Citizenship by naturalization refers to becoming a citizen of a foreign country after fulfilling specific legal requirements set by that government. This path to citizenship can be taken through different routes depending on the nation’s laws.

The naturalization process can happen after long-term residency, citizenship by marriage, descent, investment, and more. However, embarking on this journey has many benefits, such as finding a home in another country and enjoying the privileges of the citizenship you have attained.

This guide will take you through a step-by-step guide on the citizenship by naturalization process, from the requirements to the application process, as well as a list of countries and their minimum residency requirements for citizenship by naturalization.

What is citizenship by naturalization?

Citizenship by naturalization is the legal process by which a non-citizen of a country willingly acquires citizenship of that country after meeting specific requirements set by that nation’s laws.  

It allows individuals who have lived in a country for a certain period, often as permanent residents, to become full citizens, gaining rights like voting, holding public office, and obtaining a passport. 

Unlike citizenship by birth or descent, naturalization is based on fulfilling residency, language, and civic obligations and demonstrating loyalty to the country. 

How to Obtain Citizenship by Naturalization

There are many routes to obtaining citizenship through naturalization. Many countries offer naturalization services with pathways that typically involve meeting specific residency, legal, or social criteria over time.

Here are the different ways to qualify for naturalization:

Residency-based naturalization

One of the most common ways to become a naturalized citizen is to live in a country for several years. Many countries require individuals to live in the country for a certain time as permanent residents before they can apply for citizenship. The residency requirement typically ranges from three to ten years, depending on the country.

Marriage to a citizen

Another fast way to get citizenship is by naturalization through marriage. Spouses of citizens can often apply for citizenship through a citizenship by marriage pathway. This generally requires a shorter residency period, usually two to five years, and proof of a genuine relationship.

Descent or family connection

Some countries offer citizenship to individuals who can prove ancestry or family ties to a country’s citizens, even if they were born abroad. For instance,  Ireland allows children born with Irish ancestry or descent to claim citizenship through the Foreign Births Register. Italy also offers citizenship by descent if you have an Italian ancestor, regardless of how many generations back, as long as certain legal conditions are met.

Military service

Several countries offer expedited citizenship to foreign nationals who serve in their military. This is common in countries like the United States, where non-citizens can become citizens more quickly by serving in the armed forces.

Economic investment

Another effective and fast path to becoming a naturalized citizen is citizenship through investment programs. Some countries grant citizenship to individuals who make significant financial investments, such as in real estate or government bonds. Countries such as Turkey, Malta, and St. Kitts & Nevis offer this option.

Citizenship by Naturalization Processes in Different Countries

Many countries offer more accessible paths to citizenship by naturalization, while some are known for their sought-after passports. The nations below are worth highlighting for their varying naturalization requirements, including residency, language proficiency, cultural integration, and dual citizenship allowances.

1. Spain

Residency requirement

Spain requires ten years of continuous legal residency to apply for naturalization. However, the residency requirements are shorter for citizens of Latin American countries, Portugal, Andorra, the Philippines, Equatorial Guinea, and Sephardic Jews (two years).

The requirement is just one year for individuals married to a Spanish citizen or born in Spain to foreign parents. The nation stands out for providing special treatment based on historical ties and for its attractive Spain Golden Visa, which offers several investment options that will lead to citizenship.

Additional requirements

  • Proof of integration, including knowledge of Spanish culture and language (through the DELE exam for Spanish language proficiency).
  • A clean criminal record in both Spain and your home country.
  • Proof of financial stability and contribution to society.

Application process duration

  • After submitting supporting documents and undergoing an interview, the processing may take up to two years.

2. Portugal

Residency requirement

Portugal is one of the more flexible European countries in terms of naturalization. There is a five-year residency requirement and no obligation to renounce previous citizenship. The country also stands out for its Portugal Golden Visa, which is particularly appealing because it offers another way to obtain citizenship through investment.

Additional requirements

  • Proof of basic knowledge of the Portuguese language (A2 level)
  • Clean criminal record
  • The option to retain original citizenship (Portugal allows dual citizenship).
  • There is no requirement to demonstrate economic contribution or financial stability.

Processing time 

  • After applying, the permanent resident can expect the process to take one to two years to complete.

3. Italy

Residency requirement

Ten years of lawful permanent residence is required for non-EU citizens to apply for naturalization in Italy. However, shorter periods apply for those married to an Italian citizen, with two years of residence in Italy or three years abroad, provided they meet the continuous residence and physical presence requirements. Dual citizenship is also allowed.

Additional requirements

  • A sufficient level of Italian language proficiency (B1 level).
  • Proof of stable income and accommodation.
  • Clean criminal record in Italy and any countries of prior residence.

Processing time

  • Italy has one of the slower processes, and naturalization applications can take several years to be fully processed.

4. New Zealand

Residency Requirement

New Zealand requires the applicants to be lawful permanent residents for five years before the application date. While dual citizenship is allowed, applicants must spend most of this time physically present in the country.

Additional Requirements

  • Proof of good character (including police clearance certificates from all countries where the applicant has lived for 12 months or more).
  • Knowledge of New Zealand’s customs, language, and values.
  • Financial stability or a job offer is not mandatory, but applicants must not have outstanding debts to the government.

Processing time

  • After applicants submit their forms, provide proof of residence, and undergo a thorough character assessment,  processing time can range from 12 to 18 months.

5. Ireland

Residency Requirement

Ireland requires five years of residency out of the previous nine years (with at least one year of continuous residence before applying). However, the requirement is three years of residence for those married to an Irish citizen. The country also permits dual citizenship.

Additional Requirements

  • Applicants must be of “good character,” as assessed by Garda vetting (police clearance).
  • Basic knowledge of Irish culture is preferred but not tested.
  • Ireland allows dual citizenship, so you don’t need to renounce your previous nationality.

Processing time

  • After applicants file their documents, processing times can vary but generally take 18 to 24 months. Approval is subject to ministerial discretion.

6. United States

Residency Requirement

The U.S. has one of the most sought-after passports. Before applying for naturalization, one must have five years of continuous legal residency, which includes holding a Green Card (lawful permanent resident status). The requirement is reduced to three years for Green Card holders married to U.S. citizens. Engaging with Citizenship and Immigration Services and the Immigrant Legal Resource Center can provide additional guidance through the process.

Additional Requirements:

  • Applicants must demonstrate good moral character, including no serious criminal convictions and adherence to U.S. laws.
  • Pass a civics test and an English language proficiency test.
  • Applicants must take an Oath of Allegiance.
  • Filing fees are also to be expected

Processing time:

  • The process involves submitting an application, attending an interview, and taking the citizenship test. Processing times can vary but generally take six to 12 months after the interview.

The Average Period for Naturalization in Different Countries

The average period of naturalization, also known as the time it takes to become a citizen through the naturalization process, can vary significantly from country to country. Here are some examples of the average periods observed in different countries:

Country

Average Period

United States

Approximately five years

Canada

About three to five years

Australia

Around four years

United Kingdom

Typically five years

Germany

Varies, but typically around eight years

Sweden

Approximately five years

Switzerland

Generally ten years

It’s important to note that the average periods mentioned above are approximate and can vary based on individual circumstances, such as language proficiency, age, permanent resident status, and other factors. Additionally, changes in immigration policies and laws can impact the average periods over time.

Countries with the Fastest Way to Citizenship by Investment

If taking the route of citizenship by investment looks like an option that aligns with your needs, then there are many options to choose from. Several countries offer citizenship by investment programs that provide an accelerated pathway to citizenship in exchange for significant financial contributions.

Here are seven countries that are known for their relatively fast routes to citizenship through investment and immigration benefits:

1. Cyprus

The Cyprus Golden Visa program is a great option. This program requires investing in real estate, government bonds, or business ventures, which will get you a lawful residence permit within three months.

2. Malta

Malta’s Residency by Investment program requires a direct, nonrefundable investment, real estate purchase, and philanthropic donation. Citizenship is then achievable within approximately 12 months.

3. St. Kitts and Nevis

For the St. Kitts and Nevis Citizenship by Investment Program, an investor must make a financial contribution to the Sustainable Island State Contribution (SISC) or an investment in real estate. Citizenship can be obtained in approximately 12 months.

4. Antigua and Barbuda

The Antigua and Barbuda Citizenship by Investment Program requires a contribution to the National Development Fund or investments in real estate or businesses. This makes it one of the fastest countries to obtain citizenship, as the process can take approximately four to five months.

5. Grenada

Grenada’s Citizenship by Investment Program requires contributing to the National Transformation real estate investments. Citizenship can be obtained within approximately nine months.

6. Saint Lucia

Saint Lucia also offers a fast route to citizenship through investment. The Saint Lucia Citizenship by Investment program provides citizenship through contributions to the National Economic Fund, real estate investments, or government bonds, with a processing time of approximately ten to 12 months.

7. Vanuatu

Vanuatu’s citizenship by investment program does not require residency. It is one of the fastest globally, often taking only three months to receive a passport. Applicants must donate to the government fund, and the process does not require language proficiency, making it a popular option for those seeking fast citizenship.

Find out more about Citizenship by Investment Countries and Programs Lists for 2024

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General Requirements for Citizenship by Naturalization

Requirements for obtaining citizenship through naturalization vary from country to country, but they generally revolve around a set of standard requirements you must meet. However, certain circumstances may alter the process depending on the government. 

Here are the critical and often considered requirements considered by immigration services that grant citizenship through naturalization:

Residency requirement

Features of naturalization naturalization applicants citizenship and immigration services military service united nations high commissioner good moral character united states citizenship citizen parent military applicants selective service system online account service membersMost countries need a period of continuous residency as a prerequisite for naturalization. This means that when you apply for naturalization, you must have lived in the country for a specified number of years, usually uninterrupted, before applying for citizenship.

The duration of residency you must meet can vary widely, depending on the country, as eligibility for naturalization varies from a few years to over a decade.

Countries like the U.S. require applicants to first become lawful green card holders for at least five years before applying for citizenship by naturalization and to have continuous residence and physical presence in the U.S. for at least half of the required residency period.

Good moral character

Maintaining good moral character is an essential criterion for naturalization. It implies that the applicant or naturalized citizen should have a clean criminal record without criminal convictions and sound character.

Countries that grant citizenship may need to conduct background checks and scrutinize applicants’ and naturalized citizens’ conduct, behavior, and reputation during residency to assess their moral character. 

The U.S. is another country that requires good moral character as a specific requirement for the naturalization process. Applicants cannot be involved in minor offenses like DUIs or failure to pay child support, as this can affect their eligibility.

Language proficiency

Language proficiency is often a requirement to demonstrate integration and the ability to communicate effectively in the host country. Many countries require applicants to pass language tests to ensure a basic understanding of the official language(s). This proficiency requirement may involve written, spoken, and comprehension skills.

For example, the United Kingdom requires passing an English test and demonstrating knowledge of life in the UK during the naturalization process, as do Sweden and the Netherlands, which require passing the Civic Integration Examination with a language proficiency assessment.

Knowledge of the country’s history

To ensure a meaningful connection and integration into the host country, applicants may be required to demonstrate knowledge of its history, culture, and institutions.

This knowledge can be assessed through citizenship tests or interviews, where applicants may be asked questions about the country’s political system, geography, customs, and traditions.

Dual citizenship considerations

Some countries allow dual citizenship, while others may require you to renounce your original citizenship before becoming a naturalized citizen. For instance, countries such as the United Kingdom, Mexico, and Italy recognize multiple citizenship and dual nationality, allowing individuals to acquire passports without renouncing their existing citizenship.

Application Process for Citizenship by Naturalization

at least three months developmental disability disability exceptions income tax returns become a u.s citizen form n two ways born outside military service permanent resident requirements established By the time the process reaches the application stage, it means thorough research has been conducted on the immigration laws and regulations for citizenship by naturalization in the country where the applicant wishes to live.

The application process for obtaining citizenship by naturalization differs in many countries. Many nations follow a general step-by-step process, but some may require additional requirements. 

Here is a typical step-by-step process for obtaining citizenship by naturalization. 

1. Ensure eligibility

The first step for naturalization applicants is to confirm that they meet the basic requirements, such as legal residency for a set number of years, a clean criminal record, and financial stability.

2. Submit naturalization application

Complete the application form provided by the relevant government body (e.g., immigration or citizenship office) and pay the required fees.

3. Provide supporting documents

Another important step that may determine the processing time is submitting necessary and correct documents, which may include: 

  • Proof of residency status,
  • Identification,
  • Tax records,
  • Other documents to demonstrate integration (e.g., employment or community involvement).

4. Pass language and knowledge tests

A step to prove integration in society is to take a test to demonstrate proficiency in the country’s official language and pass a civics test covering the country’s history, government, and laws.

5. Attend an interview

Some countries require an in-person interview to assess your understanding of the country’s values, laws, and reasons for seeking citizenship. For example, countries like France and Australia require interviews with local authorities to assess integration, language skills, and knowledge of the countries’ society.

6. Undergo background checks

Authorities will conduct a background check to verify your criminal record, financial history, and overall character to ensure you meet the good moral character requirement.

7. Wait for decision

After completing all the steps, wait for the decision on your application. Depending on the country’s processing times, this may take several months.

8. Take the oath of allegiance

Once at this step, the process is coming to an end. If approved, you will be invited to take an oath of allegiance, formally pledging loyalty to the country and agreeing to abide by its laws and values.

9. Receive citizenship certificate

After taking the oath, you will receive your citizenship certificate, officially confirming your status as a naturalized citizen.

Take a look at our Citizenship by Investment Comparison Guide

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Frequently Asked Questions about Citizenship through Naturalization Process

What is citizenship through naturalization?

Citizenship through naturalization refers to the process through which an individual acquires citizenship of a country by meeting the legal requirements for acquired citizenship set by that country, typically involving residency, language proficiency, and passing a citizenship test.

What are the five requirements for naturalization?

The specific requirements for naturalization vary from country to country but generally include:

a) Meeting the minimum residency government

b) Having a lawful immigration status

c) Demonstrating knowledge of the country’s language, history, and government

d) Passing a citizenship test or interview

e) Displaying good moral character and abiding by the country’s laws

Is naturalization the same as citizenship?

Naturalization is the process of obtaining citizenship, while citizenship is the legal status of a member of a particular country. Naturalization is how an individual becomes a citizen, while citizenship is holding the status of being a citizen of a particular country and also encompasses the rights, privileges, and responsibilities that the citizens of the country can enjoy.

How long does it take to get citizenship through naturalization?

The length of time it takes to obtain citizenship through naturalization can vary depending on several factors, including the country where you are applying for citizenship, your individual circumstances, and the efficiency of the immigration system in that country.

In the United States, for example, the process typically takes several years.

What does it mean to get naturalization?

Naturalization is the process by which a foreign citizen or national becomes a citizen or national of another country. It’s typically a legal process governed by the laws of the country in which the individual seeks citizenship.

What is a naturalized citizen?

A naturalized citizen is an individual who has acquired citizenship in a country through the process of naturalization, as opposed to citizenship acquired by birth.

What documents are needed for the naturalization application?

The documents needed for a naturalization application vary by country but generally include the following:

  1. Proof of Residency
  2. Birth Certificate
  3. Passport
  4. Proof of Legal Entry and Status
  5. Criminal Record Check
  6. Language Proficiency Certificate.
  7. Civic Knowledge Test
  8. Proof of Economic Activity
  9. Marriage Certificate (if applicable)
  10. Photo:
  11. Application Form

Can I apply for naturalization if I have dual citizenship?

Yes, in many countries, you can apply for naturalization even if you already hold dual citizenship, but the rules vary significantly depending on the country.

How long does the citizenship by naturalization take in the U.S?

The process for obtaining U.S. citizenship by naturalization generally takes about 6 to 12 months, from the naturalization interview to the naturalization ceremony. However, this timeframe can vary based on individual circumstances and location.

What are the general eligibility requirements for naturalization in the U.S.?

  • Must have 5 years of continuous legal residency as a Green Card holder, or 3 years if married to a U.S. citizen.
  • Must demonstrate good moral character and adherence to U.S. laws.
  • Must pass an English test (unless exempt due to age or disability).
  •  Must pass a civics test on U.S. history and government.
  • Must take an Oath of Allegiance to the United States.