Dual Citizenship for Americans: The Most Common Paths
May 22, 2026
A clear overview of how Americans qualify for dual citizenship in 2026: descent, residency-based naturalization, marriage, and investment, with the tradeoffs of each.
The United States allows dual citizenship, and so do most of the countries Americans tend to have ties to. That means holding a second passport is rarely a legal obstacle course; it’s a question of which door you actually qualify to walk through. For most Americans, that comes down to one of four paths: descent from a foreign-born ancestor, naturalization through residency, marriage to a foreign national, or, for a small number of programs, investment. Each has a different timeline, a different cost, and a very different bar for who can use it.
Below is an overview of how each path works, what it actually requires, and where the tradeoffs are, so you can figure out which one (if any) applies to your situation.
The four main paths, at a glance
| Path | Typical basis | Rough timeline | Who it fits |
|---|---|---|---|
| Descent (jus sanguinis) | A parent or grandparent born in, or a citizen of, another country | Months to a couple of years, mostly paperwork | Americans with documented foreign ancestry within the eligible generations |
| Naturalization by residency | Living in a country for a set number of years, usually with a visa | Several years to a decade or more | People willing to relocate, retire abroad, or already living overseas |
| Marriage | Marriage to a citizen of another country | 1 to 5+ years depending on the country | Spouses of foreign nationals |
| Investment (residency or citizenship by investment) | A qualifying financial contribution, real estate purchase, or business investment | Months (citizenship by investment) to several years (residency by investment, then naturalization) | Those with significant capital and no ancestral or marital tie |
Descent and marriage don’t require you to move anywhere while the process is underway; residency-based naturalization and most investment-residency routes do.
Citizenship by descent
Descent is the fastest and least expensive path for the Americans who qualify for it, because it isn’t really an application for a new status; it’s a request to have a status you already legally hold formally recognized. The catch is that “who qualifies” varies enormously by country, and the rules have been tightening in several major programs.
Italy has long been one of the most generous descent countries, since it historically didn’t cap how many generations back an Italian-born ancestor could be. That changed with 2025’s Tajani law, which restricted eligibility going forward to people with a parent or grandparent who was an Italian citizen, and tightened the “exclusively Italian ancestry” requirements along the way. Anyone tracing an Italian line further back than that, or through an ancestor who naturalized elsewhere before passing citizenship down, needs to check the current rule closely rather than assume older guidance still applies.
Ireland remains comparatively generous: Irish citizenship by descent generally extends to people with an Irish-born parent or an Irish-born grandparent, and in some cases further back if a prior generation registered in the Foreign Births Register.
Canada is a useful example of how these rules move in both directions. A previous “first-generation limit” had cut off citizenship by descent for children born abroad to a Canadian parent who was also born abroad. Bill C-3 restored eligibility for many people affected by that limit, so Americans with a Canadian parent or grandparent who assumed they were locked out may want to revisit their case.
Other countries with workable descent rules for Americans include Poland, Hungary, Germany, and several Latin American countries with jus sanguinis provisions, each with its own generational cutoffs and documentation demands (birth and marriage certificates, sometimes going back multiple generations, often requiring apostilles and certified translations). The paperwork burden is real, but it’s a research and administration problem, not a legal long shot, once you know your ancestry actually clears the bar.
Naturalization through residency
This is the path most people picture when they think of “becoming a citizen” the traditional way: move to a country, hold a qualifying visa or residency permit, live there for a set number of years, and apply. Requirements typically include language proficiency, a clean legal record, proof of ties to the country (employment, property, family), and sometimes a formal renunciation of prior citizenship, depending on the destination.
The appeal is that it’s open to almost anyone willing to commit the time, with no ancestry or marriage required. The tradeoff is the timeline: residency-based naturalization commonly takes years, often five to ten, and requires you to actually live in the country for most of that period, which rules it out for anyone who wants a second passport without relocating.
Citizenship through marriage
Marrying a citizen of another country can shorten the residency requirement considerably, sometimes to a year or two, though almost no country grants citizenship automatically upon marriage. Most still require some period of residency (or a marriage registered abroad plus a formal application), an interview or documentation proving the marriage is genuine, and, in many cases, basic language or integration requirements.
This path only exists for people who are already married, or planning to marry, a foreign national; it isn’t something to pursue as a strategy on its own. But for those it applies to, it’s often the fastest non-ancestry route to a second passport.
Citizenship and residency by investment
Investment programs let people obtain residency, and in a shrinking number of cases citizenship, through a qualifying financial contribution, real estate purchase, or business investment, rather than years of physical residency or a family tie. These programs have gone through significant contraction in the last few years: Malta’s citizenship-by-investment program was shut down in 2025 after sustained EU pressure, and Spain closed its Golden Visa (residency by investment) program in April 2025. Other European residency-by-investment programs remain active but have faced tightening scrutiny, and terms change frequently, so any figures or program details need to be verified against the current, official rules before you plan around them.
Investment is generally the most expensive path by a wide margin and the one most exposed to sudden policy change, which is exactly what happened to applicants mid-process in Malta and Spain. It’s worth considering only after confirming a program is currently open and understanding that today’s terms may not hold for long.
Weighing the tradeoffs
- Descent is the cheapest and fastest path when you qualify, but “when you qualify” is doing a lot of work in that sentence; the rules are specific and have recently gotten stricter in some countries and more generous in others.
- Residency-based naturalization is open to nearly anyone but demands years of actually living abroad.
- Marriage can be fast, but it only applies if you’re already married or engaged to a foreign national.
- Investment is open to those with capital but carries real policy risk and, in most surviving programs, still requires patience.
For most Americans exploring a second passport, the honest first question isn’t “which program is best,” it’s “do I already qualify for one of these without realizing it,” usually through a parent’s or grandparent’s birthplace. That’s the piece that’s easy to overlook and free to check.
Take the Second Pass eligibility quiz
Informational only, not legal or tax advice.