Rental contracts are usually not expiring (there are exceptions). Each party can terminate the contract usually twice a year with a three month notice period.

Rental contracts are usually not expiring (there are exceptions). Each party can terminate the contract usually twice a year with a three month notice period. Termination must follow certain formality and it's slightly lopside to the renters advantage in that a renter can challenge a termination, while the landlord can't. Rent increases after a contract is terminated are possible within reason and within fair market value of the rent.