Immigration Forms Guide
Naturalization is the final step in the immigration journey for most permanent residents. Here's your complete guide to the N-400 process for 2025.
To become a US citizen through naturalization, you must satisfy several requirements established by the Immigration and Nationality Act. The foundational requirement is lawful permanent residence, you must be a green card holder. Additionally, you must have been a permanent resident for at least five years (or three years if you are married to and living with a US citizen who has been a citizen for at least three years throughout the marriage).
Continuous residence is a critical concept in naturalization eligibility. You must have continuously resided in the United States for the required period. A single trip outside the US of more than six months but less than one year raises a presumption of disrupted continuous residence that can be rebutted. A trip of one year or more presumptively breaks continuous residence entirely. Multiple shorter trips can also add up to interrupt continuous residence. If you've traveled extensively, have an immigration attorney review your travel history before filing.
Physical presence requirements are distinct from continuous residence. You must have been physically present in the US for at least 30 months out of the 5-year period (18 months for the 3-year path). Counting physical presence days from passport stamps and travel records is essential, USCIS officers routinely verify this calculation at the interview. Apps and spreadsheets designed for tracking physical presence days are useful tools during the preparation phase.
Good moral character is required during the statutory period and often extends to all prior conduct. Criminal convictions, including misdemeanors, drug offenses, and certain traffic violations, can affect good moral character findings. Certain bars are permanent (murder, aggravated felony) while others cover only the statutory period. Tax compliance, support obligations, and selective service registration also factor into good moral character determinations. If you have any legal issues in your history, consult an immigration attorney before filing.
Form N-400 is a comprehensive form with 20 parts covering your biographical information, immigration history, residence, employment history, travel history, marital history, and numerous character questions. The form must be completed truthfully, misrepresentation or omission is a federal crime and a deportable offense. Read each question carefully and answer literally; what seems like an ambiguous question has a specific legal meaning that may differ from common usage.
Required supporting documents include: a copy of both sides of your green card; copies of any prior N-400 rejections or denials; your foreign-born children's birth certificates (if applicable); marriage certificate if married; divorce documents if previously married; records of any arrests, citations, or criminal convictions worldwide; records of any removal or deportation proceedings; and evidence of name changes. The N-400 instructions provide a complete document checklist by question category.
The filing fee is $760 plus $85 biometric fee, totaling $845 for most applicants. Fee waivers are available for applicants at or below 150% of FPG, file Form I-912 (Request for Fee Waiver) with your N-400. Some applicants qualify for fee exemptions based on military service or based on receiving certain federal public benefits. Reduced fees may be available under new USCIS fee schedules, check USCIS.gov for the current schedule.
N-400 can be filed online through myUSCIS or by mail. Online filing provides instant receipt confirmation and allows tracking through the USCIS online account. The application is filed with the USCIS service center that serves your jurisdiction. After filing, you will receive a receipt notice, then a biometrics appointment, then an interview notice, typically scheduled at your local USCIS field office.
The naturalization civics test evaluates your knowledge of US history and government. USCIS maintains an official list of 100 civics questions and answers, available on their website and as a free app. During the naturalization interview, an officer asks up to 10 questions drawn from this list. To pass, you must answer at least 6 of the 10 questions correctly. If you fail, you have one more opportunity to take the test.
Effective January 2024, USCIS restored the 2008 civics test as the standard test for most applicants, after a period of experimentation with a 2020 version that had 128 questions. Confirm which version applies to your filing date on USCIS.gov. Studying the official 100-question list systematically, rather than relying on general US history knowledge, is the most reliable preparation strategy. Many local libraries and community organizations offer free civics test preparation classes.
The English language requirement involves reading, writing, and speaking English. During the interview, the officer will conduct the entire conversation in English and ask you to read one sentence and write one sentence in English. Most applicants who have lived and worked in the US for five years find this requirement manageable. Exemptions from the English requirement exist for applicants who are 50 years old or older and have been a permanent resident for 20 years, or 55 years old and have been a permanent resident for 15 years, these applicants may take the civics test in their native language with an interpreter.
Medical exemptions from the civics and English requirements are available for applicants with permanent, developmental, or physical disabilities that prevent them from meeting the standard requirements. The applicant's physician completes Form N-648 (Medical Certification for Disability Exceptions) to document the disability and its impact. N-648 applications receive individualized review and are not automatically approved, the disability must genuinely prevent meeting the standard requirements.
The naturalization interview is a crucial step in the N-400 process, typically scheduled several months after filing. You will be called to your local USCIS field office where an officer reviews your N-400 application, verifies your documents, conducts the English reading and writing test, and administers the civics test. The officer also asks questions about your background, particularly the character questions from the N-400.
Preparation is essential for the interview. Review your completed N-400 before the interview, the officer may ask you to clarify or confirm answers you gave on the form. Any changes since filing (address, marital status, travel) should be disclosed. Bring originals of all documents you submitted copies of, plus your green card and government-issued photo ID. Arrive early, dress professionally, and bring all requested documents organized and accessible.
If you pass the interview, the officer may approve your application on the spot, inform you of approval by mail, or in some cases request additional evidence before a final decision. If the application is continued for additional evidence, respond promptly and comprehensively. If denied, you receive a written denial with reasons and have 30 days to file Form N-336 to request a hearing before a different USCIS officer.
Some applicants receive interview notices that include a notice to appear for the oath ceremony on the same day as the interview, a same-day naturalization, typically done in group ceremonies at the field office. If not done on interview day, the oath ceremony is scheduled separately, sometimes weeks or months later. The ceremony itself involves taking the Oath of Allegiance, receiving your naturalization certificate, and becoming a US citizen.
Naturalization confers the full rights of US citizenship. You can vote in federal, state, and local elections. You can apply for a US passport, which provides visa-free or visa-on-arrival access to over 180 countries. You can petition for additional family members as a citizen (not just as an LPR) and potentially bring them on a faster track. You can apply for federal jobs that require US citizenship. Your green card is no longer required, you surrender it at the oath ceremony or when applying for your passport.
After the oath ceremony, immediately apply for a US passport using your naturalization certificate as proof of citizenship. The passport is your primary travel document as a citizen and also serves as proof of citizenship for employment verification, Social Security name changes, and other administrative purposes. The naturalization certificate itself is a critical document, keep the original safe and make certified copies for routine use.
If you have minor children who are lawful permanent residents, they may automatically acquire US citizenship upon your naturalization under the Child Citizenship Act of 2000, if they are under 18, residing in the US with you, and are LPRs. You can apply for a Certificate of Citizenship (Form N-600) to document their citizenship status, or simply obtain a US passport on their behalf using your naturalization certificate as evidence of their citizenship by derivation.
Some countries do not allow dual citizenship. Before naturalizing as a US citizen, check whether your country of birth allows dual nationality. Naturalizing as a US citizen may result in involuntary loss of your original citizenship in some countries. This decision is personal and depends on your ties to your home country, your tax obligations, property rights, and family considerations. An international tax attorney may be helpful if you have significant financial interests in your home country.
H1B Job Board Editorial Team
Immigration Research & Policy Analysis
Our team monitors USCIS policy updates and processing time data. All guides are reviewed for accuracy against current USCIS guidance.