Second Citizenship for Americans: The Main Routes
A second citizenship is the most powerful part of a Plan B. It gives you the permanent right to live in another country, a second passport to travel on, and options for your children and future generations. This guide explains the four main routes available to Americans, what each realistically costs and how long it takes, and how to find out whether you may already qualify.
Global Vaults provides general information only, not legal, tax, or immigration advice. Citizenship rules change often, so confirm current requirements with the relevant government or a qualified professional before acting.
What a second passport does, and doesn't, change
The US allows its citizens to hold another citizenship, so in most cases you can add a second passport without giving up your American one. Some other countries, however, require you to give up existing citizenships when you naturalize with them, so check the rules of the country you're considering.
What a second citizenship does give you:
The right to live there, permanently, without visas or permits. Citizenship in a European Union country generally lets you live and work anywhere in the EU.
A second passport, useful if your US passport is lost, delayed, or less welcome somewhere, and for traveling to places that are easier to enter on another passport.
Something to pass on. In many countries, your children can inherit citizenship from you, sometimes only if you register them early.
What it doesn't change:
US taxes. The US taxes its citizens on worldwide income wherever they live, so you keep filing US returns as long as you're a US citizen.
How you enter the US. US citizens are required to use their US passport to enter and leave the United States.
Obligations elsewhere. As a citizen, you may take on the other country's obligations too, which in a few countries can include military service or local taxes if you live there. And while you're in that country, it will generally treat you as its own citizen, which can limit help from US consular officials.
Citizenship by descent
For many Americans, the cheapest and fastest route is one they may already have: citizenship through a parent or grandparent. Many countries treat the descendants of their citizens as citizens too, often from birth. You don't apply to become a citizen so much as ask the country to recognize that you already are.
Ireland is one of the most accessible. If a parent was born on the island of Ireland, you're generally an Irish citizen automatically and can apply directly for a passport. If a grandparent was born there, you can claim citizenship by registering on Ireland's Foreign Births Register. Processing has recently taken around nine to ten months once all documents are received, and the adult application fee is a few hundred euros. Claims through a great-grandparent are possible only in limited cases, where your parent registered before you were born.
Italy was long the most popular descent route, with no limit on generations. That changed in 2025. A new law generally limits automatic citizenship to people with a parent or grandparent born in Italy, and adds conditions about that ancestor's citizenship. Italy's Constitutional Court upheld the change in 2026, but some legal challenges remain open, so anyone with Italian ancestry should check the current rules carefully, ideally with a specialist.
Canada may now be the most important descent route for Americans. Until recently, Canadian citizenship generally passed down only one generation born abroad. A new law that took effect on December 15, 2025 removed that limit for people born before that date. As a result, many Americans with a Canadian parent, grandparent, or even earlier ancestor may already be Canadian citizens without knowing it, as long as they can document an unbroken line of descent. You confirm your status by applying to the Canadian government for a citizenship certificate, and processing can take a year or more. For children born after December 15, 2025, new rules apply: the Canadian parent generally must have spent at least 1,095 days in Canada for citizenship to pass on.
Other countries with descent routes include Poland, Germany, Hungary, Greece, Lithuania, and others. Each has its own rules about how many generations back you can go, which dates matter, and whether a family member lost citizenship along the way, for example by naturalizing in the US. Some routes, such as Hungary's, also require some knowledge of the language.
Descent claims rest on documents: birth, marriage, death, and naturalization records for each generation, often with official translations and apostilles. Gathering them is usually the slowest part, so it's worth starting early.
Naturalization and marriage
Naturalization is the standard route for people without ancestry: you become a legal resident of a country, live there for a required period, and then apply for citizenship. Requirements vary widely, but commonly include:
Years of legal residence, often five to ten, sometimes with rules on how many days a year you must actually spend in the country.
Language and civics tests, showing basic knowledge of the language, history, and system of government.
A clean record and proof of income, plus evidence that you've integrated, such as paying local taxes.
Because it starts with residency, naturalization is a long-term project rather than a quick fix. But a residency permit is valuable on its own as a Plan B, since it gives you the right to live in another country well before you qualify for citizenship. Some residencies require very little time in the country to keep, though those usually don't count toward citizenship in the same way. Check whether time spent abroad pauses or resets the clock.
Marriage to a citizen of another country can open a faster route in many places. It usually still requires several years of marriage, often combined with a period of residence, and sometimes a language test. Authorities typically look closely at whether a marriage is genuine.
Citizenship by investment
A handful of countries grant citizenship in exchange for a qualifying investment or contribution. The best-known programs are in five Caribbean nations: Antigua and Barbuda, Dominica, Grenada, St. Kitts and Nevis, and St. Lucia.
Cost. After the five countries agreed on a common price floor in 2024, minimum contributions start at about $200,000 for a single applicant and range up to about $250,000, depending on the country. Government fees, due diligence fees, and agent fees come on top, and real estate routes usually cost more.
Timeline. Typically a few months to under a year from application to passport.
Requirements are tightening. Programs have added mandatory interviews and fingerprinting, and some now require a short period of physical presence in the country over the first several years. The US and EU have pressed these countries to tighten vetting, which has also affected visa-free travel for some of their passports.
Agents are required. Applications generally must go through government-licensed agents, so choosing a reputable one matters.
A few European countries once offered citizenship by investment, but the EU has largely shut these programs down. Residence-by-investment programs, often called golden visas, are more common, and EU countries offering them include Portugal, Greece, Italy, Malta, Hungary, and Latvia. They give residency, not citizenship.
Countries reprice and change their rules often, so treat any figures as a starting point and confirm them before acting.
The routes compared
Route | Who it's for | Typical cost | Typical time | Main hurdle |
Descent | People with a qualifying parent or grandparent | Low: fees, records, translations | Months to a few years | Finding and certifying family records |
Naturalization | Anyone willing to live abroad | Moderate: residency costs | Often 5 to 10 years | Years of residence, language tests |
Marriage | Spouses of foreign citizens | Low to moderate | Several years | Proving a genuine marriage, often residence |
Investment | Those with significant capital | About $200,000 and up, plus fees | A few months to a year | Cost and due diligence |
For most families, the sensible order is to check descent first, since it costs little to find out. If that's not an option, a residency you can realistically keep is a strong first step, leading to naturalization over time. Citizenship by investment is the fastest route but also the most expensive, so it tends to suit people who need a second passport quickly and can afford the cost.
How to get started
Map your family tree. Write down where each parent, grandparent, and great-grandparent was born, and when any of them became US citizens. Older relatives are often the best source, so ask while you can.
Check each country's rules. For every foreign-born ancestor, look up that country's descent rules on its official government or consulate website.
Gather documents. Order certified birth, marriage, death, and naturalization records. US naturalization records can be requested from US Citizenship and Immigration Services, and foreign records from the relevant country. Expect to need translations and apostilles.
Get expert help for complex cases. Descent claims with breaks in the family line, name changes, or old records often benefit from a specialist firm or lawyer.
Think about your children. Many countries let you pass citizenship to your children only if you register them, sometimes before a certain age or before their own children are born. Building this into your plan protects future generations.
Keep your paperwork safe. Once you have citizenship documents, store certified copies securely, and keep records future generations will need.
If descent isn't an option, start by comparing residency programs you could realistically maintain, and how long each takes to lead to citizenship.
Global Vaults provides general information only, not legal, tax, or immigration advice. Last reviewed November 2026.