The current trends in magnetic device designs favor the electrodeposited 2.4 T CoFe films due to their ultimately high magnetic moment and relatively low coercivity. The optimum properties of these films are largely function of the additive design in the electrodeposition solution. Saccharin is the most commonly used one and, for this reason, the focus in this article is on reviewing the current understanding and phenomenological description of saccharin effects on properties of electrodeposited 2.4 T CoFe films. (C) 2012 Elsevier Ltd. All rights reserved.