After four seasons in the Conference North, Corby were relegated at the end of the 2012–13 season. They were Southern League Premier Division champions again in 2014–15 and were promoted back to the renamed National League North. However, another relegation in 2015–16 saw the club relegated to the Premier Division of the Northern Premier League. The club were transferred to Division One East of the Southern League at the end of the 2017–18 season as part of the restructuring of the non-League pyramid. The following season saw the club transferred to Division One Central of the Southern League.