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U.S. citizenship is the finish line for millions of permanent residents seeking definitive legal stability, full political rights, and the ability to sponsor family members without being held hostage by visa backlogs. More than a certificate, naturalization represents full integration into the American civic system — including the right to vote, run for non-elective federal positions, obtain a U.S. passport, and gain protection against deportation. This guide, based on official USCIS and Department of Homeland Security sources, explains who can naturalize, how much it costs, which tests must be passed, and how to avoid delays.
Citizen vs. Permanent Resident
A green card grants the right to live and work in the United States indefinitely, but it is not unconditional. Permanent residents can lose their status through prolonged absences, criminal convictions classified as crimes involving moral turpitude or aggravated felonies, and are subject to secondary inspection at every reentry. A citizen, on the other hand, cannot be deported for ordinary crimes, does not need to renew any status document, automatically transmits citizenship to minor children who are lawful residents under the Child Citizenship Act, and sponsors spouses, unmarried children, and parents as immediate relatives — a category with no annual numerical cap in the Visa Bulletin.
According to the Migration Policy Institute, approximately 53% of the legally resident adult immigrant population in the U.S. has already naturalized. In recent fiscal years, USCIS has granted between 800,000 and 1 million citizenships per year, with Brazilians consistently ranking among the top 25 nationalities naturalized.
Eligibility Requirements
The main criteria for the N-400 are set forth in INA §316 and §319. The applicant must be at least 18 years old at the time of filing, be a lawful permanent resident, and meet three simultaneous time-based requirements.
Green Card Holding Period
The general rule requires five years as a permanent resident before filing the N-400. Spouses of U.S. citizens may apply at three years, provided the marriage has been valid throughout that entire period and the American spouse has been a citizen for at least three years. Armed Forces members, refugees, and asylees have more favorable specific rules.
Continuous Residence
The applicant may not have absences from the U.S. exceeding six months without documented justification. Absences between six months and one year create a presumption of broken continuous residence, which must be rebutted with evidence (tax returns filed as a resident, maintenance of a home, family and professional ties in the U.S.). Absences exceeding one year completely reset the clock, unless prior approval of Form N-470 was obtained to preserve residence.
Physical Presence
The applicant must have been physically present in the U.S. for at least 30 months out of the last 5 years (18 out of the last 36 months for spouses of U.S. citizens). This calculation counts days, with international trips deducted in full.
Good Moral Character
Good moral character is assessed during the statutory period (5 or 3 years before filing through the ceremony). Permanent bars include convictions for murder and aggravated felonies committed after November 29, 1990. Conditional bars include fraud, prostitution, smuggling, professional gambling, two or more DUI convictions within the statutory period, false testimony to obtain an immigration benefit, and outstanding child support obligations.
Form N-400
The naturalization petition is the N-400, submitted electronically via a myUSCIS account or on paper. The form is 20 pages long and covers residential history for the past five years, employment, international travel, prior marriages, children, criminal history, and questions about political affiliation and moral conduct.
Supporting Documents
- Front and back copy of the green card (Form I-551)
- Two USCIS-format photos only if the applicant resides outside the U.S.
- Marriage certificate and proof of a bona fide union, for applications under §319(a)
- Divorce or death certificates for prior marriages of the applicant and spouse
- Income tax returns for the past five years (Form 1040 or IRS transcripts)
- Certified court dispositions for any arrest or criminal citation
- Proof of Selective Service registration for males between ages 18 and 26
Updated USCIS Fees
Since April 1, 2024, N-400 fees are USD 760 for paper filing and USD 710 for online filing. Biometrics, previously charged separately, are included in the fee. Families with income between 150% and 400% of the Federal Poverty Guidelines pay a reduced fee of USD 380 via Form I-942 (Request for Reduced Fee). A full fee waiver is available via Form I-912 for applicants who receive means-tested public benefits, have household income at or below 150% of the federal guidelines, or can document financial hardship.
Biometrics and Interview
After the N-400 is received, USCIS schedules fingerprint collection at an Application Support Center, typically three to eight weeks after filing. Attendance is mandatory; unexcused absences result in dismissal for abandonment.
The interview is the core of the process. The officer reviews all N-400 responses under oath, clarifies inconsistencies, and administers the two required examinations.
English Test
The test evaluates oral comprehension, reading, and writing. The applicant reads one of three sentences and writes one of three sentences dictated by the officer, all drawn from official vocabulary published by USCIS. Conversational ability is assessed throughout the entire interview.
Civics Test
The officer asks up to 10 questions orally, drawn from the official bank of 100 questions in the 2008 version (the 2020 version with 128 questions was rescinded in 2021). The applicant must correctly answer at least 6 out of 10. Topics cover American government, history, and geography, including questions such as the number of senators, the authors of the Federalist Papers, the year of independence, and the powers of the federal versus state governments.
Age and Medical Exemptions
The 50/20 rule exempts applicants who are 50 or older and have held a green card for 20 or more years from the English test; they may take the civics test in their own language. The 55/15 rule applies a similar exemption. Applicants who are 65 or older with 20 or more years as permanent residents take a simplified civics test with only 20 questions. Physical, mental, or developmental disabilities that prevent the applicant from taking the tests may be certified via Form N-648, completed by a licensed medical professional.
Re-interview and Ceremony
Failure in any portion allows one additional attempt, scheduled 60 to 90 days later, in which only the failed portion is retaken. Approval triggers a summons to the naturalization ceremony, where the applicant takes the Oath of Allegiance, receives the Certificate of Naturalization (Form N-550), and becomes a U.S. citizen legally from that moment forward.
Current Processing Times
Processing times vary substantially by field office. In mid-2025, USCIS reported a median of 5 to 8 months for 80% of cases, with congested offices such as Houston, Newark, Los Angeles, and Atlanta operating on longer timelines. The official dashboard at egov.uscis.gov/processing-times is the authoritative source for real-time checks.
Immediate Next Steps
After receiving the Certificate of Naturalization, the new citizen should apply for a U.S. passport (Form DS-11), update the Social Security Administration to reflect the change in status, register to vote in the state of residence, and consider formally renouncing original citizenships only if desired — keeping in mind that the U.S. permits dual citizenship in most cases.
Victoria Harper
Editor-in-Chief
Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.
