The roommate agreement: what actually needs to be in writing
Not a legal document. A one-page record of the eleven decisions every shared house makes anyway, usually by accident.
In this guide
A roommate agreement is a one-page record of decisions, not a legal contract. It needs eleven things: each person’s rent share and how it was calculated, who holds and pays each bill, how bills are split, the deposit contributions, notice required before moving out, who covers vacant days, guest and subletting rules, cleaning responsibilities, how shared purchases are owned, what happens to them when someone leaves, and how disputes get settled. Everything else is optional. Written on the day you move in, it takes an hour; written after a disagreement, it is a negotiation.
- The agreement exists to record decisions you have already made, not to impose new ones. If a clause needs a debate, have the debate — that is the point.
- A house agreement does not override your lease. Where they conflict, the lease wins and the landlord is unmoved by your internal arrangements.
- The two clauses households most often skip are notice period and shared purchases — and those two produce most of the arguments at the end.
- Sign it on the day everyone moves in, while nobody has anything to defend.
- Update it whenever someone joins, leaves or swaps rooms. An agreement listing a person who left last year is not a record of anything.
Most shared houses run on unwritten arrangements that work perfectly until the first thing goes wrong. Nobody wrote down what "your share" meant, so when the electricity bill doubles in January there are three sincere and incompatible memories of what was agreed in June. The agreement is not there because housemates cannot be trusted. It is there because memory is a bad storage medium for numbers.
The eleven clauses
| Clause | What it must state | Why it fails without it |
|---|---|---|
| Rent shares | Each person’s monthly figure and the method used to reach it. | "Equal" and "by room" both feel obvious to whoever proposed them. |
| Bill ownership | Which name each account is in and who pays it. | A bill in nobody’s name is a bill nobody chases. |
| Bill splitting | The percentages, and whether they match the rent split. | Flat-rate and usage-based bills are not the same problem. |
| Deposit | Exactly who paid how much, and to whom. | It comes back two years later, when nobody remembers. |
| Notice | How many days before someone moves out. | Without it, a departure becomes everyone else’s emergency. |
| Vacant days | Who covers an empty room between tenants. | The default falls on whoever stayed, silently. |
| Guests | How long a guest can stay before it is a tenancy. | The word "a few nights" has a wide range. |
| Cleaning | A rota or a paid cleaner and how it is split. | Effort is the one shared cost with no receipt. |
| Shared purchases | What was bought jointly, by whom, for how much. | A sofa has no owner until somebody moves. |
| Exit rules for those purchases | Buy-out at a depreciated value, or it stays with the house. | Arguing about a vacuum is never about the vacuum. |
| Disputes | Who decides, and by when. A majority, or a coin. | Unresolved disagreements do not expire, they compound. |
Eleven lines. One page. Nobody needs a template with a "whereas" in it.
The shared-purchase register
The clause households skip is the one about things. Rent and bills recur, so mistakes surface within a month. A jointly bought vacuum cleaner sits in a cupboard for three years and then acquires enormous emotional significance on the day someone packs a van.
An equal share is $158.33 each, with one person absorbing the extra cent. Dana paid $240 and is owed $81.67; Sam paid $95 and owes $63.33; Priya paid $140 and owes $18.34. Two transfers, on day three, and the register now says who owns what. When someone leaves, the rule agreed on day one applies — usually that the remaining housemates buy out their share at half the original price, since three years of use is most of a vacuum cleaner’s life.
Writing it in an hour
- Read the lease together first. You cannot agree anything that contradicts it. In particular, find out whether your tenancy is joint — meaning all of you are liable for all of the rent — because that single fact changes the notice and vacant-days clauses entirely.
- Settle the rent method before the rent numbers. Agree that you are splitting equally, by room size, or by income — then do the arithmetic. Arguing about a number is much harder than arguing about a principle.
- Assign each bill a payer and a split. Convenience decides the payer, the agreement decides the share. Flat-rate services usually split equally; usage-driven ones follow the rent percentages. Utilities have their own logic.
- Record the deposit line by line. Who paid what, to whom, on what date. This is the clause with the longest delay between writing it and needing it.
- Write the exit clauses while everyone is happy. Notice period, vacant days, buy-out rules for shared goods. These are the only clauses that get used under stress, which is exactly why they must be written when there is none.
- Everyone signs, everyone gets a copy. A photo in a shared album counts. What matters is that no single person is the custodian of the only version.
What a roommate agreement cannot do
- It cannot override the lease. If your tenancy makes all of you jointly liable for the whole rent, a clause saying otherwise binds nobody but you.
- It cannot make an unenforceable promise enforceable. In most places a house agreement is a private arrangement between people who trust each other. Its value is evidential, not coercive.
- It cannot substitute for a conversation. A housemate who has stopped paying is a conversation, and the agreement is only what makes that conversation short.
- It cannot cover everything. Aim for one page. An agreement long enough to need a contents page will never be read again.
The agreement is not for the day you sign it. It is for the day two of you remember June differently.
Pair the agreement with a shared expense record and you have covered both halves of the problem: the agreement says what was decided, and the record says what actually happened. Households that keep both spend almost no time discussing money, which is the entire point of writing any of it down.
Frequently asked questions
Is a roommate agreement legally binding?
What should be included in a roommate agreement?
When should you write a roommate agreement?
Who owns furniture bought together by housemates?
Do you need a roommate agreement if you are friends?
Priya R.
Editorial lead for Expenso’s shared-housing guides
Priya leads Expenso’s editorial work on rent splitting, shared bills and household agreements. Her guides turn common shared-money decisions into methods readers can check and reproduce.
