There are several paths to citizenship, accommodating different backgrounds and circumstances.

Permanent residents or New Zealanders (under 60)

Individuals must reside in Australia at the time of the application, have spent time in the country, and intend to stay in Australia or maintain a permanent connection to the country.

A child under 15 years may be included with this application at no additional cost.

Permanent residents or New Zealanders (over 60)

This is a similar citizenship path to the under 60 option, but less expensive. It does not require the citizenship test.

Parent was a Citizen

A child born overseas to an Australian citizen may apply for citizenship.
Children under 15 will need parental approval.

Individuals over 18 must be of good character.

Parent was a former Australian citizen

A child of a former Australian citizen may apply for citizenship if they can provide evidence of their parent’s former citizenship.

Child under 15 years

A child under 15 years can apply for citizenship even if the parent is not a citizen or does not intent to become a citizen. There may need to show reason for application. i.e.: the child will be disadvantaged by not being a citizen.
If the parent does become a citizen then the child may be included in the parent application.

Papua Citizen

A person born in Papua before the 1975 independence (16 Sep 1975) with an Australian parent may apply for Australian citizenship if they can support the claim.

Former Australian Citizens

A former Australian citizen may apply to resume citizenship, depending on the reason why they ceased to be a citizen.
A former citizen may also apply for general citizenship by conferral.

Immigration lawyers Sydney

Use a registered immigration lawyer to make sure you have the best legal chance of immigration to Australia or acquiring citizenship.