How to keep track of who owes who on a group trip

October 7, 2026 · 9 min read · Dimesum Engineering

A trip's record runs for a week and settles once, so every rule can be agreed on the first evening. Nine steps from the first booking to the last transfer, worked on three days in London and three in Paris.

Six days, two currencies, four friends, one evening to settle it all. Keeping track of who owes who on a trip comes down to three habits: record every bill on the day, in the currency on the receipt, and name exactly who shared it. Dimesum does that bookkeeping for you, but the method below works with a notebook.

The short answer. Before the trip, start one shared record and agree a settle day. During it, write down each bill the day it happens: who paid, the amount in the receipt's currency, and the names of the people it was for. On settle day, work out each person's balance per currency as what they paid minus their share, then pay the largest debts to the largest credits until everyone is at zero.

What you need before the first bill

A trip differs from a shared flat in one way that changes everything: it ends. The flat's record runs for years and settles monthly, which is the case our guide to tracking shared expenses in a flat covers. A trip's record runs for a week and settles once, so every decision about it can be made on the first evening and never revisited.

You need four things in place. One record everyone can read, a sheet or an app, never four separate notes. The list of people on the trip and the days each is there.

A settle day, agreed now. And a currency rule, which for almost every group should be: each bill stays in the currency printed on its receipt. Write it with the receipt's own precision too: the euro and the pound have cents, and the yen, under the ISO 4217 currency list, has none.

If you want a sheet, our shared expense tracker template has the columns ready, and spreadsheet or app for shared expenses says where a sheet starts to break. If you are still choosing an app, the list of best apps to split travel expenses ranks them on exactly this kind of trip.

Nine steps from the first booking to the last transfer

Create one shared record with six columns: date, what, paid by, amount, currency, and who shared it.
Write the trip's people into the record, with the dates each person is there.
Agree a settle day, such as the last evening of the trip or the first Sunday after you get home.
Agree that every bill is recorded in the currency printed on its receipt, never the figure from a card statement.
Record each bill on the day it is paid, including deposits and bookings paid weeks before the trip.
Name the people who shared each bill, by name, instead of writing "everyone".
On settle day, total what each person paid and what each person's shares came to, separately for each currency.
Subtract each person's shares from their payments to get a balance per currency, and check that each currency's balances sum to zero.
Pay the largest debt in each currency to the largest credit in that currency, record the payment, and repeat until every balance is zero.

Step 6 is the one groups skip, and it is the one that goes wrong. "Everyone" means four people on Monday and three on Saturday, and a record that only says "everyone" cannot tell the difference. For a dinner where one person had the steak and another only a salad, split that one bill by item first, as in how to split a restaurant bill fairly. Step 8's zero check catches arithmetic slips before anyone sends money; the method behind step 9 is in how to settle up group expenses in fewer transfers.

The trip, worked: three days in London, three in Paris

Sofia, Tomás, Mei and Jonas spend three days in London and three in Paris. Sofia flies home a day early, so the last dinner in Paris is for three. Six bills in all.

Six bills from the London and Paris trip, with who shared each one
Bill	Paid by	Amount	Shared by	Each share
London flat	Sofia	£720	All four	£180
Pub dinner	Tomás	£148	All four	£37
River boat and museum	Mei	£64	All four	£16
Paris apartment	Jonas	€840	All four	€210
Bistro dinner	Mei	€176	All four	€44
Last dinner, after Sofia left	Tomás	€126	Tomás, Mei, Jonas	€42

In pounds, every bill was shared by all four, so each share is £233.

Sofia paid £720 and is owed £487. Tomás paid £148 and owes £85. Mei paid £64 and owes £169. Jonas paid nothing in pounds and owes £233.

In euros, Sofia's share is €254, because she missed the last dinner. Tomás, Mei and Jonas each have €296. Jonas paid €840 and is owed €544. Mei paid €176 and owes €120, Tomás paid €126 and owes €170, and Sofia owes €254.

Both sides sum to zero: £487 against £85, £169 and £233, and €544 against €120, €170 and €254. Six transfers settle the trip. Jonas pays Sofia £233, Mei pays Sofia £169 and Tomás pays Sofia £85. Sofia pays Jonas €254, Tomás pays Jonas €170 and Mei pays Jonas €120.

The edge case: dividing the total by four

The shortcut every group reaches for is to add up the euros and divide by four. The euro bills come to €1,142, so each person would owe €285.50. That shortcut charges Sofia for a dinner she missed because she was already on her train home.

Her real euro share is €254, so the shortcut overcharges her by €31.50. The three who ate the dinner each come out €10.50 ahead. It is a small sum, and it is exactly the kind of small sum that sits badly for a year, because Sofia noticed and did not want to be the one to bring it up.

Writing names instead of "everyone" in step 6 is the whole fix. Small gaps like this are how shared balances stop adding up.

A late arrival works the same way in reverse. A friend who joins on day three is named on day three's bills and no earlier ones. For an occasion where people come and go, a wedding weekend or a ski week, our guide to how to split costs for a group event works through deposits and late joiners.

Two currencies, and one optional shortcut at the end

Look at the transfers again. Jonas pays Sofia £233, and Sofia pays Jonas €254. Two people, sending money in opposite directions, in two currencies. They can replace both with one payment, but only by agreeing an exchange rate between them.

Say they agree €1.18 to the pound, worked out from the ECB's euro reference rate for sterling that morning. Sofia's €254 is then worth £215.25. Jonas owes £233, so after netting, Jonas pays Sofia £17.75 and the trip settles in five transfers instead of six.

That step is optional, and it belongs to the two people in it. If either of them would rather keep the euros in euros, the six transfers are exact and nobody has to trust a rate. What should never happen is a rate chosen silently on the day a bill was typed; we show why in multi-currency expense splitting apps, ranked.

The receipt is the record, the card statement is not

Step 4 is there because of one trap. In Paris, a card terminal may offer to charge a British card in pounds on the spot. That offer has a name, dynamic currency conversion, and the rate is set by the terminal's provider. The statement then shows a pound figure for a euro bill.

The group shared a €176 dinner, so the record says €176. Whatever Mei's bank or the terminal charged on top is the cost of how she chose to pay, and the group can decide to share it as its own line. Mixing the statement figure into the record is how a spreadsheet and an app end up a few pounds apart, which we unpick in why the app total differs from your spreadsheet.

How Dimesum does it in one step

Dimesum does the arithmetic of steps 7 to 9 as each bill is entered. Each bill names who shared it, each person's balance is kept per currency, and the settle screen proposes at most one transfer fewer than the people in the group, per currency. For the London and Paris trip that is the six transfers above, each in the currency it clears.

A friend with no account can still be named on bills: you add a kept place and they claim it later. An edit restates the whole split and keeps the old version, so moving the last dinner from four people to three leaves a trace; why that matters is in why an edit must restate its split. There is no daily limit on bills, which matters on a trip, since Splitwise's free tier stops at 4 expenses a day, as its help centre states as of 7 October 2026. Its Pro page lists unlimited expenses among what Pro adds; what the cap means for a trip is in Splitwise's daily expense limit.

A payment is recorded when the payer marks it and confirmed by the person paid, and Dimesum never holds the money. If the trip is just one dinner with someone who will not sign up, see how to split a bill with someone without the app.

Write names, not "everyone"

Record each bill on the day, in its own currency, with the names of the people who shared it, and settle once at the end, one currency at a time. Start the trip in Dimesum on the evening you book, and enter the first deposit before anyone forgets who paid it.

Common questions

How do you keep track of who owes who on a trip?

Keep one shared record and add each bill on the day it is paid: who paid, the amount in the receipt's currency, and the names of the people who shared it. On settle day, subtract each person's shares from their payments, per currency, and pay the largest debts to the largest credits until everyone is at zero.

Should a group divide trip costs equally?

Only bills everyone shared. Dividing the trip total by the headcount charges people for bills they missed. In our London and Paris example, splitting €1,142 four ways would have charged Sofia €285.50 when her real euro share was €254, because she flew home before the last dinner.

How do you split trip expenses in two currencies?

Keep a separate balance for each currency and settle each one in its own currency. Four people need at most three transfers per currency. Two people who owe each other across currencies can swap both debts for one payment, but only at an exchange rate they both agree and write down.

What if someone leaves the trip early or joins late?

Name them only on the bills they shared. A person who leaves a day early is left off that day's bills, and a person who joins on day three is added from day three. Recording names instead of writing everyone is the single habit that keeps their balance right.

When should a group settle up after a trip?

Agree a settle day before the trip starts, usually the last evening or the first weekend after everyone is home. Settling once at the end means far fewer payments than paying back each bill as it happens, and an agreed date stops the balance drifting for months while nobody wants to raise it.