New Zealand citizens may travel to and work in Australia for any length of time without a pre-arranged visa.
Obtaining a visa
All visitors to Australia, apart from New Zealanders, require advance permission to enter the country. Holders of passports of all European Union countries as well as all Schengen Area countries and European microstates only need to apply online for an eVisitor authorisation. Citizens of some OECD and some East Asian countries are able to apply for the similar Electronic Travel Authority authorisation.
There are three types of visas you may apply for:
eVisitor (subclass 651) for citizens of the 31 EEA countries as well as citizens of Andorra, Monaco, San Marino, Switzerland and Vatican City. These visas are free, but otherwise effectively identical to the ETA. You must apply on-line.
Electronic Travel Authority (ETA) subclass 601, is available on-line to nationals of Brunei, Canada, Hong Kong SAR, Japan, Malaysia, Singapore, South Korea (ROK) and United States. The citizens of some eVisitor eligible countries and citizens of Taiwan may also apply for the ETA but solely through a travel agent, airline, specialist service provider or an Australian visa office outside Australia. A service fee of $20 applies.
Online Visitor visa (subclass e600). Holders of passports of all the ETA and eVisitor eligible countries and also the following 27 eligible countries Algeria, Argentina, Bahrain, Belarus, Brazil, Chile, Egypt, Macedonia, Kazakhstan, Kuwait, Libya, Maldives, Micronesia, Moldova, Montenegro, Morocco, Nauru, Oman, Papua New Guinea, Qatar, Saudi Arabia, Serbia, Sudan, Tunisia, Turkey, UAE and Ukraine can make visa applications online. Visitor visa (subclass 600). Other nationalities must apply using the paper form, and may need to visit an embassy or visa processing centre.
Transit visa (subclass 771)
If you are transiting through Australia, remain airside for a maximum of 8 hours, have a confirmed onward booking, have the correct entry documentation for the onward destination, these citizens do not need to apply for any advance visa: New Zealand, the European Union, Andorra, Argentina, Brunei, Canada, Cyprus, the Federated States of Micronesia, Fiji, Iceland, Indonesia, Japan, Kiribati, Liechtenstein, Malaysia, Mexico, Monaco, Nauru, Norway, Palau, Papua New Guinea, Philippines, South Africa, the Republic of Marshall Islands, Samoa, San Marino, Singapore, Slovakia, Slovenia, Solomon Islands, South Korea (ROK), Switzerland, Taiwan, Thailand, Tonga, Tuvalu, United Arab Emirates, United Kingdom (regardless of nationality status), the United States, the Vanuatu or Vatican City.
All other passengers who transit through Australia must apply for a free-of-charge Transit Visa (subclass 771) prior to travel.
Official website: http://www.immi.gov.au/Pages/Welcome.aspx