Trip Cost Splitter

Split a shared trip fairly between people who paid different amounts.

Splitting a trip is not the same as dividing the total. Someone pays the accommodation, someone else drives, another books the restaurant, and at the end nobody is sure who owes what.

Enter what each person paid and how many people shared the trip, and this calculator shows who is owed money and who owes it, at the click of a settlement.

At a glance

What you enter: Person 1 paid, Person 2 paid, Person 3 paid, Person 4 paid, People sharing the trip, Adjustment for unequal shares
What you get: Total paid by the group, Fair share each, Person 1 balance, Person 2 balance, Person 3 balance, Person 4 balance
Formula shown: Yes - every step, right below your results.
Cost and privacy: Free, no account needed, and nothing you type is stored.

See worked examples ↓ Read the FAQ ↓ Share this calculator ↓

Person 1 paid

Person 2 paid

Person 3 paid

Person 4 paid

People sharing the trip people

Adjustment for unequal shares

Money to set aside before splitting, for example a private room one person paid for.

Reset

Results are estimates for general information only - always verify with a professional or official source before acting on them.

How to use the Trip Cost Splitter

1 Enter Person 1 paid
2 Enter Person 2 paid
3 Enter Person 3 paid
4 Enter Person 4 paid
5 Enter People sharing the trip (people)
6 Enter Adjustment for unequal shares - Money to set aside before splitting, for example a private room one person paid for.
7 Press Calculate. You get Total paid by the group, Fair share each, Person 1 balance, Person 2 balance, Person 3 balance, Person 4 balance, and every intermediate step stays visible under “How is this calculated?”
8 Change one number at a time to see what moves the result - that is usually the most useful thing a calculator can tell you.

Worked examples

Real numbers run through this calculator. Open any example to load it into the form above and change it.

Four friends where one paid most of the accommodation

$2,030 of shared costs paid by three of the four, split equally with no adjustment.

You enter

Person 1 paid: $1,250.00
Person 2 paid: $480.00
Person 3 paid: $300.00
Person 4 paid: $0.00
People sharing the trip: 4 people
Adjustment for unequal shares: $0.00

You get

Total paid by the group: $2,030.00
Fair share each: $507.50
Person 1 balance: $742.50
Person 2 balance: -$27.50
Person 3 balance: -$207.50
Person 4 balance: -$507.50

The group spent $2,030, so the fair share is $507.50 each. The first person paid $1,250 and is owed $742.50. The second paid $480 and owes $27.50, the third paid $300 and owes $207.50, and the fourth paid nothing and owes $507.50. Only the first person is owed money, so one set of transfers settles the whole trip, and the largest single balance is $742.50.

Open this example in the calculator →

Four travellers with a private room set aside first

$1,260 of costs with $120 set aside first for one person's private room.

You enter

Person 1 paid: $640.00
Person 2 paid: $320.00
Person 3 paid: $210.00
Person 4 paid: $90.00
People sharing the trip: 4 people
Adjustment for unequal shares: $120.00

You get

Total paid by the group: $1,260.00
Fair share each: $285.00
Person 1 balance: $355.00
Person 2 balance: $35.00
Person 3 balance: -$75.00
Person 4 balance: -$195.00

The total paid is $1,260, and after the $120 adjustment the amount being split is $1,140, so the fair share across four people is $285. The first person is owed $355 and the second $35, while the third owes $75 and the fourth owes $195. Those two debts total $270, which is exactly the $390 owed to the first two less the $120 private room that the first person covered on their behalf. Two people are owed money, so two transfers settle the trip, and the largest single balance is $355.

Open this example in the calculator →

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Frequently asked questions

Who is owed money, and how do I read a negative balance?

A positive balance means that person paid more than their fair share and is owed money. A negative balance means they paid less and owe it. With $2,030 paid between four people the fair share is $507.50, so the person who paid $1,250 is owed $742.50 and the other three owe amounts that add up to the same figure.

The balances always sum to zero before any adjustment, because every cost was paid by someone in the group. If they do not sum to zero, a payment or the number of people has been entered wrongly. The settlement line reports how many people are owed money, which is the number of transfers needed.

What is the adjustment field for?

It is money the group agrees to set aside before splitting, for a cost that was not shared equally. If one person had a private room, a spa treatment or a flight on a different date, that amount comes off the total first and the rest is split evenly. The adjustment is subtracted before the fair share is worked out.

It does not credit it to anyone in particular, so it works best when the group has already agreed who pays it. For anything more complicated than one or two exceptions, agree the shares separately and use the adjustment to remove the disputed amount from the split.

Should the whole trip be split, or only some of it?

The calculator splits everything that was paid and entered, so enter only what you want shared. Flights bought individually, a hotel room someone booked for themselves and personal shopping should be left out of the payment figures, because they were never part of the common pot.

Entering everything and then trying to correct it with the adjustment field usually produces a figure nobody can explain. Keeping the shared pot clean is the easier discipline, and it is what makes the balances believable to the group.

How does the tool handle a person who paid nothing?

Leave their payment at zero. They still receive an equal share of the total, so their balance is a negative figure equal to the fair share, which is what they owe. A fourth person who paid nothing on a $2,030 trip with a $507.50 share owes exactly $507.50.

If you raise the number of people above the payments you have entered, the extra shares are spread across everyone in the group, so a party of five where only four paid still produces five equal shares. Enter every traveller in the people field, whether or not they paid anything.