This study aims to determine the perceived impact of absenteeism on the academic performance of grade 12 students at Calamba Integrated School for the 2017-2018 school year. Specifically, it seeks to understand the demographic profile of students and assess the impact of absenteeism in terms of failing grades, low grades, and lack of learning. It also aims to identify potential action plans to reduce absenteeism, such as implementing an attendance policy, rewarding good attendance, and offering more school activities. The study is limited to 15 male and female students from two grade 12 sections and uses a questionnaire to collect data on absenteeism and its relationship to academic performance.