The largest member which consumes concrete is the slab. The thickness of the slab increases as the load acting on it increases. As a result, more materials, such as concrete and steel, are consumed, and the slabs self-weight is increased. The weight of the structure is significant challenges in the active earth quick region and weak foundation soils. Voided slab construction has advantages such as reducingself-weight, Cost efficiencies and fast Construction. In this paper, a comparative finite element analysis of the flexural behavior of reinforced concrete solid slabs and biaxial voided square slabs subjected to 16 point loading conditions were performed by using ANSYS. The parametric study included in this work were void of shapes such as cuboidal, spherical, and triangular prisms; cost-benefits comparative analysis with a solid slab and analytically using yield line analysis were done. The simulation were run at three depth levels;the center of void placed at slab depth center, the center of void 10% (7.5mm) below slab depth center, and the center of void below 20% (15mm) slab depth center.From the analysis results, the volume of concrete was reduced by 17.69% compared to solid slab. As a result, employing a biaxial voided slab were minimize the amount of concrete used and steel reinforcement consumed by the building due to a reduction in self-weight by 17.69%and this helps to lower construction costs with a small reduction in the strength, performance, or lifespan of the structure. The load carrying capacity of triangular prism voids was 1.9 and 2.8% greater than that of spherical and cuboidal voids, respectively. When compared to a solid slab, a biaxial voided slab can endure 96% of the load-carrying capability and had more load-carrying capacity when the void is placed 10% (7.5mm) below the center of depth. Key words:ANSYS,biaxial voided slab; cuboid void; sphere void; triangular prism void: tensile membrane action; two-way flexure.