What Is Form N-400
Form N-400 is the official USCIS application for naturalization, the legal process through which you become a U.S. citizen. You file this form after you've held a green card for the required time period, typically 5 years for most applicants or 3 years if you're married to a U.S. citizen. The form itself is 12 pages and requires detailed information about your background, residence history, moral character, English proficiency, and civics knowledge.
Filing N-400 signals that you're ready to take the final step from permanent resident to citizen. This matters because citizenship provides benefits that a green card doesn't: you can vote in federal elections, sponsor immediate family members more easily, work in certain federal positions, and you can't be deported.
Eligibility Requirements
You must meet specific criteria before filing N-400. Generally, you need to be a green card holder for 5 years, though this drops to 3 years if your spouse is a U.S. citizen. You also need to demonstrate continuous residence in the U.S. during that time, physical presence for at least half the period, and good moral character. USCIS also requires that you read, write, and speak English at a basic level, and pass a civics test covering U.S. government and history.
Timing matters. If you file N-400 before you've met the time requirement, USCIS will deny your application. You can file up to 3 months before your anniversary date to speed up processing.
The Filing Process
- Prepare your application: Gather documents including your green card, passport, state ID, tax returns for the past 5 years, and evidence of continuous residence. You'll need to account for every day outside the U.S.
- Submit to USCIS: File N-400 by mail or through USCIS online account. The filing fee is currently $640 with an $85 biometric fee, though fee waivers are available if you meet income requirements.
- Biometric appointment: USCIS will schedule you for fingerprinting, usually within 1-3 months of filing.
- Interview and test: A USCIS officer will interview you, verify your information, and conduct the English and civics tests. You must answer at least 6 out of 10 civics questions correctly.
- Decision: USCIS will approve, deny, or request additional evidence. Processing typically takes 8-12 months from filing to oath ceremony.
Common Questions
- Can I travel while my N-400 is pending? Yes, but you need "advance parole" if you want to return to the U.S. File Form I-131 with your N-400 or separately to get permission to reenter if you leave.
- What if I have a criminal record? Certain crimes prevent naturalization. Felonies, crimes of moral turpitude, and drug offenses can make you ineligible or even trigger deportation. Consult an immigration attorney before filing if you have any record.
- Do I need a lawyer to file N-400? Not legally required, but USCIS statistics show applicants represented by attorneys have higher approval rates. An attorney can identify issues early and strengthen your application.
How N-400 Fits Into Your Immigration Journey
N-400 is the final step after you've completed the green card process through adjustment of status or consular processing. If you obtained your green card through employment sponsorship, family petition, or diversity visa, N-400 comes only after you've maintained that green card status for the required time. If you're on certain visa categories like H-1B or L-1, you must first secure a green card before you're eligible for N-400. Priority dates and processing times for your green card don't affect N-400 eligibility once you have the card in hand, but the path to that green card can take years depending on your category and country of birth.