A floor system plays an important role in overall cost and service of the building. Flat plate/slabs are economical since they have no beams and hence can reduce the floor height by 10-15%. In this paper analysis of RC flat slab with drop and post-tensioned flat slab with drop is carried out. This analysis is done for ground floor slab level and G+2 slab level. A finite element based software ETABS (vr.2016) is used for analyzing parameters like strip wise bending moments, shear force and displacements. A comparative analysis is carried out for maximum values of bending moments, shear force and displacements found in RCC and PT flat slab. The present work provides reasonable information regarding the suitability of Post-tensioned flat slab over RC flat slab.