A tenancy-at-will is a property tenure that can be terminated at any time by either the tenant or the owner/landlord. It exists without a contract or lease and it usually doesn't specify the duration of a tenant’s rental or the exchange of payment. The agreement is governed by state law and the terms can vary by state, although federal law comes into play in cases of discrimination.

“Estate-at-will” is another name for a tenancy-at-will.