A roommate agreement is a written deal between the people sharing a home: how rent and utilities are split, what the house rules are, and what happens when someone wants to move out. It exists because the lease does not cover any of that.
To the landlord, co-tenants are usually jointly and severally liable: each roommate can be pursued for the full rent. The roommate agreement is what makes the internal split enforceable between the roommates themselves.
Why a handshake is not enough
Most roommate disasters follow the same script: everyone agrees verbally, memories diverge, and the person whose name is on the lease ends up covering the shortfall. A signed agreement fixes each person's share, sets a notice period for leaving, and gives the remaining roommates a document they can enforce in small claims court if a departing roommate skips their last month.
The landlord is not bound by your split
If the lease makes you jointly liable, the landlord can demand the full rent from any one of you regardless of what this agreement says. The agreement's job is to let you recover from the roommate who did not pay.
What a solid roommate agreement covers
- Exact rent shares (equal, by room size, or negotiated) and payment mechanics
- Utility split and whose name each account is under
- Security deposit contributions and how refunds are divided
- Overnight guests, quiet hours, cleaning, pets, and smoking
- Notice a departing roommate must give, and replacement rules
- Late-fee responsibility when one share arrives late
When a roommate moves out
The move-out clause is the one you will actually use. This template requires written notice (30 days is standard), keeps the departing roommate responsible for their share through the notice period, and obligates them to cooperate on a replacement. If the lease requires landlord approval of new occupants, get it in writing before the replacement moves in, and update the deposit accounting so the departing roommate's share is settled cleanly.
Frequently asked questions
Is a roommate agreement legally binding?
Yes, between the roommates. It is a contract enforceable in small claims court for unpaid shares or deposit disputes. It does not bind the landlord, who relies on the lease.
What if only one of us is on the lease?
Then the leaseholder is effectively subletting to the others, and this agreement documents the arrangement. Check the lease first: many require landlord consent for additional occupants, and a formal sublease agreement may fit better.
Can we evict a roommate who breaks the rules?
Roommates generally cannot evict each other; eviction is between landlord and tenant. Your remedies are the agreement itself (small claims for money owed) and, in serious cases, asking the landlord to act. The notice clause is designed to make voluntary exits orderly.
How should we handle the security deposit?
Record what each person contributed. When one roommate is replaced mid-lease, the incoming roommate typically buys out the departing one's share directly, so the landlord's accounting stays untouched.
Does the agreement need to be notarized?
No. Signatures of all roommates make it binding. Give everyone a copy, ideally alongside the lease so the two documents travel together.