This document summarizes a study that analyzed factors influencing the use of e-money in Indonesia. The study examined how perceived usefulness, perceived ease of use, subjective norm, technological innovativeness, and perceived credibility impact e-money usage. A literature review covered relevant theories and prior studies. Hypotheses were developed that perceived usefulness, ease of use, technological innovativeness, and credibility would positively influence e-money use, while subjective norm would negatively influence it. Data was collected through surveys in Semarang, Indonesia and analyzed using regression. The study found perceived credibility significantly impacts e-money use but the other factors do not.