Naturalization (Form N-400): Eligibility Basics and the Civics Test Overview from USCIS
By Pacheco Couceiro
Families and lawful permanent residents in Brownsville and across the Rio Grande Valley often look for official information about becoming a U.S. citizen through naturalization. U.S. Citizenship and Immigration Services (USCIS) publishes general eligibility requirements, explains Form N-400, Application for Naturalization, and describes the English and civics tests. This article summarizes those federal materials as checked on October 16, 2026. It does not say whether any specific person is eligible, does not promise a result, and is not a substitute for individualized legal advice.
What naturalization is
USCIS states that naturalization is how a person not born in the United States voluntarily becomes a U.S. citizen. The most common path is being a lawful permanent resident (LPR) for at least five years (USCIS: I am a Lawful Permanent Resident of 5 Years). Form N-400 is the application used if you meet the eligibility requirements (USCIS: Form N-400).
General eligibility: five-year lawful permanent resident path
To be eligible based on at least five years as a lawful permanent resident, USCIS lists (among other requirements) that you must be at least 18 when you submit Form N-400; have been a lawfully admitted permanent resident for at least five years; show continuous residence for five years immediately before filing; show physical presence for at least 30 months of those five years; have lived at least three months in the state or USCIS district of residence; show good moral character for at least five years immediately before filing; demonstrate attachment to the Constitution; read, write, and speak basic English; know U.S. history and government (civics); and take an Oath of Allegiance (USCIS: I am a Lawful Permanent Resident of 5 Years, last reviewed/updated March 16, 2026; checked October 16, 2026).
USCIS also notes that certain applicants, because of age and time as an LPR, may be excused from the English test and may take civics in another language; see the agency's exceptions materials and the USCIS Policy Manual (USCIS: I am a Lawful Permanent Resident of 5 Years).
General eligibility: three-year path for certain spouses of U.S. citizens
USCIS separately describes naturalization under INA section 319(a) for certain applicants married to a U.S. citizen. In general that path includes being at least 18 when you file Form N-400; at least three years as a lawfully admitted permanent resident immediately before filing; marital union with the U.S. citizen spouse for those three years and while USCIS adjudicates; three months in the state or USCIS district of residence; continuous residence for three years; physical presence of at least 18 months; English and civics; and good moral character and attachment to the Constitution for at least three years until the Oath of Allegiance (USCIS: I am Married to a U.S. Citizen). Different facts can lead to different statutory paths, including certain military-related categories. This article does not evaluate any individual case.
Continuous residence and physical presence
USCIS explains that applicants generally must show continuous residence for five years before applying, or three years for qualified spouses of U.S. citizens. Absences of more than six months but less than one year may disrupt continuous residence unless the applicant can prove otherwise; absences of one year or more may disrupt it (USCIS: Continuous Residence and Physical Presence Requirements for Naturalization). Physical presence generally means thirty months within five years, or eighteen months within three years for qualified spouses. Applicants also generally must show three months of residence immediately before filing in the USCIS district or state of claimed residency (USCIS: Continuous Residence and Physical Presence).
Form N-400: when and how to file (overview)
USCIS states that you may file Form N-400 up to 90 calendar days before you complete your continuous residence requirement if your eligibility is based on being a permanent resident for at least five years, or for at least three years if you are married to a U.S. citizen (USCIS: Form N-400).
You generally may file online or by mail. Online filing requires a USCIS online account. Fee-waiver or reduced-fee requests must be filed on paper with the required evidence (USCIS: Form N-400, last reviewed/updated June 16, 2026; checked October 16, 2026). Fees appear on the USCIS Fee Schedule and can change—check uscis.gov before filing.
The naturalization interview and test
During the naturalization interview, a USCIS officer asks questions about the application and background. Unless an exemption applies, the applicant also takes a naturalization test with two components: English and civics (USCIS: The Naturalization Interview and Test).
English test
USCIS states that you must demonstrate basic English reading, writing, and speaking. Speaking is assessed during the Form N-400 interview; reading and writing each require one correct sentence out of three. USCIS publishes vocabulary lists for study (USCIS: The Naturalization Interview and Test).
Civics test — which version applies (as of 2026-10-16)
USCIS (checked October 16, 2026) states that applicants who file Form N-400 before October 20, 2025, take the 2008 civics test; filings on or after that date take the 2025 civics test (USCIS: The Naturalization Interview and Test; USCIS: Study for the Test).
- 2008 civics test: an oral test; the officer asks up to 10 questions from a list of 100; you must answer 6 correctly to pass; you fail if you answer 5 of the 10 incorrectly (USCIS: The Naturalization Interview and Test).
- 2025 civics test: an oral test of 20 questions from a list of 128; you must answer 12 correctly to pass; you fail if you answer 9 of the 20 incorrectly (USCIS: The Naturalization Interview and Test).
USCIS publishes free study materials, including the official question lists, and a page to check for test updates when answers change because of elections or appointments (USCIS: Study for the Test; USCIS: Check for Test Updates).
If you do not pass on the first try
USCIS states that applicants get two attempts. If you fail English or civics at the first interview, you are retested on the failed portion between 60 and 90 days later (USCIS: The Naturalization Interview and Test).
Step by step: a practical overview for South Texas readers
Step 1: Read the official eligibility page that matches your situation
Start with five-year LPRs or spouses of U.S. citizens, and review continuous residence and physical presence.
Step 2: Review Form N-400 instructions and filing options
Read current Form N-400 and instructions on uscis.gov/n-400, including online versus paper and fee-waiver rules.
Step 3: Confirm which civics test version applies to your filing date
As of October 16, 2026, filings on or after October 20, 2025, take the 2025 test; earlier filings take the 2008 test (USCIS: The Naturalization Interview and Test).
Step 4: Use free USCIS study materials
Use Study for the Test and test updates.
Step 5: Prepare documents carefully
Follow the Form N-400 evidence checklist (for example, a copy of the Permanent Resident Card) on the current instructions (USCIS: Form N-400).
Step 6: Understand that eligibility and outcomes are case-specific
Federal law and USCIS policy set the requirements. Whether a particular person meets them depends on that person's facts. No article can approve or deny an application.
Frequently asked questions
Does living in the Rio Grande Valley change the federal naturalization rules?
No. Naturalization is federal law administered by USCIS. Local residence may affect which USCIS district has jurisdiction, which is one listed requirement (USCIS: I am a Lawful Permanent Resident of 5 Years).
Can I file Form N-400 early?
USCIS states that you may file up to 90 calendar days before you complete the continuous residence requirement for the five-year path or the three-year path based on marriage to a U.S. citizen (USCIS: Form N-400).
Which civics test will I take if I file in 2026?
According to USCIS (checked October 16, 2026), filings on or after October 20, 2025, take the 2025 civics test (20 of 128 questions; 12 correct to pass) (USCIS: The Naturalization Interview and Test).
Are USCIS study materials free?
Yes. See Study for the Test.
Where can I read the official sources?
Start with Form N-400, five-year LPR eligibility, spouse of U.S. citizen eligibility, continuous residence and physical presence, the naturalization interview and test, Study for the Test, and Check for Test Updates.
Questions in the Rio Grande Valley
Pacheco Couceiro assists individuals and families in Brownsville and South Texas with immigration matters under federal law. If you want to review Form N-400 requirements, residence records, or how USCIS describes the English and civics tests for your filing date, you can contact the office to discuss the official forms involved. This article does not create an attorney-client relationship and does not determine eligibility for any person.
This article is general information, not legal advice, and reading it does not create an attorney-client relationship.