Organic acid was administered to Japanese quails as 0.5, 1, 1.5 and 2ml of Aciflex® per liter of drinking water. Significantly low (P< 0.05) feed and water intake was found in 2ml group compared to the control group. Highest weight gain, best feed conversion ratio (FCR), dressing percentage, liver weight and lowest mortality were obtained in 2ml compared to the control. Significantly higher feed cost was observed in the control group, while it was the same in all other groups. However, gross return was not affected by organic acids supplementation. Net return was significantly higher in 1.5 and 2ml groups and was the least in the control group. It was concluded that organic acid supplementation in drinking water at the rate of 2ml/L of drinking water improved performance and economic return in Japanese quails.