Updated June 17, 2026
Check your naturalization eligibility
Tell it your green card date and whether you qualify for the 3-year track, and it works out which rule applies to you. Educational estimate only, not legal advice.
The standard naturalization requirement is 5 years of lawful permanent residence with at least 30 months of physical presence and continuous residence throughout. A 3-year track applies if you have been married to and living with the same U.S. citizen for 3 years, held a green card for those same 3 years, and logged at least 18 months of physical presence. Special rules exist for certain military service members and a narrow set of other categories. This is educational information, not legal advice. Consult an immigration attorney to confirm your eligibility.
Naturalization Rules Details
Two separate residency clocks lead to the same form. The 5-year rule is the default. The 3-year rule is narrower, available only to people whose green card came through marriage to a U.S. citizen and who have kept that marriage intact the whole time. Neither rule waives the physical presence, good moral character, English, or civics requirements; they only change how long the waiting period lasts.
The 5-year rule: who qualifies
The 5-year rule is the default for most applicants: employment-based green card holders, diversity visa lottery winners, family preference category recipients, refugees and asylees after adjusting status. After 5 years of lawful permanent residence with continuous residence maintained and at least 30 months of physical presence, you can file Form N-400. See physical presence requirements and continuous residence requirements for how those are calculated.
The 3-year rule: eligibility conditions
Three conditions must all hold simultaneously for the 3-year track to apply: you must have been a lawful permanent resident for at least 3 years, married to the same U.S. citizen throughout that period, and living in marital union with that spouse the entire time. You also need at least 18 months of physical presence during those 3 years. Your spouse must still be a U.S. citizen when you file Form N-400. If the marriage ends before you naturalize, you fall back to the standard 5-year rule with no credit carried over.
How to calculate your earliest filing date
The clock starts on the date USCIS granted your lawful permanent residence, shown as the "Resident Since" date on your green card. USCIS permits filing Form N-400 up to 90 days before the statutory anniversary, so the queue starts sooner than many people expect. If your green card was granted July 1, 2020, the 5-year mark is July 1, 2025, and the earliest filing date is April 2, 2025. Use the eligibility calculator to find your specific date.
Military and other special rules
Members of the U.S. Armed Forces who serve honorably during a designated period of hostilities may qualify for naturalization with reduced or no residency requirements. A small number of other exceptions apply, including certain employees of qualifying U.S. organizations working abroad. Both categories carry specific conditions not covered here; see uscis.gov or consult an immigration attorney before relying on either.
What does not change between the rules
Both tracks require continuous residence, the applicable physical presence minimum, good moral character, English language ability (with limited age and disability exceptions), and a passing civics test score. The 3-year rule shortens the waiting period only. The interview, the English test, and the 10-question civics exam (requiring 6 correct answers from a published pool of 100) apply the same way regardless of which track you use. See the N-400 process explained for the full application walkthrough.
Check your naturalization eligibility
Tell it your green card date and whether you qualify for the 3-year track, and it works out which rule applies to you. Educational estimate only, not legal advice.