Citizenship Guides
Complete guide to US citizenship through naturalization: eligibility, residency, language, civics test (100 or 128 questions), application steps, and 2026 timelines.
Becoming a US citizen is one of the most significant legal milestones available to immigrants. The process is called naturalization, and it follows a defined sequence: meet eligibility requirements, file Form N-400, attend a biometrics appointment, complete an interview that includes the civics and English tests, and take the Oath of Allegiance. Understanding each stage reduces surprises and makes the timeline predictable.
Most applicants qualify through the standard naturalization path, which has five main requirements:
Lawful permanent resident (green card) status. You must have held a green card before applying. The green card must be current and valid; a lapsed or conditional green card requires resolution before you can file N-400.
Continuous residence for 5 years. You must have lived in the United States continuously as a permanent resident for at least 5 years before filing. "Continuous" does not mean you cannot travel, it means you have not abandoned your US residence. Trips abroad of 6 months or longer raise a presumption that continuous residence was broken; trips over 1 year almost always break it. Single trips under 6 months generally do not count against you.
Physical presence for at least 30 months. Within the 5-year window, you must have been physically present in the United States for at least 30 months in total (half the period). This is counted in days and is calculated by USCIS from your travel history.
Residence in a state or USCIS district for at least 3 months. You must have lived in the state or USCIS district where you file for at least 3 months immediately before filing.
Good moral character. USCIS evaluates your conduct during the statutory period (5 years, or 3 years if married to a US citizen). Certain criminal convictions, particularly aggravated felonies, are permanent bars to naturalization. Other issues, such as failure to file taxes or failure to register for selective service, can be addressed before filing.
If you have been married to and living with a US citizen for at least 3 years, and you have held a green card for those 3 years, you can apply after 3 years of continuous residence rather than 5. The physical presence requirement drops to 18 months. The marriage must be ongoing at the time of filing, interview, and naturalization.
Military service members and veterans have different rules, some can apply immediately without any residence or physical presence requirement if they served during a designated period of conflict. Children of US citizens may acquire citizenship automatically under different statutes (INA § 320 or § 322) without going through naturalization.
Form N-400 (Application for Naturalization) is the primary application. As of 2026, the filing fee is $760 on paper or $710 online. A reduced fee of $380 applies if your household income is not more than 400 percent of the Federal Poverty Guidelines, and fee waivers are available for qualifying applicants (reduced-fee and fee-waiver requests must be filed on paper).
N-400 can be filed online through your USCIS account or by paper. Online filing is generally faster to process. The application asks about your personal history, travel history for the past 5 years, employment for the past 5 years, and a series of questions about your moral character and background.
File your N-400 no more than 90 days before you meet the continuous residence requirement. USCIS allows early filing within this 90-day window as an exception to encourage timely applications.
After filing, USCIS schedules a biometrics appointment at an Application Support Center near your address. You provide fingerprints, photograph, and signature. The appointment typically happens 4 to 8 weeks after filing. You cannot reschedule without good cause, so plan around it.
The interview is conducted by a USCIS officer at a local field office. It covers two components: your N-400 application and the civics and English tests.
The officer will review your N-400 in detail. Bring original documents for everything you referenced in the application: passport, green card, tax returns, and any court records if applicable. Inconsistencies between your application and your testimony can delay or deny your case.
You must demonstrate an ability to read, write, and speak English. The officer will ask you to read a sentence aloud (you get up to three sentences and need to read one correctly), and write a sentence the officer dictates (again, one correct out of up to three). Speaking ability is assessed throughout the interview. There is no separate exam, the interview itself is the speaking test.
Exemptions exist. If you are 50 or older when you file and have held a green card for 20 years, you are exempt from the English requirement; you still take the civics test, and may take it in your native language with an interpreter you bring (the "50/20 exemption"). If you are 55 or older and have held a green card for 15 years, the same applies (the "55/15 exemption"). Applicants with a physical or developmental disability or a mental impairment that has lasted, or is expected to last, at least 12 months may request a medical exception using Form N-648, completed by a licensed medical doctor, doctor of osteopathy or clinical psychologist.
The USCIS civics test covers 100 questions across 6 topic areas:
During the interview, the USCIS officer asks up to 10 of the 100 questions. You need to answer 6 out of 10 correctly to pass. This is the 2008 version of the test. If you filed your N-400 on or after October 20, 2025, you take the 2025 version instead: up to 20 questions from a pool of 128, with 12 correct needed to pass. Questions are asked orally; you answer orally. There is no multiple choice.
The test is retakable. If you fail, you have one additional opportunity within 60 to 90 days at a second interview. Failing both attempts results in denial of the N-400.
Note: Applicants who are 65 or older and have held a green card for 20 years are exempt from the English requirement and qualify for a simplified version of the civics test: only 20 questions designated with an asterisk in the mock list, from which the officer asks 10 and they must answer 6 correctly (on both the 2008 and 2025 versions).
The questions most frequently missed by first-time test takers are not the constitutional ones, those are memorized early. The ones that cause failures are:
Current elected officials. Questions about who your US Representative is, who your two US Senators are, and who the current President and Vice President are require you to know real-time information, not fixed historical facts. USCIS updates the 100 questions list regularly to reflect current officeholders. Always verify these before your interview.
Specific dates and firsts. The Declaration of Independence was adopted on July 4, 1776. The Constitution was written in 1787. The Bill of Rights was ratified in 1791. These are consistently tested and easy to confuse.
Economic system questions. "What is the economic system of the United States?" (capitalist economy / market economy) and similar questions about how the US economy works are tested but underemphasized in most study materials.
Processing times vary significantly by USCIS field office and current application volumes. As of 2026, the median processing time from filing N-400 to the interview and oath is 12 to 18 months. Some offices process faster (8 to 10 months); some field offices have backlogs of 24 months or more. You can check current processing times for your specific field office on the USCIS website using your receipt notice information.
If approved at your interview, USCIS may schedule your oath ceremony immediately (same-day ceremony at some offices) or send you a notice to appear at a later ceremony. At the ceremony, you renounce allegiance to foreign sovereignties, swear to support the US Constitution, and take the Oath of Allegiance. You receive a Certificate of Naturalization at the ceremony. From that document, you can apply for a US passport, register to vote, and exercise all rights of citizenship.
All 100 questions of the 2008 test, and all 128 of the 2025 test, are publicly available on the USCIS website. The content is defined and does not change unexpectedly. The challenge is not the difficulty of the material, it is the active recall required to answer questions correctly without prompts during the interview. Reading the 100 questions once is not enough for most applicants; systematic practice that tests recall is the difference between passing comfortably and arriving uncertain.
Want to test yourself now? Work through 30 real USCIS practice questions with answers and explanations, drawn from the same pool as your interview, or explore the full CivicPass USA prep experience.