The expand of poultry industry especially for broiler chicken due to gaining in white meat consumption by human give a good effect to poultry feed manufacturer. However, in poultry industry, the price of raw material become the main problem especially the price of protein source is. Due to this matter, the aim for this study was to determine the optimum inclusion using Black Soldier Fly Larvae (Hermetia illucen spp) (BSFL) as protein source to substitute or lessen the use of fish meal and soybean. In this study, the feed formulation for male Cobb sp. breed chicken was done using Microsoft Excel which was equipped the nutrient data for each ingredients. The feed was formulated according male Cobb sp. requirement with different inclusion of defatted BSFL which were 0%, 20%, 40% and 60% for every phase starter, grower and finisher. The feed was formulated in mash form for starter and pelleted for grower and finisher to enhance the palatability. The cost and composition of ration formulations were recorded. All 12 ration formulation were then analyzed to identify the nutrient and chemical composition content. The data was analyzed using one way Anova method and Tukey test. For starter, treatment 40% was the best formulation as it had the highest ME compared to others while for grower, treatments 20% was the closest ration with the recommendation same goes with treatment 60% that has highest ME which is good for finisher in order to gain weight and carcass. For cost benefit analysis, treatment 20% has the best cost benefits among all.