U.S. Citizenship Requirements: Who Qualifies for Naturalization
Naturalization is the legal process by which a non-U.S. citizen becomes a U.S. citizen. To qualify, you must meet a specific set of requirements set by USCIS. This guide explains each requirement in plain language.
Basic Eligibility Requirements
1. Be a Lawful Permanent Resident (Green Card holder)<br />Naturalization is not available to people on temporary visas, student visas, or work visas.
2. Meet the continuous residence requirement
- 5 years as a lawful permanent resident (standard)
- 3 years if married to and living with a U.S. citizen for the entire period
3. Meet the physical presence requirement
- At least 30 months out of the 5-year period (standard)
- At least 18 months out of the 3-year period (married to U.S. citizen)
4. Be at least 18 years old<br />Children may acquire citizenship automatically through a parent’s naturalization under certain conditions.
5. Be a person of good moral character<br />USCIS evaluates conduct during the statutory period. Certain criminal convictions, failure to pay taxes, failure to register for Selective Service, or making false statements to USCIS can affect eligibility.
6. Pass the English language test<br />Applicants 50 years old with 20 years as a permanent resident, or 55 years old with 15 years, are exempt from the English requirement (“50/20” and “55/15” exemptions).
7. Pass the civics test<br />Answer at least 6 out of 10 questions correctly. Applicants 65 or older with at least 20 years as a permanent resident may take a shorter version (20 questions to study).
8. Take the Oath of Allegiance<br />You must be willing to swear loyalty to the United States, renounce allegiance to other nations, and support and defend the Constitution.
Continuous Residence and Trips Abroad
- Under 6 months abroad: Generally does not disrupt continuous residence
- 6 months to 1 year abroad: Creates a presumption that continuous residence was broken — you may need to provide evidence
- 1 year or more abroad: Automatically breaks continuous residence
The N-400 Application
Form N-400, Application for Naturalization, is filed with USCIS along with:
- Copy of Permanent Resident Card
- Two passport-style photos
- Filing fee (verify current fee at uscis.gov)
- Supporting documents (tax returns, travel records, marriage certificate if applicable)
After filing, USCIS schedules biometrics and then a naturalization interview.
Special Circumstances
Military service: Members of the U.S. armed forces may qualify for expedited naturalization with reduced residency requirements.
Marriage to a U.S. citizen: Reduces required residency from 5 years to 3 years.
Children: Children under 18 with at least one U.S. citizen parent who are lawful permanent residents may automatically acquire citizenship under the Child Citizenship Act of 2000.
How to Prepare for the Civics Test
All 100 civics topics are publicly available — you know exactly what could be asked.
Our U.S. Citizenship Practice Tests include four 25-question sets covering all 100 civics topics. One-time $4.99 with unlimited retakes.
For a detailed study plan, see: How to Study for the U.S. Citizenship Civics Test.
For a full walkthrough of the naturalization interview, see: U.S. Citizenship Interview: What to Expect.
Studying for the civics geography questions? See: 50 US States and Capitals: Citizenship Test Study Guide
Practice Exam Hub is not affiliated with USCIS, the Department of Homeland Security, or any government agency. This content is for general informational purposes only. Immigration requirements may change — always verify current rules at uscis.gov.