There are five established ways to get citizenship in another country: through ancestry, through long-term residency and naturalization, through marriage to a citizen, through a qualifying financial investment, or through a discretionary grant for exceptional merit. Which one fits you depends on your family tree, how long you’re willing to live abroad, how much you can spend, and whether your current country lets you hold two nationalities at once. For U.S. citizens, there’s a separate question waiting on the other side: the IRS keeps taxing you no matter where you live, and the reporting rules that come with a foreign bank account are strict.
Citizenship by Descent
Many countries let you claim citizenship through a parent, grandparent, or in some cases a great-grandparent, no matter where you were born. The legal principle is jus sanguinis, nationality passed down through bloodlines rather than geography. Countries across Europe, Latin America, and Asia offer descent-based programs, but the qualifying generations and paperwork requirements vary widely.
The core rule is an unbroken chain of citizenship from your qualifying ancestor to you. Your ancestor must still have been a citizen of the target country when their child (the next link in the chain) was born. If your grandparent naturalized as a U.S. citizen before your parent’s birth, many countries treat that as severing the line. Some countries also impose a cutoff date tied to the founding of the modern state, so ancestors born before that date may not qualify even if they lived on the same territory.
Older laws in many countries only let fathers transmit citizenship to children born abroad, which left gaps for anyone tracing their claim through a mother or grandmother. Several countries have reformed those rules or opened special application windows for descendants who were excluded. If your claim runs through a maternal line, check whether the country has addressed this before assuming you’re out.
The documentation is the hard part. You’ll need birth certificates, marriage records, and sometimes naturalization or non-naturalization records for every person in the chain. Many are decades old, in a foreign language, and stored in overseas archives. Regions with shifting borders or name changes add another layer.
Citizenship by Naturalization
Naturalization is the pathway most people picture. You move to a country, live there as a legal resident for a set number of years, and then apply for full citizenship. Most countries require somewhere between five and ten years of continuous residency.
U.S. naturalization law, as one example of the typical structure, requires at least five years of continuous residence after permanent residency is granted, with physical presence for at least half of that time. Absences matter more than most applicants expect. Leaving the U.S. for more than six continuous months during the qualifying period creates a presumption that you abandoned residency, and leaving for a year or more breaks continuity outright.1Office of the Law Revision Counsel. 8 USC 1427 – Requirements of Naturalization
Other countries follow similar patterns. Canada requires 1,095 days of physical presence over a five-year window. Many European countries require five to eight years of residency, and some reset the clock if you spend too much time abroad in any given year. Governments want proof you actually live there, not just that you hold a permit.
Language and Civics Testing
Nearly every country asks you to show basic ability in the national language and some familiarity with the country’s history or government. The U.S. tests English reading and writing along with civics. Germany requires a B1-level language certificate. France tests language proficiency and knowledge of French culture and values.
The U.S. exempts some older long-term residents. If you’re 50 or older and have held a green card for at least 20 years, or 55 or older with 15 years, you can skip the English test and take the civics exam in your native language with an interpreter. Applicants 65 or older with 20 years of residency get a simplified civics test.2U.S. Citizenship and Immigration Services. Exceptions and Accommodations Many other countries offer similar accommodations, with different thresholds.
Criminal History and Good Moral Character
A clean record is close to universal. Countries draw the line differently, but serious felony convictions will disqualify you almost everywhere. Some also scrutinize misdemeanors, unpaid tax debts, or missed child support. U.S. law requires “good moral character” throughout the qualifying residency period and up to admission, which gives adjudicators wide discretion to deny an application over conduct that isn’t a criminal conviction.
Citizenship Through Marriage
Marrying a citizen usually shortens the naturalization timeline rather than granting citizenship on its own. In the U.S., spouses of citizens can apply after three years of permanent residency instead of five, provided they’ve lived with their citizen spouse for those three years and have been physically present in the country for at least 18 months.3U.S. Citizenship and Immigration Services. Chapter 3 – Spouses of U.S. Citizens Residing in the United States Some European countries allow spousal applications after as little as one or two years of marriage combined with residency.
Immigration authorities investigate marriages closely. The U.S. treats marriage fraud as a federal crime carrying up to five years in prison and a fine of up to $250,000.4Office of the Law Revision Counsel. 8 US Code 1325 – Improper Entry by Alien Verification typically involves separate interviews of each spouse, requests for evidence of shared finances and cohabitation, and sometimes unannounced home visits. A finding of fraud results in denial, deportation, and a permanent bar in most jurisdictions.
Citizenship by Investment
Several countries sell a fast track to citizenship in exchange for a large financial contribution, skipping most or all of the residency requirements naturalization demands. The tradeoff is cost.
Caribbean nations run the best-known programs. Dominica requires a non-refundable $200,000 contribution to its Economic Diversification Fund, or a $200,000 investment in approved real estate. St. Kitts and Nevis sets its donation threshold at $250,000 and requires at least $325,000 for a real estate investment. Grenada’s donation minimum is $235,000, with real estate options starting at $270,000 for a shared investment. European programs generally cost more, with some requiring $1 million or above.
Every reputable program screens applicants heavily before approval, including international criminal database checks, sanctions screening, and verification that the funds come from legitimate sources. A rejected application usually means you lose processing fees but not the investment itself; the specifics depend on the program.
Citizenship for Exceptional Merit
Some countries grant citizenship on a discretionary basis to individuals whose talents or accomplishments would benefit the nation. This pathway sits outside the normal application process and typically requires a decision by a head of state or legislative body. Belgium, for example, reserves naturalization as a discretionary measure granted by its legislature for people who can show exceptional contributions in scientific, athletic, or cultural fields and who would enhance Belgium’s international standing.5Justice. You Have Exceptional Merit – Naturalisation
These grants are rare and unpredictable. They often bypass every standard requirement, including residency and language testing, because the government considers the applicant’s presence valuable enough to waive the usual criteria. Olympic athletes, Nobel laureates, and prominent artists are the archetypes, though countries also use this route for business leaders or technologists whose work aligns with national priorities. You can’t really apply in the traditional sense.
Documentation and Authentication
Whichever pathway you use, the paperwork is substantial. Expect certified copies of your birth certificate, a valid passport, and marriage certificates if applicable. Most countries also require a police clearance certificate from every country where you’ve lived for a significant period, proof of residency covering the qualifying period, and evidence of language proficiency or completed civics testing.
Documents issued in one country generally can’t be submitted raw to the government of another. If the target country is a member of the 1961 Hague Convention, your documents will need an apostille, a standardized authentication stamp that verifies the document is genuine.6Travel.State.Gov. Preparing Your Document for an Apostille Certificate In the U.S., federal documents receive apostilles from the State Department; state-issued documents like birth certificates are apostilled by the relevant Secretary of State. For countries outside the Hague Convention, you may need embassy legalization, which is more involved.
Nearly every country also requires certified translations of documents not already in the national language. Professional certified translations of standard documents like birth and marriage certificates typically run $20 to $60 per page. Names must match exactly across every document. A discrepancy between your birth certificate and your passport can cause delays or outright rejection, so if your name changed through marriage, court order, or any other process, bring the supporting documentation for every change.
The Application and Approval Process
Once your documents are assembled, translated, and authenticated, the application itself follows a predictable sequence in most countries: submit forms and fees, provide biometric data, attend an interview, and wait. Many countries accept initial filings through digital portals; some still require an in-person appointment at a consulate or immigration office.
Filing fees vary and are typically non-refundable regardless of the outcome.7U.S. Citizenship and Immigration Services. Filing Fees The U.S. naturalization application costs $710 online or $760 on paper, with reduced fees for lower-income applicants. Other countries range from a few hundred dollars to over $2,000. Budget separately for legal help, which typically runs $1,000 to $2,500 on top of government fees.
Processing times are the part nobody likes. Six months is optimistic in most countries; one to three years is common. Some nations are transparent about their timelines, others aren’t. During the wait you may be called in for an interview where an officer verifies application details and assesses your language ability in person.
The final step in most countries is an oath or pledge, administered at a formal ceremony. In the U.S., the oath involves pledging loyalty to the Constitution and renouncing allegiance to foreign governments.8U.S. Citizenship and Immigration Services. Chapter 2 – The Oath of Allegiance After the ceremony you receive a certificate of naturalization, which becomes your proof of citizenship and the document you’ll use to apply for a passport.
Countries That Prohibit Dual Citizenship
Not every country lets you hold two citizenships at once. Dozens, including China, India, Japan, Singapore, and Saudi Arabia, require you to give up your existing citizenship when you naturalize. India offers a workaround called Overseas Citizenship of India, which provides some residency and travel benefits without full citizenship rights, but the core rule stands: you can’t be an Indian citizen and something else at the same time.
The consequence is serious and sometimes irreversible. If you naturalize in a country that prohibits dual nationality, you may be required to renounce your original citizenship as a condition of the process, and some countries want proof of renunciation before they finalize your new status. Before applying anywhere, confirm both that your target country allows dual nationality and that your current country wouldn’t revoke your citizenship if you voluntarily naturalized elsewhere.
U.S. Tax and Reporting Obligations for Dual Citizens
The United States is one of the few countries that taxes its citizens on worldwide income regardless of where they live. If you’re a U.S. citizen who gains a second nationality and moves abroad, the IRS still expects you to file every year and report all income earned anywhere in the world.9Internal Revenue Service. Frequently Asked Questions About International Individual Tax Matters This continues until you renounce U.S. citizenship or die. Most other countries only tax residents, so new dual citizens are often blindsided.
The foreign earned income exclusion softens the blow. For 2026, U.S. citizens living and working abroad can exclude up to $132,900 in foreign earned income from U.S. taxable income if they meet either the physical presence test or the bona fide residence test.10Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Foreign tax credits can also offset U.S. liability on income already taxed by your new home country. Passive income like investment gains, rental income, and retirement distributions often can’t be excluded, so the picture gets complicated fast.
FBAR and FATCA Reporting
Beyond income taxes, U.S. citizens with foreign bank accounts face two separate reporting requirements with severe penalties for missing them. The first is the FBAR (FinCEN Form 114), required if the combined value of all your foreign financial accounts exceeds $10,000 at any point during the year. It’s due April 15 with an automatic extension to October 15, and it’s filed electronically through FinCEN, not with your tax return.11Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
The second is Form 8938 under FATCA, which has higher thresholds. If you live in the U.S., you file when foreign assets exceed $50,000 at year-end (or $75,000 at any point during the year) for single filers. Living abroad raises the thresholds significantly: $200,000 at year-end or $300,000 at any point for single filers, and double for joint filers.11Internal Revenue Service. Comparison of Form 8938 and FBAR Requirements
Penalties are where people get hurt. A non-willful FBAR violation can cost up to $10,000 per form. Willful violations jump to the greater of $100,000 or 50% of the account balance.12Office of the Law Revision Counsel. 31 USC 5321 – Civil Penalties These apply per year of noncompliance, so someone who didn’t know about the requirement and missed several years of filings can face six-figure liability with no intent to evade taxes.
Renouncing U.S. Citizenship: Costs and Consequences
Some dual citizens eventually renounce their U.S. citizenship to escape the lifelong filing burden. The process is more expensive and consequential than most people expect. The State Department charges $2,350 to process the renunciation, one of the highest such fees in the world.
The financial exit isn’t just an administrative fee. Under the expatriation tax rules, you qualify as a “covered expatriate” subject to an exit tax if any of three conditions apply on your expatriation date: your net worth is $2 million or more, your average annual net income tax over the preceding five years exceeds a threshold ($206,000 for 2025, adjusted annually for inflation), or you fail to certify full tax compliance for the five years before expatriation.13Internal Revenue Service. Expatriation Tax Covered expatriates are treated as having sold all their worldwide assets at fair market value the day before expatriating, and any gain above an exclusion amount is taxed.
You’re also required to file Form 8854, the Initial and Annual Expatriation Statement, certifying your tax compliance and reporting your final tax position. Failing to file it, or filing it with incomplete or incorrect information, triggers a separate penalty of $10,000 per year.14Internal Revenue Service. 2025 Instructions for Form 8854 – Initial and Annual Expatriation Statement Between the renunciation fee, potential exit taxes, and the cost of professional advice to navigate the process, renouncing is rarely a casual decision. Get specialized legal and tax counsel well before scheduling an appointment at the consulate.