User guide
What is the N-400 earliest filing calculator?
The N-400 earliest filing calculator uses the green card Resident Since date, the five- or three-year rule, and subtracts 90 calendar days from the statutory anniversary.
How it works
- 1
Enter the Resident Since date printed on the green card.
- 2
Choose the general five-year rule or the three-year marital rule only when all conditions are met.
- 3
The tool calculates the three- or five-year anniversary and subtracts exactly 90 calendar days.
Official sources and methodology
These references come from official U.S. government websites. Check the source for current rules and forms.
Frequently asked questions
Is the earliest date 90 days before the green card date?
No. First calculate the three- or five-year anniversary from Resident Since, then subtract 90 calendar days.
Does the three-year rule apply whenever my spouse is a U.S. citizen?
No. Marital union during the relevant period, the spouse's citizenship period, and all other naturalization requirements generally must be met.