Who it applies to
Eligible spouses of US citizens using the three-year naturalization route.
US spouse route — physical presence
This route tracks the part of the requirement based on days physically present: 548 days within the relevant 3-year period.
Check your own dates: US spouse route — physical presence calculator →
Summary
- Day rule / reminder
- 548 days • last 3 years
- Window
- Last 3 years
- What the tool measures
- The recorded-day component
- Official reference
- USCIS Form N-400 instructions ↗
This route tracks the part of the requirement based on days physically present: 548 days within the relevant 3-year period.
The rule
The total number of days physically present and the continuity of your residence are separate requirements. Lawful status, route eligibility and other naturalization conditions require separate checks. A target number of recorded days does not establish eligibility.
Counting the days
Recorded departure and return dates count.
- Choose the date through which you want to count, then add your recorded visits.
- Use the counting convention above. Overlapping recorded dates in the relevant region are counted only once.
- Read the result alongside the conditions. Missing records and other eligibility requirements are not inferred from a total.
Examples
These examples demonstrate the counter's arithmetic, using a count-through date of 30 October 2026. They do not determine legal status or eligibility.
Example 1 — one recorded visit
- to · United States
Recorded result: 10 days
Example 2 — overlapping records
- to · United States
- to · United States
Recorded result: 15 days
Example 3 — two visits with a gap
- to · United States
- to · United States
Recorded result: 16 days
Exceptions & edge cases
This route has marriage, permanent-residence, continuous-residence, and other conditions that this counter cannot verify.
Use the official reference for the full conditions and any changes since the source review date shown on this page.
Common misconceptions
“A counter result is the same as permission or eligibility.”
The counter measures recorded dates. Your actual permission, status and other conditions remain separate.
“A new calendar year resets this counter.”
This is a rolling window. Dates leave the window as time moves forward.
Frequently asked questions
What does this rule count?
This route tracks the part of the requirement based on days physically present: 548 days within the relevant 3-year period.
Which counting window does this tool use?
Last 3 years. Recorded departure and return dates count.
What else should I check before relying on the total?
This route has marriage, permanent-residence, continuous-residence, and other conditions that this counter cannot verify.
Where can I read the official requirements?
Read USCIS Form N-400 instructions ↗. The source was last reviewed on .
Keep this count with your travel history.
Follow your recorded days and selected reminders in Untild, alongside your other travel counters.
Get Untild for iPhone ↗Sources
Source last reviewed: . This is the source review date, not a claim that every legal condition is calculated.
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