Tait was South Australia's leading wicket taker, and the second leading wicket taker overall in the 2003–04 ING Cup with 18 wickets at an average of 19.61. The highlight of the season for Tait was undoubtedly his record-breaking haul of 8/43 against Tasmania on 9 January 2004. These were the best ever figures by an Australian in List A cricket, and the eighth best List A figures of all time. In the same season Tait played a One Day match for the Prime Minister's XI against the touring Indians in a team captained by Steve Waugh and was also a part of the Australia A team that took on Zimbabwe in January 2004. 2004–05 saw Tait lead the wicket-taking list in the ING Cup as he took 21 wickets at an average of 19.90, and in 2005–06 his 14 wickets at 13.28 assisted South Australia in reaching the final. Despite the Redbacks losing the final by 1 wicket, Tait provided an excellent performance after his team posted a relatively small target of 154, claiming 6/41 off 10 overs.