Guide · 6 min read
How to split rent fairly with roommates
Equal splits are simple, but they’re not always fair. Here are four common methods, worked examples, and a way to agree on one without a fight.
By the SplitBank team · Updated
There is no single correct way to split rent. What matters is that everyone agrees on the rule before the first payment, and that the rule reflects real differences between rooms and people. Below are the four methods most households use.
1. Split rent equally
Divide the rent by the number of people. It is the simplest method and works well when rooms are roughly the same size and everyone uses the shared space equally.
| Each roommate | $800 |
|---|
2. Split rent by room size
Give each bedroom a weight based on its size or features, and split the rent in proportion. A common approach is to split the shared space equally and the private space by square footage.
- Decide how much of the rent pays for shared space (kitchen, living room, bathroom) — often 40–60%.
- Split that part equally.
- Split the remainder in proportion to each bedroom’s size.
- Add small premiums for extras such as a private bathroom or balcony if everyone agrees.
| Shared part (50%) | $1,200 → $400 each |
|---|---|
| Private part | $1,200 split 150 : 120 : 90 |
| Largest room | $400 + $500 = $900 |
| Middle room | $400 + $400 = $800 |
| Smallest room | $400 + $300 = $700 |
The three shares still add up to exactly $2,400.
3. Split rent by income
Each person pays the same percentage of their income. Couples and close friends with very different incomes often prefer this, because the cost feels equally heavy for everyone.
| Total income | $10,000 |
|---|---|
| Partner A (60%) | $1,440 |
| Partner B (40%) | $960 |
4. Use a hybrid
Plenty of homes mix methods: rent by room size, but utilities and groceries split equally because everyone uses them about the same. The important part is to write the rule down so nobody has to remember it.
What about utilities and shared supplies?
- Internet and streaming: usually equal — everyone benefits the same.
- Electricity and heating: equal, unless someone works from home or runs a space heater all winter.
- Groceries: split shared staples; keep personal food separate.
- Deposits: split in the same proportion as the rent, and write down who paid what.
How to agree on a method
- Measure the rooms and list any extras before anyone chooses a room.
- Work out the numbers for two or three methods side by side.
- Pick one together, and agree when you’ll revisit it (for example, at lease renewal).
- Put the rule somewhere everyone can see it.
Setting it up in SplitBank
Create a Home group and add the rent as an expense. Choose “By shares” for a room-size split (for example 9, 8 and 7 shares for the example above) or “By percentages” for an income split, then set the expense to repeat monthly. Add utilities as separate expenses split equally. Balances update automatically, and simplify debts keeps the monthly settle-up to as few payments as possible.
Frequently asked questions
Only if everyone agrees it is. When the size difference is noticeable, a room-size or hybrid split is usually seen as fairer.
Most households split it in the same proportion as the rent, and record who paid it so each person gets the right amount back when the lease ends.