As at June 2013 there were an estimated 640,770 New Zealand citizens present in Australia.
Under various arrangements since the 1920s, there has been a free flow of people between Australia and New Zealand. Historically, migration flows across the Tasman have been large in both directions, but since the 1960s more New Zealanders than Australian have chosen to cross the Tasman to live. In 2011–12, the number of New Zealand permanent settlers who came to Australia was 44,304. This represents a 28 per cent increase from the figure for 2010‑11. As at June 2013 there were an estimated 640,770 New Zealand citizens present in Australia.
Under the Trans-Tasman Travel Arrangement introduced in 1973, Australian and New Zealand citizens are able to enter each other’s country to visit, live and work indefinitely, without the need to apply for prior authority. New Zealand is the only country in the world that has such an arrangement with Australia. There are no caps on the numbers of New Zealanders who may enter under the arrangement, and the only limitations on entry relate to health and character requirements.