Following the 2013 FIFA U-20 World Cup, in July 2013 Pain received his first call up for Australia for the 2013 EAFF East Asian Cup in South Korea. He and Melbourne Victory teammate Nathan Coe left the squad midway through the tournament for a club friendly against Liverpool. Nonetheless, Pain returned for the final game of the tournament against China and made his debut as a second-half substitute in a 4–3 loss.