Last updated: 1 April 2026

Australia allows dual citizenship, meaning you can become an Australian citizen while keeping your existing nationality, provided your home country also permits it. Countries like India, China, and Singapore do not allow dual citizenship, requiring you to renounce before becoming an Australian citizen.

Dual Citizenship Australia: Rules and Eligibility

Australia permits dual and multiple citizenship. When you become an Australian citizen, there is no requirement under Australian law to give up your original nationality. This makes Australia one of the more flexible countries in the world on this question.

However, the other side of the equation — what your country of origin allows — is entirely separate. Some countries prohibit dual nationality and will automatically cancel your original citizenship when you naturalise in Australia. This guide covers how dual citizenship works in practice, country-by-country considerations, obligations, travel rules, and common questions.

Australia’s Position on Dual Citizenship

Australia has allowed dual citizenship since 4 April 2002, when the Australian Citizenship Act 1948 was amended (later replaced by the Australian Citizenship Act 2007). Before this date, Australians who took up foreign citizenship automatically lost their Australian citizenship, and foreigners who became Australian citizens were required to renounce their original nationality.

The 2002 change removed both requirements. Since then:

• You can become an Australian citizen without renouncing your existing nationality
• Australians who naturalised in another country before 2002 and lost their Australian citizenship may be eligible to reclaim it through an application for resumption of citizenship

There is no cap on the number of citizenships you can hold under Australian law. If your other countries of citizenship also permit multiple citizenship, you can theoretically hold three, four, or more citizenships simultaneously.

Your Home Country’s Rules

Australian law does not affect what your home country decides to do about your citizenship. When you become an Australian citizen, your home country’s laws determine whether you keep, lose, or must renounce your original nationality.

Countries that generally prohibit dual citizenship with Australia include:

• India — Indian law does not permit Indian nationals to hold citizenship of another country. When you become an Australian citizen, you automatically cease to be an Indian citizen under the Citizenship Act 1955. You must subsequently obtain an Overseas Citizen of India (OCI) card if you wish to maintain a connection to India, though OCI is not the same as citizenship.

• China — The Nationality Law of the People’s Republic of China does not recognise dual nationality. Chinese nationals who voluntarily acquire foreign citizenship automatically lose their Chinese nationality.

• Japan — Japan permits dual citizenship only during childhood. Japanese nationals who naturalise abroad are required to select one nationality by the age of 22 (or within 2 years of acquiring the second nationality, if later). Japan has historically been lenient in enforcement, but formally does not recognise dual nationality in adults.

• Singapore — Singapore does not permit dual citizenship. Singapore citizens who become citizens of another country automatically lose their Singapore citizenship.

• Indonesia — Indonesia generally does not recognise dual citizenship for adults, though recent legislative proposals have discussed limited exceptions.

Countries that generally permit dual citizenship with Australia include:

• United Kingdom — The UK permits dual nationality. British citizens who become Australian citizens retain their British citizenship.

• Ireland — Ireland permits dual citizenship. Irish nationals can become Australian citizens without affecting their Irish status.

• New Zealand — New Zealand permits dual citizenship.

• Italy — Italy permits dual citizenship. Italian nationals can become Australian citizens and retain Italian citizenship.

• Philippines — The Philippines recognises dual citizenship for former Filipino citizens who naturalised abroad, under the Republic Act No. 9225 (Dual Citizenship Act of 2003). Filipino nationals who become Australian citizens may be able to reacquire or retain Philippine citizenship under this Act.

• United States — The United States does not formally prohibit dual citizenship, though naturalising US citizens must take an oath to renounce prior allegiances. In practice, US authorities do not typically enforce dual nationality loss for citizens of countries like Australia.

This list is not exhaustive. Laws change, and individual circumstances (how citizenship was acquired, military service implications, etc.) can affect outcomes. Always confirm the current rules with your home country’s embassy or consulate before proceeding with Australian naturalisation.

How to Become an Australian Dual Citizen

If you are a foreign national seeking Australian citizenship while retaining your original nationality, the process is the same as for any citizenship by conferral:

1. Hold permanent residency for at least 12 months
2. Meet the 4-year total lawful residency requirement (with limited absences)
3. Pass the citizenship test
4. Attend a citizenship ceremony and make the pledge

Australia will confer citizenship without requiring any documentation of renouncing your original nationality. The Department of Home Affairs does not ask you to prove you have given up your other citizenship.

If you are an Australian citizen seeking to naturalise in another country, check that country’s rules. Some countries require you to renounce your Australian citizenship as part of their naturalisation process. Where this is the case, you will need to formally renounce your Australian citizenship with the Department of Home Affairs if you wish to comply with that country’s requirements.

Rights and Obligations of Dual Citizens

Dual citizens in Australia have the same rights and obligations as other Australian citizens:

Voting: Australian citizens aged 18 and over are required to enrol and vote at federal, state, and territory elections. This obligation applies regardless of any other citizenship you hold.

Jury duty: Australian citizens can be called for jury service. Dual citizens are not exempt.

Taxes: Your Australian tax obligations are determined by your tax residency status, not your citizenship. If you are an Australian tax resident, you pay tax on your worldwide income in Australia, regardless of any other citizenship. If your other country of citizenship also taxes worldwide income, you may need to consider double taxation agreements.

Military service: Some countries with compulsory military service may require their citizens — including those who also hold Australian citizenship — to fulfil service obligations when present in that country. This is a matter of the other country’s law, not Australia’s.

Travel Rules for Dual Citizens

Australian law requires Australian citizens to enter and depart Australia using their Australian passport. This applies even if you hold another valid passport. Australian Border Force may refuse boarding if a travel agent or airline checks your passport and finds you are an Australian citizen travelling on a foreign document.

When travelling to your other country of citizenship, you use that country’s passport for that border crossing. This is generally accepted practice. Carry both passports when travelling internationally, and use each passport at the relevant border.

Consular protection: Australia cannot provide consular assistance to a dual citizen while they are in the country of their other citizenship. For example, if you hold Australian and Italian citizenship and you are in Italy, the Australian Embassy in Rome cannot assist you in most situations — because Italy considers you an Italian citizen.

Former Australian Citizens: Resumption

Australians who were forced to give up their Australian citizenship before April 2002 (because they took up foreign citizenship at a time when dual citizenship was not permitted) may be eligible to have their Australian citizenship reinstated through a resumption of citizenship application. This is different from applying for citizenship by conferral. If you lost Australian citizenship before 2002 and want to explore resumption, contact the Department of Home Affairs.

Country-by-Country Dual Citizenship Rules

The following table covers the top 10 source countries for people becoming Australian citizens, and whether those countries permit their nationals to hold dual citizenship with Australia:

Important disclaimer: Nationality laws change. This table reflects general positions as of early 2026. Always confirm the current rules with the relevant embassy or consulate before making irreversible decisions about your citizenship.

What Happens to Your Original Citizenship When You Become Australian

The practical consequences of acquiring Australian citizenship vary significantly depending on your home country’s laws. Here is what typically happens in the most common scenarios:

Automatic loss countries (India, China, Nepal). In these countries, your original citizenship ceases the moment you acquire Australian citizenship — by operation of law, not by any action you take. You do not need to formally renounce; it happens automatically. This means you can no longer enter your home country on your original passport. You will need to apply for a visa or a special status card (such as India’s OCI) to visit.

Retention with registration countries (Sri Lanka, Philippines). These countries allow you to keep your original citizenship, but you may need to take a formal step — such as filing a petition or registering for dual citizenship — to ensure your home country recognises your continued nationality. If you do not complete this step, your home country may treat you as having lost citizenship even though their law technically permits retention.

Full retention countries (UK, New Zealand, Ireland, Pakistan with Australia). No action is required. Your home country recognises your continued citizenship regardless of your acquisition of Australian nationality. You can hold and use both passports.

Impact on property and inheritance. In some countries — particularly India and China — losing citizenship can affect your ability to own property, inherit assets, or conduct business. India’s OCI card restores some of these rights but not all (for example, OCI holders cannot own agricultural land in India). Plan for these consequences before applying for Australian citizenship.

Impact on pension and social security. If you have accumulated pension entitlements or social security credits in your home country, check whether losing citizenship affects your access to those benefits. In many cases, bilateral social security agreements between Australia and your home country protect your entitlements regardless of citizenship changes.

Tax Implications of Dual Citizenship

Dual citizenship can create tax complexity, particularly if both countries assert taxing rights over your income. This section provides a factual overview — consult a qualified tax professional for advice specific to your situation.

Australia’s approach: Australia taxes based on tax residency, not citizenship. If you are an Australian tax resident (which most people living in Australia are), you pay tax on your worldwide income. Your other citizenship is irrelevant to the Australian Tax Office (ATO) for the purposes of determining your tax obligations.

The US exception: The United States is one of very few countries that taxes its citizens on worldwide income regardless of where they live. If you hold both Australian and US citizenship, you have tax filing obligations in both countries. The Australia-US tax treaty and the Foreign Earned Income Exclusion (FEIE) help reduce double taxation, but compliance is complex and professional advice is essential.

Double taxation agreements (DTAs): Australia has DTAs with over 40 countries, including the UK, India, China, New Zealand, Canada, Germany, Japan, and South Korea. These agreements typically allocate taxing rights and provide mechanisms (such as foreign income tax offsets) to prevent the same income being taxed in both countries.

Key areas of concern for dual citizens:

Practical recommendation: If you hold citizenship of two or more countries, engage a tax professional who specialises in international tax before making major financial decisions (selling property overseas, transferring superannuation, receiving an inheritance).

Travelling on Two Passports

Dual citizens routinely travel with two passports. This is entirely legal and expected — it is not a grey area. Here is how to manage it practically:

The Australian law requirement: Australian citizens must enter and depart Australia using their Australian passport. This is a legal obligation under the Australian Passports Act 2005. Airlines and border officials check this at departure and arrival. If you attempt to enter Australia on your foreign passport as an Australian citizen, you may be refused boarding or experience delays at the border.

Using your other passport: When travelling to the country of your other citizenship, use that country’s passport for entry and exit. Most countries expect or require their citizens to enter on that country’s passport.

Practical travel workflow:

1. Departing Australia: Check in at the airline counter with your Australian passport. At immigration/border control, present your Australian passport.
2. Arriving in your other country: Present your other country’s passport at immigration.
3. Departing your other country: Present your other country’s passport at immigration.
4. Arriving back in Australia: Present your Australian passport at immigration.

Travelling to a third country: Use whichever passport gives you the most favourable entry conditions (visa-free access, longer stay, etc.). You are not obligated to use your Australian passport for third-country travel, though many Australians do because the Australian passport provides visa-free access to over 185 countries.

Airline check-in considerations: Airlines need to verify you have the right to enter your destination country before allowing you to board. If you are flying to a country where your Australian passport requires a visa but your other passport does not, show the airline your other passport at check-in. Carry both passports at all times during international travel.

Transit countries: If you are transiting through a third country (for example, flying from Australia to India via Singapore), use your Australian passport for departure from Australia, your Australian or other passport for transit (depending on which provides visa-free transit), and your other passport for arrival at your final destination.

Frequently Asked Questions

Can children born in Australia to foreign nationals hold dual citizenship? Children born in Australia are not automatically Australian citizens unless at least one parent is an Australian citizen or permanent resident. Children of permanent residents who are born in Australia may acquire citizenship at birth or may need to apply. Check the citizenship by birth rules carefully — they depend on the parents’ visa status at the time of birth.

Does getting dual citizenship affect government security clearances? Yes. Holding citizenship of another country can affect eligibility for Australian security clearances, particularly at higher classification levels. The Australian Government Security Vetting Agency (AGSVA) assesses foreign citizenship as part of the vetting process. Dual citizens are not automatically excluded, but their other citizenship is a factor in the assessment.

Can you give up Australian citizenship voluntarily? Yes. Australian citizens can apply to renounce their Australian citizenship in certain circumstances — for example, if another country requires renunciation as a condition of naturalisation. The renunciation process is handled through the Department of Home Affairs and involves completing the appropriate application form and paying the applicable fee.

Do I need to tell Australia if I acquire another citizenship? No. There is no legal requirement under Australian law to notify the Department of Home Affairs if you acquire citizenship of another country. Australia permits dual and multiple citizenship, so acquiring another nationality does not affect your Australian citizenship status.

Can dual citizens work in Australian government jobs? Yes, for most positions. Dual citizens can work in the vast majority of government roles. However, some positions — particularly in defence, intelligence, and national security — require sole Australian citizenship or may require you to renounce your other citizenship before a security clearance is granted. Each role’s requirements are listed in the job advertisement.

Does dual citizenship affect my Australian tax obligations? Your tax obligations in Australia are based on your tax residency status, not your citizenship. If you are an Australian tax resident, you pay tax on your worldwide income regardless of whether you hold one citizenship or five. However, holding citizenship of another country may trigger tax obligations in that country as well — the United States, for example, taxes its citizens on worldwide income regardless of where they live.

Can I pass dual citizenship to my children? This depends on the laws of both countries. Australian citizenship can be passed to children born overseas if at least one parent is an Australian citizen (citizenship by descent). Whether your other country also grants citizenship to your child depends on that country’s nationality laws. Some countries grant citizenship by parentage (jus sanguinis) regardless of where the child is born; others do not.

Next Steps

• Australian citizenship overview and requirements
• Step-by-step citizenship application guide
• PR to citizenship: timeline and requirements
• PR vs citizenship: key differences
• Australian permanent residency overview