N-400 naturalization date + days in the U.S. calculator
Before applying for citizenship, the two most common questions are the earliest date you can file and whether too much travel will leave you short on days. Enter the date you became a permanent resident and your trips abroad over the past few years, and the calculator checks three requirements at once: years as a green card holder, physical presence in the U.S., and long absences.
How to use it
- Find the "Resident Since" date on the front of your green card and enter it in the first field. If your conditional green card was later made permanent, the naturalization period still runs from the date you first obtained conditional residence.
- Choose your path: generally 5 years; 3 years if you are married to and living with a U.S. citizen.
- Enter each date you left and returned to the U.S. Include every trip within the past 5 years (or 3 years). You can also enter planned trips to see their effect in advance.
- If you already have a planned filing date, enter it and the calculator will check that date separately.
Calculation rules and legal basis
| Item | Rule | Basis |
|---|---|---|
| Years as a green card holder | Generally 5 years; 3 years if you have been married to and living with a U.S. citizen spouse who has been a citizen for 3 years | INA §316(a), §319(a) |
| Early filing | You may file 90 days before reaching the required period | INA §334(a); 8 CFR 334.2(b) |
| Physical presence | In the U.S. for at least half of the statutory period: 30 months on the 5-year path (counted as 913 days), 18 months on the 3-year path (counted as 548 days) | INA §316(a); 8 CFR 316.2(a)(4) |
| How days abroad are counted | Following common USCIS practice, the day you leave and the day you return both count as days in the U.S.; only the full days in between count as time abroad | USCIS practice |
| Long absences | A single trip of more than 6 months but less than 1 year: presumed to break continuous residence, which you can rebut with evidence; 1 year or more: breaks continuous residence | 8 CFR 316.5(c)(1) |
| Restarting after a break | After returning from an absence of 1 year or more, on the 5-year path you may file once 4 years and 1 day have passed since your return (2 years and 1 day on the 3-year path) | 8 CFR 316.5(c)(1)(ii) |
Requirements the calculator does not check include: 3 months of residence in your state or USCIS district before filing, good moral character, the English and civics tests, and, on the 3-year path, your spouse's citizenship and the living-together requirement. See N-400 naturalization requirements and process.
Common questions
My trips were all under 6 months, but there were many of them. Does that matter?
Short trips do not break continuous residence, but each one reduces your physical presence. If your total time in the U.S. is less than half the statutory period, you will need to delay filing.
Do I need to list day trips to Canada or Mexico?
Keep an accurate record of them. Form N-400 asks you to list trips outside the U.S. longer than 24 hours during the statutory period; under this calculator's method, a same-day round trip does not count as a day abroad.
I had a trip of 6 months to 1 year. Can I still file on the calculated date?
You can file, but the officer will presume continuous residence was broken, and you will need evidence to rebut that, for example keeping your U.S. job or home, continuing to file U.S. taxes, or family remaining in the U.S. during the trip. We recommend consulting an attorney before filing to assess whether your evidence is sufficient.
Does a reentry permit preserve continuous residence for naturalization?
No. A reentry permit only helps you keep your green card and return to the U.S. To preserve continuous residence for naturalization during a long absence, you must qualify for and obtain approval of Form N-470 in advance (limited to situations such as working abroad for the U.S. government, certain U.S. companies or international organizations).
Related reading
- From green card to citizen: N-400 requirements and process
- Green card travel risk check
- Reentry permit (I-131): what green card holders should do before a long absence
Complicated travel history, or a long trip abroad in the past? Book an attorney consultation and we will help you check your days and continuous residence.
Results are for reference only and are not legal advice. Laws and policies may change; rely on the latest USCIS information and an attorney's advice for your specific situation.