An experiment was conducted to evaluate the effect of dietary incorporation of acid treated fish silage (AFS) on performance and cost economics of broiler chickens during 0 to 6 weeks of age. Control starter (0-3 wk) and finisher (4-6 wk) diets were formulated to meet all the nutrient requirements of broiler chickens. Subsequently two test diets were prepared by incorporating acid treated fish silage at 5 and 10% level. Each diet was offered ad libitum to 3 pens of 20 chicks each in each treatment throughout the experimental period of 0-6 weeks. Dietary incorporation of AFS at either 5 or 10 % level had no influence on body weight gain and feed conversion ratio of broilers during 0-6 weeks of age. However, feed consumption was significantly higher in the birds fed diet incorporated with 5% fish silage compared to that of 10%. The feed cost per kg live weight gain was significantly (P<0.05) lower in the dietary group containing 10% fish silage compared to control diet and 5% fish silage group during 0-6 weeks period. There was a saving of Rs 5.06 per kg live weight gain when 10% fish silage was incorporated on air dry basis compared to control diet. It is concluded that dietary incorporation of acid treated fish silage up to 10% in broiler diet is not only economize the cost of production but also provides a safe methodology to mitigate pollution from fish waste.