How should rent be split between roommates on one lease, and who owes what?
Roommates can split rent any way they agree, equally or by room size, but under a typical joint and several lease each of them owes the landlord the full rent. If one stops paying, the landlord can collect the shortfall from the others. Landlords keep it simple by taking one payment per unit or tracking each roommate's share against one combined balance.
Who owes the landlord
Most leases with more than one tenant say the tenants are "jointly and severally" responsible. Joint means they share the obligation; several means each can be held to all of it. The landlord is owed one rent for the unit, not three separate rents, and how the roommates divide it is between them.
Read your lease form. If it does not say how co-tenants share responsibility, add a clause that does, and have every adult on the lease sign it. Your state may also have rules about how shared promises are read; an attorney can tell you what applies.
Ways roommates split rent
| Method | How it works | Fits when |
|---|---|---|
| Equal shares | Rent divided by the number of roommates | Rooms are similar in size and features |
| By room size | Each pays in proportion to bedroom square feet | Rooms differ a lot |
| Half equal, half by size | Shared space split equally, bedrooms by size | A common compromise for uneven rooms |
| Premium for features | Equal shares plus a set amount for a private bath or parking | One room has something the others do not |
Example a made-up three bedroom unit rents for $2,400. The bedrooms are 160, 130 and 110 square feet, 400 in total. Using half equal, half by size: the equal half is $1,200, or $400 each. The size half is $1,200 split by area: $480, $390 and $330. Each roommate pays $880, $790 and $730, which adds up to $2,400.
As the landlord, you do not need to approve the split. You need the full rent, on time, and a clear record of who sent what.
When one roommate stops paying or moves out
Example a made-up roommate who pays $730 of the $2,400 rent moves out mid-lease and stops paying. Under a joint and several lease, the unit still owes $2,400. The landlord can look to the two remaining roommates for the full amount; they can then pursue the one who left for their share.
- Ask the remaining tenants how they plan to cover the rent, in writing.
- If they propose a replacement, screen that person like any applicant and add them to the lease by amendment before they move in.
- Do not release the departing roommate from the lease unless you mean to; a written release usually ends their responsibility going forward.
Some states let tenants add occupants without the landlord's choice. In New York, Real Property Law 235-f lets a single tenant share the unit with immediate family and one additional occupant (plus that occupant's dependent children). With two or more tenants on the lease, the total of tenants and occupants may not exceed the number of tenants named. The tenant must tell the landlord an occupant's name within 30 days, and an occupant gains no right to stay if the tenant leaves, unless the landlord agrees in writing.
The security deposit with roommates
One unit usually has one deposit. When a roommate leaves mid-lease, most landlords do not split the deposit then; the remaining tenants and the newcomer settle the departing roommate's share among themselves, and the landlord returns the whole deposit at the end, less allowed deductions, as the lease and state law say. Write down who the deposit will be returned to.
For the rules on deposit amounts and deadlines, see security deposit limits and return deadlines.
Collecting rent from roommates
- Decide whether you take one payment per unit or one per roommate. One payment is simplest; several is fine if each uses the unit's memo.
- Record every payment against the unit's single balance, with the payer's name in the note.
- Send late notices to every tenant on the lease, not only the one who usually pays.
- Treat a roommate's shortfall as the unit's shortfall; see partial rent payments.
How DoorKeeping handles it
In DoorKeeping, each unit has its own memo, such as 12B SMITH, and an exact amount, so payments from different roommates still point to the same unit. Rent goes straight to your own bank, with no fees for tenants. You can ask your AI app what a unit still owes this month and who has paid.
Sources
- New York Real Property Law 235-f, read Oct 29, 2026
Questions
- If my roommate does not pay, do I owe their share?
- Under a typical joint and several lease, yes: each tenant can be held to the full rent. You can then seek the share from the roommate who did not pay.
- Can a landlord collect rent separately from each roommate?
- Yes, if the landlord chooses. The unit still owes one rent, so the landlord should track each payment against the unit's single balance.
- Does a new roommate get a lease automatically?
- No. In New York, an occupant under Real Property Law 235-f gains no right to stay if the tenant leaves unless the landlord agrees in writing. Add new roommates by signed amendment after screening.