A FRA is an agreement between you and the Bank to exchange the net difference between a fixed rate of interest and a floating rate of interest. This exchange is based on the notional amount you require for the term nominated. The net difference between the two interest rates is applied against the underlying asset.
For example, XYZ Corporation, who has invested on a fixed interest rate basis, has formed the view that interest rates are likely to rise. XYZ elect to receive variable for all or part of the remaining term of the investment using an FRA (or a series of FRAs, (see Interest Rate Swaps), while their underlying investment remains fixed, but hedged.