What is the fairest way to split rent among roommates?
Common methods are equal shares, by room size (square footage), or by income. Splitting by room size accounts for differing bedroom sizes and access to private bathrooms, while income-based splitting keeps housing affordable relative to each person's earnings. This calculator lets you compare all three approaches.
Are all roommates liable for the full rent?
On a joint lease, yes — roommates are usually jointly and severally liable, so the landlord can collect the entire rent from any single tenant. Individual leases (where each roommate signs a separate lease for a room) limit your liability to your own share, but they are less common.
How do we handle the security deposit between roommates?
Divide it in the same proportion as rent and keep a written record. Because the landlord holds one deposit for the unit, a departing roommate is normally paid back by their replacement, not the landlord. Document the unit's condition at move-in to avoid deposit disputes later.
What happens if a roommate stops paying their share?
On a joint lease the others must cover the shortfall to avoid a non-payment eviction that affects everyone. A written roommate agreement lets you pursue the non-paying roommate for their share. Consider requiring each roommate to keep a small reserve to cover a missed month.