How to split travel expenses with friends

• Shared by everyone: accommodation, the rental car, fuel, tolls, the group shopping.
• Shared by those who take part: activities, dinners out, drinks.
• Personal: souvenirs, your own snacks, anything only you wanted.

Say it once in the group chat before the trip and most arguments never happen.

The receipts you mean to add later are the ones that cause trouble. In 4trips anyone in the trip can add an expense in a few seconds: what it was, how much, who paid and who it is split between. Everyone sees the same list and the same balances straight away, and the person who paid or the organizer can fix a mistake.

Not every cost is for everyone. When you add an expense, tick only the people it was for: the four who went on the boat trip, everyone except the person who skipped dinner. In 4trips each expense is split equally among the people you tick; if you need uneven shares (one person had the expensive room), add it as separate expenses.

On a trip through Switzerland, Czechia or Croatia, people pay in francs, crowns and euro. Pick one trip currency at the start. In 4trips you can enter each expense in the currency you actually paid, and it is converted at the European Central Bank rate of that day, with the original amount kept for reference.

At the end, nobody wants to make ten small transfers. 4trips works out each person's balance and suggests the smallest set of payments that brings everyone to zero. You pay each other by bank transfer, PayPal or cash, then mark the payment as done so the balances update; a recorded payment can be undone if it was a mistake.