Tenn. Code Ann. § 47-30-105

Notwithstanding any other law to the contrary, the parties to a reverse mortgage loan may contract for the payment of interest at a rate which does not exceed the rate permitted for home loans under chapter 15 of this title. Interest shall be deferred until the earliest occurrence of one (1) or more events specified in the reverse mortgage loan contract. Payment of interest on deferred interest shall be as agreed upon by the parties to the contract. The parties may agree that the deferred interest may be added to the outstanding balance of the loan.