Which type of lease agreement has a beginning date but no fixed termination date, such as a week-to-week or month-to-month agreement?

The type of lease agreement that has a beginning date but no fixed termination date is known as a tenancy at will. This arrangement allows tenants to occupy a property for an indefinite period, typically with a notice requirement for termination from either party. The flexible nature of this type of lease makes it suitable for situations where the landlord and tenant may want a longer arrangement without committing to a fixed term, such as in week-to-week or month-to-month scenarios.

In contrast, sole ownership refers to property ownership by a single individual, while tenancy in common and joint tenancy pertain to forms of co-ownership between two or more people, both of which involve specific rights of ownership and implications for inheritance. None of these options provide the flexible duration characteristic of a tenancy at will.