If you're sharing a flat and all signing the same tenancy agreement, the words "jointly and severally liable" have big practical consequences. They mean that each of you is individually responsible for the entire rent — not just your share. Understanding this before you sign with flatmates could save you from a very expensive situation.
What It Means in Plain English
Say you share a flat with two other people. The total rent is £1,800/month. You each expect to pay £600.
Under joint and several liability, the landlord can demand the full £1,800 from any one of you. If one flatmate disappears or stops paying, the landlord doesn't have to split the chase. They can come to you — and only you — for the entire £1,800. You'd then have to recover your flatmates' shares yourself.
The real risk: If a flatmate loses their job, moves out without paying, or simply stops contributing, the remaining tenants are legally on the hook for the entire rent. The landlord has no obligation to pursue the non-paying tenant first.
How It Differs from Individual Leases
The alternative to a joint tenancy is an individual or room-by-room lease, where each person signs a separate agreement for their own room at their own rent. In that case:
- Each tenant is only liable for their own rent
- If one person doesn't pay, the others are not affected
- The landlord must pursue each tenant separately
Individual room leases are more common in purpose-built HMOs (Houses in Multiple Occupation) and student accommodation. Most standard shared flat tenancies use joint leases.
What It Means for the Deposit
Joint tenancy deposits are held as a single sum and protected under the tenancy as a whole. When tenants leave, deductions can be made from the entire deposit — not from each person's individual "share." This means one flatmate's damage can reduce what everyone else gets back.
Some landlords allow tenants to negotiate separate deposit contributions within a joint tenancy, but this is a private arrangement between the tenants — the landlord's legal relationship is with the joint tenancy as a whole.
Protecting Yourself
Joint and several liability is standard and usually unavoidable on a joint lease. But you can reduce the risk:
- Know your flatmates — sign with people you trust financially
- Create a flatmate agreement — a private document setting out each person's share of rent, how bills are split, and what happens if someone wants to leave
- Consider a tenants-in-common clause — rarely used in residential leases, but worth asking about if you have unequal income shares
- Check the landlord's process for replacing tenants — if a flatmate leaves, can a new one be substituted without a new lease?
Tip: A flatmate agreement isn't a legal document that binds the landlord, but it gives you written evidence of what was agreed between co-tenants — useful if you need to recover money from a flatmate who stopped paying.
Jurisdiction Notes
UK: Joint and several liability is standard in UK ASTs for multiple tenants. Each tenant is a "joint tenant" and holds the entire lease jointly.
US: Most US states follow the same principle for joint leases. Some states have specific rules about how and when a landlord must pursue individual tenants before the others.
Australia: Under state RTAs, co-tenants on a joint lease are jointly and severally liable. The same principles apply.
Canada: The Ontario RTA and other provincial acts treat joint tenants similarly — each is liable for the full rent.
Signing a joint lease?
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