Factor × Days = kg CO2eAverage UK commute: ~15km each way

Common Mistakes to Avoid

  • Assuming all employees commute 5 days
  • Not accounting for hybrid working
  • Using car factors for all (ignoring public transport)
  • Double counting with grey fleet

Tools & Resources

  • Employee survey
  • DEFRA transport factors
  • Average commute data
  • Season ticket data

Automate Your Calculations

ComplyCarbon handles all these calculations automatically with built-in UK Government conversion factors.

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