The main advantages and disadvantages of dual citizenship come down to a simple trade: you get two passports, two job markets, and access to benefits in both countries, but you keep two sets of obligations for life, including U.S. taxes on your worldwide income, foreign-account reporting, possible military duty abroad, and weaker protection from the U.S. government when you’re inside your other country of citizenship. U.S. law clearly permits holding two nationalities — the State Department states that “U.S. law does not require a U.S. citizen to choose between U.S. citizenship and another (foreign) nationality”1U.S. Department of State. Dual Nationality — so the real question isn’t whether you can, but whether the tradeoffs make sense for you.
The Advantages
Two Passports and Freer Travel
The most immediately useful benefit is carrying two passports. Each opens different doors: one may give you visa-free access to regions the other doesn’t, and you can enter and leave either country of citizenship without visas or entry-duration limits.
One rule matters at the border. U.S. dual nationals must use a U.S. passport to enter and leave the United States. The State Department notes that dual nationals “may also be required by the country of their foreign nationality to use that country’s passport to enter and leave that country,” and using the foreign passport for travel elsewhere “is not inconsistent with U.S. law.”1U.S. Department of State. Dual Nationality Many dual citizens carry both and present whichever fits the border they’re at.
Living and Working in Either Country Indefinitely
Citizenship in both countries means you can live and work in either one without visas or work permits, and without worrying about a residency status that lapses if you stay away too long. Permanent residency expires; citizenship doesn’t. That difference matters most for people who move back and forth over a career, or who want to keep a real option to return.
Property, Licensing, and Local Rules
Some countries restrict foreign nationals from buying real estate, especially agricultural land or property near borders and coastlines. Holding citizenship removes those restrictions. Certain professional licenses also require citizenship, so a second nationality keeps both job markets fully open.
Social Benefits and Political Rights
Depending on each country’s laws, dual citizens may qualify for government benefits in both nations, including public healthcare, education subsidies, and retirement pensions. That can matter especially for retirees who have contributed to both systems over a working life split between the two.
Dual citizens also hold political rights in both countries. U.S. law does not prohibit voting in foreign elections. Whether you can hold public office abroad depends on the other country’s rules; some bar dual citizens from government positions.
The Disadvantages
You Owe U.S. Taxes Wherever You Live
The United States is one of very few countries that taxes citizens on worldwide income regardless of where they live. Hold a U.S. passport, and you owe the IRS a federal return every year, even if you’ve lived abroad for decades and earn nothing inside the United States.2Internal Revenue Service. U.S. Citizens and Resident Aliens Abroad Dual citizens who acquired U.S. nationality at birth and never lived in the country are often stunned to learn this applies to them.
Two tools soften the double-tax problem. The foreign earned income exclusion lets qualifying taxpayers exclude a set amount of foreign earnings from U.S. tax, set at $130,000 for the 2025 tax year and adjusted annually for inflation.3Internal Revenue Service. Foreign Earned Income Exclusion The foreign tax credit offsets your U.S. bill dollar-for-dollar against income taxes already paid to another country. Between the two, most dual citizens abroad owe little or no additional U.S. tax. You still have to file to claim them.
Foreign Account Reporting: FATCA and FBAR
The filing burden goes beyond the tax return. Under the Foreign Account Tax Compliance Act (FATCA), you must report specified foreign financial assets on IRS Form 8938 if they exceed certain thresholds. Unmarried taxpayers living in the U.S. trigger the requirement at $50,000 on the last day of the tax year or $75,000 at any point during the year; unmarried taxpayers living abroad face much higher thresholds of $200,000 at year-end or $300,000 during the year.4Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
Separately, any U.S. person with foreign financial accounts whose aggregate value exceeds $10,000 at any time during the year must file a Report of Foreign Bank and Financial Accounts (FBAR) with the Financial Crimes Enforcement Network.5Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts The FBAR goes to FinCEN, not the IRS, and is filed separately from your tax return.6Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements Penalties are steep. The FBAR alone carries civil penalties of up to $10,000 per unreported account for non-willful violations, and substantially more for willful ones.
Foreign Banks May Refuse to Serve You
FATCA created a side effect that hits dual citizens directly. It requires foreign financial institutions to identify and report accounts held by U.S. citizens, and banks that refuse face a 30 percent withholding tax on U.S.-sourced payments. Many banks outside the U.S. have decided the compliance cost isn’t worth it and simply won’t open accounts for anyone with American citizenship. Dual citizens living abroad routinely report being turned away from local banks, or having existing accounts closed, solely because they hold a U.S. passport.
Social Security on Both Sides
Working in both countries can pull you into two Social Security systems at once. The U.S. has signed totalization agreements with numerous countries to prevent that, assigning coverage to one country at a time and letting workers combine credits across both systems to qualify for benefits.7Social Security Administration. U.S. International Social Security Agreements If your other country has no agreement with the U.S., you could owe Social Security contributions to both systems on the same earnings.
Military Service in Your Other Country
Some countries require all citizens to perform compulsory military service, including those who hold another nationality. If your second country has active conscription, you could face a legal obligation to serve even if you’ve lived primarily in the United States. This comes up often for male dual citizens of countries such as South Korea, Israel, Turkey, and Greece.
On the U.S. side, male dual nationals must register with the Selective Service System within 30 days of their 18th birthday, whether they live inside or outside the United States.8Selective Service System. Who Needs to Register Failing to register can affect eligibility for federal student aid, government employment, and naturalization.
Limited U.S. Help in Your Other Country
If you run into trouble in your other country of citizenship, the U.S. government may not be able to help. The State Department warns that dual nationals “may also face restrictions in the U.S. consular protections available to U.S. nationals abroad, particularly in the country of their other nationality.”1U.S. Department of State. Dual Nationality
Under a longstanding international principle known as the Master Nationality Rule, one country generally can’t provide diplomatic protection to a dual national against the other country of citizenship. If you’re detained there, local authorities may treat you exclusively as their citizen and refuse to let U.S. consular officials access you. Even direct requests to contact the U.S. embassy may be declined. This is especially likely if you entered on that country’s passport rather than your American one.
Security Clearance Scrutiny
Dual citizenship doesn’t automatically disqualify you from a U.S. security clearance, but it does draw scrutiny. Under Security Executive Agent Directive 4, which sets the adjudicative guidelines for clearance decisions, “foreign preference” is a listed concern. The guidelines flag exercising dual citizenship, possessing or using a foreign passport, voting in foreign elections, and accepting benefits like healthcare or retirement from a foreign government.9Office of the Director of National Intelligence. Security Executive Agent Directive 4 – National Security Adjudicative Guidelines
Mitigating factors exist. Dual citizenship that results solely from birth in a foreign country or from a parent’s citizenship, rather than an active choice, weighs in your favor. Willingness to renounce the foreign citizenship, surrendering a foreign passport, or showing that any exercise of foreign citizenship happened before you became a U.S. citizen can help. Anyone pursuing federal work that requires a clearance should expect the process to be longer and more complicated.
Whether Your Other Country Even Allows It
Before you weigh the tradeoffs at all, confirm the other country permits dual citizenship. Roughly 39 countries prohibit it, including China, India, Japan, Singapore, Saudi Arabia, and Indonesia. Some require proof that you’ve renounced all other citizenships before granting naturalization. Others will automatically revoke your citizenship if you voluntarily acquire another. India offers an alternative called Overseas Citizenship of India (OCI), which gives former citizens limited privileges without full citizenship. Japan generally requires citizens who hold another nationality to choose one by age 22. Violating these rules can mean losing a citizenship without warning, so verify the law of the other country before assuming you can hold both.
If the Tradeoffs Stop Working: Renunciation
Some dual citizens eventually decide the U.S. filing burden isn’t worth the passport, particularly those with no plan to live or work in the United States. Renunciation is formal and essentially irreversible. It requires appearing before a U.S. consular officer abroad and signing an oath of renunciation.
As of April 13, 2026, the State Department fee for processing a Certificate of Loss of Nationality dropped from $2,350 to $450.10Federal Register. Schedule of Fees for Consular Services – Fee for Administrative Processing of Request for Certificate of Loss of Nationality of the United States Anyone who renounces must also file IRS Form 8854 for the year of expatriation.11Internal Revenue Service. About Form 8854, Initial and Annual Expatriation Statement
For wealthier individuals, the real financial hit is the exit tax under IRC 877A. You’re classified as a “covered expatriate” if you meet any one of three tests: a net worth of $2 million or more on the date of expatriation, an average annual net income tax liability above a threshold that adjusts for inflation ($206,000 for 2025), or a failure to certify five years of tax compliance.12Internal Revenue Service. Expatriation Tax Covered expatriates are treated as though they sold all their worldwide assets at fair market value the day before expatriation, with the resulting gain taxable and reduced by an exclusion amount ($890,000 for 2025).13Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation For dual citizens with significant assets, the bill can reach hundreds of thousands of dollars, so anyone considering renunciation should talk to a tax professional well before starting the process.