Every business must increase its sales by making regular promotions every year. To enable them to survive, they will measure their ability to gather market size and market share on their business lines. The main purpose of this research is to measure the effectiveness of promotion expenses on gathering market size and market share of Universitas Advent Indonesia from all feeders (Senior High Schools) of Seventh-day Adventist Schools in West Indonesia. This study uses an 8 (eight) years sample, starting from school years 2011/2012 – 2018/2019. Using component analysis method. The component is analyzed based on yearly promotion expenses and the result of market size and market share. The result shows that every year the effectiveness of promotion expenses on gathering market size is very effective i.e for school year 2011/2012 = 383.17%; 2012/2013 = 798.31%; 2013/2014 = 651.75%; 2014/2015 = 656.48%; 2015/2016 = 685.92%; 2016/2017 = 444.55; 2017/2018 = 655.95%; 2018/2019 = 543.54%. The average for eight years = 579.14% (very effective). While the effectiveness of promotion expenses on gathering market share is also very effective i.e for school year 2011/2012 = 102.82%; 2012/2013 = 198.65%; 2013/2014 = 168.83%; 2014/2015 = 149.62%; 2015/2016 = 176.42%; 2016/2017 = 122.53%; 2017/2018 = 173.97%; 2018/2019 = 138.35%. The average for eight years = 149.21% (very effective).