How Do People Become Dual Citizens?
Dual citizenship typically arises through several scenarios:
Birth circumstances:
Born in the U.S. to foreign parents (jus soli citizenship + parents' country jus sanguinis)
Born abroad to U.S. citizen parents in a country with jus soli citizenship
Born to U.S. citizen and foreign citizen parents
Naturalization scenarios:
Foreign citizen naturalizes as U.S. citizen, retaining original citizenship
U.S. citizen naturalizes in another country
Marriage-based citizenship in some countries
Operation of law:
Automatic citizenship through descent
Reacquisition of ancestral citizenship under specific country laws
What Is Jus Soli vs Jus Sanguinis?
These are two principles for determining citizenship at birth:
Jus soli (right of soil): Citizenship determined by place of birth. The U.S. follows this principle, granting citizenship to almost everyone born on U.S. soil.
Jus sanguinis (right of blood): Citizenship determined by parental citizenship. Many countries follow this principle.
Combined application: Dual citizenship often results from a child being born in a jus soli country to parents from jus sanguinis countries.
Example: A child born in the U.S. (jus soli) to Italian parents (jus sanguinis) is born a citizen of both the U.S. and Italy.
What Are U.S. Rules on Dual Citizenship?
U.S. law treats dual citizenship neutrally:
Allowed: U.S. law does not prohibit dual citizenship. Citizens can hold other nationalities without violating U.S. law.
Not encouraged or discouraged: The U.S. government takes no position on whether citizens should hold other nationalities.
Voluntary renunciation possible: U.S. citizens can voluntarily renounce U.S. citizenship, but this requires specific procedures and has serious consequences.
Loss of citizenship rare: U.S. citizenship is rarely lost involuntarily. Most actions that historically caused loss now do not.
When Does U.S. Citizenship Loss Occur?
Specific actions can result in U.S. citizenship loss:
Voluntary renunciation: Formally renouncing U.S. citizenship at U.S. embassy or consulate abroad, with intent to relinquish.
Service in foreign armed forces: Generally does not cause loss unless serving in war against U.S. or as commissioned officer.
Foreign government service: Service in policy-making positions of foreign governments may affect status in some cases.
Treason: Acts of treason against the United States.
Original Supreme Court framework: Modern law requires both the act AND the specific intent to relinquish citizenship. Mere acts alone, without that intent, generally don't result in loss.
The standard for loss is high. Most dual citizens retain U.S. citizenship despite their other nationality.
What Rights Do Dual Citizens Have?
Dual citizens enjoy full rights of both citizenships:
U.S. citizen rights:
Voting in U.S. elections
U.S. passport issuance
Diplomatic protection abroad
Right to live and work in the U.S.
Petition family members for immigration
Federal employment eligibility
Military service eligibility
Other country rights: Vary by country, but generally include:
Voting in that country's elections
Passport from that country
Right to live and work there
Property ownership rights
Various social benefits
Travel benefits: Dual citizens often have flexibility traveling in both countries and sometimes others (depending on visa-free travel agreements).
Do Dual Citizens Have Special Obligations?
Yes, with both countries:
U.S. obligations regardless of residence:
Annual tax filing on worldwide income
Selective Service registration for males 18-25
Compliance with U.S. laws when in U.S. or under U.S. jurisdiction
Foreign bank account reporting (FBAR) if applicable
Voting and jury duty when in U.S.
Other country obligations: Vary by country but often include:
Tax obligations under that country's system
Military service requirements (some countries)
Voting obligations (some countries)
Compliance with that country's laws
These obligations exist simultaneously, sometimes creating complex situations.
What About Travel Considerations?
Dual citizens face specific travel rules:
Entering the U.S.: U.S. citizens, including dual citizens, must use U.S. passport when entering the U.S.
Departing the U.S.: U.S. citizens generally use U.S. passport when boarding international flights from U.S. airports.
Other country entries: Use other country's passport when entering that country (often required by law).
Third-country travel: Choose passport offering best visa-free access for specific destination.
How Does the U.S. Passport Requirement Work?
The U.S. passport rule for U.S. citizens entering the U.S. is strict:
Mandatory requirement: U.S. citizens must enter the U.S. on U.S. passport.
Even with valid foreign passport: A U.S. citizen with foreign passport who lacks valid U.S. passport may be denied boarding by airlines.
Application difficulties: Without a U.S. passport, applying for emergency travel documents at U.S. embassies abroad can be necessary.
Always travel with U.S. passport: Best practice for U.S. citizen dual nationals.
This rule is enforced by airlines on behalf of CBP. Failing to present U.S. passport can prevent boarding even with other valid travel documents.
Tax Considerations for Dual Citizens
U.S. tax obligations are complex for dual citizens:
Citizenship-based taxation: U.S. taxes citizens on worldwide income regardless of residence. The U.S. is one of few countries with this approach.
Filing requirements: Annual U.S. tax returns required for U.S. citizens earning above filing thresholds, even if living abroad.
Foreign earned income exclusion: Up to specific amount of foreign earned income excludable for qualifying citizens (currently approximately $130,000+).
Foreign tax credit: Credit for foreign taxes paid reduces double taxation.
FBAR requirements: Foreign Bank Account Report required for accounts exceeding $10,000.
FATCA reporting: Foreign Account Tax Compliance Act requires reporting foreign financial assets.
What Are Common Tax Pitfalls?
Dual citizens often encounter tax issues:
Failure to file U.S. taxes while living abroad: Many dual citizens unknowingly violate U.S. tax law by not filing while residing in their other country.
FBAR penalties: Failure to file FBAR can result in substantial penalties.
Streamlined procedures: IRS offers streamlined procedures for non-willful non-filing dual citizens to come into compliance.
Tax treaties: Many countries have tax treaties with the U.S. that may reduce double taxation.
Consulting cross-border tax specialists is highly recommended for dual citizens.
Special Situations and Considerations
Military service: Some countries require military service from their citizens. U.S. citizens serving in foreign militaries should carefully consider implications.
Government employment: U.S. citizenship can affect eligibility for government positions in the other country, and vice versa.
Children's citizenship: Children of U.S. citizens may automatically be U.S. citizens, depending on parents' situations and child's birthplace.
Renunciation considerations: Renouncing U.S. citizenship has serious consequences including expatriation tax for high net worth individuals.
What If Countries Have Conflicts?
Some countries don't permit dual citizenship:
Renunciation requirements: Some countries require renouncing other citizenships before naturalization or for certain positions.
Conflict situations: Crisis between two countries can put dual citizens in difficult positions.
Practical approach: Most modern countries accept dual citizenship without conflict.
Specific country research: Always research specific dual citizenship rules for both countries involved.
Consult with immigration and nationality attorneys when complex dual citizenship situations arise.
How Do Children Acquire Dual Citizenship?
Children often acquire dual citizenship at birth:
Born in U.S. to foreign parents: Child is U.S. citizen by birth (jus soli) and may also be foreign citizen through parents (jus sanguinis).
Born abroad to U.S. citizen parent: May acquire U.S. citizenship through parent (with conditions) and citizenship of birth country.
Born to two U.S. citizens abroad: U.S. citizenship typically transfers, plus possibly birth country citizenship.
Specific country rules: Each country has its own rules about children's citizenship.
Can Children Choose Citizenship?
Generally yes, with limitations:
At birth: Children typically don't choose; citizenship is assigned by law.
At majority: Some countries allow choice or require renunciation at majority age.
Lifetime citizenship: U.S. citizenship is generally for life unless voluntarily renounced.
Some countries may limit: Some countries have time limits or require specific actions to retain citizenship.
Document children's citizenship status carefully and understand both countries' requirements.
