Although Cambodia now permits elective abortion, scarcity of research on this topic means that information on abortion incidence is limited to regional estimates. This estimation model combines national survey data from Demographic and Health Surveys (DHS) with national prospective data of abortion procedures from government health facilities, collected in 2005 and 2010, to calculate the national incidence of safe and unsafe abortion. According to DHS, the proportion of all induced abortions that took place in a health facility in the five years preceding each survey increased from almost 52% to 60%. Projecting from facility-based abortions to national estimates, the national abortion rate increased from 21 to 28 per 1000 women aged 15–44. The abortion ratio also increased from 19 to 28 per 100 live births. This research quantifies an increase in safely induced abortions in Cambodia and provides a deeper understanding of induced abortion trends in Cambodia.