A tenancy does not end when a fixed term lease expires, unless:
The landlord or the tenant gives proper notice to end the tenancy for a reason permitted in the RTA.
The landlord and tenant both agree that the tenancy will end.
The LTB or the court has issued an order ending the tenancy.
Otherwise the tenancy will renew automatically with the same terms and conditions. However the tenancy will become a month-to-month agreement instead of a yearly one, or a week-to-week agreement if the tenant pays rent weekly. Refer to the Ontario Landlord & Tenant Board for further information.