Not to be confused with a biweekly mortgage, this type of home loan is also known as 5/25s and 7/23s. It has one interest rate for part of the life of the mortgage and a different rate for the remainder of the loan.
Two steps are 30-year mortgages. They can either be convertible or nonconvertible. The 5/25s have a fixed interest rate for the first five years and either convert to a one-year adjustable rate or a 25-year fixed loan. The 7/23 has a fixed interest rate for the first seven years and then converts to a one-year adjustable rate or a 23-year fixed loan.
The initial rate on the two step is lower than on a 30-year fixed mortgage, but higher than a one-year adjustable. Also, because the adjustment interval is longer, there is less risk initially than with an adjustable rate mortgage, or ARM.