Tax: A year away does not by itself end Australian residence
Under the tax law, someone domiciled in Australia stays resident unless the Commissioner is satisfied their permanent place of abode is outside Australia, and someone in Australia for more than half the year is resident unless their usual place of abode is overseas and they do not intend to live here. The ATO says that if you are resident you declare income from Australia and overseas on your Australian return, even if you have paid tax on it overseas, with a possible foreign income tax offset; if you go overseas temporarily and keep your Australian residence, you must still lodge a return.
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If you stop being resident, assets other than taxable Australian property, such as many shares, are treated as sold at market value unless you choose to disregard this. With no treaty in force between Australia and Cambodia, there is no treaty tie-breaker for dual residence and no treaty rule limiting which country taxes your pay; Cambodia gives residents a credit for foreign tax with documents, and Australia a possible offset for Cambodian tax paid, so ask an adviser how the two fit your case.
Sources: Federal Register of Legislation (Australian Government), Australian Taxation Office, Australian Treasury, Royal Government of Cambodia. Checked 16 October 2026.