Hill beat Robert Milkins 6–4 to qualify for the 2015 International Championship. On his debut at the main stage of a ranking event, he was defeated 6–2 by Jimmy Robertson. He played at the UK Championship and Welsh Open for the first time, losing 6–3 to Thepchaiya Un-Nooh in the former and 4–1 to Graeme Dott in the latter. Hill received a bye in the first round of the China Open, due to Mark Selby withdrawing, and won a second-round ranking event match for the first time by beating James Wattana 5–3, before losing by a reversal of this scoreline to Dominic Dale. At the end of the season, Hill was awarded the World Snooker Rookie of the Year award.