N-400 Early Filing Calculator

Find the first day you can apply for citizenship, and see if your trips abroad cause a problem.

N-400 Early Filing Calculator
Trips outside the U.S.
Add every trip of 24 hours or more. Planned trips are fine.

Before you file

  • You must have lived for at least 3 months in the state, or the USCIS district, where you file.
  • Good moral character is judged for the whole 5 years (3 years for the spouse rule) before you file, and until you take the oath.
  • The N-400 asks you to list every trip outside the U.S. in that period, except day trips finished within 24 hours. Match your passport stamps.
  • Trips after you file also count. A long absence before the oath can still break continuous residence.

Next steps

General information, not legal advice. Dates follow the USCIS Policy Manual, Volume 12. USCIS decides each case. If you were away a year or more, were away more than 6 months, or have a complicated history, talk to an immigration attorney or accredited representative before you file.

How the earliest filing date is worked out

Most green card holders must live in the U.S. for 5 years before they can become citizens. USCIS lets you send Form N-400 up to 90 days before that fifth anniversary. The date to start from is the Resident Since date on your green card.

If you are married to a U.S. citizen and you have lived together, the period is 3 years. The 90-day head start only applies to the 3 years as a green card holder. You still need a full 3 years of marriage, and your spouse must have been a citizen for all 3 of those years, on the day you file.

Filing early does not make you a citizen early. You cannot take the oath until the full 5 years (or 3 years) is complete.

Trips abroad: the 6-month and 1-year rules

  • 6 months or less (180 days or fewer): no presumption. Many short trips can still be questioned if they suggest your home is not in the U.S.
  • More than 6 months but less than 1 year: USCIS presumes you broke your continuous residence. You can show you did not with proof such as your job, your home or lease, your family in the U.S., and tax returns filed as a U.S. resident.
  • 1 year or more: your continuous residence is broken. With the 5-year rule you can apply again 4 years and 1 day after you came back, and you will still have to explain the trip. After 4 years and 6 months the presumption no longer applies. With the 3-year rule the dates are 2 years and 1 day, and 2 years and 6 months.

Only a few people can protect a long absence, with Form N-470, for example people working abroad for the U.S. government or certain U.S. employers. If you think that fits you, speak to an immigration lawyer before you travel.

Counting your days in the U.S.

You need 913 days in the U.S. in the 5 years before you file, or 548 days in the 3 years before you file under the spouse rule. USCIS counts the day you leave and the day you return as days in the U.S. Only the full days in between count as days abroad. A trip from June 1 to June 10 is 8 days abroad.

The calculator shows how many days you have on the first possible filing date. If you are short, it finds the day you reach the minimum, based only on the trips you entered.

Frequently asked questions

How early can I file Form N-400?
You can file up to 90 calendar days before you complete your continuous residence period. That is 5 years as a green card holder, or 3 years if you are married to a U.S. citizen and meet the marriage rules. You cannot take the oath until the full period is complete.
Does a trip of more than 6 months break my continuous residence?
USCIS presumes it does when you are away more than 6 months (more than 180 days) but less than 1 year. You can overcome this with proof that you kept your life in the U.S., such as your job, your home, your family, and U.S. tax returns filed as a resident.
What happens if I was outside the U.S. for 1 year or more?
A trip of 1 year (365 days) or more breaks your continuous residence. Under the 5-year rule you can apply again 4 years and 1 day after you return, but you must still explain the long trip. If you wait 4 years and 6 months, the presumption no longer applies. For the 3-year spouse rule the dates are 2 years and 1 day, or 2 years and 6 months.
Do the day I leave and the day I return count as days in the U.S.?
Yes. USCIS counts both the day you depart and the day you return as days of physical presence in the United States. Only the days in between are counted as days abroad.
How many days must I be physically in the U.S.?
At least 913 days (30 months) in the 5 years before you file, or at least 548 days (18 months) in the 3 years before you file if you use the spouse of a citizen rule.
Do I have to list short trips on the N-400?
List every trip outside the U.S. in the last 5 years (3 years for the spouse rule). The form says not to include day trips where the whole trip was finished within 24 hours.

Sources

Checked October 20, 2026