How to split expenses with roommates: an app setup that lasts
Put the whole household in one group, split rent by room with exact amounts or percentages, split bills and groceries equally, and settle once a month. In the worked month below, four flatmates log six expenses and clear everything with three payments. The setup works in any app with uneven splits; we show it in SuperSplit, which we make.
What does a roommate setup need to handle?
- Rent that isn't split evenly. The big room pays more, so you need exact amounts or percentages per expense.
- Bills that come every month. Rent, internet and electricity repeat. In SuperSplit, repeating bills that add themselves are a Pro feature; on the free plan you add them each month.
- Groceries and supplies. Split equally among whoever shares them, and leave out anyone who doesn't.
- People moving in and out. Settle a leaver's balance before they go, so the rest of the household can carry on.
How should you set up the group?
- Create one group for the household and choose its currency.
- Add everyone. A flatmate who hasn't installed the app can be added by name now and join later from an invite link or QR code, picking their name so earlier expenses stay attached to them.
- Log rent with exact amounts per room, or the matching percentages.
- Log bills and groceries as they happen, split equally, unticking anyone who isn't in on a purchase.
- Settle up once a month using the suggested payments.
Some households prefer separate groups for bills and groceries. That keeps each list tidy, but every group settles separately, which usually means more payments.
What does a month look like with real numbers?
Maya, Leo, Sam and Priya share a four-bedroom flat. Rent is €2,000, split by room size. This is their month:
| Expense | Paid by | Split | Amount |
|---|---|---|---|
| Rent | Maya | Maya €750, Leo €600, Sam €400, Priya €250 | €2,000 |
| Internet | Maya | Equally | €60 |
| Electricity | Sam | Equally | €110 |
| Groceries, week 1 | Leo | Equally | €140 |
| Groceries, week 2 | Sam | Equally | €120 |
| Groceries, week 3 | Priya | Equally | €120 |
| Total | €2,550 |
| Flatmate | Paid | Share | Net balance |
|---|---|---|---|
| Maya | €2,060 | €887.50 | +€1,172.50 |
| Leo | €140 | €737.50 | −€597.50 |
| Sam | €230 | €537.50 | −€307.50 |
| Priya | €120 | €387.50 | −€267.50 |
| Total | €2,550 | €2,550 | €0 |
Each share is that person's rent plus a quarter of the internet (€15), electricity (€27.50) and groceries (€95). Settle-up suggests three payments:
- Leo pays Maya €597.50.
- Sam pays Maya €307.50.
- Priya pays Maya €267.50.
Repaid bill by bill, the same month would be 12 separate debts, or six after netting each pair. How the payments are worked out.
What should you check before your household commits to an app?
- Daily limits on the free plan. Splitwise's free plan limits how many expenses you can add per day; Splitwise doesn't publish the number (details and sources). A big shop plus a bill or two on the same day can reach it.
- Uneven splits. You need exact amounts or percentages per expense for rent.
- Repeating bills. Check whether they're free or paid. In SuperSplit they're part of Pro.
- Who needs an account. If one flatmate won't sign up, can the app still track their share?
- Export. When someone moves out, a CSV beats a screenshot. In SuperSplit, export is part of Pro: PDF or CSV on iPhone, CSV on Android.
What if a roommate won't install the app?
- Add them by name. Their share still counts in every split and balance.
- Share the balances. SuperSplit can send the group's balances to your chat as an image or text, no app needed to read it.
- Use the web. If they want the details, they can open the group's invite link, sign in on the web and view the expenses and balances without installing anything. Adding expenses happens in the iPhone and Android apps.
How do you handle a roommate moving out?
Settle their balance before they leave and record the payment. The rest of the household carries on in the same group. Do it before the keys are returned; it's much harder to collect afterwards.
Quick answers
- What's the fairest way to split rent between rooms of different sizes? Agree an amount or percentage per room once, then enter rent with exact amounts or percentages each month.
- Should a couple count as one or two? Use shares: give the couple two shares of groceries, and split rent by room.
- Is a shared spreadsheet enough? For two organised people, maybe. Apps add mobile entry, automatic balances and a short list of payments to settle.
Run the household in one group.
Unlimited expenses and history, rent split by room, and a short list of payments each month. Free on iPhone and Android.
