1. Decide what counts as shared
Agree a short list of things everyone uses: basics like milk, bread, oil, spices, toilet paper and cleaning supplies. Anything only one person eats or drinks stays personal and is never split.
Free calculator
Splitting every grocery receipt evenly works until one roommate is vegetarian and another drinks all the oat milk. Add each receipt, who paid and who shares it, and get a split everyone can check, plus who pays whom.
Runs in your browser. Nothing is sent or saved. Add who lives in the flat, then each receipt or item, who paid, and who shares it.
| Roommate | Paid | Share | Balance |
|---|---|---|---|
| Alex | 126.00 | 55.00 | +71.00 |
| Sam | 18.00 | 64.00 | −46.00 |
| Jo | 24.00 | 49.00 | −25.00 |
How it works: each item is split evenly between the people ticked for it. Your balance is what you paid minus your share; the transfers settle every balance with as few payments as possible.
Agree a short list of things everyone uses: basics like milk, bread, oil, spices, toilet paper and cleaning supplies. Anything only one person eats or drinks stays personal and is never split.
Snap a photo of each shared receipt the day you shop. A mixed receipt is fine; just note the personal items so you can take them out.
Enter the receipt or item, who paid, and tick everyone who shares it. Vegetarians skip the meat, non-coffee drinkers skip the coffee, and the split stays fair without a debate.
The calculator nets out what everyone paid against their share and tells you who pays whom. Two or three transfers usually clear a whole month.
Settle groceries weekly or on the same day as rent. Small balances that sit for months are what turn into arguments.
Groceries are one part of shared costs. Use the rent split calculator and the utility split calculator for the monthly bills, and the free roommate bill agreement template to put the rules in writing.
Split shared basics evenly between the people who use them, and keep personal food separate. Ticking who shares each item, instead of splitting the whole receipt evenly, means nobody pays for food they never eat.
Sharing basics like oil, spices, cleaning supplies and toilet paper saves money and fridge space. Many flats share those and keep main meals separate. Agree the list up front and write it down.
Enter the shared part as one item ticked for everyone, and each personal item as its own line ticked only for that person. The calculator adds it all up so you only settle the difference.
Weekly or monthly both work, as long as it is a fixed day. Many flats settle groceries on rent day so there is only one money conversation a month.
Log each shared purchase in one place with who paid and who shares it, then settle on a fixed day. IPaid does this for free for one flat: add the expense, pick the shares, and everyone sees what they owe.
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