This study is focusing on the factors of home environment toward academic performance of secondary school student in Lahad Datu, Sabah. Researcher are focusing on three factors of home environment which are Famil Financial Situation, Impact of Family size and parental involvement. The purpose of this study is to asscess the influence of home environment (family financial situation, impact of family size and parental involvement) on academic performance of secondary school students in Lahad Datu. This study also identify the main factor of homr environment (family financial situation, impact of familysize anda parental involvement) that influence academic performance of secondary school students in Lahad datu.