A fixed-term lease does not usually remove your statutory tenancy rights, and after six months you may have security of tenure under Part 4 of the Residential Tenancies Act. Your landlord does not necessarily have to offer another fixed-term lease, but they generally cannot end the tenancy without following the legal rules and giving a valid reason where required. Ask for any proposed rent, term or other changes in writing, and check that any rent increase complies with the rules applying to your tenancy. The RTB can provide information, while a solicitor can advise on your specific circumstances.