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How to Fill Out Form N-400 for U.S. Naturalization

Form N-400 requires more than identity data. It covers continuous and physical residence, good moral character, and English and civics requirements.

Official edition: 01/20/25
Start the guided prefillDownload official form PDFDownload official instructions

This preparation and review worksheet is not an official USCIS form and cannot be filed.

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Part 1

Eligibility

Choose the five-year, three-year spouse, military, or other naturalization basis.

Choose one applicable category in official Part 1.

Copy the Resident Since date from the Green Card.

Confirm only under the USCIS calculation rule.

How to prepare Form N-400

Confirm eligibility and filing category first, then match every answer to passports, civil documents, and immigration records.

  1. 1

    Confirm the eligibility basis

    Calculate permanent-resident date, marital period, 90-day early filing, and special-category rules.

  2. 2

    Build residence, work, and family timelines

    Residence and employment histories should have no month gaps during the required period.

  3. 3

    Calculate every trip abroad

    Verify departures, returns, total days, and trips lasting six months or more.

  4. 4

    Review character and eligibility questions

    Prepare tax, arrest, support, Selective Service, organization, and immigration records.

  5. 5

    Verify edition, fee, and filing method

    Reopen the official USCIS page on the filing date and verify edition, fee, online eligibility, and mailing instructions.

  6. 6

    Transfer to the official form and sign

    Transfer verified English answers to the current official PDF or myUSCIS, attach evidence, and complete every required signature.

Common evidence checklist

Evidence varies by category and case. Use this list to prepare, then review the current official instructions before filing.

  • Green Card, passport, and travel records
  • IRS tax transcripts, payment plan, or filing explanation
  • Marriage, divorce, spouse citizenship, and marital-union evidence
  • Certified arrest, court, probation, and final-disposition records
  • Selective Service, military, and dependent-support records
  • Complete certified translations of all non-English records

Form N-400 FAQs

Must I wait five full years to file N-400?+

Some five-year and three-year applicants may file up to 90 days early, but all other eligibility requirements still apply.

Does a trip over six months affect naturalization?+

It may disrupt the presumption of continuous residence; absences of one year or more generally present greater risk, subject to specific exceptions.

Must an arrest without conviction be disclosed?+

Generally disclose arrests, citations, and outcomes as asked and prepare certified records even if dismissed or sealed.

Can this worksheet be filed directly with USCIS?+

No. This is a N-400 preparation and English review worksheet. Transfer the answers to the current official form or USCIS online system.

Should AI translate a person's name?+

No. Use the existing English spelling on the passport or official record. Names and identification numbers are never sent to AI.

Why are the fee and mailing address not hardcoded?+

USCIS changes fees, Lockbox routing, and online-filing eligibility. Verify the official page on the day of filing.

A free public reference tool. Not legal advice or affiliated with the U.S. government.Verify with official USCIS information
How to Fill Out Form N-400: U.S. Citizenship Application Guide | HuaRenCa