V55/5 boxes
What do I put in V55/5 box 38 mass in service?
Reviewed 2026-07-10
Short answer
Use the mass in service in kg from the Certificate of Conformity, or get it from the vehicle manufacturer.
Official position
The V355/5 guidance says box 38 is mass in service in kg and tells applicants to take it from the Certificate of Conformity or get it from the vehicle manufacturer.
What to do
1
Check the CoC first for mass in service.
2
If there is no CoC, ask the manufacturer or use approval evidence where accepted.
3
Do not confuse mass in service with revenue weight, gross vehicle weight or unladen weight.
4
Use kg and keep the source document with the V55/5 pack.
Common mistakes
- Using kerb weight, gross weight or shipping weight without checking what the box asks for.
- Copying a forum value from a similar model.
- Leaving the field blank when the CoC has the value.
Related help
Official sources
Ready for this box
Complete it in the guided V55/5
Open the paid form when your supporting evidence is ready. Your answers are validated before the print-ready PDF is generated.