The 2014 outbreak of the Ebola virus disease in West Africa has taken a devastating human toll. Although the outbreak originated in rural Guinea, it has hit hardest in Liberia and Sierra Leone, in part because it has reached urban areas in these two countries, a factor that distinguishes this outbreak from previous episodes elsewhere. As of October 3, 2014, there had been 3,431 recorded deaths out of 7,470 probable, suspected, or confirmed cases of Ebola. This report informs the response to the epidemic by presenting best-effort estimates of its macroeconomic and fiscal effects. Any such exercise is necessarily highly imprecise due to limited data and many uncertain factors, but it is still necessary in order to plan the economic assistance that must accompany the immediate humanitarian response. The goal is to help affected countries to recover and return to the robust economic growth they had experienced until the onset of this crisis. This document presents the World Bank's preliminary estimates of the economic impact of the Ebola outbreak in West Africa for 2014 (short term impact) and 2015 (medium term impact).