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Splitting rent and bills with roommates: a fair system that lasts

October 22, 2026 · 6 min read

Rent is the biggest number you’ll ever split with friends, and the one most likely to cause resentment. Here are the three common ways to split it, when each is fair, and how to handle utilities and groceries.

Three ways to split rent

1. Equal split

Everyone pays the same. Fair when rooms are similar in size and quality. Simple and hard to argue with.

2. By room size

Each person pays in proportion to their room. Fair when one room is clearly bigger, has its own bathroom or a balcony. A popular compromise is to split half the rent equally (for shared space like the kitchen and living room) and half by room size.

3. By income

Each person pays a share proportional to what they earn. Common for couples, rarer for friends. It only works if everyone is genuinely comfortable sharing their income.

Utilities and internet

Split these equally unless usage is very different (someone works from home with a space heater all winter). Decide once, write it down, and don’t relitigate it every month.

Groceries: shared or separate?

Shared basics (oil, salt, toilet paper, cleaning supplies) work well as a common expense. Personal food usually doesn’t: one person’s oat milk and protein bars shouldn’t be split three ways. A shared expense list with only the right people ticked handles both.

Keep a running tab, settle monthly

Whoever pays a bill logs it. Once a month, the group settles with the fewest transfers. The person who paid the internet and the one who paid electricity often cancel each other out, so fewer transfers are needed than you’d think.

The roommate agreement in five lines

1. How rent is split (equal, by size or by income).
2. Which bills are shared and how.
3. What groceries are common.
4. Who logs what, and where.
5. Settle by the 5th of every month.

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