How to become a dual citizen: Your complete roadmap (2026)
Dual citizenship gives you the legal right to live, work, and travel freely across two countries. Whether you want a stronger passport, lower taxes, or a retirement haven, the path to a second citizenship depends on which country you choose and how much you can invest. This guide breaks down every realistic route available in 2026, from Caribbean fast-tracks to European long-term residency pathways.
The key insight most advisors miss: citizenship by investment is not the only option. Naturalisation through residency, descent, and marriage all remain viable depending on your background and timeline. The right strategy matches your budget, patience, and end goal.
Understanding dual citizenship: What it actually means
Dual citizenship means you hold full legal nationality in two separate countries simultaneously. You carry two passports, owe allegiance to both nations, and can exercise the rights of a citizen in each, including voting, owning property without restrictions, and accessing public services.
Not every country allows dual citizenship. Some require you to renounce your original nationality before naturalising. Before pursuing a second passport, confirm that both your current country and your target country permit dual status.
The practical advantages are significant. A second passport can unlock visa-free travel to dozens of additional countries, provide a political insurance policy, open banking and business opportunities in new jurisdictions, and give your children options they would not otherwise have. For high-net-worth individuals, dual citizenship also enables legitimate tax planning when structured with proper legal advice.
There are obligations too. Dual citizens may owe taxes in both countries (particularly US citizens, who face worldwide taxation regardless of residence). You may also face military service requirements or restrictions on holding certain government positions. Always consult a qualified immigration attorney before committing to a specific route.
The four paths to a second citizenship
Every second citizenship falls into one of four categories. Understanding which path fits your situation saves years of wasted effort and avoids programmes that do not match your profile.
1. Citizenship by investment (CBI)
The fastest route. You make a qualifying economic contribution, typically a donation to a national fund or a real estate purchase, and receive citizenship within months. Caribbean nations dominate this category. Dominica starts at USD 200,000, Grenada at USD 235,000, Antigua at USD 230,000, St Kitts at USD 250,000, and St Lucia at USD 240,000. Processing times range from approximately 90 days (St Lucia) to 6-9 months (Dominica) depending on the programme.
2. Residency then naturalisation
You obtain a residence permit first, live in the country for a qualifying period, then apply for citizenship through naturalisation. Portugal requires five years of residency. Greece requires seven years. Cyprus requires eight years. Italy requires ten years. This path demands patience but is generally far cheaper than CBI.
3. Citizenship by descent
If your parents or grandparents held citizenship in countries like Italy, Ireland, Poland, or Hungary, you may already qualify. This route costs only legal and administrative fees. Many people overlook it entirely.
4. Citizenship by marriage
Marrying a citizen of another country often shortens the residency requirement for naturalisation. The timeline and conditions vary widely by jurisdiction.
| Path | Typical cost | Timeline | Best for |
|---|---|---|---|
| CBI (Caribbean) | USD 200K-250K | ~90 days to 6-9 months | Speed, visa-free travel |
| Residency + naturalisation (Europe) | EUR 250K-800K+ | 5-10 years | EU passport, long-term planning |
| Descent | Legal fees only | 6-24 months | Those with qualifying ancestry |
| Marriage | Minimal | 1-5 years | Spouses of foreign nationals |
How to become a citizen of St Kitts and Nevis
St Kitts and Nevis operates the oldest citizenship by investment programme in the world, established in 1984. The minimum investment is USD 250,000 as a contribution to the Sustainable Island State Contribution fund. Real estate options are also available at higher thresholds.
The application process is straightforward. You submit your application through an authorised agent, undergo due diligence checks, and receive approval typically within four to six months. The St Kitts passport provides visa-free or visa-on-arrival access to a strong roster of destinations, making it a popular choice for business travellers who need mobility quickly.
There is no requirement to live in St Kitts. You do not need to visit before, during, or after the application process. This makes it one of the most accessible CBI programmes for busy professionals and entrepreneurs who need a second passport without disrupting their lives.
Family members can be included in a single application, covering spouses, dependent children, and in many cases parents and siblings. The programme has undergone several reforms in recent years to strengthen due diligence and maintain its international reputation.
How to become a citizen of Grenada
Grenada's CBI programme stands apart for one critical reason: Grenada holds an E-2 treaty with the United States. This means Grenadian citizens can apply for the US E-2 investor visa, which allows you to live and work in the United States by investing in a US-based business. No other Caribbean CBI nation offers this pathway.
The minimum investment is USD 235,000 through the National Transformation Fund. Real estate options require a higher commitment but allow you to purchase approved property that may generate rental income.
Processing takes approximately six months. Like St Kitts, there is no physical residency requirement. Grenada's passport provides strong visa-free travel access, and the E-2 treaty benefit makes it the top choice for investors who want eventual access to the US market without the lengthy EB-5 process.
If your primary goal is US access combined with a Caribbean passport, Grenada is the programme to prioritise. The E-2 visa is renewable indefinitely as long as your US business remains operational, creating a de facto long-term US residency solution through a Caribbean investment.
How to become a dual citizen of Portugal
Portugal offers one of Europe's most attractive paths to citizenship through its Golden Visa residency programme, though the rules changed significantly in October 2023 when real estate was removed as a qualifying investment category. The current minimum investment is EUR 500,000 through qualifying funds.
The Portuguese Golden Visa grants residency, not immediate citizenship. You must hold residency for five years and demonstrate basic Portuguese language skills before applying for naturalisation. Processing for the initial Golden Visa currently takes 12-18 months. Once you become a Portuguese citizen, you gain full EU citizenship, meaning the right to live and work anywhere in the European Union.
Portugal's physical presence requirement is minimal: just seven days in the first year and fourteen days in each subsequent two-year period. This makes it one of the most flexible European residency programmes for people who do not plan to relocate full-time.
The Portuguese passport provides visa-free access to approximately 185 countries. Combined with the low physical presence requirement and the path to full EU citizenship, Portugal remains a top-tier option despite the removal of real estate investment. Be aware that the citizenship timeline may extend to ten years under proposed legislative changes, so acting sooner rather than later is advisable.
Portugal also replaced its Non-Habitual Resident (NHR) tax regime with the new IFICI programme, which offers preferential tax treatment for qualifying new residents. This can provide significant tax advantages during your residency period.
Retiring in Italy as a dual citizen
Italy offers citizenship through both investment and descent, making it a dual-pathway destination. For those without Italian ancestry, the investment route requires EUR 250,000 in a qualifying startup, EUR 500,000 in an Italian company, or EUR 2,000,000 in government bonds. Processing takes three to four months for the initial residency permit.
The catch is timeline: Italian citizenship through naturalisation requires ten years of legal residency. This is among the longest waiting periods in Europe. However, if you qualify through Italian descent (jure sanguinis), you can bypass this entirely and claim citizenship based on your family lineage, often within twelve to twenty-four months of filing.
For retirees, Italy offers an appealing lifestyle at a lower cost than many Western European countries, particularly in the south. The Italian Elective Residency Visa allows non-EU retirees with sufficient passive income to live in Italy without working. Combined with a descent-based citizenship claim, this creates a pathway where you can retire in Italy while your citizenship application processes.
Italy's passport provides visa-free access to approximately 185 countries and full EU freedom of movement. The ten-year naturalisation timeline means this is a long-term play, but for those with patience or Italian heritage, the payoff is one of the world's strongest passports and access to the entire European Union.
Caribbean CBI programmes compared: Which is right for you?
The five major Caribbean CBI programmes each serve slightly different investor profiles. Choosing the right one depends on your budget, your need for US access, and how many family members you want to include.
| Country | Minimum investment | Key advantage | Processing |
|---|---|---|---|
| Dominica | USD 200,000 | Lowest cost | 6-9 months |
| Grenada | USD 235,000 | US E-2 treaty access | ~6 months |
| Antigua & Barbuda | USD 230,000 | Family-friendly inclusions | ~6 months |
| St Lucia | USD 240,000 | Government bond option | ~90 days |
| St Kitts & Nevis | USD 250,000 | Oldest, most established | 4-6 months |
If budget is the primary concern, Dominica at USD 200,000 is the most affordable option. If US market access matters, Grenada's E-2 treaty makes it the clear winner despite the slightly higher price. St Kitts offers the longest track record and strongest brand recognition, which can matter when dealing with banks and compliance departments that scrutinize CBI passports.
All five programmes allow inclusion of spouses and dependent children. Most also permit parents and, in some cases, siblings to join the application. None require physical residency before or after approval.
European citizenship through Golden Visa residency
European Golden Visa programmes do not grant immediate citizenship, but they open a structured path to naturalisation that ends with one of the world's most powerful passport categories: an EU passport. The three most active European programmes in 2026 are Greece, Portugal, and Cyprus.
Greece requires real estate investment with tiered minimums: EUR 800,000 in premium zones, EUR 400,000 in secondary zones, and EUR 250,000 in designated areas. Processing takes approximately three months. Citizenship is available after seven years of residency. The Greek passport offers visa-free access to 185 countries.
Portugal requires EUR 500,000 in qualifying funds (real estate removed in 2023). Processing takes 12-18 months. Citizenship is available after five years with minimal physical presence. The Portuguese passport offers approximately 185 visa-free destinations.
Cyprus offers permanent residency through a EUR 300,000 investment. Processing takes approximately six months. Citizenship requires eight years of residency. The Cypriot passport provides visa-free access to 174 countries.
The key difference between European and Caribbean programmes is time versus cost. Caribbean CBI delivers a passport in months but does not provide EU rights. European residency costs more in time but delivers access to the entire European Union, arguably the most valuable citizenship benefit available globally.
How to become a Cyprus citizen
Cyprus offers a permanent residency programme with a EUR 300,000 minimum investment, primarily in real estate. This is one of the more affordable entry points for European residency. Processing takes approximately six months, and the permit is valid for life.
Citizenship through naturalisation requires eight years of legal residency in Cyprus. During this period, you must demonstrate ties to the country and meet language and integration requirements. The Cypriot passport provides visa-free access to 174 countries, and as an EU member state, citizenship grants full freedom of movement throughout the European Union.
It is critical to note that Malta's citizenship by investment programme (MEIN) was suspended in April 2025. Cyprus never replaced its former citizenship-by-investment scheme after it was shut down, so the residency-then-naturalisation route is the only viable path. There are no shortcuts to Cypriot citizenship through investment alone.
For investors who value proximity to the Middle East and a favourable corporate tax environment, Cyprus offers strategic advantages beyond just the passport. The island's position makes it a natural hub for business between Europe, the Gulf states, and North Africa.
What is required to become a French citizen
France does not offer a citizenship by investment programme. The standard path to French citizenship is through naturalisation after five years of legal residency, demonstrated French language proficiency (typically B1 level), and proof of integration into French society.
To start the clock, you need a valid French residence permit. Common options include the Talent Passport for skilled workers and entrepreneurs, the Visitor Visa for those with independent means, or family reunification visas. France does not have a Golden Visa programme comparable to Portugal or Greece.
The French passport is one of the strongest in the world, providing visa-free access to approximately 190 countries and full EU citizenship rights. The five-year timeline is competitive with Portugal, though France requires genuine physical presence throughout, making it less suitable for investors who want to maintain their primary residence elsewhere.
Marriage to a French citizen allows you to apply for citizenship after four years of marriage, provided you demonstrate language proficiency and community of life. This is one of the shorter marriage-based timelines in Europe.
The EB-5 route: US citizenship through investment
The United States EB-5 programme grants a Green Card (permanent residency) through a qualifying investment. The minimum is USD 800,000 in a Targeted Employment Area (TEA) or USD 1,050,000 for standard investments. Each investment must create at least ten full-time jobs for US workers.
Processing times vary significantly: rural TEA projects receive priority processing and can complete in as little as five to eighteen months, while urban projects may take considerably longer. After receiving your Green Card, you must wait five years before applying for US citizenship through naturalisation.
The EB-5 path is the only direct investment route to US residency and eventual citizenship. The UK eliminated its investor visa in 2022, making the US one of the few major English-speaking countries where you can invest your way to permanent residency. For those who want both US access and speed, combining Grenada's CBI (for the E-2 visa) with an eventual EB-5 application provides the most flexible strategy.
Ready to start your dual citizenship journey?
Every situation is unique. The right programme depends on your nationality, budget, timeline, and long-term goals. Our advisors specialise in matching investors with the programme that delivers the strongest outcome for their specific circumstances.
Frequently asked questions
How much does it cost to become a dual citizen?
Costs range from legal fees only (citizenship by descent) to USD 200,000-250,000 for Caribbean CBI programmes, and EUR 250,000-800,000+ for European Golden Visa residency routes. The cheapest CBI option is Dominica at USD 200,000. European programmes require additional years of residency before citizenship is granted.
What is the fastest way to get a second passport?
Caribbean citizenship by investment is the fastest route. St Lucia processes in approximately 90 days, St Kitts in 4-6 months, Grenada and Antigua in approximately 6 months, and Dominica in 6-9 months. If you qualify for citizenship by descent in countries like Italy or Ireland, this can also be relatively fast once documentation is assembled.
Can I become a dual citizen without living in the other country?
Yes. All Caribbean CBI programmes have zero physical residency requirements. Portugal's Golden Visa requires only seven days in the first year and fourteen days in each subsequent two-year period. Citizenship by descent also typically requires no relocation, though you may need to visit for document processing.
How to become a Cyprus citizen through investment?
Cyprus offers permanent residency through a EUR 300,000 investment, primarily in real estate, with processing in approximately six months. Citizenship requires eight years of legal residency and naturalisation. There is no direct citizenship by investment programme in Cyprus as of 2026.
Does the US allow dual citizenship?
Yes. The United States does not require you to renounce other citizenships. However, US citizens are taxed on worldwide income regardless of where they live, which creates additional tax planning considerations when holding dual citizenship. Always work with a cross-border tax advisor.
Which Caribbean CBI programme gives access to the United States?
Grenada is the only Caribbean CBI country with an E-2 treaty with the United States. Grenadian citizens can apply for the E-2 investor visa, which permits living and working in the US by investing in a US-based business. The minimum CBI investment for Grenada is USD 235,000.
This article is for informational purposes only and does not constitute legal, tax, or immigration advice. Programme requirements, costs, and timelines are subject to change. Always consult qualified legal and financial professionals before making investment or immigration decisions. Golden Keys Global is not a law firm. Information is accurate as of March 2026.