Getting a new mortgage to replace the original is called refinancing. Refinancing is done to allow a borrower to obtain a better interest term and rate. The first loan is paid off, allowing the second loan to be created, instead of simply making a new mortgage and throwing out the original mortgage. For borrowers with a perfect credit history, refinancing can be a good way to convert a variable loan rate to a fixed, and obtain a lower interest rate. Borrowers with less than perfect, or even bad credit, or too much debt, refinancing can be risky.