Bill splitter
A bill splitter answers one question: given this total, what does each person owe? The hard part is never the division — it is the service charge, the shared bottle, and the person who only had a starter.
The one rule that avoids most arguments
Always split the final total — the number actually charged — rather than adding up the individual items. If you split item prices and then try to add service on afterwards, you get rounding drift and someone ends up 40p short.
When people did have very different meals, the fair approach is still to start from the final total and apportion it, which is what the worked example below does.
Splitting a restaurant bill
Eating out is one of the most commonly split costs there is. In the UK, restaurants and hotels accounted for around 7% of average weekly household spending in the financial year ending 2024, according to the Office for National Statistics.[1]
Method 1: even split
Divide the final total by the number of people. Fast, and correct far more often than people expect — over a run of meals the differences average out.
Method 2: apportioned by what each person had
Use each person's share of the food and drink to apportion the whole bill, service included. This keeps the arithmetic honest without making anyone calculate 12.5% of their own main course.
Worked example: dinner for four with a service charge
Four people eat out. The food and drink comes to £128, and a 12.5% service charge brings the bill to £144. Dan only had a starter and tap water; the others shared two bottles of wine.
| Person | Their food and drink | Share of the bill | How |
|---|---|---|---|
| Ana | £42 | £47.25 | 42 ÷ 128 × 144 |
| Ben | £38 | £42.75 | 38 ÷ 128 × 144 |
| Cara | £36 | £40.50 | 36 ÷ 128 × 144 |
| Dan | £12 | £13.50 | 12 ÷ 128 × 144 |
Result: The four shares total exactly £144. Everyone pays service in proportion to what they ordered, and Dan pays £13.50 rather than the £36 an even split would have charged him.
In Expenddy this is an exact-amount split: enter £144 as the total and type the four figures. Expenddy checks that they add up to £144 before saving, so a mistyped share cannot slip through.
Method 3: shared items only
Sometimes the cleanest answer is to split only what was genuinely shared. Record the shared plates and the wine as one expense split between the people who had them, and let everyone pay for their own main course separately. In Expenddy that means choosing who is included on the expense — the single most useful control in the app, and the one most often ignored.
Splitting a household bill
Utility bills split differently from restaurant bills, because the fair ratio usually stays the same month after month while the amount changes. That is what percentage splits are for: set 60/40 once and every future bill divides correctly without anyone recalculating.
Worked example: an energy bill in one person's name
Three flatmates share an energy bill of £186. It is in Sam's name and paid from Sam's account by direct debit. They split it equally.
| Person | Share | Effect on balance |
|---|---|---|
| Sam (paid the bill) | £62 | Paid £186, owes £62 → owed £124 |
| Jo | £62 | Paid £0, owes £62 → owes £62 |
| Ravi | £62 | Paid £0, owes £62 → owes £62 |
Result: Sam is owed £124, which is exactly what Jo and Ravi owe between them. Recording the bill each month means Sam never has to ask twice, and the running balance shows at a glance whether anyone has fallen behind.
More on this pattern in managing shared household expenses and on the roommate expenses page.
Splitting a bill in Expenddy, step by step
- Open the group the bill belongs to, or create one if this is the first shared cost.
- Add an expense and enter the final total from the bill.
- Set who paid it. This is what separates 'spent' from 'owed'.
- Select the people who shared it — only those people, not everyone in the group by default.
- Choose the split method: equal, exact amounts, or percentage.
- Attach a photo of the bill if you want a record of it (mobile app).
- Save. Everyone's balance updates immediately.
The awkward cases
- Rounding. A £100 bill between three people cannot divide evenly. Expenddy handles the pennies so the shares always total the bill exactly — no drift, and no one-penny balances left behind.
- Someone paid part of the bill in cash. Record the bill in full against whoever paid the card, then record the cash contribution as a settlement from that person. The balances end up where they should be, and the history explains itself.
- A tip added afterwards. If the tip was left on top in cash by one person, record it as its own small expense split between whoever agreed to it.
- You are not sure the total is right. Record it anyway, with the receipt photo attached. An expense can be edited later, and a wrong number recorded is far easier to fix than a forgotten expense nobody can reconstruct.
Bill-splitting questions
Can Expenddy split a bill equally?
Expenddy splits bills equally by default. Choose the people sharing the expense and the total is divided evenly between them — a £120 dinner shared by four people gives each person a £30 share. The split recalculates automatically if you add or remove someone before saving.
Can Expenddy split an expense by exact amounts?
Expenddy supports exact-amount splits, where you type each person's share as a currency figure instead of dividing the total. Expenddy checks that the individual shares add up to the expense total and will not save the expense if they do not, so a typo cannot quietly leave the balances wrong.
Can I attach receipts to an expense?
You can attach a photo of the bill or receipt to a group expense, so the amount can be checked later without anyone hunting for the paper copy. Personal records and friend-ledger entries support attachments too.
Does Expenddy actually move the money?
Expenddy does not move, hold or transfer money, and it is not a bank or a payment service. You pay each other however you already do — cash, bank transfer, or any payment app — and then record in Expenddy that the payment happened. Expenddy is the record of who owes what, not the mechanism for paying it.
Sources
- Family spending in the UK: April 2023 to March 2024. Office for National Statistics, published 10 September 2025 — restaurants and hotels accounted for around 7% of average weekly household expenditure in the financial year ending 2024
External statistics above are published by the organisations named and are not Expenddy data. Statements about how Expenddy works describe the app itself.
Split a bill in under a minute
Record a shared expense, see the balance update, and settle it when the money moves.
Free to use. Available for Android and in any web browser. An iOS app is in development and is not released yet.