A lease can be a written or oral agreement. In Pennsylvania, leases for terms of more than three years need to be written.Seamlessly manage your month-to-month rentals in Pennsylvania with our Lease Agreement. Ensure legal compliance and confidently navigate flexible leasing. For a periodic lease (e.g. A Pennsylvania month-to-month rental agreement is a lease that can be canceled upon written 30-day notice from the landlord or tenant. In this section, we will discuss the three main types of lease agreements in Pennsylvania: residential, commercial, and monthtomonth leases. Some quick advice: never agree in advance to let people use security deposit towards rent. Pennsylvania allows both monthtomonth and yeartoyear tenancies. If you do not have a written lease, in most circumstances the law considers you to have an oral month-to-month lease.