Birthright citizenship rules vary sharply by country. Roughly 30 nations grant citizenship automatically to anyone born on their territory, a principle known as jus soli or “right of the soil.” Most of the rest of the world uses jus sanguinis (“right of blood”), which passes citizenship through parents rather than place of birth. A middle group grants territorial citizenship only when a parent meets residency or legal-status conditions. Where your child is born, and to whom, determines which rules apply.
Countries That Grant Citizenship Automatically at Birth
Unconditional jus soli is concentrated in the Americas. In these countries, a child born on the territory is a citizen at birth regardless of the parents’ nationality or immigration status.
United States. The Fourteenth Amendment provides that “all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States.”1Congress.gov. Fourteenth Amendment Parents can be citizens, permanent residents, tourists, or undocumented; the child is a citizen. A January 2025 executive order sought to exclude children whose parents lacked permanent status, but federal courts in multiple states issued preliminary injunctions blocking it, and it remains unenforceable.
Canada. Under the Citizenship Act, any person born in Canada after February 14, 1977, is a citizen regardless of the parents’ nationality or immigration status.2Government of Canada. Citizenship Act – Section 3 A December 2025 amendment (Bill C-3) changed how Canada handles citizenship by descent for children born abroad but left the jus soli rule for births on Canadian soil untouched.3Parliament of Canada. An Act to Amend the Citizenship Act (2025) – Royal Assent
Mexico. Article 30 of the Constitution treats as Mexican by birth anyone born on Mexican territory regardless of parental nationality, plus those born aboard Mexican military or merchant vessels or aircraft.4Constitute Project. Mexico 1917 (Rev. 2015) Constitution
Brazil. The Constitution makes anyone born in Brazilian territory Brazilian by birth. The only exception is when foreign parents are in Brazil “in the service of their country.”5Constitute. Brazil 1988 Constitution
Argentina. Argentine nationality is unusually durable. Argentine law provides that any renunciation of citizenship operates only as a suspension of political rights, not as true loss of nationality.6Consulate General and Promotion Center in Milan. Choice of Argentine Citizenship Even if you naturalize elsewhere and never return, Argentina still considers you Argentine.
Other countries in the region with unconditional or near-unconditional jus soli include Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay, and most Caribbean island nations.
Countries That Require a Parent to Meet Conditions
A second group grants citizenship at birth on the territory only when the parents satisfy residency or status tests. These systems are common in Europe and Oceania, where governments narrowed earlier open rules.
United Kingdom
The British Nationality Act 1981 ended automatic citizenship for everyone born on British soil.7Legislation.gov.uk. British Nationality Act 1981 Since January 1, 1983, a child born in the UK is a British citizen at birth only if at least one parent is a British citizen or is “settled” in the UK, which generally means holding indefinite leave to remain or similar permanent residency.8GOV.UK. Automatic Acquisition Nationality Policy Guidance A child who doesn’t qualify at birth can register as a citizen after living in the UK for the first ten years of life. Applicants over ten also face a “good character” test that can disqualify those with criminal convictions.
Australia
Australia moved to a conditional system in 1986. A child born on Australian soil after that date is a citizen at birth only if at least one parent is an Australian citizen or permanent resident. A child who doesn’t meet that condition can still acquire citizenship after living in Australia for the entire first ten years of life.9Australian Government. Australian Citizenship Amendment Act 1986
Germany
Germany relied entirely on jus sanguinis until 2000. Under the original reform, a child born in Germany to non-German parents received citizenship if at least one parent had lived in the country legally for eight years with a permanent right of residence. A 2024 modernization act cut that parental residency requirement to five years.10Federal Foreign Office. Law on Nationality The same reform ended the old rule that forced these children to choose one nationality by age 23. Children born under the jus soli provision now keep both their German citizenship and their parents’ nationality permanently.
France
France uses a deferred model. A child born in France to foreign parents does not become French at birth. Citizenship is acquired through residency over time, with three routes tied to age. At 18, a person born in France automatically becomes French if they have lived in France for at least five years since age 11 and are residing there on their 18th birthday. Between 16 and 18, the individual can file a declaration under the same test. For children between 13 and 16, parents can file on the child’s behalf, but the residency threshold is five years since age 8.
New Zealand
New Zealand ended unconditional jus soli on January 1, 2006. Anyone born in New Zealand before that date is a citizen by birth. For births on or after that date, at least one parent must be a New Zealand citizen or hold a visa permitting indefinite residence.11New Zealand Government. Types of Citizenship – Birth, Descent and Grant
Countries That Ended Automatic Birthright Citizenship
Several countries once granted citizenship to everyone born on their territory and later pulled back, usually after public debate over immigration or national identity.
India
India originally granted citizenship by birth to anyone born in the country from January 26, 1950, onward. A series of amendments progressively tightened the rule. The Citizenship (Amendment) Act of 2003, effective in 2004, made the current rule: a child born in India is a citizen by birth only if both parents are Indian citizens, or if one parent is a citizen and the other is not an “illegal migrant.”12India Code. The Citizenship (Amendment) Act, 2003 The “illegal migrant” qualifier can block citizenship for children of one Indian parent when the other entered without authorization.
Ireland
Ireland reversed course by referendum. Until 2005, anyone born on the island of Ireland had an automatic constitutional right to citizenship. The 27th Amendment, approved in 2004, removed that guarantee. Since January 1, 2005, a child born in Ireland to non-Irish, non-British parents qualifies only if at least one parent was legally resident in Ireland for three of the four years immediately before the birth. Time spent on a student visa or while awaiting an asylum decision does not count.13Citizens Information. Entitlement to Irish Citizenship
Malta
Malta shifted to a parentage-based system on August 1, 1989. Before then, birth on Maltese territory was generally sufficient. After the reform, a child born in Malta is a citizen only if at least one parent is a Maltese citizen at the time of birth.14Aġenzija Komunità Malta. Acquisition of Citizenship
The Diplomat Exception Applies Everywhere
Even the most generous jus soli countries exclude children of foreign diplomats. In the United States, the exclusion flows from the Fourteenth Amendment’s phrase “subject to the jurisdiction thereof,” which has been read since the 1800s to exclude children of accredited foreign diplomatic officers because those officers are not subject to U.S. law in the ordinary way.15Congress.gov. Amdt14.S1.1.2 Citizenship Clause Doctrine USCIS policy states plainly that a child born in the United States to a foreign diplomatic officer accredited to the United States is not a U.S. citizen at birth.16U.S. Citizenship and Immigration Services. Green Card for a Person Born in the United States to a Foreign Diplomat Brazil, Argentina, and Mexico apply parallel exclusions. The logic is consistent: diplomats represent a foreign sovereign, so their children take the parents’ nationality rather than the host country’s.
Statelessness Safety Valve
Birthright rules matter most where they leave gaps. A child born in a jus sanguinis country to parents whose country won’t pass citizenship along can end up stateless. The 1961 Convention on the Reduction of Statelessness addresses this directly. Article 1 requires signatories to grant nationality to any person born on their territory who would otherwise be stateless, either automatically at birth or through an application that cannot be refused.17United Nations. Convention on the Reduction of Statelessness Countries requiring an application may demand habitual residence of up to five years before the application (or ten years total), may exclude those convicted of serious offenses, and may set age windows between 18 and 21. Spain, for example, grants citizenship to children born on Spanish territory who would not otherwise acquire any nationality from their parents’ home country, and several other European countries with strict jus sanguinis rules include similar safety valves.
What Birthright Citizenship Can Cost You Later
Being born a citizen of a country can carry lifetime obligations, and the United States is the sharpest example. The U.S. is one of only two countries in the world (the other is Eritrea) that taxes citizens on worldwide income regardless of where they live. Someone born in the United States who moved abroad as an infant is still required to file U.S. tax returns and report income from every source.18Internal Revenue Service. U.S. Citizens and Resident Aliens Abroad Many accidental dual citizens don’t discover this until years or decades in.
Several reporting layers sit on top of the return. The Foreign Earned Income Exclusion lets you exclude up to $132,900 of foreign earned income for 2026 if you file Form 2555 and meet either the bona fide residence or physical presence test.19Internal Revenue Service. Figuring the Foreign Earned Income Exclusion FBAR (FinCEN Form 114) is required if foreign financial accounts exceed $10,000 in aggregate at any point during the year.20FinCEN.gov. Report Foreign Bank and Financial Accounts FATCA (Form 8938) requires reporting specified foreign financial assets above $200,000 on the last day of the tax year or $300,000 at any time during the year for individual filers abroad.21Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets Willful failure to file an FBAR can draw penalties of up to $100,000 or 50% of the account balance, whichever is greater. Non-willful violations carry up to $10,000 per account per year.
Renouncing Birthright Citizenship
Some dual citizens decide the burden isn’t worth it. The United States charges a $450 administrative fee to process a renunciation at an embassy or consulate, down from the $2,350 fee in place since 2014. The bigger cost is the exit tax. If you qualify as a “covered expatriate,” the tax code treats all your worldwide assets as if sold on the day before you renounced. You are a covered expatriate if your net worth is $2 million or more, or if your average annual U.S. income tax liability for the five prior years exceeds an inflation-adjusted threshold (roughly $211,000 for 2026). The mark-to-market rule applies an exclusion of about $910,000 for 2026 before tax is owed on unrealized gains. Retirement accounts, deferred compensation, and interests in certain trusts have separate tax treatment.22Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation
Other countries take a different line. Argentina treats renunciation as suspending political rights rather than ending nationality. Some countries won’t process a renunciation at all if it would leave the person stateless. Before renouncing anywhere, confirm that you already hold citizenship in at least one other country.