A Flatmate Leaves Without Notice: Who Pays the Debts?

Not every departure follows the rules. Sometimes a flatmate clears out their room overnight — a conflict, a snap decision, a fresh start elsewhere — without notifying anyone. What happens then, both for them and for those who stay?

Joint Liability Remains in Full

Leaving physically does not release you from anything. Without notice properly given, the flatmate who leaves remains jointly and severally liable for all the lease obligations — rent, charges, damage — exactly as if they still lived there.

The landlord, for their part, has no reason to concern themselves with the flatshare's internal arrangements: they can claim everything owed to them from any of the flatmates, including the one who left.

The Only Way Out of Joint Liability: Proper Notice

Joint liability does not end on its own just because the keys were handed back. To get out of it, the procedure must be followed: give two months' notice in Brussels, then either put forward a replacement accepted by the other flatmates, or demonstrate a sufficiently active search.

Without a replacement or a demonstrated search, joint liability continues for up to six months after the notice period would have ended (Brussels Housing Code, art. 260 §3). It is a ceiling — but one that assumes notice was actually given.

What This Means for the Remaining Flatmates

The rent remains due in full. The landlord can continue to claim full payment from the remaining flatmates regardless of the departure: the empty room is not their problem.

The flatshare agreement changes nothing about this joint liability towards the landlord — no agreement between flatmates is binding on them. What it does organise are the internal claims: who owes what to whom between flatmates, and on what basis to claim a share from the one who left.

Why a Clear Agreement Limits the Damage

An up-to-date agreement sets out the procedure to follow in the event of a departure, which makes an irregular departure far easier to identify: there is a clear gap, in writing, between what was agreed and what actually happened.

It also sets out what the remaining flatmates can do while the situation is being sorted out: restarting the search for a replacement, temporarily reallocating shares, documenting the steps taken. None of this wipes out the debt — but it all helps stop a failed departure from turning into a conflict between those who stay.

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