Australian citizenship by descent can allow a child born overseas to become an Australian citizen.
The key question is usually whether an Australian citizen was the child’s parent at the time of birth.
A child born overseas does not automatically become Australian simply because a parent is Australian.
An application for Australian citizenship by descent generally needs to be made and approved.
This Millennium Migration guide explains the main Australian citizenship by descent rules applying in October 2026.
Sam Lotfollahi · MARN 0901704 ↗
Founder, Millennium Migration · Australian Registered Migration Agent · 8 min read · ★ Google reviews
Published 17 October 2026 · Updated 17 October 2026 · Sources checked 17 October 2026
Principal at Millennium Migration · Melbourne and Adelaide · Seventeen years of migration practice.
The short version
- The child was born outside Australia.
- At least one parent was an Australian citizen when the child was born.
- The parent-child relationship can be established with acceptable evidence.
- If the Australian parent was also a citizen by descent, an extra residence rule may apply.
- An applicant aged 18 or over must satisfy the good character requirement.
Who qualifies for Australian citizenship by descent?
A person born outside Australia on or after 26 January 1949 may qualify if a parent was Australian at birth.
This guide focuses on births from that date. Separate historical rules apply to people born earlier; those cases need individual assessment.
The parent’s citizenship must already have existed when the child was born.
If the parent became an Australian citizen only after the child’s birth, that normally does not satisfy this rule.
The applicant does not need to be a child when applying; adults can also apply for Australian citizenship by descent.
Important: citizenship by descent is about citizenship status at the date of birth.
A parent’s later citizenship grant does not retrospectively make the child a citizen by descent.
Australian citizenship by descent: the parent’s two-year rule
This is one of the most important rules for families with Australian citizenship across several generations.
If the parent was themselves an Australian citizen by descent, the parent normally needs Australian residence.
The current requirement is at least two years of lawful presence in Australia before the child applies.
The two years can be accumulated over different periods. They need not be immediately before the application or all before the child’s birth.
A similar rule can apply where the parent acquired citizenship through certain overseas adoption arrangements.
There is a narrow alternative to this parent-presence test under section 16(2)(b) of the Australian Citizenship Act 2007. It concerns an applicant who is not, and has never been, a citizen or national of any country. Not holding a passport is not enough; get individual advice about statelessness and the full eligibility rules.
This is not a 10-year residence requirement.
For Australian citizenship by descent, the relevant parent rule is generally two years of lawful presence.
Australian citizenship by descent: evidence to prepare
| Requirement | Typical evidence |
|---|---|
| Child’s identity | Birth certificate, passport and other official identity documents |
| Parent-child relationship | Full birth certificate and other evidence of legal parentage where required |
| Parent’s Australian citizenship | Australian citizenship certificate, passport or other citizenship evidence |
| Parent’s citizenship at birth | Evidence showing the parent was already Australian when the child was born |
| Two-year residence rule | Travel records and evidence of lawful presence in Australia |
| Identity changes | Marriage certificate, name-change certificate or other official records |
| Character, if aged 18+ | Police or penal certificates where required |
Documents not in English generally need an acceptable English translation.
The Department of Home Affairs may request additional evidence if identity, citizenship or parentage is unclear.
Australian citizenship by descent: must the child live here?
Ordinary Australian citizenship by descent does not require the child to have lived in Australia first.
The important residence rule applies to the Australian parent where that parent was also a citizen by descent or acquired citizenship through certain overseas adoption arrangements.
This is different from citizenship by conferral, which has its own Australian residence requirements.
What if the child was born in Australia?
A child born in Australia is generally not applying for citizenship by descent.
If a parent was an Australian citizen or permanent resident at birth, the child is generally a citizen by birth.
There is also a separate rule for certain children who were ordinarily resident in Australia for their first 10 years.
They can acquire citizenship on their 10th birthday even if neither parent was a citizen or permanent resident. The ordinary-residence test must be met throughout those first ten years; simply reaching age ten is not enough.
Different rule: the 10-year provision relates to certain children born in Australia.
It should not be confused with the two-year parent rule for citizenship by descent.
What if the child was born through international surrogacy?
A child born overseas through surrogacy may potentially apply for Australian citizenship by descent.
However, Home Affairs must be satisfied that the requirements for citizenship and parentage are met.
Surrogacy laws differ between countries and Australian states and territories.
Seek independent legal advice before committing to an international surrogacy arrangement, including advice on parentage and bringing the child to Australia.
Australian citizenship by descent or overseas adoption?
Australian citizenship by descent and citizenship by adoption are separate pathways.
Some overseas adoptions under the Hague Convention or bilateral arrangements have a specific citizenship route.
Do not assume that an overseas adoption automatically satisfies ordinary citizenship-by-descent requirements.
Do applicants over 18 need to satisfy character requirements?
Yes. Applicants aged 18 or over must generally be of good character.
Home Affairs can consider criminal convictions, court obligations and honesty in immigration dealings.
Police certificates may be requested for countries where the applicant has lived or spent relevant periods.
Does a citizenship-by-descent application give a bridging visa?
No.
Home Affairs specifically states that it cannot grant a bridging visa for a citizenship-by-descent application.
If the applicant needs to remain in or travel to Australia, their separate visa status must be considered.
Common Australian citizenship by descent mistakes
- Assuming a child born overseas is automatically Australian.
- Checking the parent’s citizenship today instead of at the child’s date of birth.
- Missing the two-year rule where the Australian parent is also a citizen by descent.
- Confusing citizenship by birth with citizenship by descent.
- Assuming a passport alone will resolve every citizenship or parentage issue.
- Ignoring character requirements where the applicant is now aged 18 or over.
- Treating surrogacy or overseas adoption cases as ordinary birth cases.
Frequently asked questions about Australian citizenship by descent
Parent citizenship and eligibility
Is my child automatically Australian if I am an Australian citizen?
Not necessarily. A child born overseas generally needs to apply for Australian citizenship by descent.
Do I need to have been Australian when my child was born?
Yes. The parent relied on for descent generally must have been an Australian citizen at the time of birth.
What if I became an Australian citizen after my child was born?
That normally does not create Australian citizenship by descent eligibility based on your later citizenship. Check whether the other parent was Australian at birth or whether another pathway is available.
Residence and adult applicants
What if I am Australian by descent myself?
You generally need at least two years of lawful presence in Australia before your child’s application. Separate periods can count towards that total; the narrow statelessness alternative needs individual assessment.
Does my child need to live in Australia first?
Usually no. Citizenship by descent does not normally require the child to have lived in Australia.
Can an adult apply for Australian citizenship by descent?
Yes. There is no requirement that the applicant still be a child, although applicants 18+ face character requirements.
Complex cases and travel
Can a child born through surrogacy qualify?
Potentially, but citizenship and legal parentage need careful assessment based on the individual arrangement. Seek independent legal advice before committing to international surrogacy.
Does citizenship by descent give me a bridging visa while I wait?
No. Home Affairs states that a bridging visa cannot be granted for this citizenship application.
Need help with Australian citizenship by descent?
Australian citizenship by descent can be straightforward, but parent citizenship, descent and parentage issues can complicate it.
Millennium Migration can review the family history and identify the correct citizenship or visa pathway.
Explore our Australian citizenship services to discuss your family’s evidence and next steps.
Free visa assessment Book a consultationRelated reading
- Australian Visa Options
- Australian Migration Changes 2026
- Free Australian Visa Assessment
- Contact Millennium Migration
Sources
- Department of Home Affairs — Become an Australian citizen by descent . Verified 17 October 2026.
- Federal Register of Legislation — Australian Citizenship Act 2007 . Verified 17 October 2026.
- Department of Home Affairs — Citizenship character requirements . Verified 17 October 2026.
- Department of Home Affairs — Evidence of Australian citizenship . Verified 17 October 2026.
- Department of Home Affairs — International surrogacy arrangements . Verified 17 October 2026.
- Department of Home Affairs — Citizenship for children adopted outside Australia . Verified 17 October 2026.
General information only, not citizenship or legal advice. Eligibility depends on individual family circumstances.
Sources checked on 17 October 2026. Recheck the current requirements before applying.
Sam Lotfollahi, Registered Migration Agent, MARN 0901704, leads Millennium Migration.