I plan trips for families of eight to twenty, and almost every budget argument I have witnessed was really an argument about which line was missing. A per-person number built from six clear figures settles it before anyone books anything, so this is the order I use on every group brief.
The six numbers, in order
Flights as their own line
Airfares move more than everything else combined, so I price them first and separately, per person, from the city you are flying from. Keeping them out of the accommodation figure stops the room cost from looking worse than it is, and it lets the group see which part of the trip is actually flexible.
Room or cabin cost, divided honestly
Take the property total, divide by the real occupancy, and write down the assumption. Two people in a triple share differently than three adults splitting a villa, and the number only stays peaceful when the maths sits in the document rather than in someone's head.
Meals and drinks on top
An all-inclusive quote and a villa with a kitchen land in different places, so I add a daily food figure per person based on how you actually eat. For mixed groups I assume two restaurant dinners a week and breakfast at the house, which keeps the estimate inside a range people can plan around.
Ground transport per head
Transfers, trains, ferries, parking and the rental car split, counted in one line. This is where group trips quietly leak money, because one coach for twelve costs far less than three taxis for four, and the difference rarely shows up until the final reconciliation.
One paid activity per day
I budget a single ticketed thing daily, in the middle of your likely range, then let free mornings absorb the rest. Two paid activities in one day is a choice you can make later, not a number the trip should be built on.
The buffer, at ten to fifteen percent
Weather days, a delayed ferry, a birthday dinner nobody planned. I set fifteen percent for international trips and ten for domestic, hold it centrally, and only spend it on the group with a note in the shared document.
Where the number usually breaks
Three places take the hit. Currency movement between deposit and balance, which is why I quote a range rather than a fixed total. A holiday-week surcharge on the property that appears after the first hold expires. And the headcount that drops at sixty days, leaving six people paying for eight. Each one is handled by a rule set early: the range in writing, the deadline on the deposit, and a replacement plan for a late drop.
A fourth leak is smaller and constant: the paid activity that is priced per person but booked for the whole party, where one no-show still costs a seat. I count those in the activity line at full headcount and treat any saving as a bonus rather than as money to spend twice. Numbers that hold up are the ones nobody has to revise in week two.
How the number reaches each person
I publish the six lines as one table with two columns: the estimate and the amount actually paid so far. Everyone sees the same figures, and the organiser stops being a collection agency, which is the part of group travel nobody volunteers for. Where a supplier quotes in another currency, I write the rate used and the date it was taken, so a small movement later reads as a movement rather than a mistake.
- Per person, with flights as a separate row above the total.
- Deposit, balance and activity fund, each carrying its own date.
- The buffer shown live, with a note on what it has covered.
Two columns also make the late drop straightforward. When someone pulls out at sixty days, the table shows which lines are refundable and which are not, and the replacement can be priced in one message instead of argued over for a week.
What each person actually owes
Once the six lines exist, I split them into a payment schedule with dates: deposit now, balance at ninety days, activity fund at thirty. Everyone sees the same table, the same totals and the same deadlines, and the organiser stops being a collection agency. Questions about the schedule go to the contact page, and the timing side of bookings sits in the trip planning timeline.
One rule sits at the end of the process: money the group does not spend from the buffer is returned at the reconciliation rather than held back for next time. It sounds minor, and it is the difference between people agreeing to the same range again next year and quietly offering less to protect themselves from a surprise.