What are the basic requirements for naturalization?

USCIS naturalization requirements usually include being at least 18, being a lawful permanent resident for the required period, meeting residence and physical presence rules, showing good moral character, and passing English and civics requirements unless an exception applies.

Should I check eligibility before filing Form N-400?

Yes. Reviewing USCIS eligibility requirements before filing can help you avoid filing too early or submitting an application that needs more evidence.

N-400 Eligibility Requirements Explained

Written and reviewed by the N400Test.com team against official USCIS sources · Last reviewed April 2026 · Educational information, not legal advice.

Form N-400 is the application most permanent residents use to apply for naturalization. Before filing, review the basic USCIS requirements so you can decide whether you appear ready to apply or whether you need more time, records, or guidance.

Main Eligibility Areas USCIS Reviews

Age. Most applicants must be at least 18 years old when they file Form N-400.
Lawful permanent residence. You usually need to be a permanent resident for the required period before applying.
Continuous residence. USCIS reviews whether you kept your main home in the United States during the required period.
Physical presence. USCIS counts the time you were actually present in the United States.
Good moral character. USCIS reviews conduct such as criminal history, taxes, selective service, and truthful answers.
English and civics. Most applicants must complete the English test and civics test unless an exception or accommodation applies.

When to Be Extra Careful Before Filing

Consider speaking with an immigration attorney or accredited representative if you have criminal history, complicated travel, unpaid taxes, prior immigration fraud concerns, removal history, or uncertainty about how you received your Green Card.

Frequently Asked Questions

Can I apply before my full waiting period is over? USCIS instructions explain when early filing may be available. Check the current Form N-400 instructions before filing.

Does eligibility guarantee approval? No. Filing means you are asking USCIS to review your case. The officer still reviews your application, evidence, interview answers, and background checks.

Official USCIS Sources

This article is for educational purposes and is based on USCIS materials available when last reviewed. Always check USCIS.gov for the current version of forms, fees, and policy.