U.S. Citizenship After Residence
At a glance
U.S. naturalization is the ordinary citizenship route for lawful permanent residents who have enough residence, physical presence, good moral character, and English/civics readiness.
- Type
- Citizenship by naturalization
- Core timing
- Usually 5 years as a lawful permanent resident
- Core requirements
- Residence, physical presence, good moral character, English, and civics
- What to know
- Travel history and criminal or immigration issues can matter
- What it gives
- After approval and the oath, the applicant becomes a U.S. citizen.
- Main limit
- A green card's expiration does not end permanent-resident status, but an expired card can create proof and travel problems.
Summary
Naturalization is the main route by which an adult lawful permanent resident becomes a U.S. citizen. The usual rule requires five years as a permanent resident, enough physical presence in the United States, continuous residence, good moral character, English and civics knowledge, and the Oath of Allegiance.
Approval is not automatic after holding a green card for five years. USCIS reviews how permanent residence was obtained, travel, taxes, criminal and immigration history, selective-service issues when applicable, and the answers on Form N-400.
Eligibility
Under the general five-year route, an applicant normally must:
- Be at least 18 when filing;
- Have been lawfully admitted for permanent residence and held that status for five years;
- Have continuously resided in the United States for those five years;
- Have been physically present for at least 30 months during that period;
- Have lived for at least three months in the state or USCIS district where filing;
- Show good moral character during the required period and through the oath;
- Pass the applicable English and civics requirements, unless an age/time or disability exception applies; and
- Support the Constitution and take the Oath of Allegiance.
USCIS permits filing up to 90 calendar days before the continuous-residence period is complete, but the other requirements still must be met. An absence longer than six months can create a presumption that continuous residence was broken; an absence of a year or more generally breaks it unless a statutory preservation or military rule applies.
What This Route Allows
After approval and the oath, the applicant becomes a U.S. citizen. Citizenship supports a U.S. passport, voting when eligible, eligibility for certain public offices and federal jobs, and broader family-petition categories.
For N-400 applications filed on or after October 20, 2025, USCIS uses the 2025 civics test. Earlier filings use the test specified by USCIS. Age-and-residence exceptions and Form N-648 medical disability exceptions may change the testing requirement.
What This Route Is Not
A green card's expiration does not end permanent-resident status, but an expired card can create proof and travel problems. Conversely, renewing a green card does not solve a possible abandonment or continuous-residence problem.
Naturalization does not erase past conduct. A false statement, undisclosed arrest, tax issue, unlawful voting or citizenship claim, or defect in the original green-card case can lead to denial and may create removal risk. USCIS now applies a totality-of-the-circumstances approach to good moral character under its current policy.
Next Steps
- Obtain a complete travel history and count physical-presence days.
- Review tax filings, criminal records (including sealed or expunged matters), immigration filings, selective-service history, and any claim to vote or be a U.S. citizen.
- Confirm which civics test and any English/civics exception applies.
- Use the current Form N-400 instructions and fee page; fees and editions change.
- Get legal advice before filing if there were lengthy trips, arrests, prior immigration errors, or questions about whether permanent residence was lawfully obtained.