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15 Countries with the Most Difficult Paths to Citizenship in 2025
Qatar: A Lengthy and Demanding Process
Gaining citizenship in Qatar is an arduous journey that requires 25 years of continuous residency. Applicants must convert to Islam, speak Arabic fluently, and renounce their original citizenship upon approval. This strict process ensures limited foreign influence and maintains the country’s cultural integrity.
Vatican City: Exclusive Access for Religious and Diplomatic Roles
Vatican City stands as one of the most inaccessible nations for gaining citizenship. Citizenship is exclusively granted to clergy, diplomats, or Church workers. There is no pathway for ordinary outsiders, making Vatican City highly exclusive in its naturalization process.
Liechtenstein: Strict Residency and Approval Conditions
In Liechtenstein, foreigners must reside in the country for at least 30 years to qualify for citizenship. Those married to Liechtenstein residents can apply after five years of marriage, but approval is highly selective, emphasizing long-term residency and community integration.
Bhutan: Sovereign Discretion Rules
With just 20 years of residency needed, Bhutan’s citizenship process is at the sole discretion of the monarchy. Applicants must maintain a clean criminal record and demonstrate good moral standing—factors that make naturalization exceptionally difficult.
Saudi Arabia: A Minimum Residency Requirement
Saudi Arabia requires a minimum of 10 years of residence with fluency in Arabic and a clean criminal record. Despite the relatively shorter residency period, the approval process is selective, and naturalization is not guaranteed.
Kuwait: Demanding Residency and Religious Requirements
To become a Kuwaiti citizen, an applicant must have 20 years of continuous residency and be Muslim. Moreover, dual citizenship is prohibited, requiring individuals to renounce their original nationality if naturalization is granted.
Switzerland: Language and Residency Barriers
Switzerland’s 10-year residency rule coupled with the necessity for proficiency in one of the country’s national languages (German, French, Italian, or Romansh) makes the naturalization process quite rigorous, reflecting its emphasis on cultural integration.
China: A Very Restricted Path
China offers almost no straightforward naturalization routes. Citizenship may be granted only through special state approval, familial ties, or rare exceptional circumstances, leaving most foreigners with little hope of becoming Chinese citizens.
North Korea: An Opaque and Highly Restrictive Process
North Korea’s naturalization process is highly secretive and extremely restrictive. Dual citizenship is not permitted, and prospective citizens face an opaque, tightly controlled approval process that makes naturalization nearly impossible for outsiders.
Japan: A Stringent Residency and Language Test
Applicants need at least five years of legal residence, basic Japanese language ability, and must renounce previous citizenships to acquire Japanese citizenship. The process is stringent, emphasizing cultural assimilation.
United Arab Emirates: An Elite and Limited Pathway
The UAE requires 30 years of residency for most applicants, excluding certain categories like investors and talent that may qualify for special visas. The process is selective and usually reserved for highly skilled or wealthy individuals.
San Marino: Long-Term Residency with No Dual Citizenship
San Marino demands 30 years of residency for naturalization. However, it does not permit dual citizenship, requiring applicants to relinquish other nationalities, which limits options for many.
Austria: Language and Residency Requirements
To get Austrian citizenship, one must live in Austria for at least 10 years, demonstrate German language proficiency at B2 level, and pass a naturalization exam. Strict policies emphasize cultural and linguistic integration.
Monaco: High Residency Threshold
Naturalization in Monaco requires 10 years of residence and the individual must renounce any other citizenships. This makes Monaco highly exclusive, especially for foreigners seeking to join its tiny yet affluent community.
Finland: A Short Residency but Lingering Barriers
While just five years of residence is enough for Finnish citizenship, language requirements in Finnish or Swedish pose significant barriers. Mastery of the languages is a crucial criterion, making the process challenging despite the short residency period.
Source: TerraTern (2025)
Note: The journey to citizenship remains a complex and often lengthy process in many countries, shaped by cultural, political, and legal factors.
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