The U.S. citizenship 5-year rule, explained carefully.

01

Who can use the five-year route?

An applicant generally must be at least 18 and have been lawfully admitted for permanent residence for the required five-year period. You must retain permanent resident status and satisfy the other naturalization requirements through the process.

Before filing Form N-400, check whether you may already be a citizen through birth or a U.S. citizen parent. If so, a citizenship certificate or passport may be the correct route.

02

Continuous residence is not the same as physical presence

Continuous residence asks whether the United States remained your principal dwelling. Physical presence counts the days you were actually in the United States. A person can satisfy one test and fail the other.

• Maintain five years of continuous residence before filing, subject to statutory exceptions.
• Accumulate at least 30 months—USCIS describes this as 913 days—of physical presence during those five years.
• Live for at least three months in the state or USCIS district with jurisdiction, unless a special rule applies.

03

How trips outside the United States affect the clock

An absence of more than six months but less than one year creates a rebuttable presumption that continuous residence was interrupted. An absence of one year or more generally breaks continuous residence unless a specific exception or approved preservation rule applies.

A re-entry permit helps document an intention to return but does not automatically preserve residence for naturalization. Certain qualifying employment abroad may support Form N-470; the requirements and timing are narrow.

04

What the 90-day early-filing rule does—and does not do

USCIS permits many five-year applicants to file up to 90 calendar days before completing the required continuous-residence period. It does not shorten the lawful-permanent-resident period for every other purpose, and all other filing requirements must already be satisfied.

Count calendar days using the USCIS early-filing calculator rather than assuming that three months always equals 90 days.

05

The remaining requirements

Most applicants must demonstrate basic English and civics knowledge, good moral character during the statutory period, attachment to constitutional principles and willingness to take the Oath of Allegiance. Age-and-residence exceptions, disability exceptions and accommodations may change how testing is administered.

• Review every trip, address and job against the filed form.
• Collect required tax and selective-service evidence where relevant.
• Get individualized advice before filing if arrests, false claims to citizenship, voting, immigration violations or long absences may be involved.