Microbial-induced calcite precipitation is proven to be a sustainable biological ground improvement technique for sandy soils. Black cotton soil, being an expansive soil needs improvement and reduction in plasticity to minimize swelling, consequently improving shear strength. Microbial precipitation of calcite crystals binds soil properties, causing agglomeration and its efficacy in improving geotechnical properties of fine-grained inorganic clays need investigation. In this context, the present study, uses sporosarcina pasteurii as a medium to alter the geotechnical properties, mainly plasticity characteristics. Hand mixing of bacterial solution was done at a room temperature in order to simplify and stimulate for ease of its field application. The effect of remolding water content obtained from compaction test, in terms of three different water content corresponding to 95% of maximum dry density and at optimum water content was assessed. Gravimetric analysis was performed to optimize the bacterial concentration in terms of curing period and percentage of bacterial solution indicated 8% bacterial solution to be optimum in terms of maximum CaCO3 precipitation. Variation of pH measured at 8% bacterial solution indicated pH in the range of 7.26 to 7.66. Variation plasticity index at 8% bacterial solution indicated reduction with increase in curing period. Scanning Electron Microscopy of black cotton soil with 8% bacterial solution cured at 7 days indicated presence of white patches/coating over the clay particles leading to flocculation.