If a contract is due to end on a specific date, the tenant is simply obliged to complete his/her duties until that date.
However if the contract is tacitly renewable and if the tenant does not want to stay on, a notification must be sent to the landlord ahead of the 3 months’ notice.
In the instance when the rental agreement is tacitly renewed year on year, the tenant is expected to comply his/her duties until the end of the current contract year regardless of the given notice.
Some landlords are more flexible and will accept an earlier exit provided that the tenant or the appointed estate agent is able to find a new tenant to take over the rental property. This does not mean that the new tenant will “finish off” the existing contract, usually a new one is drafted.
The so-called “clause diplomatique” is often included in the contract. It allows the tenant to leave the property earlier than the set date on the one condition that he/she is relocated to another branch of the company, outside of Luxembourg. It does not apply when changing employer or when being let go. The 3-month-notice rule still applies and if the tenant leaves before the notice is up, payments and obligations must still be met until the end of it.