If you hold U.S. citizenship along with another nationality, the core rule for dual citizenship U.S. travel and passport requirements is simple: you must enter and leave the United States on a valid U.S. passport, even when your other country has issued you one of its own. Federal law makes this the default for every U.S. citizen, and a foreign passport does not satisfy the obligation.1Office of the Law Revision Counsel. 8 USC 1185 – Travel Control of Citizens and Aliens2eCFR. 22 CFR Part 53 – Passport Requirement and Exceptions The complication is that your other country often expects the opposite, so most dual-citizen trips involve carrying both passports and knowing which one to present at which counter.
Which Passport to Use Where
Use your U.S. passport for U.S. departure and U.S. entry. Use your other country’s passport to enter that country when its laws require citizens to arrive on the national document. Many countries do require this, and presenting only your U.S. passport can mean being processed as a foreign visitor with visa restrictions and limited stays, or being turned away until you produce the correct document.
Contact the embassy or consulate of your other country before you travel to confirm what they require. Some nations layer on electronic travel authorizations or customs declarations that differ from the foreign-visitor forms. Watch for minimum validity rules as well: many countries will refuse entry if your passport expires within six months of your arrival date, even though the document is technically still valid.
The European Union’s forthcoming European Travel Information and Authorisation System illustrates the point. Dual citizens who hold citizenship in an EU country covered by ETIAS (or in Ireland) are exempt from the authorization, but only if they travel on the European passport rather than the American one. If that European passport has expired, you have to renew it through the issuing country’s authorities before you go.3European Union. Dual Citizenship and ETIAS
Land, Sea, and Cruise Exceptions
The strict passport-book requirement applies to air travel. Under the Western Hemisphere Travel Initiative, if you cross by land or sea from Canada, Mexico, Bermuda, or certain Caribbean nations, several alternatives are accepted:4U.S. Customs and Border Protection. Western Hemisphere Travel Initiative
- A U.S. passport card, a wallet-sized card that costs less than the book but cannot be used for international air travel.5U.S. Department of State. Get a Passport Card
- An enhanced driver’s license from a participating state.
- A NEXUS, SENTRI, or FAST card from CBP’s trusted traveler programs.
- A military ID when traveling on official orders.
Children under 16 crossing by land or sea can present a birth certificate or other proof of citizenship instead of a passport. Closed-loop cruises that depart from and return to the same U.S. port allow adult passengers to board with a birth certificate and government-issued photo ID, though you should still check the entry rules of any foreign ports on the itinerary.
Applying for and Renewing Your U.S. Passport
First-time applicants and anyone who cannot renew by mail use Form DS-11, submitted in person at an acceptance facility. Eligible renewals use Form DS-82, submitted by mail or online.6U.S. Department of State. Passport Forms A new adult passport book costs $165 total: a $130 application fee to the State Department plus a $35 execution fee at the acceptance facility.7U.S. Department of State. United States Passport Fees for Acceptance Facilities Renewals are $130 with no execution fee.8U.S. Department of State. Renew Your Passport by Mail Expedited processing adds $60 and shortens the timeline to roughly two to three weeks.
Common mistakes that stall an application include a missing signature, a photo that fails biometric standards, incorrect fees, or forgetting to send your most recent passport along with a renewal. The State Department mails a letter explaining the issue and you resubmit with the letter and corrected materials. Check your expiration date well before booking.
Children’s passports are not renewable. Anyone under 16 must apply fresh each time using Form DS-11, and both parents or legal guardians generally need to appear in person. If one parent cannot be there, the absent parent signs Form DS-3053, a notarized statement of consent that expires 90 days after signing.9U.S. Department of State. Statement of Consent – Issuance of a U.S. Passport to a Minor Under Age 16 (Form DS-3053)
At the U.S. Border
At check-in, the airline scans your U.S. passport and transmits the data to CBP through the Advance Passenger Information System before departure.10U.S. Customs and Border Protection. Advance Passenger Information System Gate agents may check the document again before boarding. On arrival, a CBP officer or automated system verifies your identity, and anything that doesn’t match up can send you to secondary inspection.
The U.S. cannot permanently deny entry to its own citizens, so a citizen who arrives without a valid passport will not be turned away, but the CBP officer will report the situation to the State Department for a case-by-case waiver.2eCFR. 22 CFR Part 53 – Passport Requirement and Exceptions Expect extended questioning and long delays while officers verify who you are through other means.
Global Entry Disclosure
Dual citizens can apply for Global Entry and the other trusted traveler programs, but the application requires disclosing every citizenship you hold. List U.S. citizenship as primary and add passport information for each nationality separately. A frequent error is uploading a foreign passport under “Proof that you may enter the U.S.” when it belongs under “Proof of Other Citizenship.” If a document lands in the wrong section, delete it and re-add it to the correct one.11U.S. Customs and Border Protection. Trusted Traveler Programs Application – Documents Page
Where U.S. Consular Help Stops
When you are inside your other country of citizenship, the U.S. government’s ability to assist you shrinks. Under a widely recognized principle of international law, a country generally cannot provide diplomatic protection to one of its citizens while that person is on the territory of their other nationality. The State Department puts it plainly: its representations on your behalf “may or may not be accepted” by the other country.12U.S. Department of State Foreign Affairs Manual. 7 FAM 080 Dual Nationality
Arrest is the sharpest version of this. Treaties generally do not require consular notification when the detained person is also a citizen of the detaining country, even when that country otherwise mandates notification.13U.S. Department of State Foreign Affairs Manual. 7 FAM 410 Introduction to Arrest and Detention U.S. consular officers will still try to gain access on a courtesy basis, but the host government is not obligated to allow it, and local authorities can apply their own laws on military service, taxation, custody, and criminal matters without regard to your U.S. status.
Tax and Reporting Rules That Can Affect Travel
The U.S. taxes its citizens on worldwide income regardless of where they live or earn it.14Internal Revenue Service. Foreign Earned Income Exclusion A dual citizen living abroad still owes the IRS an annual return. Two mechanisms limit double taxation, but you have to claim them: the Foreign Earned Income Exclusion, which lets qualifying taxpayers exclude up to $132,900 in foreign earnings from 2026 U.S. taxable income,15Internal Revenue Service. Figuring the Foreign Earned Income Exclusion and the Foreign Tax Credit, which reduces your U.S. tax bill by income taxes already paid to a foreign government and is claimed on Form 1116.16Internal Revenue Service. Foreign Tax Credit You cannot use the credit on income already excluded through the FEIE.
Bank accounts in your other country frequently trigger reporting requirements. Any U.S. person whose foreign financial accounts exceeded $10,000 in aggregate at any point during the year must file an FBAR (FinCEN Form 114) by April 15, with an automatic extension to October 15. Penalties for missing it are steep and can be criminal in willful cases.17Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) Separately, FATCA may require Form 8938 with your tax return if your foreign financial assets exceed thresholds that start at $50,000 for U.S. residents and rise to $200,000 or more for taxpayers living abroad.18Internal Revenue Service. Summary of FATCA Reporting for U.S. Taxpayers The two filings are separate obligations with different thresholds, and many dual citizens have to do both.
Unpaid Taxes Can Cost You the Passport
The IRS can certify seriously delinquent tax debt to the State Department, which will then deny new passport applications or revoke an existing passport. For 2026, the threshold is federal tax debt above $66,000, including assessed penalties and interest.19Internal Revenue Service. Revocation or Denial of Passport in Cases of Certain Unpaid Taxes The IRS must have filed a federal tax lien or issued a levy first, so certification doesn’t happen without warning, but once it does, resolving the debt or entering an approved payment plan is the only way to get the passport back.
Selective Service and Foreign Military Service
Male dual citizens between 18 and 25 who live in the United States, or who are U.S. citizens living abroad, are required to register with the Selective Service System.20Selective Service System. Register with a Foreign Address Failing to register can affect federal student aid, government employment, and, for those who are also permanent residents, eventual U.S. citizenship.
Your other country may impose its own military service on citizens of a certain age. Traveling there could put you within reach of those laws, and the U.S. government generally cannot intervene when a country enforces conscription against its own citizen on its own territory.12U.S. Department of State Foreign Affairs Manual. 7 FAM 080 Dual Nationality If you are a male of conscription age who has never satisfied service obligations in your other country, check that country’s rules before booking the trip.