Dual Citizenship — Rights and Obligations of Dual Nationals

The United States has never formally recognized dual citizenship in its immigration statutes, yet it has de facto permitted it for decades. The evolution from hostility to acquiescence reflects two Supreme Court decisions — Afroyim v. Rusk (1967) and Vance v. Terrazas (1980) — that severely constrained Congress's power to strip citizenship without the citizen's voluntary intent to relinquish it. Today, millions of Americans hold citizenship in another country simultaneously, and millions of foreign nationals naturalize in the United States without the U.S. government requiring them to actually surrender their prior nationality. The practical result is a large population with rights and obligations in two legal systems — including dual tax exposure, dual passport rights, and potential dual military service obligations — navigating rules that neither government fully coordinates. For the formal ways U.S. citizenship can be lost, see loss of U.S. citizenship. For the financial reporting obligations that affect Americans abroad, see FATCA and foreign account reporting. For the path to citizenship through naturalization, see naturalization and citizenship.

Current Law (2026)

Legal Authority

• 8 U.S.C. § 1481 — Lists the seven categories of voluntary expatriating acts that can terminate U.S. citizenship: (1) naturalizing in a foreign state voluntarily; (2) taking an oath of allegiance to a foreign state; (3) serving in the armed forces of a foreign state engaged in hostilities against the U.S., or as an officer; (4) working for a foreign government and acquiring that nationality; (5) formally renouncing U.S. citizenship before a U.S. diplomatic officer; (6) formally renouncing inside the U.S. in wartime; (7) committing treason or related acts
• 8 U.S.C. § 1401 — Establishes jus soli citizenship: persons born in the United States and subject to its jurisdiction are citizens at birth
• 8 U.S.C. §§ 1401(c)–(g) — Establishes jus sanguinis citizenship: rules for citizenship by descent through U.S. citizen parents, including residency and physical presence requirements that vary by year of birth and parental marital status
• 8 U.S.C. § 1427 — Sets naturalization requirements including the oath of allegiance, which renounces allegiance to foreign sovereigns but does not compel the person to formally surrender foreign nationality
• Afroyim v. Rusk, 387 U.S. 253 (1967) — Held that Congress lacks constitutional authority to involuntarily strip citizenship from a citizen who voted in a foreign election; the Fourteenth Amendment guarantees citizenship that can only be relinquished voluntarily
• Vance v. Terrazas, 444 U.S. 252 (1980) — Refined Afroyim: the government must prove by a preponderance of evidence that the citizen performed a potentially expatriating act with the specific intent to relinquish citizenship; intent cannot be presumed from the act alone
• State Department Foreign Affairs Manual, 7 FAM 1200 — Administrative guidance implementing expatriation law; reflects the post-Vance policy that U.S. citizens who naturalize in a foreign country while intending to retain U.S. citizenship do not lose it
• 26 U.S.C. § 911 (Foreign Earned Income Exclusion) — Allows U.S. citizens abroad to exclude up to $126,500 (2024, indexed) in foreign earned income from U.S. taxation
• 26 U.S.C. § 877A (Exit Tax) — Imposes a mark-to-market deemed sale tax on "covered expatriates" who renounce — those with net worth over $2 million or average annual net income tax liability over $201,000 (2024)
• 31 U.S.C. § 5314 (FBAR) — Requires U.S. persons with foreign financial account aggregates exceeding $10,000 to file FinCEN Form 114 annually

How It Works

How Dual Citizenship Arises

Dual citizenship arises through four main mechanisms. Jus soli (birthright): a child born in the United States to foreign national parents acquires U.S. citizenship automatically under the Fourteenth Amendment and 8 U.S.C. § 1401; if the parents' home country grants citizenship by descent or to nationals' children born abroad, the child simultaneously acquires that citizenship — dual nationality from birth, common for children of Mexican, Canadian, Italian, Irish, and many other nationals. Jus sanguinis (citizenship by descent): a child born abroad to U.S. citizen parent(s) may acquire U.S. citizenship at birth under 8 U.S.C. § 1401 or § 1409, while also acquiring the birth country's citizenship or the non-U.S. parent's citizenship; for births after November 14, 1986, the U.S. citizen parent must have been physically present in the U.S. for at least 5 years before the birth, at least 2 of which were after age 14. U.S. citizen naturalizing abroad: voluntarily naturalizing in another country is a potentially expatriating act under 8 U.S.C. § 1481(a)(1), but under Vance v. Terrazas (1980) the U.S. citizen retains citizenship unless they intended to relinquish it; the State Department's current interpretation holds that most naturalizations abroad do not reflect that intent, so millions of Americans have naturalized in other countries and continue using their U.S. passports without legal consequence. Foreign national naturalizing as U.S. citizen: the naturalization oath (8 U.S.C. § 1448) requires renouncing "all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty" — but the U.S. does not compel the new citizen to formally surrender prior citizenship to the foreign government; whether the prior citizenship is lost depends entirely on the other country's law (India, Japan, and China automatically strip nationality; Mexico, Italy, Israel, and Canada do not).

Practical Rights of Dual Nationals

A dual national may hold and use both countries' passports. The U.S. government requires U.S. citizens to enter and exit the United States on a U.S. passport (8 U.S.C. § 1185) — using a foreign passport to enter the U.S. is technically a violation but is not treated as an expatriating act and is rarely enforced. Using the other country's passport when traveling to and from that country is standard practice and may be legally required. Dual nationals generally have voting rights in both countries subject to each country's electoral laws; voting in a foreign election is listed among the expatriating acts in 8 U.S.C. § 1481(a)(5), but under Vance v. Terrazas it terminates citizenship only with specific intent to relinquish — the State Department does not pursue loss of nationality for dual nationals who vote in their other country's elections.

Dual nationals may own property, inherit, and engage in commerce in both countries under both legal systems, with some countries restricting foreign ownership but not ownership by their own nationals — a meaningful economic advantage dual citizenship can provide. The most important practical limitation is consular protection: the United States generally cannot provide consular assistance to dual nationals when they are in the country of their other citizenship. If a U.S.-Mexican dual national is arrested in Mexico, the U.S. Embassy has limited practical authority because Mexico may treat the individual as a Mexican national. Do not assume U.S. consular protection is available everywhere a U.S. passport is valid.

Obligations of Dual Nationals

The most consequential obligation of U.S. dual nationals is worldwide income taxation. The United States, along with Eritrea, taxes its citizens on all income regardless of where they live — a dual national residing in Germany or Canada owes U.S. taxes on income earned there, offset by foreign tax credits and the Foreign Earned Income Exclusion (up to $126,500 in 2024). Filing obligations continue indefinitely while U.S. citizenship is maintained; U.S. citizens abroad must file a federal return whenever gross income exceeds the standard deduction (approximately $14,600 for single filers in 2024). In addition, any U.S. person with a financial interest in or signature authority over foreign bank accounts exceeding $10,000 in aggregate at any point during the year must file FinCEN Form 114 (FBAR) by April 15 — willful failure carries civil penalties up to 50% of the account balance per year plus criminal liability; non-willful penalties reach $10,000 per violation. Dual nationals living abroad with ordinary local bank accounts routinely cross this threshold.

FATCA (Form 8938) adds another layer: U.S. citizens must report foreign financial assets on Form 8938 attached to their tax return, with thresholds of $50,000 at year-end or $75,000 at any point for single filers in the U.S. ($200,000/$300,000 for those living abroad). FATCA also requires foreign financial institutions to report U.S. account holders to the IRS, which is why many foreign banks now ask about U.S. citizenship and some refuse to open accounts for U.S. persons. Military service obligations can also bifurcate: some countries (South Korea, Israel, Greece) require their nationals to complete military service regardless of foreign citizenship. Serving in a foreign military can be an expatriating act under 8 U.S.C. § 1481(a)(3) if done voluntarily with intent to relinquish U.S. citizenship, though service in allied militaries generally doesn't trigger this provision absent a hostile officer's commission.

Countries That Restrict or Prohibit Dual Citizenship

Several major countries automatically strip their nationals of citizenship upon voluntary foreign naturalization:

• India: Persons of Indian Origin who become citizens of another country lose Indian citizenship automatically. India does not recognize dual citizenship; the Overseas Citizen of India (OCI) card provides some benefits but is not citizenship.
• Japan: Japanese law requires nationals who voluntarily acquire a foreign nationality to choose one or the other by age 22; continued possession of foreign citizenship can lead to loss of Japanese citizenship.
• China: Chinese law does not recognize dual citizenship; naturalization in a foreign country automatically terminates Chinese nationality.
• Germany: Germans who voluntarily naturalize in a non-EU country generally lose German citizenship, with exceptions. EU citizens naturalizing as Germans may retain dual citizenship.
• Austria: Austria generally requires renunciation of prior citizenship before granting Austrian citizenship, with narrow exceptions.
• Singapore: Singapore strictly prohibits dual citizenship; foreign-born permanent residents who acquire Singaporean citizenship must renounce prior nationality.

For U.S. citizens naturalizing in these countries, the foreign country's requirements effectively force a real choice even if U.S. law does not. A U.S. citizen who naturalizes as a German citizen (in a case without an exception) will lose their German citizenship if they also retain U.S. citizenship.

Renunciation of U.S. Citizenship

A U.S. citizen may formally renounce citizenship under 8 U.S.C. § 1481(a)(5) by appearing in person before a U.S. diplomatic or consular officer in a foreign country and signing an oath of renunciation (DS-4079 application; Form DS-4080 for actual oath). Renunciation is irrevocable once approved — you cannot change your mind after the oath is administered and the loss of nationality is documented by a Certificate of Loss of Nationality.

Fee: $2,350, paid at the time of renunciation appointment. This fee, introduced in 2014 (increased from $450), is among the highest renunciation fees of any country in the world.

Wait times: As of April 2026, consulate appointment queues for renunciation range from 1 to 5 years at many posts. High-demand posts in Switzerland, Germany, Canada, and the United Kingdom have multi-year backlogs due to a combination of tax-motivated renunciations and limited consular capacity.

A "covered expatriate" — someone with net worth exceeding $2 million, average annual net income tax liability over $201,000 (2024, indexed), or who has not certified 5 years of U.S. tax compliance — is subject to an exit tax under 26 U.S.C. § 877A that treats all assets as if sold at fair market value on the day before expatriation, with an $821,000 (2024, indexed) exclusion; any gain is taxed at capital gains rates in the year of expatriation. Failing to certify tax compliance is itself a basis for covered-expatriate status, so getting current on filings before renouncing is critical. 8 U.S.C. § 1182(a)(10)(E) (the Reed Amendment) bars former U.S. citizens who renounced to avoid taxes from re-entering the United States — the provision is rarely enforced because the IRS doesn't systematically share renunciation data with CBP, but it remains on the books.

How It Affects You

U.S. citizen living abroad in a country where you also hold citizenship. Your most urgent obligation is U.S. tax and disclosure compliance. You must file a U.S. federal tax return each year, claiming the Foreign Earned Income Exclusion (Form 2555) and/or the Foreign Tax Credit (Form 1116) to reduce or eliminate double taxation on income taxed by your country of residence. If you have any bank accounts in your country of residence — which you almost certainly do — you likely owe FBAR filing (FinCEN 114) each year. If your aggregate foreign accounts exceeded $10,000 at any point in 2024, the FBAR was due October 15, 2025 (automatic extension). If you have not been filing FBARs, the IRS has a Streamlined Foreign Offshore Procedures program allowing late filers to come into compliance with reduced penalties. Failure to use this pathway before IRS discovers non-compliance results in much larger penalties.

Child born in the United States to foreign national parents. Your child is a U.S. citizen from birth under the Fourteenth Amendment and 8 U.S.C. § 1401, regardless of your immigration status. Your child may simultaneously hold the citizenship of your home country if that country grants citizenship to children of its nationals born abroad. To document U.S. citizenship, obtain a U.S. passport (DS-11 application) or a Consular Report of Birth Abroad if the child is registered at a U.S. consulate. For your home country citizenship, register the child's birth with your country's consulate in the U.S. Note: if your home country is India, China, or Japan, those countries may not recognize the dual citizenship, which affects the child's practical rights there.

Person considering naturalizing as a U.S. citizen who does not want to lose their prior citizenship. Research your prior country's law first. Countries like Mexico, Italy, Israel, Canada, the United Kingdom, Australia, France, and most Latin American countries do not strip citizenship for foreign naturalization — you can generally become a U.S. citizen and retain your prior nationality. Countries like India, Japan, China, and several others will automatically strip your nationality. The U.S. naturalization oath renounces allegiance as a legal matter but does not require you to formally surrender your prior passport to your original government. If your country does not require you to surrender it, you can naturalize as a U.S. citizen and continue holding both. Consult an attorney in your home country to confirm the specific rules before naturalizing.

Dual national considering renouncing U.S. citizenship due to tax burden. This is a significant and irrevocable decision. Before proceeding: (1) Get current on all U.S. tax filings for the past 5 years — being a covered expatriate due to non-compliance is avoidable; (2) Calculate whether you are a "covered expatriate" under the net worth or income tests — if you are, engage a U.S. tax attorney to plan the exit tax before the renunciation date; (3) Budget for the $2,350 fee and a multi-year wait for an appointment at the consulate in your country of residence; (4) Confirm you have or will have another citizenship before renouncing, because statelessness is not permitted and USCIS will not approve renunciation if it would render you stateless; (5) Understand that the Reed Amendment theoretically bars tax-motivated renouncers from re-entering the U.S., though enforcement is rare. Annual renunciation counts have risen from a few hundred pre-2010 to 5,000–9,000 per year in recent years, primarily driven by tax and disclosure compliance burden.

U.S. citizen abroad whose foreign bank is refusing service or asking uncomfortable questions. FATCA requires foreign financial institutions to report U.S. account holders to the IRS or face a 30% withholding penalty on their U.S.-source income. Many foreign banks have responded by refusing to open accounts for U.S. persons or closing existing accounts. If your bank is asking about U.S. citizenship or tax residency, you are legally required to answer accurately — providing false information constitutes fraud. If your bank closes your account, you may need to use U.S.-based online banks that can serve customers abroad (Charles Schwab's international brokerage is widely used by Americans abroad), or find a local institution that accepts U.S. persons. The Foreign Account Tax Compliance Act was intended to catch offshore tax evaders but has burdened millions of ordinary dual nationals living abroad with compliance costs and banking access problems.

State Variations

Dual citizenship is exclusively a matter of federal and foreign law — states have no authority to grant or revoke citizenship. However, states affect dual nationals in several practical ways:

State income taxes. States that impose income taxes generally follow federal citizenship-based taxation. A dual national who is a California domiciliary owes California income tax on worldwide income even if living abroad, unless they establish domicile elsewhere. California's "safe harbor" for temporary absences is limited; some dual nationals who intend to remain abroad must formally change their domicile to avoid California's exit tax and continued state tax liability.

Voting rights. Some states have moved toward stricter verification of U.S. citizenship for voter registration. Dual nationals who are U.S. citizens have the same voting rights as any other U.S. citizen. Voting in a U.S. election as a non-citizen is illegal; dual nationals who are not U.S. citizens but hold permanent resident status do not have the right to vote in federal or state elections.

Driver's licenses and professional licensing. States generally issue driver's licenses and professional licenses based on lawful presence — dual nationals who are U.S. citizens or lawful permanent residents qualify on the same basis as other residents.

Implementing Regulations

• 22 C.F.R. § 50.50 — State Department regulations on loss of nationality and the expatriation process
• 7 FAM 1200 (Foreign Affairs Manual) — Detailed State Department guidance on loss of nationality findings, administrative procedures, and the post-Vance intent analysis; reflects the practical policy that dual nationality is tolerated
• 26 C.F.R. § 1.877A — Treasury regulations implementing the exit tax on covered expatriates
• 31 C.F.R. § 1010.350 — FinCEN FBAR regulations implementing 31 U.S.C. § 5314
• 26 C.F.R. § 1.6038D — IRS FATCA Form 8938 regulations implementing 26 U.S.C. § 6038D
• IRS Publication 54 — Tax guide for U.S. citizens and resident aliens abroad; covers FEIE, foreign tax credit, and filing obligations
• IRS Publication 4261 — Overview of FBAR requirements for U.S. persons with foreign accounts

Pending Legislation

Residence-based taxation bills. Democrats Abroad and advocacy groups for Americans abroad have for years pushed for the U.S. to shift from citizenship-based to residence-based taxation (the norm in almost every other country). Bills to this effect have been introduced in multiple Congresses — most recently the Tax Simplification for Americans Abroad Act — but have not received committee votes. The change would eliminate the primary financial burden driving renunciations.

Birthright citizenship executive orders. President Trump signed an executive order on January 20, 2025 purporting to deny birthright citizenship to children born in the U.S. to parents who are neither citizens nor lawful permanent residents. Multiple federal courts immediately enjoined the order as inconsistent with the Fourteenth Amendment. The Supreme Court agreed to hear the case on an expedited basis; the injunctions remained in effect as of April 2026 and birthright citizenship continued to apply under the existing constitutional interpretation.

FBAR penalty reform. Bills to reduce FBAR penalties for non-willful violations have been introduced in response to IRS enforcement actions against unsophisticated dual nationals with ordinary foreign bank accounts. The Supreme Court's 2023 decision in Bittner v. United States held that non-willful FBAR violations accrue on a per-report basis (maximum $10,000 per year's report) rather than per account, providing some relief.

Recent Developments

Birthright citizenship litigation (2025–2026). Trump's executive order on birthright citizenship is the highest-profile dual-citizenship-adjacent legal development. Courts have unanimously blocked implementation pending Supreme Court review. The case raises questions about the scope of the Fourteenth Amendment's "subject to the jurisdiction thereof" clause, with the government arguing that children of visa overstays and undocumented immigrants are not subject to U.S. jurisdiction in the relevant sense. Constitutional scholars broadly expect the order to be struck down.

Renunciation queue backlog. The combination of FATCA-driven banking access problems, worldwide taxation, and FBAR compliance burdens has sustained high renunciation demand. Consulates in high-income countries with large American expatriate populations — Switzerland, Germany, the Netherlands, Canada — have appointment backlogs of 3–5 years. The State Department has not significantly increased consular capacity for renunciation processing.

Denaturalization efforts. The Trump administration announced plans to review thousands of naturalization cases for potential denaturalization through the Denaturalization Section of the DOJ. Denaturalization (as distinct from renunciation) requires a court order and is limited to cases involving fraud or willful misrepresentation in the naturalization process. Naturalized citizens who have become dual nationals are not subject to denaturalization simply for holding dual citizenship; the legal basis must be conduct at the time of naturalization.

FATCA burden on Americans abroad. The European Parliament issued a resolution in 2022 calling on the EU to negotiate with the U.S. to protect EU citizens who are also American nationals from the banking access problems created by FATCA. Some European financial institutions have developed dedicated service lines for U.S. persons; others have maintained blanket exclusions. No bilateral agreement modifying FATCA obligations for dual nationals in EU countries has been reached.