Roommates, Co-Tenants, and Who Owes the Rent

If several people sign one lease, each of them normally owes the landlord the whole rent, not a share of it. That is what "joint and several liability" means, and it is the single most consequential fact about shared housing. The landlord does not have to chase whichever roommate skipped; it may demand the full amount from whoever is easiest to collect from, and that person's remedy is to go after the others separately. Whether this applies to you depends on your lease and on your state's law, which is where every rule in this guide ultimately comes from — state law, and often city or county rules on top of it.

None of the following is a national rule. Notice periods, deposit handling, occupancy limits, lease-severance rights and the procedures for adding or removing a roommate all vary from state to state, and cities frequently add their own requirements. Read your lease first, then your state's landlord-tenant statute, then your city's housing agency. Cornell's landlord-tenant law overview is a reasonable orientation before you look up your own.

Why one lease means everyone owes everything

A lease is a contract, and when three people sign as tenants the usual reading is that all three promised the whole performance. Rent is $2,400. Roommates agreed privately on $800 each. One stops paying. The landlord is owed $2,400 and can sue any one of the three, or all three, for the full balance — the private split is not the landlord's arrangement and does not bind it.

This carries beyond rent. Damage to the unit, unpaid utilities billed under the lease, late fees, and in many states the landlord's costs in a successful case can all land on whoever is reachable. A judgment against one roommate is a real judgment, and it can show up in credit reporting and in future rental screening. Information on how debts and collections generally work is published by the Consumer Financial Protection Bureau.

Careful: Paying "your share" on time does not protect you if the total falls short. From the landlord's side, the rent is either paid in full or it is not, and a partial payment is usually just a partial payment — it can still support a nonpayment case against every tenant named on the lease, including the ones who paid.

There is an important alternative. Some buildings, particularly student housing and co-living operators, use separate "by the room" leases. Each resident signs an individual lease for a bedroom with shared access to common areas, and liability is individual: if your housemate defaults, that is between the housemate and the landlord. The trade-off is usually less control over who moves into the empty room. Which structure you have is answered by looking at your own lease — one document with several tenant signatures, or your signature alone on a room. Our walkthrough on reading a residential lease before signing shows where that language sits.

Co-tenant, subtenant, occupant: three different positions

Adding a person the right way

Most leases limit who may live in the unit and require written landlord approval to add anyone. Occupancy limits are typically set by a local housing code based on unit size rather than by the landlord's preference, and limits applied in a way that excludes families with children can raise fair housing questions — the HUD fair housing office handles complaints of that kind. The cleanest route is a lease amendment naming the new person as a co-tenant, signed by everyone. The alternative — quietly letting someone move in — risks a lease-violation notice and leaves the newcomer with no standing if the tenancy ends.

What a roommate agreement can and cannot do

A written agreement among roommates is worth having. It can fix the rent split, who pays which utility, how the deposit is divided at the end, notice required before moving out, guest rules, and what happens to a departing roommate's share until a replacement is found. Between roommates, it is an ordinary contract and generally enforceable in court.

What it cannot do is change the landlord's rights. A roommate agreement saying "Sam is responsible for one third" does not stop the landlord from collecting all of it from you. It simply gives you a written basis to recover from Sam afterward, usually in small claims court, where filing is inexpensive and lawyers are often unnecessary. Small claims procedures, limits and filing costs are set locally, so check your own county court's page rather than assuming a figure.

Tip: Write the roommate agreement at move-in, when everybody is friendly, and include the boring parts: how much notice before leaving, who finds the replacement, how the deposit is settled, and who holds the utility accounts. The agreements that get used are the ones written before the dispute.

When someone leaves, and when things go wrong

A co-tenant who moves out early usually remains liable. The lease continues, and the departing roommate's obligation continues with it unless the landlord agrees in writing to release that person. Some leases include a substitution or replacement clause setting out how a co-tenant may be swapped, typically requiring an application, a screening, and a signed amendment. Absent that, a release is a negotiation. Get it in writing and make sure it says the departing tenant is released from future obligations — not merely that a new person was added. Where the exit is driven by a military order, a safety concern or a health issue, a state statute may create a termination right; see breaking a lease for military service, safety or health.

As of mid-2026, many states have lease-severance statutes for survivors of domestic violence, allowing a tenant to end their own obligation, and sometimes to have the abuser's tenancy terminated instead, on documentation such as a protective order. The proof required, the notice period and the effect on the remaining tenants differ substantially by state, and some cities add protections. If this is your situation, look for your state's specific statute and a local victim services program before giving notice.

The security deposit is another source of friction. On a single shared lease the deposit is usually treated as one sum, held under the lease and returned as one payment at the end, commonly to whoever is designated or simply to the last known address. Landlords are generally not obliged to split it or to refund a departing roommate's portion mid-tenancy. That makes the deposit a roommate-agreement question: decide in advance whether a departing roommate is bought out by the incoming one, and document it. What happens to items left behind is covered in our guide on storage of a tenant's belongings after a move-out.

Finally, the hard rule. A roommate cannot evict another roommate by changing the locks, removing belongings, shutting off utilities or making the place unlivable. Self-help eviction is prohibited in most states and often carries damages, even between people who share a kitchen. If a co-tenant needs to be removed, that is generally the landlord's action through a court process, not yours. Where the person is an occupant with no lease, many states still require a formal proceeding. If the problem is behavior rather than rent, the concept your state may use is nuisance, and the underlying contract framework is summarized at Cornell's entry on leases. General agency directories are at USA.gov, and related situations appear across our renting and city housing guides.

Common questions

My roommate moved out and stopped paying. Can I make the landlord go after them instead?

Generally no. Under joint and several liability the landlord chooses whom to pursue and is not required to split the claim or to chase the person most at fault. Your recourse runs the other direction: pay what is owed to protect the tenancy, then sue the departed roommate for their share, usually in small claims court. A written roommate agreement, rent records and payment receipts make that case considerably easier to prove.

Can I change the locks on a roommate who is making the apartment unbearable?

No, and it can be expensive. Locking out a co-tenant, removing their belongings or cutting utilities is self-help eviction, which is prohibited in most states and often exposes you to damages and attorney fees. Even an unlisted occupant who has been living there usually must be removed through a court process. Talk to the landlord, document the conduct in writing, and if there is a safety issue, contact local authorities rather than handling it yourself.

How does the security deposit get divided when only one of us leaves?

Usually it does not get divided at all. On a shared lease the deposit is typically one sum held until the tenancy ends, and the landlord generally has no duty to refund a portion when one roommate departs. The practical solution is a buyout: the incoming roommate pays the departing one directly for their share, documented in writing. Settle this in the roommate agreement before anyone needs it.

Practical moves, in order