This investigation was performed to provide information on the optimal broiler production, with emphasis on feed cost reduction by substitution of conventional protein inputs, with a novel black soldier fly larvae meal (BSFLM). Graded inclusion levels of BSFLM were substituted for full fat soy bean meal FFSBM) at 1.5%, 2.5%, 3.5%, 4.5%, and 5.5%. There was significant reduction ( p< 0.5) in marginal production cost (MPC) from 2.5% substitution levels. The MPC reduction showed positive progression at higher inclusion levels, the optimal inclusion was 4.5%. Other evaluated performance indices were growth rate, feed consumption, feed conversion efficiency, marginal cost analysis, quadratic programming, feed cost index, and profitability index. BSFLM substitution is indicated as a viable cost reduction strategy, for small and medium scale broiler production in the post-covid 19 economy. Key words; Post covid19 Economy, Feed cost reduction, Black Soldier Larva