1. What is N400 Early Filing?

The N400 Early Filing rule allows eligible permanent residents to apply for naturalization (Form N-400) up to 90 days before they complete the continuous residence requirement (typically 5 years as a permanent resident).

2. How Does the Calculator Work?

The calculator uses the USCIS early filing rule:

Where:

• PR Date — Date you became a permanent resident (green card approval date)
• 5 years — Standard continuous residence requirement
• 90 days — Maximum early filing period allowed by USCIS

Explanation: This calculation gives you the earliest date you can submit your N400 application without being rejected for filing too early.

3. Importance of Early Filing Date

Details: Filing as early as possible can help you begin the naturalization process sooner, but filing too early will result in your application being rejected.

4. Using the Calculator

Tips: Enter your permanent resident date (green card approval date) in the format MM/DD/YYYY. The calculator will determine your earliest eligible filing date.

5. Frequently Asked Questions (FAQ)

Q1: Is the 90-day rule exact?
A: Yes, USCIS will reject applications filed more than 90 days before your eligibility date.

Q2: What if I have a 3-year marriage-based eligibility?
A: The same 90-day rule applies, but the base period is 3 years instead of 5.

Q3: Does this account for leap years?
A: Yes, the calculator automatically accounts for leap years in the date calculation.

Q4: What time zone is used for the filing date?
A: USCIS considers the date your application is received at their lockbox facility.

Q5: Can I file online on the early date?
A: Yes, online filings are accepted starting at 12:00 AM Eastern Time on your eligibility date.