In Ireland, the song reached number one on the week before Christmas but lost the top position to a cover of Will Young's song "Leave Right Now" by Irish comedian Mario Rosenstock on Christmas week. It then returned to the top spot for another week, its last at number one. At the end of 2005, the Irish Recorded Music Association ranked it as Ireland's eight-most-successful song. "JCB" stayed on the Irish Singles Chart for 16 more weeks. On the Eurochart Hot 100, the song debuted at its peak of number six on 21 December 2005 and stayed in the top 15 for a further four issues. In Australia, iTunes made a digital download of the song available on 17 June 2006, and the enhanced CD of "JCB" was re-released two days later, on 19 June. On 2 July 2006, the song debuted on the Australian ARIA Singles Chart at number 45 and peaked at number 43 the next week. It then dropped out of the top 50. In an interview with "Impact Magazine", Parker stated that is not bothered by the fact that Nizlopi are a one-hit wonder, with him saying, "It means a lot to a lot of people, a lot of people had it played at their funerals and it makes a lot of people think about their family life. It's an important song [...] We've always been proud of it."