He received his first start for Ghana in the World Cup qualifier against Benin on 28 March, which Ghana won 1–0. Inkoom used to be a member of the Black Starlets. He was in the extended squad for the 2005 FIFA U-17 World Championship in Peru. He was part of Ghana's 2015 Africa Cup of Nations campaign, helping them reach the final, where they lost in a penalty shootout against the Ivory Coast.