It depends on what quilt I am making. If it is a Block of the Month - the material comes monthly and the price can include the backing or not. If it is a Mystery Quilt the material is bought at one time and sometimes the backing only. I have made 3 and working on 2 more, where I pick and choose as I go along from my stash for the blocks then buy the sashing and the backing when I am ready for it.