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N-400 eligibility calculator

Estimate the earliest date you can file for naturalization, and check two common requirements: physical presence and continuous residence.

Estimate only. This is general information, not legal advice, and it can’t guarantee any outcome. Results are only as accurate as what you enter.

Who this is for

Permanent residents thinking about applying for U.S. citizenship through the general 5-year rule, or the 3-year rule for people married to and living with a U.S. citizen. Other paths, such as military service, have different rules.

Use the “Resident Since” date on your green card.

Which rule applies to you?

Trips outside the United States

Add each trip since you became a permanent resident, or at least in the last 5 years. The day you leave and the day you return both count as days in the U.S.

Your citizenship interview includes a civics test.

The USCIS officer asks up to 20 of 128 questions out loud, and you need 12 correct. Practice all 128 official questions with a practice test, multiple choice, flashcards and read-aloud.

Try it free

Some applicants qualify for an exemption or an easier version, such as the 65/20 questions. See USCIS for details.

How the estimate works

  1. Earliest filing date: your green card date plus 5 years (or 3 years), minus 90 days. USCIS lets you file up to 90 days before you meet the residence requirement.
  2. Physical presence: you generally need to have been physically in the U.S. for at least half of the period: 913 days for the 5-year rule, or 548 days for the 3-year rule. The tool adds up your days outside the U.S. and subtracts them.
  3. Continuous residence: a trip of more than six months but less than a year can create a presumption that continuous residence was broken. A trip of a year or more generally breaks it.

What this tool does not check

Good moral character, time spent living in your state or USCIS district, age, English and civics tests, selective service, taxes, past immigration or criminal issues, and exceptions for certain groups. Any of these can change your answer. Check the official sources below, and ask a licensed immigration attorney or DOJ-accredited representative if you are unsure.

Privacy: Everything is calculated in your browser. What you enter is not sent to us or stored.

Need help organizing your documents?

One Path Finder can help you gather and organize documents where permitted by law. We are not a law firm and can’t tell you what applies to your case. Contact us to start a conversation. For legal advice, ask us for a referral to our partner law firm.

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Official sources