What type of tenancy has no specified period or termination date?

Tenancy at Will is characterized by its lack of a specified duration or termination date. This type of tenancy is fundamentally flexible, allowing either party—the landlord or the tenant—to terminate the arrangement at any time without advance notice, although practice and local laws may necessitate some form of notification. It exists at the discretion of both parties and does not establish a formal term or end-date for the rental period.

In a context where the other types of tenancies are defined, such as periodic tenancies that operate on a recurring basis (like month-to-month), tenancy for years which specifies a fixed duration, and fixed-term tenancies that also have an established end date, the distinctiveness of a tenancy at will becomes clear. This unique feature of having no fixed duration or definitive endpoint makes it an important aspect of real estate law, as it offers both flexibility and potential uncertainty for both the landlord and tenant.