Does someone who drops out still owe their share?

Yes, as soon as money has been committed in their name, which in practice means from the moment the accommodation is booked. Before the booking, pulling out costs nobody anything. After it, the house is already paid for and the group cannot absorb a whole share on its own. The only way to make that rule land well is to announce it before the first booking, with the exact date it starts to apply.

How much does a drop-out cost the others?

For a group of eight with a 1 240 euro house and a 320 euro activity, a drop-out twenty days before departure costs each of the remaining seven about 25 euros: 22 euros on the accommodation and 3 euros on the forfeited activity place. Five days out it rises to 28 euros. Food barely changes the figure, since you are now shopping for one person fewer.

Should you look for a replacement?

More than fifteen days out, yes: the share comes back down and the group stays complete. Inside a week, no, because adding someone who knows nobody to a fixed plan rarely works. Either way the replacement pays the same share as everyone else, and proposing a name is the job of the person who is leaving.

What do you do when someone stops replying altogether?

Send one message with a deadline: if there is no reply by Sunday, they are counted out, no hard feelings. Then move on. Non-answers are the most expensive kind of drop-out because they hold the booking while prices climb. Waiting another three weeks punishes seven people in order to spare one.

Is cancellation insurance worth it for a group trip?

It costs between 4 and 7 % of the trip value, so 50 to 85 euros on a 1 240 euro house. It starts to make sense once the rental is on a strict policy and the group is bigger than six, because the odds of at least one person dropping out get high. Simpler still: pick the refundable option when you book, often 40 euros more, which is 5 euros a head.

Someone dropped out of the group trip: who pays, how to recalculate, what to send

In a group of eight, somebody almost always drops out. That is not bad luck, it is arithmetic: the bigger the group, the higher the odds that one life changes shape over three months. So the drop-out itself is never the real problem. The real problem is that by the time it happens, nobody has ever said who pays. And it is that silence, not the extra 22 euros, that turns a trip people were looking forward to into six weeks of awkwardness.

The drop-out is not the problem, the vagueness is

Think back to a group trip that ended badly. Nine times out of ten the tipping point was not the person who pulled out. It was the message that followed: “so what do we do now?”. Nobody can answer, because nobody asked the question while things were still easy. So everyone improvises, and everyone improvises in their own favour.

The person who fronted 1 240 euros for the house would quite like that money back. The person pulling out never signed anything. The other six think it is unfair to pay for someone who is not coming, but would rather not be the one to say it out loud. Everybody is right, which is exactly why it does not resolve itself.

The good news: a three-sentence rule, set before the first booking, defuses almost every version of this. It needs no contract and no complicated kitty. It just needs to be said once, in writing, somewhere everyone will see it.

What a drop-out actually costs: a group of eight

Numbers help get out of the feelings. Take eight friends, four nights in a house half an hour outside Valencia, in June. Half the group flies from Dublin, half from Berlin.

House for eight, four nights: 1 240 euros, so 155 euros a head
Kayaking and paddleboard day, booked for eight: 320 euros, so 40 euros a head
Food, drinks and the hire car: 440 euros, so 55 euros a head
Flights: everyone buys their own, between 60 and 110 euros depending on the airport

Someone pulls out twenty days before departure. Here is the recalculation, line by line.

The house does not get cheaper because one bedroom is empty: 1 240 euros divided by seven is 177 euros a head, so 22 euros more each. The kayaking company keeps half of the cancelled place, so 20 euros is lost, spread over seven: 2,85 euros each. Food adjusts by itself, because you now shop for seven instead of eight, so the per-person share barely moves.

Real cost of the drop-out for each of the seven who are still going: around 25 euros. Five days out, when the house is no longer refundable at all and the activity is charged in full, it rises to 28 euros. Not nothing, but not a disaster either.

Hold on to that number, because it tells you the whole story. A drop-out rarely costs more than 30 euros a person. What costs a lot is not knowing who carries it. A group can absorb 25 euros in about two seconds. What it cannot absorb is three weeks of “we will sort it out closer to the time”.

The rule to set before you book, in three sentences

Send these three sentences to the group on the day you announce the per-person price, before anyone has fronted a cent. That is the only moment they land well, because they are not yet aimed at anybody.

Before we book, you can pull out and owe nothing, as long as you say so instead of going quiet.
Once the house is booked, your share is owed, whether you come or not. That is not a penalty, it is simply that the money has already left.
If you find someone to take your place, you get your share back, and finding them is your job, not the group's.

Three sentences, ten lines, and you have deleted the single most unpleasant conversation of the trip. Add the exact date the second sentence kicks in: “the house gets booked on Friday the 12th, after that shares are locked”. A date beats a principle every time.

If the group is bigger than eight, add a fourth line: a reply deadline. “Yes or no before the 20th, not “I will let you know””. Non-answers are by far the most expensive kind of drop-out, because they hold the booking hostage for weeks while prices climb.

The four kinds of drop-out, and the answer to each

They are not all the same, and treating them the same way is a mistake. In practice there are four.

The comfort drop-out: “I am just not feeling it any more”. The share stays owed, without argument and without a lecture. This is the exact case the rule covers, and the reason the rule exists.
The money drop-out: they said yes in September and work out in June that they cannot afford it. You prevent almost all of these by announcing a price cap, flights included, before you invite anyone. When it happens anyway, offer instalments rather than accepting a withdrawal: 177 euros in three payments often lands better than giving up the trip.
The genuine emergency: illness, a bereavement, redundancy, a relationship ending. Here the group absorbs it, and absorbs it fast. Twenty-five euros each against a friend who is already having a hard month is not a difficult sum. Say it out loud, or they will spend weeks feeling guilty in silence.
The ghost: no reply for three weeks. One message, with a date: “if I do not hear from you by Sunday I will count you out, no hard feelings”. Then move on. Waiting longer punishes seven people to spare one.

A share becomes owed the moment somebody fronts money, not the moment the trip starts.

One drop-out should not mean recounting everything.
Kobidi keeps the trip in one place: everyone proposes a date, a stay or an activity, the group votes, and the per-person price updates itself with every change. Free, and nobody needs to install anything to join.

Start the group trip, it is free Your friends join with a link, from any browser.

What you can get back, and what you cannot

Before you announce a new number to the group, check line by line what is still recoverable. Rough figures for 2026:

Holiday rental: on a flexible policy, a full refund up to 14 days before; on a strict policy, 50 % up to 30 days and then nothing at all. This is the heaviest line, so check it first.
Hotels and hostels: free cancellation until 6pm the day before in most cases, unless somebody booked the non-refundable rate, usually about 15 % cheaper.
Trains: a budget ticket is non-changeable, full stop. A standard ticket can be changed for a few euros up to the day before. Either way that ticket is the leaver's own loss, not the group's.
Flights: outside a flexible fare you get back only airport taxes, between 15 and 45 euros. Changing the name on a ticket often costs more than the ticket did.
Activities: free cancellation 48 hours ahead in most cases, 50 % kept between 48 and 24 hours, 100 % on the day.
Cancellation insurance: between 4 and 7 % of the trip value, so 50 to 85 euros on a 1 240 euro house. It starts to make sense as soon as the rental is on a strict policy and the group is bigger than six.

One habit prevents half of these problems: when you book, pick the refundable option even if it costs 40 euros more. Split across eight, that is 5 euros a head to remove the single most expensive risk in the trip.

Replacing them, or not

More than fifteen days out, looking for a replacement is almost always worth it: the share comes back down, and a full house is nicer than one with an empty bedroom. Inside a week, let it go. Dropping someone who knows nobody into a formed group with a fixed plan rarely ends well.

Two guardrails if you do replace. First: the replacement pays the same share as everyone else, not the leaver's original share. If they join after Saturday's activity has been paid for, they reimburse their place and that is it. Second: proposing a name is the job of the person leaving, not of the group hunting them an exit.

And if nobody comes, just state the new number. “We are seven, the share goes from 155 to 180 euros, nothing else changes.” One sentence, one figure, close the subject.

The message to send, and what it must not contain

The message that starts a fire always looks the same: “so, Niamh is out, not sure what that means, we will see”. Three pieces of information are missing, and all three will generate forty replies. The one that works has four parts.

The fact, in one line, with no explanation on the leaver's behalf. “Niamh is not coming any more.”
What does not change: the dates, the house, the plan. That is what the group wants to know first.
The new figure, calculated rather than guessed: “the share goes from 155 to 180 euros”.
What you need from them: “send me the difference at some point this week”. Not “let me know what you think”, which opens a debate where there is none.

What it must not contain: the detailed reason for the drop-out, any judgement of the person, or a request for a vote. The group does not get to relitigate a rule that was already set. If somebody wants to discuss it, that happens one to one, not in a thread of eight.

When the group is bigger than six

At six or more, the real cost of a drop-out is not financial, it is the recount. You have to go back through every expense, redo the division, check who had already paid what, and then convince seven people that the new figure is fair. One slip in the maths and you are the person who looks like they are helping themselves.

This is exactly where a shared space earns its keep: every expense sits in one place, each person's share recalculates itself when somebody leaves the trip, and everyone sees the same number at the same time. No rebuilding the spreadsheet, no convincing anyone: the figure is visible, so it is accepted. That is what Kobidi does, and it is free.

When someone drops out of the trip