How to split costs fairly
Shared costs such as accommodation, car hire, and group activities are divided equally among all travellers. Individual costs like flights, personal meals, and solo excursions stay with the person who incurred them. The per-person total is the sum of their share of shared costs plus their individual costs.
For families with children, some groups split shared costs by adult only or apply a reduced share for children. Agree on the splitting method before the trip to avoid awkward conversations afterwards.