United States Citizenship (Naturalization)

Key parameters
Presence	913 days
Qualifying period	5 years
Counting	Any part of a day
Alternative	548 days / 3 years (spouse route)
Additional requirements	Less 180 days (6 months) abroad per trip

This applies to lawful permanent residents applying to naturalize, however the green card was obtained.

There are two routes, and which one you're on sets both the qualifying period and the presence requirement:

• Standard route — 5 years as a lawful permanent resident, with 913 days of physical presence inside it.
• Spouse of a US citizen — 3 years as a permanent resident and 548 days of physical presence, living in marital union with the citizen spouse throughout.

Both routes then run the same two tests in parallel, and they measure different things:

• Continuous residence — whether your residence was unbroken. It's about the shape of your absences, and a single long trip can break it even if your total time abroad is modest.
• Physical presence — the arithmetic total of days actually in the US. Many short trips can fail this while never breaking continuity.

Passing one and failing the other isn't enough — both have to hold at the same time.

Residence isn't the only requirement. You also need 3 months in the state or district where you file, good moral character across the qualifying period, and passes in the English and civics tests.

• The two tests fail independently. Someone who never leaves for more than a month can still miss 913 days of physical presence, and someone with plenty of presence can break continuity with one long trip.
• A re-entry permit protects your green card, not your naturalization clock. It preserves permanent residence during a long absence, but the same absence can still break continuous residence for citizenship purposes.
• Filing taxes as a non-resident undermines both. It's a formal statement that you don't reside in the US, and it contradicts the residence these tests are built on.
• A specific application preserves continuity for some overseas work. People employed abroad by qualifying US employers, research institutions or religious organisations can apply for it, having first spent an unbroken year in the US as a permanent resident. It protects continuous residence only — physical presence still has to be met unless the work is for the US government or is religious.
• Good moral character is assessed across the qualifying period and certain conduct bars it absolutely, entirely separately from any day count.
• Officers may check your residence with people around you. Since late 2025 caseworkers can again interview neighbours, employers or colleagues to verify that you live where you say you do.

A refusal on residence grounds usually means restarting rather than reapplying, and after a year-long absence the wait runs to roughly four and a half years from your return. One miscalculated trip can therefore cost most of a fresh qualifying period. The fee isn't refunded, and where the refusal touches good moral character or the accuracy of the application it reaches further, since misrepresentation can put your permanent residence itself at risk. Professional advice is strongly recommended in situations like this.

Clearing both tests comfortably

You've held a green card for six years, live and work in the US, and travel abroad three or four weeks a year. Your physical presence is far past 913 days and no single absence approaches 180 days (6 months), so both tests hold.

Enough presence, broken continuity

Across five years you've spent around 1,150 days in the US — well past 913 — but one seven-month trip abroad sits in the middle. Being over the 180-day (6-month) line, that trip is presumed to have broken continuity, and unless you rebut it with evidence of maintained ties the application fails.

Continuity intact, presence short

You travel constantly for work, never away for more than five weeks at a time, so continuity is never in question. But your days in the US across five years total around 800, short of the 913 required, so the presence test fails.

• USCIS — Citizenship through naturalization
• USCIS Policy Manual — Continuous residence and physical presence