There has been recent discussion within effective altruism around global mental health as a new cause area. In the 2018 EA survey, it was included as a potential top cause area, and around 4% of EAs identified it as their top priority . This has led us to think about whether Charity Entrepreneurship (CE) should do prioritisation research on mental health as a potentially high-impact cause area. Many of us at CE have been convinced that this is a promising enough area to investigate as one of the four areas for our 2020 incubation program. In this post, I will explain which factors convinced us to expand our portfolio of cause areas for the next incubation round to include mental health.