A month-to-month tenancy is a periodic tenancy or lease in which the tenant is given possession of the leased premises with no specific expiration date and agrees to pay the landlord on a monthly basis. A month-to-month tenancy often requires the tenant or the landlord to give the other party 30 days written notice of termination of the lease.

Both residential leases and commercial leases may be month-to-month tenancies. If a residential or commercial tenant remains in the leased premises and continues to pay rent following the expiration of a lease for a longer term, there may be a new month-to-month tenancy created and recognized by law.

In Maryland, a month-to-month tenancy is recognized as a form of periodic tenancy where the tenant occupies the property with no definite lease end date and pays rent monthly. This arrangement can be established either through an explicit agreement or by implication when a tenant remains in the property after the expiration of a fixed-term lease and continues to pay rent, with the landlord's acceptance. Maryland law typically requires either the tenant or the landlord to provide at least one month's notice, or 30 days' written notice, to terminate a month-to-month lease. This notice period allows either party to end the tenancy without cause, as long as the notice is given in accordance with the lease terms and state law. It's important to note that local jurisdictions within Maryland may have additional regulations that affect month-to-month tenancies, so it's advisable to consult with an attorney or review local laws for specific requirements.