This paper presents a study on the simulation of a tandem solar cell using SCAPS 1D software. The tandem solar cell consists of a bottom cell made of crystalline silicon and a top cell consisting of a perovskite solar cell based on MASnBr3. The aim of this study is to evaluate the performance potential of this tandem cell configuration. Simulation results reveal that the tandem cell can achieve a power conversion efficiency of 42.7%, which is higher than that of individual cells. The impact of materials in the hole transport layers (HTLs) and electron transport layers (ETLs) of perovskite solar cells on their PCE are discussed in detail. According to our findings, CuSbS2 and AZO are the best-suited materials for HTL and ETL, respectively. The research also explores the impact of various parameters, including the thickness, bandgap, defect density of the perovskite layer, effect of thickness of ETL and HTL on the performance of the tandem solar cell. The standalone top cell gives an Efficiency (eta) of 30.88% (FF=84.87%, Jsc= 32.02 mA/cm2, Voc=1.13 v). The standalone bottom cell gives an Efficiency (eta) of 21.80% (FF=85.24%, Jsc=20.30 mA/cm2, Voc=0.74 v). A TSC with MASnBr3 on c-Si shows an Efficiency of 42.70% (FF=85.24% , Jsc=15.48 mA/cm2, Voc=1.87 v). Overall, this study underscores the potential of tandem solar cells for efficient photovoltaic energy conversion.