An intumescent fire retardant coating is a substance when exposed to fire, it expands many time of its thickness forming as insulating layer of char which is strong enough to protect steel structure from fire and retain the structural integrity. Intumescent fire retardant coating has been developed by using Ammonium Polyphosphate (APP), Expandable Graphite (EG), Melamine (MEL), Boric Acid, Bisphenol A (BPA) and polyamide amine as a curing agent. Thus, local inorganic fillers which are alumina (Al203), aluminum trihydrate-ATH (Al (OH)3) and fumed silica added in the fire retardant materials. The main objective of this paper is to investigate the effect of local inorganic fillers on residual weight and char morphology of intumescent fire retardant coating. Intumescent fire retardant coating with addition of alumina fillers show greater residual weight and better char morphology. © 2013 Asian Network for Scientific Information.