US Citizenship Requirements: Path from Green Card to American Passport
After obtaining a green card, many permanent residents aspire to become U.S. citizens through naturalization. U.S. citizenship provides the right to vote, a U.S. passport, protection from deportation, and the ability to petition for family members. The process involves meeting specific requirements and passing tests on English language and U.S. civics.
Basic Eligibility Requirements
To apply for naturalization, you must be at least 18 years old, be a green card holder for at least 5 years (or 3 years if married to a U.S. citizen), have been physically present in the U.S. for at least 30 months out of the 5-year period, and have lived in the state where you file for at least 3 months.
You must also demonstrate continuous residence in the U.S. without any single absence exceeding 6 months. Absences of more than 6 months but less than 1 year may disrupt continuous residence unless you can show you maintained ties to the U.S.
The English Language Requirement
Applicants must demonstrate the ability to read, write, and speak basic English. During the naturalization interview, USCIS tests English ability through conversation, a reading test (reading one of three sentences correctly), and a writing test (writing one of three sentences correctly).
Exemptions exist for applicants over 50 who have held a green card for 20+ years, and those over 55 with 15+ years as a green card holder. These individuals may take the civics test in their native language.
The Civics Test
The civics test covers U.S. government and history. USCIS provides a list of 100 possible questions, and during the interview, the officer asks up to 10 questions. The applicant must answer at least 6 correctly. Topics include the Constitution, branches of government, American history, and geography.
Study materials are available for free on the USCIS website, including practice tests, flash cards, and study guides in multiple languages. Many community organizations also offer free citizenship test preparation classes.
The Application Process (Form N-400)
The naturalization process begins with filing Form N-400, Application for Naturalization. The current filing fee is $760 (which includes the biometrics fee). After filing, applicants attend a biometrics appointment for fingerprinting, then a naturalization interview where the English and civics tests are administered.
If approved, the final step is attending a naturalization ceremony where you take the Oath of Allegiance to the United States. You receive your Certificate of Naturalization at the ceremony and become a U.S. citizen immediately.
Benefits of U.S. Citizenship
U.S. citizens can vote in federal elections, serve on juries, run for public office, obtain a U.S. passport, sponsor family members for green cards without waiting lists (for immediate relatives), and are protected from deportation. Citizens also have access to certain government jobs and security clearances that green card holders do not.

Satoshi Onodera
Founder & CEO, Reinvent NY Inc.
In 2019, Satoshi left his career at NTT Data and Mercari, self-funded an E-2 investor visa, and relocated to New York to start Reinvent NY. Today, the company serves over 100 clients from 20+ countries with E-2 visa consulting, real estate, and relocation support. Satoshi holds a New York State Real Estate License.
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Schedule a ConsultationFrequently Asked Questions
How long after getting a green card can I apply for citizenship?
Generally 5 years after becoming a permanent resident, or 3 years if married to a U.S. citizen.
How hard is the citizenship test?
The test is manageable with preparation. You must answer 6 out of 10 civics questions correctly and demonstrate basic English ability.
Can I keep my original citizenship?
The U.S. generally allows dual citizenship, though some countries may require you to renounce their citizenship. Check your home country's laws.