- Approximately 40 nations currently impose full bans or strict restrictions on dual citizenship status.
- Major Asian economies like China, India, and Japan maintain the world’s most rigid single-citizenship policies.
- Global trends indicate a shift toward stricter screening and longer residency requirements through 2026.
Dual citizenship remains legal in most of the world, but a long list of countries still draw a hard line. Roughly 40 nations now impose full bans or conditional restrictions, forcing many applicants to renounce a prior passport before they naturalize.
For immigrants, investors, and diaspora families, that rule changes everything: family ties, tax exposure, military duties, and the right to move freely across borders.
The broad picture is clear. About 76% of countries permit dual citizenship, but the rest keep tighter rules because they want one clear national allegiance, cleaner tax enforcement, and fewer diplomatic conflicts. According to analysis by VisaVerge.com, the trend is moving toward stricter citizenship screening in 2025 and 2026, not looser rules.
Where the strictest rules still apply
Asia carries the heaviest restrictions. China does not recognize dual citizenship, and foreign citizenship triggers automatic loss. India also keeps a full ban, but it offers the Overseas Citizen of India, or OCI, card instead. That card gives lifetime entry, work rights, and access to some services, but not voting or government jobs.
Japan requires adults to renounce one nationality, while birth duals must choose by age 22. Singapore, Indonesia, and Malaysia also require single citizenship for adults. North Korea treats foreign citizenship as meaningless for its nationals.
Other Asian states on the restricted list include Myanmar, Laos, Nepal, Bhutan, Kazakhstan, Uzbekistan, Azerbaijan, Kyrgyzstan, Tajikistan, Turkmenistan, and Thailand. In many of these countries, dual citizenship is not just discouraged. It is barred outright for adults who naturalize.
The Middle East shows a mix of hard bans and narrow openings. Saudi Arabia still bans dual citizenship, but royal decrees under Vision 2030 allow exceptions for scientists and investors. The United Arab Emirates moved in 2021 to allow exceptions for selected professionals, including people in technology and sports.
Kuwait, Qatar, Oman, Iran, Bahrain, and Yemen keep full bans in ordinary cases.
Europe has a smaller set of strict holdouts. Andorra, Monaco, and San Marino use full bans to protect tiny populations and, in Andorra’s case, preserve its tax and residency model. Estonia also strips foreign citizenship on naturalization. Slovakia and Ukraine require renunciation, and Belarus remains restrictive as well.
In Africa, Ethiopia and Eritrea keep bans despite large diasporas. Eritrea also taxes citizens worldwide. Botswana, Cameroon, Libya, Mauritania, Guinea, Togo, Congo, Eswatini, Zimbabwe, Equatorial Guinea, and Senegal also appear on the restricted side.
The Americas and Pacific list is shorter but still firm. Cuba and Suriname keep full bans. The Bahamas requires a choice by age 21. Nicaragua moved in 2025 toward a ban. In the Pacific, the Marshall Islands, Micronesia, Papua New Guinea, the Solomon Islands, and Tonga restrict dual status.
When conditional restrictions still leave a door open
Some countries do not allow dual citizenship as a general rule, but they build in exceptions. Austria requires renunciation for naturalization after a 10-year residency period, yet it allows dual status by birth, parentage, or rare merit cases for people with exceptional contributions.
The Netherlands usually demands renunciation too, but makes exceptions for marriage or partnership with a Dutch citizen, minors who gain citizenship through a parent, asylum cases, and situations where renunciation is impossible.
Liechtenstein keeps a ban for naturalization, but not always for people born with dual ties or those linked by marriage. Spain is more flexible for people from Latin America, Andorra, Portugal, the Philippines, and Equatorial Guinea. Lithuania discourages dual status after age 21, but it permits it for people born with it and for some pre-1990 exiles.
Tanzania shows how uneven these rules can be, with older marriage-based exceptions that leave many applicants in doubt.
These are conditional restrictions, not open permission. The paperwork matters, and the burden falls on the applicant to prove an exception. In practice, that means birth records, marriage certificates, prior residence documents, or proof that renunciation is impossible.
How renunciation works in practice
Renunciation is not a casual letter. It is a formal legal step that usually requires an oath, identity documents, and fees. The United States charges $2,350 for a citizenship renunciation appointment, and the process runs through the U.S. Department of State’s renunciation guidance.
Some countries, like China, revoke citizenship automatically once another nationality is acquired. Others, like India, issue OCI status after renunciation.
For many applicants, the hardest part is timing. A person may need to prove loss of prior citizenship before a new passport is issued. In places with strict rules, that can delay a move for months or years. It also raises the risk of statelessness if one country ends citizenship before the other grants it.
Applicants should expect three practical stages. First comes a review of the old nationality law. Second comes any required renunciation or proof of exception. Third comes the new citizenship oath, often with extra checks on residence, tax compliance, or military service.
Authorities in strict countries often ask for extra proof that the applicant has complied with every step before final approval.
Why the trend is tightening now
Recent policy moves show a global shift toward more control, not less. France has moved to civic exams from January 1, 2026. Portugal doubled its residency period to 10 years in June 2025. Italy narrowed descent claims in March 2025. Poland is moving toward an 8-year residency rule.
These changes do not all ban dual citizenship, but they make naturalization harder.
The political logic is familiar. Governments want one loyal citizen, one tax file, and one military obligation. That message appeals to nationalist voters and to states worried about security or labor competition. Smaller countries fear cultural dilution. Large states worry about strategic loyalty.
For applicants, that means planning matters. A person with family ties in Spain, Latin America, or Portugal may have a path that stays open. Someone seeking naturalization in China, India, Japan, or the Gulf faces a far stricter road.
Investors also need to watch citizenship-by-investment programs, because a program that looks attractive on paper can still clash with a home country’s rules.
The role of the United States in the broader debate
The United States still permits dual citizenship, but the debate is active. President Trump’s 2025 policies, including the Gold Card and birthright curbs, fit a broader push toward tighter citizenship rules.
A proposed Exclusive Citizenship Act, also known as the Moreno bill, would force U.S. citizens with multiple nationalities to choose within a year by 2027. That would affect millions, including high-profile dual nationals.
For now, the key lesson is simple: dual citizenship is still common, but it is not universal, and the rules are getting harder to predict. Any move toward naturalization should start with the citizenship law of the country that issued the first passport, because that law often decides whether the second passport is possible at all.
