United States · Naturalization timing
N-400 early filing date calculator.
Enter the date on your green card. The tool counts back 90 days from the day your continuous-residence period is complete and shows any date that sets a later limit.
You may file Form N-400 up to 90 days before you complete 5 years (or 3 years, if the marriage route applies) as a permanent resident. In the USCIS Policy Manual's example, a five-year requirement first met on June 10, 2010 means the earliest filing date is March 12, 2010.
The rule and where it comes from
8 CFR 334.2(b) says an application for naturalization may be filed up to 90 days before the completion of the required period of residence. The N-400 instructions apply that to both routes: if you are applying on 5 years as a permanent resident, you may generally file up to 90 days before you meet the 5-year period of continuous residence. If you are applying on marriage to a U.S. citizen, you may generally file up to 90 days before meeting the 3-year period.
USCIS's Policy Manual gives an example: if the five-year requirement is first met on June 10, 2010, the earliest permissible filing date is March 12, 2010. That is exactly 90 days earlier. This tool subtracts 90 calendar days from the date your period is complete, which it takes to be the anniversary of the date you became a permanent resident.
What the early window does not relax
The instructions say an early filer must still meet every other requirement on the filing date, or must wait. USCIS rejects an application submitted too early. Two examples from the instructions:
- On the marriage route you must already have been married to a U.S. citizen for at least 3 years when you file, and the instructions list that your spouse must have been a citizen for at least 3 years and that you have lived in marital union for at least 3 years. Only the permanent-resident period gets the 90-day window.
- If you ask for an exception to the English testing requirement, you must meet its age and years-as-a-resident conditions when you file.
The tool therefore takes the later of the three dates on the marriage route and tells you which one binds. You also need to have lived in the state or USCIS district for at least 3 months before filing, and to meet physical presence: 913 days in the past 5 years, or 548 days in the past 3 on the marriage route.
Worked examples
Five-year route. The Policy Manual case: complete on June 10, 2010, earliest filing March 12, 2010. Hypothetically, a card dated July 4, 2021 completes five years on July 4, 2026, so the earliest filing date is April 5, 2026. A card dated April 20, 2021 gives January 20, 2026.
Marriage route, hypothetical. Green card November 1, 2023, so three years end November 1, 2026 and the residence window opens August 3, 2026. But the couple began living together October 15, 2023, so three years of marital union is not met until October 15, 2026, with no early window. The earliest filing date is October 15, 2026, and the marriage date binds.
Breaks in continuous residence
The date is only useful if the residence is unbroken. The instructions say you do not meet the requirement if you left the U.S. for a continuous period of 1 year or more during the required period, and if an absence was more than 6 months but less than 1 year you must show you did not break continuity, for example by keeping your U.S. job and home. A trip longer than six months can therefore make the calculated date unsafe.
Common mistakes
- Counting back from the date of the approval notice or the green card's expiry rather than the Resident Since date.
- Subtracting three months instead of 90 calendar days.
- Using the 3-year route without checking when the marriage and the spouse's citizenship reached 3 years.
- Filing on the earliest date with a trip over six months in the period.
- Ignoring a February 29 date. A card dated February 29 has no anniversary in a non-leap year. The tool uses March 1 and says so; confirm with USCIS.
What this does not cover
Good moral character, the English and civics tests, military or other special routes, the fee, or whether USCIS's own Early Filing Calculator would round an unusual case differently. It does not read your travel history.
Sources
- eCFR: 8 CFR 334.2, application for naturalization — Paragraph (b): up to 90 days before the required residence period is complete.
- USCIS: Instructions for Form N-400 (01/20/25) — Early Filing section, marriage-route requirements, 913 and 548 days, continuous residence.
- USCIS Policy Manual, Volume 12, Part D, Chapter 6 — Early filing 90-day provision and the June 10, 2010 example.
- USCIS: Form N-400 — Filing window, edition 01/20/25, $710 online or $760 on paper.
Retrieved October 2026. USCIS also publishes an Early Filing Calculator, named in the N-400 instructions; use it as the final check.
Frequently asked questions
How early can I file Form N-400?
Up to 90 calendar days before you complete the continuous residence period, which is 5 years as a permanent resident, or 3 years if you are applying on marriage to a U.S. citizen. 8 CFR 334.2(b) allows filing up to 90 days before the required residence is complete.
How do I calculate the 90-day early filing date?
Take the date your 5-year (or 3-year) period is complete, the anniversary of the date on your green card, and subtract 90 calendar days. USCIS's Policy Manual example: complete on June 10, 2010 means the earliest filing date is March 12, 2010.
What happens if I file my N-400 too early?
The N-400 instructions say USCIS will reject an application submitted too early, and that an early filer who does not meet the other requirements at filing must wait or the application will be rejected or denied.
Does the 90-day rule apply to the 3-year marriage route?
Partly. The 90-day window applies to the 3-year permanent-resident period. The instructions require that you already have been married to and living in marital union with your citizen spouse for 3 years, and that your spouse has been a citizen for 3 years, when you file.
Is the date from the green card or the approval notice?
This tool uses the permanent resident date printed on the card as Resident Since. If your card date and your records differ, confirm which one USCIS will use before filing.
How many days of physical presence do I need to file for citizenship?
The N-400 instructions require physical presence of at least 30 months (913 days) in the past 5 years, or 18 months (548 days) in the past 3 years if you are applying as the spouse of a U.S. citizen.
Do I need to live in my state before filing the N-400?
Yes. The instructions say you must have lived in the state or USCIS district where you file for at least 3 months before filing.
Does a long trip abroad change my N-400 date?
It can. An absence of a continuous year or more breaks continuous residence, and an absence of more than 6 months but less than a year requires you to show that you did not break continuity.
Not legal or tax advice
This page applies the 90-day rule to the dates you enter. It is not legal advice and does not check whether you are eligible to naturalize. Confirm the date with the USCIS Early Filing Calculator and the current N-400 instructions.