The 2013 ITM Cup season was the eighth season of New Zealand's provincial rugby union competition since it turned professional in 2006. The regular season began on 15 August, when Counties Manukau hosted Wellington. It involved the top fourteen rugby unions of New Zealand. For sponsorship reasons, the competition was known as the ITM Cup and it was the fourth season under the lead sponsor. The winner of the Championship, Tasman was promoted to the Premiership, the seventh placed Premiership team, Bay of Plenty was relegated to the Championship.