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 Connecticut, 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. For termination of a month-to-month tenancy, Connecticut law generally requires either the landlord or the tenant to provide at least one month's notice, or a notice period as agreed upon in the lease, before the rent is due. This notice must be in writing. The rules governing month-to-month tenancies in Connecticut are designed to provide flexibility for both parties while ensuring that proper notice is given prior to terminating the rental agreement. It's important to note that specific notice requirements and tenant protections can vary depending on local regulations and the terms of the lease agreement.