Who pays for what when a group shares a travel plan

If everybody has their own eSIM, the split is easy and even: each traveller's plan is their own cost, and the organiser is simply the person who did the buying. Reimburse at cost, in one transfer, before the trip rather than after — a debt settled in advance never turns into a conversation.

If one phone carries a hotspot for the group, the arrangement is different: one person is paying for everybody's data and also carrying the battery drain, the responsibility, and the constraint of having to stay within range of everybody else. An even split of the plan's cost under-pays them, and the group should either say so and add something, or rotate who carries it.

Beyond the plans, somebody pays for the top-up when the hotspot runs out mid-week, the second plan bought because one phone turned out not to support eSIM, and the calls to the accommodation when a booking goes wrong. These are small individually and add up to real money, and they are exactly the ones nobody itemises.

The simple fix is a shared note listing what was bought and what it cost, updated as it happens rather than reconstructed at the airport. It does not need to be an app or a spreadsheet. It needs to exist before anybody has to remember.

Sharing one connection is worth it for a group that moves together and unravels for a group that does not. If people will split up during the day — and on most trips they will, however firmly they say otherwise — separate plans are not a luxury. The person on the hotspot cannot leave, and everybody else is offline the moment they do.

There is also a fairness point that only appears afterwards. A shared connection means one person's phone carried the group's video calls, uploads and maps, arriving home with a battery that will not hold a charge like it used to. That is not a cost anybody splits, and it is a reason to rotate the duty rather than to assign it once.