In Australia, the following top-level domains are widely used. If you intend to target an Australian audience choose from the following names. Our prices are significantly lower than other industry heavy-weights.

com.au is the ideal namespace for Australian commercial entities. It is reserved for Australian entities with a valid ABN, ACN, Registered Business Number or Incorporated Association Number. If your business name is available in the .com.au space, then we recommend registering it as soon as possible. Please note that there is an eligibility criteria for .com.au names.
Registration only $66 for 2 years.

net.au is a great secondary namespace to .com.au, it has the same eligibility criteria as .com.au, and has generally been associated with the IT related sites in the past. If your .com.au is unavailable, then this is a good alternative. If you've already registered your .com.au, you may wish to secure your .net.au for future use.
Registration only $66 for 2 years.

org.au is the domain space reserved for Australian "Not for Profit" incorporated entities. Great news if you're a registered charity, or not for profit group! It also happens to be the cheapest namespace on the market.
Registration only $22 for 2 years.

id.au is the perfect namespace for individuals or families.
Registration only $44 for 2 years.
* All prices are inclusive of GST.