Official USCIS Process
Every step from determining your eligibility through receiving your Certificate of Naturalization - sourced entirely from official USCIS documentation.
10 Steps · Avg. 8–24 Months · ~900K Citizens per Year
At a Glance
Numbers sourced directly from official USCIS documentation and current fee schedules.

Avg. 8–24 Months
Typical total processing time from filing to citizenship, depending on your field office
5 or 3 Years
Minimum years as a lawful permanent resident required to apply (3 years with a U.S. citizen spouse)
$760
Current USCIS filing fee for Form N-400 (paper). Fee waivers available for eligible applicants.
~900K / Year
Average number of people who naturalize as U.S. citizens each fiscal year
Step by Step
Every applicant follows this sequence. Each step is based on official USCIS guidance and the Immigration and Nationality Act.
Eligibility
You must meet all of these requirements before filing Form N-400. Each is grounded in the Immigration and Nationality Act.
Age
You must be at least 18 years old at the time of filing Form N-400. Children of citizens may acquire citizenship automatically under INA § 320.
INA § 334(b)
Lawful Permanent Residence
You must hold a valid Green Card. Most applicants need 5 years as an LPR; 3 years if you are married to and living with a U.S. citizen.
INA § 316(a)
Continuous Residence
You must have lived continuously in the U.S. for the required period. A single trip of 6+ months may break this. A trip of 1+ year creates a presumption of abandonment.
INA § 316(b); 8 CFR § 316.5
Physical Presence
You must have been physically present in the U.S. for at least half of the required residency period - at least 30 months (5-year path) or 18 months (3-year path).
INA § 316(a)(1); 8 CFR § 316.2(a)(5)
Good Moral Character
You must demonstrate good moral character for the full statutory period. USCIS evaluates criminal history, tax compliance, and honesty on your application.
INA § 316(a)(3); INA § 101(f)
English & Civics
You must demonstrate the ability to speak, read, and write basic English and pass a civics test of up to 20 questions. Age and residency-based exemptions apply.
INA § 312; 8 CFR § 312.1
Common Questions
You may file Form N-400 up to 90 days before you reach your 5-year (or 3-year) LPR anniversary. USCIS calls this the "early filing" window. Filing too early - outside that 90-day window - will result in rejection. Use the USCIS online eligibility tool to confirm your earliest possible filing date.
You are not denied immediately. USCIS will reschedule you for a second interview between 60 and 90 days later where you are retested on only the portion you failed (English or civics, not both if you passed one). If you fail again at the second interview, your application will be denied. You then have 30 days to request a hearing under INA § 336 or you can refile a new N-400.
You will receive a written denial notice explaining the specific grounds. Within 30 days you can file Form N-336 (Request for Hearing) with a $700 fee to have your case reviewed by a different USCIS officer. If the N-336 hearing also results in denial, you may petition a U.S. federal district court under INA § 310(c). You may also simply refile a new N-400 if the grounds for denial no longer apply.
Under INA § 320, a child under 18 who is a lawful permanent resident automatically becomes a U.S. citizen when a parent naturalizes, provided the child is residing in the U.S. in the legal and physical custody of the citizen parent. To get official documentation for the child, file Form N-600 (Application for Certificate of Citizenship).
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