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Split expenses calculator

Split the bill after a party, a weekend away, a hens or bucks do, or a group gift. Add who paid what, and it works out who owes who and settles up in the fewest transfers. Handy when it's more than going halves.

Who's in

Everyone sharing the costs.

What was spent

One line per bill or receipt. Untick anyone who wasn't in on it.

  • Expense 1
    Split between

Settle up

Fill in the form and it adds up here.

Add what somebody paid, and who paid it.

How to split expenses with friends

  1. Add who's in. Everyone sharing the costs, by first name. A couple who settle up together can be one name.
  2. Add what was spent. One line per bill or receipt: what it was for, the amount and who paid. It's split between everyone unless you untick the people who weren't in on it.
  3. Settle up. The receipt shows what each person paid, their share, and who pays who. Copy the summary into the group chat, or copy a link that opens the same split on everyone's phone.

How we work it out

No rules of thumb here, just careful arithmetic. Every amount is kept in whole cents, so nothing gets rounded and everything adds back up.

  • Even shares. Each expense is split evenly between the people sharing it.
  • Spare cents. When an amount doesn't divide to the cent, the spare cents are dealt out like cards, one each to the people sharing it, in the order you added them. The next spare cent between the same people goes to the next person along, so nobody gets a second until everyone's had one. $100 three ways is $33.34, $33.33 and $33.33.
  • Balances. What you paid, less your share of everything you were in on. Above zero you get money back, below zero you owe. Everyone's balances add up to exactly zero.
  • Settling up. It looks for groups of people who can square up among themselves, then has the biggest debt pay the biggest credit inside each group until everyone's even. It never takes more than one transfer fewer than the number of people.
  • The fewest transfers. With up to 16 people owing or owed, it checks every way of grouping them, so you get the fewest transfers possible. Past that it uses the quick version.
  • Everyone means everyone. An expense split between everyone takes in people you add later. Pick people instead and it stays with them, even if you've picked everybody.
  • Up to 30 people and 100 expenses, and up to $100,000 an expense.

Tips for settling up

Agree on the split before anyone buys. Say up front what's shared and what isn't, like drinks for the people drinking.

Snap the receipts. A photo in the group chat saves an argument later.

Settle within the week. Send the summary while everyone still remembers the weekend.

Couples can be one person. Add them as one name, like "Sam+Jo", if they settle up together.

Sort the food before the shopping. A bring a plate list means fewer receipts to split, and the party food calculator stops anyone buying twice what you need.

Collect up front next time. For a gift or a booking, ask everyone to chip in before you pay, so you're not chasing anyone after. A HeadsUp invite can run the chip-in for you.

See all the free tools

Questions

How do you split a bill that doesn't divide evenly?

To the cent, with the spare cents handed out one each. $100 three ways is $33.34, $33.33 and $33.33, so it still adds up to $100. Split another $100 between the same three and the spare cent goes to the second person, then the third, so nobody wears them all.

How does it work out who pays who?

Say Alex paid $300 for the house, Sam $90 for groceries and Jo $30 for petrol, split four ways with Kim. That's $420, or $105 each. So Kim pays Alex $105, Jo pays Alex $75 and Sam pays Alex $15. Three transfers and everyone's square.

What if not everyone shares a cost?

Untick whoever wasn't in on it. If Sam also bought $60 of wine for just Alex and Sam, their shares go up $30 each. Then Kim pays Alex $105, Jo pays Alex $60 and Jo pays Sam $15.

Can someone pay for something they're not sharing?

Yes. Pick them as who paid and untick them from the split. If Alex buys a $50 gift from Sam and Jo, Sam pays Alex $25 and Jo pays Alex $25.

Why can it take fewer transfers than people?

It's never more than one fewer than the number of people, and often less. If Alex paid $40 for dinner with Sam and Jo paid $70 for a taxi with Kim, it's just Kim pays Jo $35 and Sam pays Alex $20. Two transfers for four people.

Is my split saved or sent anywhere?

Nothing you type is sent to us. The split stays on this device until you start again, and the link you copy carries it after the #, the part of a web address your browser never sends to a website. Anyone with the link can see the names and amounts, so keep it to the group.

Does it work for a kitty, going halves or a hens weekend?

Yes, for anything where different people paid for different things. Going halves is just two people on one expense. For a hens or bucks weekend, add the bride or groom and untick them from the costs the rest of you are shouting. A kitty is money collected before anyone spends, so this is the other way round: it squares up after.

Can I split by percentage or in another currency?

No. Each expense is split evenly between the people sharing it, and amounts are in dollars and cents. For an uneven split, put the uneven part on its own line and pick who shares it, like the drinks for the people drinking.

Do we all need an app or an account?

No. It runs in your browser, with nothing to download and no sign-up. One person fills it in and sends the summary or the link to the group.

How many people and expenses can it take?

Up to 30 people and 100 expenses, and up to $100,000 an expense. Plenty for a big weekend away.