After obtaining a Green Card, what are the residency and physical presence requirements necessary to apply for U.S. Citizenship through Naturalization (Form N-400)?

Naturalization is the process by which a Lawful Permanent Resident (LPR) voluntarily becomes a U.S. citizen. The primary requirements revolve around continuous residence and physical presence in the United States, as outlined in the Immigration and Nationality Act (INA).

General Eligibility Requirements for Naturalization (Form N-400):

• Age: Must be at least 18 years old at the time of filing.
• LPR Status: Must have been a Lawful Permanent Resident for at least five years (or three years if married to and living with a U.S. citizen spouse).
• Continuous Residence: The applicant must demonstrate continuous residence in the U.S. for the statutory period preceding filing (five or three years). Continuous residence means the applicant has not taken any single trip outside the U.S. lasting six months or more. A trip of one year or more automatically breaks continuous residence, requiring the applicant to restart the clock from the date of re-entry as an LPR.
• Physical Presence: The applicant must have been physically present in the U.S. for at least half of the required residency period (i.e., 30 months out of the five-year period, or 18 months out of the three-year period).
• Good Moral Character (GMC): Must establish GMC for the statutory period preceding filing. Certain crimes (like aggravated felonies or crimes of moral turpitude) can permanently bar GMC, while others (like failing to pay taxes or providing false information to USCIS) can create temporary bars.
• English and Civics Knowledge: Must pass tests demonstrating the ability to read, write, and speak basic English, and possess knowledge of U.S. history and government (civics).
• Attachment to the Constitution: Must be willing to support and defend the U.S. Constitution.

Exceptions and Special Cases: Spouses of U.S. citizens married for three years may qualify sooner if they meet the three-year continuous residence and physical presence requirements. Members of the U.S. military may have significantly reduced or waived residency/physical presence requirements under INA Section 329.

Applicants file Form N-400 with USCIS. After filing, they attend a biometrics appointment, followed by an interview where the English and Civics tests are administered. If successful, the final step is the Oath of Allegiance ceremony.