Guides to shared expenses

These do the arithmetic for you, in the browser: no account, nothing stored, nothing sent anywhere. There is a short guide to which one to use if you are not sure.

• Holidays, weekends away, road trips

  Trip expense calculator

  Split a rental by the nights each person actually stayed, using any of three methods, then add every other trip cost and settle the whole thing.

• Flats, dinners, events, any shared costs

  Group expense calculator

  Enter every expense with the person who paid it and the people who shared it. Get each person's balance and the payments that clear the group.

Dividing a cost between people, and choosing how.

• How to split expenses with friends

  The habits that keep friendships intact: agree the rules first, record at the moment of payment, and settle in one transfer rather than many.

• How to split a restaurant bill

  Even split, itemised split, percentage split, or shared-items-only — with the arithmetic for service charge and drinks worked through.

• Equal, exact or percentage: choosing a split method

  A decision table for the three split methods, plus the failure mode of each one and how to avoid it.

Rent, bills and the costs of living with other people.

• How to manage shared household expenses

  Which household costs suit which split method, how to handle a bill in one person's name, and what to do about the shared-groceries problem.

• How to split bills with roommates

  Unequal rooms, mid-month move-ins, the deposit problem, and a checklist for when someone moves out.

Travelling in a group, where money moves fastest.

• How to track expenses on a group trip

  Record as you go, keep currencies separate, and end the trip with one transfer per person instead of a spreadsheet.

Money between two people, with nothing to divide.

• How to track money friends owe you

  A running ledger beats memory and beats a group chat. What to record, and how to raise it later without friction.

How to keep a record that still makes sense months later.

• How to manage shared expenses without spreadsheets

  The four specific ways a shared spreadsheet fails, and the properties any replacement needs.

• How to keep track of group expenses

  Capture at the moment of payment, keep one ledger, and annotate anything unusual — the three habits that make a record hold up.

Closing out a set of shared expenses.

• How to settle shared expenses fairly

  Agree a cut-off, minimise transfers, and handle the two hard cases — a disputed amount and an expense nobody can verify.

The expense splitter is the reference for the three ways Expenddy divides a cost — equally, by exact amounts, or by percentage — with the arithmetic for each and a decision table for choosing between them. The bill splitter covers one bill between several people, including service charge and items only some people shared.

For what the app itself does rather than how to handle a situation, start with features, how it works, or the FAQ. The comparisons cover Expenddy against spreadsheets, group chats and splitting by hand.