Greece does allow dual citizenship. The Greek Nationality Code technically lets the state strip citizenship from someone who voluntarily takes a foreign one, but the Ministry of Interior has not used that power in decades, and millions of people worldwide hold a Greek passport alongside another.1Government Gazette of the Hellenic Republic. Law 3284 Ratification of the Greek Nationality Code The bigger issues for dual citizens are not permission but consequence: while you are on Greek soil, Greece treats you as Greek and nothing else, and that has practical effects on military service, tax filings, and what your other consulate can do for you.
What the Law Says and What Actually Happens
Article 16 of the Greek Nationality Code states that a person “shall lose” Greek nationality upon voluntarily acquiring a foreign one, but only with authorization from the Minister of Interior.1Government Gazette of the Hellenic Republic. Law 3284 Ratification of the Greek Nationality Code That authorization essentially never comes. The Ministry treats the provision as discretionary, and since the current code took effect, Greek authorities have not withdrawn citizenship from people who picked up a second passport. The Greek Constitution also limits revocation to narrow circumstances, and the government interprets those conservatively.
The practical trade-off is exclusivity within Greek borders. If you hold both a U.S. and a Greek passport, Greek law governs your obligations entirely while you are in Greece. Your other country’s consulate has limited ability to intervene on your behalf. That principle is the reason military service and tax residency questions matter so much: Greece is not looking at you as a foreigner who also happens to be Greek. You are Greek.
How You End Up With Greek Citizenship in the First Place
There are two routes, and which one applies to you shapes almost everything else.
By Descent
Greek citizenship follows bloodline, not birthplace. If either parent is a Greek citizen, you are legally Greek from birth, even if you were born abroad and have never been to Greece. The right passes down through generations. What you actually need to do is prove the chain and get yourself entered in the records of a Greek municipality, because a Greek citizen is legally defined as someone enrolled in those municipal records.2Ministry of Foreign Affairs. Greek Citizenship
For people whose ancestors emigrated generations ago, gathering the birth certificates, marriage certificates, and municipal records that connect each generation is usually the hardest part. The process typically starts at a Greek consulate abroad, with a consular fee around €140.3Hellenic Republic – Greece in the UK. Citizenship through Naturalisation for Aliens of Greek Ethnic Origin There is no residency requirement and no exam, because you are asking Greece to recognize a right you already hold, not to grant you a new status.
By Naturalization
Without Greek ancestry, you build up to citizenship through legal residency. Non-EU citizens generally need seven years of permanent legal residence. EU citizens, non-EU citizens married to a Greek with children, and non-EU citizens with a minor child who holds Greek citizenship qualify after three years.4Greek Government Portal. How Can I Become a Greek Citizen You also have to show economic stability, benchmarked loosely against the Greek minimum wage, which was €10,560 per year as of 2025.
All naturalization applicants sit the Knowledge Adequacy Certificate for Naturalisation, known by its Greek acronym PEGP. It covers Greek language at a B1 level plus general knowledge of Greek history, geography, culture, and political institutions.5Ministry of Interior. Greek Citizenship Test Resource Book The application fee is €700 for non-EU citizens and €100 for EU citizens, refugees, and stateless persons. The official processing timeline is one year; realistically most applications take two to four years.4Greek Government Portal. How Can I Become a Greek Citizen Once approved, you have one year from publication in the Government Gazette to take the oath, or the decision is automatically revoked.6EUDO-Citizenship Observatory. Greek Citizenship Code (as of 2010, English)
Military Service for Male Dual Citizens
This is the single biggest thing to understand before claiming a Greek passport. All male Greek citizens between 19 and 45 are required to serve in the armed forces, and holding another passport does not exempt you.7Hellenic Republic – Greece in the USA. National Service Information Service in another country’s military does not count. Standard service is 12 months, with a reduced nine-month option for those who volunteer for early induction or serve in high-priority zones like Thrace or the Eastern Aegean.
If you live permanently outside Greece, you can postpone conscription by obtaining a Certificate of Permanent Residence Abroad from a Greek consulate. To qualify, you need either 11 years of residence outside Greece or seven years of continuous full-time employment abroad.8Gov.gr. Get a Certificate of Permanent Non-Resident While using this postponement, you cannot spend more than six months in Greece in any calendar year, and years spent as a student abroad do not count toward the seven-year employment threshold. The obligation expires at 45.
Ignoring the obligation has real consequences. Men who fail to report are classified as “insubordinates” and face up to two years’ imprisonment in peacetime and a €6,000 fine for each period of insubordination. Insubordinates cannot obtain or renew a Greek passport, cannot leave Greece while they are in the country, cannot work as civil servants, and may lose professional licenses. These consequences stay in effect until you complete service, receive a legal exemption, or turn 45 and serve any outstanding sentence. For a dual citizen who plans to visit family, inherit property, or handle any business with Greek government offices, unresolved military status can freeze all of it.
Taxes When You Live Outside Greece
Greek citizenship alone does not make you a Greek tax resident. Greece taxes on residency, not citizenship, so a dual citizen living permanently in another country generally owes Greek taxes only on income from Greek sources such as rental property or Greek investments.9AADE. Useful Tax Guide for Greeks Abroad and Non-Residents
The catch is a filing requirement that catches people off guard. You need to submit a declaration to AADE, the Independent Authority for Public Revenue, through the myAADE digital portal confirming your tax residency is outside Greece.10AADE. FAQs for Greeks Abroad The deadline is the last working day of June following the tax year in question. Miss it and Greece treats you as a tax resident for that year and every year after, until you submit a new declaration. That flips you from owing tax on Greek-sourced income only to potentially owing Greek tax on worldwide income. From abroad, this deadline is easy to overlook, which is precisely why it matters.
If you do have Greek-sourced income, annual returns run through myAADE between March 15 and July 15 of the following year, and you will need a Greek Tax Identification Number (AFM) and TAXISnet credentials.9AADE. Useful Tax Guide for Greeks Abroad and Non-Residents If you eventually move to Greece, the picture changes: Greek residents owe tax on worldwide income, though special regimes exist for new arrivals, including a flat-tax option for high-net-worth individuals and favorable rates for foreign pensioners.
The Bottom Line for Dual Citizens
Greece will not take your Greek citizenship away for holding another passport, and the government has not done so in decades. What it will do is treat you as fully Greek the moment you touch Greek soil, with everything that implies. For men under 45, that means the conscription clock is running whether you know it or not, and the postponement paperwork is worth handling in advance rather than at a border. For anyone with income, it means filing that non-residency declaration with AADE each year, on time, so Greece does not quietly reclassify you as a resident taxpayer.