Money is usually the first thing that goes unspoken on a group trip, and the first thing that causes friction once everyone's home. Here are five small habits that keep it from ever becoming a conversation you have to have.
The gap between paying for something and writing it down is where memory gets fuzzy and trust gets tested. Whoever pays should add the expense before the receipt goes in the bin, not at the end of the trip.
"We'll figure it out later" is how someone ends up covering a taxi they didn't take. A five-second "splitting this evenly?" before ordering avoids a five-minute negotiation after.
If people are paying in different currencies, convert as you go rather than trying to reconcile everything at the end. A running total in one currency is much easier to trust than mental exchange-rate math.
Waiting until the last day to settle a week's worth of expenses turns a simple transfer into an audit. Settling every couple of days keeps the numbers small and the mood light.
A reminder that comes from a tool, showing an exact number, feels like admin. A text from a friend saying "hey, you still owe me for the hotel" feels like a confrontation. Where you can, let the numbers speak.